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  • Five Key Strategies in Master Data Management

    - by david.butler(at)oracle.com
    Here is a very interesting Profit Magazine article on MDM: A recent customer survey reveals the deleterious effects of data fragmentation. by Trevor Naidoo, December 2010   Across industries and geographies, IT organizations have grown in complexity, whether due to mergers and acquisitions, or decentralized systems supporting functional or departmental requirements. With systems architected over time to support unique, one-off process needs, they are becoming costly to maintain, and the Internet has only further added to the complexity. Data fragmentation has become a key inhibitor in delivering flexible, user-friendly systems. The Oracle Insight team conducted a survey assessing customers' master data management (MDM) capabilities over the past two years to get a sense of where they are in terms of their capabilities. The responses, by 27 respondents from six different industries, reveal five key areas in which customers need to improve their data management in order to get better financial results. 1. Less than 15 percent of organizations surveyed understand the sources and quality of their master data, and have a roadmap to address missing data domains. Examples of the types of master data domains referred to are customer, supplier, product, financial and site. Many organizations have multiple sources of master data with varying degrees of data quality in each source -- customer data stored in the customer relationship management system is inconsistent with customer data stored in the order management system. Imagine not knowing how many places you stored your customer information, and whether a customer's address was the most up to date in each source. In fact, more than 55 percent of the respondents in the survey manage their data quality on an ad-hoc basis. It is important for organizations to document their inventory of data sources and then profile these data sources to ensure that there is a consistent definition of key data entities throughout the organization. Some questions to ask are: How do we define a customer? What is a product? How do we define a site? The goal is to strive for one common repository for master data that acts as a cross reference for all other sources and ensures consistent, high-quality master data throughout the organization. 2. Only 18 percent of respondents have an enterprise data management strategy to ensure that data is treated as an asset to the organization. Most respondents handle data at the department or functional level and do not have an enterprise view of their master data. The sales department may track all their interactions with customers as they move through the sales cycle, the service department is tracking their interactions with the same customers independently, and the finance department also has a different perspective on the same customer. The salesperson may not be aware that the customer she is trying to sell to is experiencing issues with existing products purchased, or that the customer is behind on previous invoices. The lack of a data strategy makes it difficult for business users to turn data into information via reports. Without the key building blocks in place, it is difficult to create key linkages between customer, product, site, supplier and financial data. These linkages make it possible to understand patterns. A well-defined data management strategy is aligned to the business strategy and helps create the governance needed to ensure that data stewardship is in place and data integrity is intact. 3. Almost 60 percent of respondents have no strategy to integrate data across operational applications. Many respondents have several disparate sources of data with no strategy to keep them in sync with each other. Even though there is no clear strategy to integrate the data (see #2 above), the data needs to be synced and cross-referenced to keep the business processes running. About 55 percent of respondents said they perform this integration on an ad hoc basis, and in many cases, it is done manually with the help of Microsoft Excel spreadsheets. For example, a salesperson needs a report on global sales for a specific product, but the product has different product numbers in different countries. Typically, an analyst will pull all the data into Excel, manually create a cross reference for that product, and then aggregate the sales. The exact same procedure has to be followed if the same report is needed the following month. A well-defined consolidation strategy will ensure that a central cross-reference is maintained with updates in any one application being propagated to all the other systems, so that data is synchronized and up to date. This can be done in real time or in batch mode using integration technology. 4. Approximately 50 percent of respondents spend manual efforts cleansing and normalizing data. Information stored in various systems usually follows different standards and formats, making it difficult to match the data. A customer's address can be stored in different ways using a variety of abbreviations -- for example, "av" or "ave" for avenue. Similarly, a product's attributes can be stored in a number of different ways; for example, a size attribute can be stored in inches and can also be entered as "'' ". These types of variations make it difficult to match up data from different sources. Today, most customers rely on manual, heroic efforts to match, cleanse, and de-duplicate data -- clearly not a scalable, sustainable model. To solve this challenge, organizations need the ability to standardize data for customers, products, sites, suppliers and financial accounts; however, less than 10 percent of respondents have technology in place to automatically resolve duplicates. It is no wonder, therefore, that we get communications about products we don't own, at addresses we don't reside, and using channels (like direct mail) we don't like. An all-too-common example of a potential challenge follows: Customers end up receiving duplicate communications, which not only impacts customer satisfaction, but also incurs additional mailing costs. Cleansing, normalizing, and standardizing data will help address most of these issues. 5. Only 10 percent of respondents have the ability to share data that was mastered in a master data hub. Close to 60 percent of respondents have efforts in place that profile, standardize and cleanse data manually, and the output of these efforts are stored in spreadsheets in various parts of the organization. This valuable information is not easily shared with the rest of the organization and, more importantly, this enriched information cannot be sent back to the source systems so that the data is fixed at the source. A key benefit of a master data management strategy is not only to clean the data, but to also share the data back to the source systems as well as other systems that need the information. Aside from the source systems, another key beneficiary of this data is the business intelligence system. Having clean master data as input to business intelligence systems provides more accurate and enhanced reporting.  Characteristics of Stellar MDM When deciding on the right master data management technology, organizations should look for solutions that have four main characteristics: enterprise-grade MDM performance complete technology that can be rapidly deployed and addresses multiple business issues end-to-end MDM process management with data quality monitoring and assurance pre-built MDM business relevant applications with data stores and workflows These master data management capabilities will aid in moving closer to a best-practice maturity level, delivering tremendous efficiencies and savings as well as revenue growth opportunities as a result of better understanding your customers.  Trevor Naidoo is a senior director in Industry Strategy and Insight at Oracle. 

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  • centos dedicated Server unresponsive for the first time

    - by Ambrose Bwangatto
    server was unresponsive for an hour so i rebooted it and checked /var/log/messages and found this. can anybody point out whats wrong ? Sep 28 07:39:35 www kernel: INFO: task mysqld:22749 blocked for more than 120 seconds. Sep 28 07:39:35 www kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Sep 28 07:39:35 www kernel: mysqld D ffff810001015120 0 22749 3266 22792 22659 (NOTLB) Sep 28 07:39:35 www kernel: ffff810139d21e58 0000000000000086 ffff810036217000 ffffffff8000f758 Sep 28 07:39:35 www kernel: ffff81020dfd1408 0000000000000007 ffff8101cfbaf7e0 ffff81020fca5080 Sep 28 07:39:35 www kernel: 00017a451524782a 00000000000043b2 ffff8101cfbaf9c8 0000000280009a22 Sep 28 07:39:35 www kernel: Call Trace: Sep 28 07:39:35 www kernel: [<ffffffff8000f758>] generic_permission+0x52/0xca Sep 28 07:39:35 www kernel: [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b Sep 28 07:39:35 www kernel: [<ffffffff8000cea2>] do_path_lookup+0x294/0x310 Sep 28 07:39:35 www kernel: [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14 Sep 28 07:39:35 www kernel: [<ffffffff8003c618>] do_unlinkat+0x66/0x141 Sep 28 07:39:35 www kernel: [<ffffffff8005d229>] tracesys+0x71/0xe0 Sep 28 07:39:57 www kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0 Sep 28 07:39:58 www kernel: Sep 28 07:39:59 www kernel: INFO: task httpd:22679 blocked for more than 120 seconds. Sep 28 07:40:04 www kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Sep 28 07:40:08 www kernel: httpd D ffff81000100caa0 0 22679 22413 22680 22678 (NOTLB) Sep 28 07:40:51 www kernel: ffff81018b0dbc78 0000000000000086 ffff81018b0dbc88 0000004480063002 Sep 28 07:41:52 www kernel: ffff81000001cc00 0000000000000007 ffff81013ac5e860 ffff81020fc96100 Sep 28 07:43:10 www kernel: 00017a44de6376c8 000000000000a89f ffff81013ac5ea48 000000010001cc00 Sep 28 07:43:38 www kernel: Call Trace: Sep 28 07:44:06 www kernel: [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b Sep 28 07:44:09 www kernel: [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14 Sep 28 07:44:10 www kernel: [<ffffffff8000d0b2>] do_lookup+0x90/0x1e6 Sep 28 07:44:13 www kernel: [<ffffffff8000a2e9>] __link_path_walk+0xa3a/0xfd1 Sep 28 07:44:16 www kernel: [<ffffffff8000eb8e>] link_path_walk+0x45/0xb8 Sep 28 07:44:16 www kernel: [<ffffffff8000cea2>] do_path_lookup+0x294/0x310 Sep 28 07:44:29 www kernel: [<ffffffff800129ad>] getname+0x15b/0x1c2 Sep 28 07:44:38 www kernel: [<ffffffff80023b60>] __user_walk_fd+0x37/0x4c Sep 28 07:44:42 www kernel: [<ffffffff80028ada>] vfs_stat_fd+0x1b/0x4a Sep 28 07:44:43 www kernel: [<ffffffff8003c69a>] do_unlinkat+0xe8/0x141 Sep 28 07:45:02 www kernel: [<ffffffff80023890>] sys_newstat+0x19/0x31 Sep 28 07:46:18 www kernel: [<ffffffff8005d229>] tracesys+0x71/0xe0 Sep 28 07:46:43 www kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0 Sep 28 07:46:55 www kernel: Sep 28 07:46:58 www kernel: INFO: task php:28906 blocked for more than 120 seconds. Sep 28 07:46:59 www kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Sep 28 07:47:00 www kernel: php D ffff810165127000 0 28906 28905 (NOTLB) Sep 28 07:47:37 www kernel: ffff810078431e58 0000000000000082 ffff810165127000 ffffffff8000f758 Sep 28 07:48:29 www kernel: ffff81020dfd1408 0000000000000007 ffff8101247b9860 ffff810207d0e100 Sep 28 07:48:36 www kernel: 00017a4218932fae 0000000000377111 ffff8101247b9a48 0000000280009a22 Sep 28 07:48:37 www kernel: Call Trace: Sep 28 07:48:37 www kernel: [<ffffffff8000f758>] generic_permission+0x52/0xca Sep 28 07:48:37 www kernel: [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b Sep 28 07:48:37 www kernel: [<ffffffff8000cea2>] do_path_lookup+0x294/0x310 Sep 28 07:48:41 www kernel: [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14 Sep 28 07:48:41 www kernel: [<ffffffff8003c618>] do_unlinkat+0x66/0x141 Sep 28 07:48:42 www kernel: [<ffffffff8005d229>] tracesys+0x71/0xe0 Sep 28 07:48:42 www kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0 Sep 28 07:48:42 www kernel: Sep 28 07:48:43 www kernel: INFO: task php:29032 blocked for more than 120 seconds. Sep 28 07:48:45 www kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Sep 28 07:48:46 www kernel: php D 0000000000000004 0 29032 1 29050 29024 (NOTLB) Sep 28 07:48:46 www kernel: ffff81006b465dc8 0000000000000086 ffff81020dfd1408 ffffffff80009a22 Sep 28 07:48:46 www kernel: 0000000000000000 0000000000000007 ffff81002946e860 ffff81003c943100 Sep 28 07:48:46 www kernel: 00017a4211450766 000000000024be3d ffff81002946ea48 000000020e42b300 Sep 28 07:48:52 www kernel: Call Trace: Sep 28 07:48:54 www kernel: [<ffffffff80009a22>] __link_path_walk+0x173/0xfd1 Sep 28 07:48:54 www kernel: [<ffffffff8002cc58>] mntput_no_expire+0x19/0x89 Sep 28 07:48:55 www kernel: [<ffffffff8000ebf5>] link_path_walk+0xac/0xb8 Sep 28 07:48:55 www kernel: [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b Sep 28 07:48:55 www kernel: [<ffffffff80023974>] __path_lookup_intent_open+0x56/0x97 Sep 28 07:48:55 www kernel: [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14 Sep 28 07:48:55 www kernel: [<ffffffff8001b260>] open_namei+0xea/0x718 Sep 28 07:48:59 www kernel: [<ffffffff80067235>] do_page_fault+0x4cc/0x842 Sep 28 07:49:01 www kernel: [<ffffffff80027726>] do_filp_open+0x1c/0x38 Sep 28 07:49:01 www kernel: [<ffffffff8001a09c>] do_sys_open+0x44/0xbe Sep 28 07:49:02 www kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0 Sep 28 07:49:03 www kernel: Sep 28 07:49:07 www kernel: INFO: task mysqld:22749 blocked for more than 120 seconds. Sep 28 07:49:09 www kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Sep 28 07:49:09 www kernel: mysqld D ffff810001015120 0 22749 3266 22792 22659 (NOTLB) Sep 28 07:49:14 www kernel: ffff810139d21e58 0000000000000086 ffff810036217000 ffffffff8000f758 Sep 28 07:49:14 www kernel: ffff81020dfd1408 0000000000000007 ffff8101cfbaf7e0 ffff81020fca5080 Sep 28 07:49:15 www kernel: 00017a451524782a 00000000000043b2 ffff8101cfbaf9c8 0000000280009a22 Sep 28 07:49:15 www kernel: Call Trace: Sep 28 07:49:22 www kernel: [<ffffffff8000f758>] generic_permission+0x52/0xca Sep 28 07:49:23 www kernel: [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b Sep 28 07:49:23 www kernel: [<ffffffff8000cea2>] do_path_lookup+0x294/0x310 Sep 28 07:49:23 www kernel: [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14 Sep 28 07:49:23 www kernel: [<ffffffff8003c618>] do_unlinkat+0x66/0x141 Sep 28 07:49:23 www kernel: [<ffffffff8005d229>] tracesys+0x71/0xe0 Sep 28 07:49:23 www kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0 Sep 28 07:49:23 www kernel: Sep 28 07:49:23 www kernel: INFO: task php:29024 blocked for more than 120 seconds. Sep 28 07:49:23 www kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Sep 28 07:49:24 www kernel: php D ffff8101920a0000 0 29024 1 29032 29001 (NOTLB) Sep 28 07:49:26 www kernel: ffff8101cca8fe58 0000000000000086 ffff8101920a0000 ffffffff8000f758 Sep 28 07:49:26 www kernel: ffff81020dfd1408 0000000000000007 ffff81000b64b040 ffff8101e05337e0 Sep 28 07:49:26 www kernel: 00017a552aef9f35 0000000000009513 ffff81000b64b228 0000000180009a22 Sep 28 07:49:27 www kernel: Call Trace: Sep 28 07:49:27 www kernel: [<ffffffff8000f758>] generic_permission+0x52/0xca Sep 28 07:49:27 www kernel: [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b Sep 28 07:49:27 www kernel: [<ffffffff8000cea2>] do_path_lookup+0x294/0x310 Sep 28 07:49:27 www kernel: [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14 Sep 28 07:49:27 www kernel: [<ffffffff8003c618>] do_unlinkat+0x66/0x141 Sep 28 07:49:27 www kernel: [<ffffffff8005d229>] tracesys+0x71/0xe0 Sep 28 07:49:27 www kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0 Sep 28 07:49:27 www kernel: Sep 28 07:49:27 www kernel: INFO: task php:29050 blocked for more than 120 seconds. Sep 28 07:49:28 www kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Sep 28 07:49:28 www kernel: php D ffff810201d95000 0 29050 1 29032 (NOTLB) Sep 28 07:49:28 www kernel: ffff810051e45e58 0000000000000086 ffff810201d95000 ffffffff8000f758 Sep 28 07:49:28 www kernel: ffff81020dfd1408 0000000000000007 ffff81001c23f080 ffff81020f5e2080 Sep 28 07:49:29 www kernel: 00017a5d0bc2aa75 0000000000d0ecfe ffff81001c23f268 0000000280009a22 Sep 28 07:49:29 www kernel: Call Trace: Sep 28 07:49:29 www kernel: [<ffffffff8000f758>] generic_permission+0x52/0xca Sep 28 07:49:29 www kernel: [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b Sep 28 07:49:29 www kernel: [<ffffffff8000cea2>] do_path_lookup+0x294/0x310 Sep 28 07:49:34 www kernel: [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14 Sep 28 07:49:35 www kernel: [<ffffffff8003c618>] do_unlinkat+0x66/0x141 Sep 28 07:49:37 www kernel: [<ffffffff8005d229>] tracesys+0x71/0xe0 Sep 28 07:49:37 www kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0 Sep 28 07:49:37 www kernel: Sep 28 07:49:37 www kernel: INFO: task php:29064 blocked for more than 120 seconds. Sep 28 07:49:37 www kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Sep 28 07:49:37 www kernel: php D ffff81009c231000 0 29064 29057 (NOTLB) Sep 28 07:49:38 www kernel: ffff8100a5dc7e58 0000000000000086 ffff81009c231000 ffffffff8000f758 Sep 28 07:49:38 www kernel: ffff81020dfd1408 0000000000000007 ffff81000a850820 ffff8102038037a0 Sep 28 07:49:38 www kernel: 00017a5bb5c6846e 000000000000861a ffff81000a850a08 0000000080009a22 Sep 28 07:49:38 www kernel: Call Trace: Sep 28 07:49:38 www kernel: [<ffffffff8000f758>] generic_permission+0x52/0xca Sep 28 07:49:38 www kernel: [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b Sep 28 07:49:38 www kernel: [<ffffffff8000cea2>] do_path_lookup+0x294/0x310 Sep 28 07:49:38 www kernel: [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14 Sep 28 07:49:38 www kernel: [<ffffffff8003c618>] do_unlinkat+0x66/0x141 Sep 28 07:49:38 www kernel: [<ffffffff8005d229>] tracesys+0x71/0xe0 Sep 28 07:49:40 www kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0 Sep 28 07:49:42 www kernel: Sep 28 07:49:42 www kernel: INFO: task mysqld:24612 blocked for more than 120 seconds. Sep 28 07:49:43 www kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Sep 28 07:49:46 www kernel: mysqld D ffff81020dfd14c0 0 24612 3266 19643 3599 (NOTLB) Sep 28 07:49:46 www kernel: ffff81019e517c78 0000000000000086 ffff81019e517c88 ffffffff80063002 Sep 28 07:49:47 www kernel: ffff810201966558 0000000000000009 ffff81015fa560c0 ffff8101c263b860 Sep 28 07:49:51 www kernel: 00017a9d113e27fe 0000000000008d5a ffff81015fa562a8 000000018006ec9f Sep 28 07:49:52 www kernel: Call Trace: Sep 28 07:49:52 www kernel: [<ffffffff80063002>] thread_return+0x62/0xfe Sep 28 07:49:52 www kernel: [<ffffffff8005a46a>] getnstimeofday+0x10/0x29 Sep 28 07:49:53 www kernel: [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b Sep 28 07:49:54 www kernel: [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14 Sep 28 07:49:54 www kernel: [<ffffffff8000d0b2>] do_lookup+0x90/0x1e6 Sep 28 07:49:56 www kernel: [<ffffffff8000a2e9>] __link_path_walk+0xa3a/0xfd1 Sep 28 07:50:00 www kernel: [<ffffffff8000eb8e>] link_path_walk+0x45/0xb8 Sep 28 07:50:03 www kernel: [<ffffffff8000cea2>] do_path_lookup+0x294/0x310 Sep 28 07:50:04 www kernel: [<ffffffff800129ad>] getname+0x15b/0x1c2 Sep 28 07:50:06 www kernel: [<ffffffff80023b60>] __user_walk_fd+0x37/0x4c Sep 28 07:50:06 www kernel: [<ffffffff8003f013>] vfs_lstat_fd+0x18/0x47 Sep 28 07:50:08 www kernel: [<ffffffff8002ad91>] sys_newlstat+0x19/0x31 Sep 28 07:50:10 www kernel: [<ffffffff8005d229>] tracesys+0x71/0xe0 Sep 28 07:50:15 www kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0 Sep 28 07:50:19 www kernel: Sep 28 07:50:19 www kernel: INFO: task php:29178 blocked for more than 120 seconds. Sep 28 07:50:23 www kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Sep 28 07:50:23 www kernel: php D 0000000000000003 0 29178 29123 (NOTLB) Sep 28 07:50:23 www kernel: ffff81004a95bdc8 0000000000000086 ffff81020dfd1408 ffffffff80009a22 Sep 28 07:50:24 www kernel: ffffffff800a2fd0 0000000000000007 ffff8101937a4040 ffff81010bde27a0 Sep 28 07:50:26 www kernel: 00017aa3a1d89c9b 000000000000d66e ffff8101937a4228 000000020e42b300 Sep 28 07:50:26 www kernel: Call Trace: Sep 28 07:50:26 www kernel: [<ffffffff80009a22>] __link_path_walk+0x173/0xfd1 Sep 28 07:50:27 www kernel: [<ffffffff800a2fd0>] wake_bit_function+0x0/0x23 Sep 28 07:50:27 www kernel: [<ffffffff8002cc58>] mntput_no_expire+0x19/0x89 Sep 28 07:50:27 www kernel: [<ffffffff8000ebf5>] link_path_walk+0xac/0xb8 Sep 28 07:50:28 www kernel: [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b Sep 28 07:50:32 www kernel: [<ffffffff80023974>] __path_lookup_intent_open+0x56/0x97 Sep 28 07:50:32 www kernel: [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14 Sep 28 07:50:34 www kernel: [<ffffffff8001b260>] open_namei+0xea/0x718 Sep 28 07:50:34 www kernel: [<ffffffff80067235>] do_page_fault+0x4cc/0x842 Sep 28 07:50:35 www kernel: [<ffffffff80027726>] do_filp_open+0x1c/0x38 Sep 28 07:50:35 www kernel: [<ffffffff8001a09c>] do_sys_open+0x44/0xbe Sep 28 07:50:35 www kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0 Sep 28 07:50:35 www kernel: Sep 28 07:56:41 www kernel: proftpd invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0 Sep 28 07:56:41 www kernel: Sep 28 07:56:41 www kernel: Call Trace: Sep 28 07:56:41 www kernel: [<ffffffff800c9f35>] out_of_memory+0x8e/0x2f3 Sep 28 07:56:41 www kernel: [<ffffffff800a2fa2>] autoremove_wake_function+0x0/0x2e Sep 28 07:56:41 www kernel: [<ffffffff8000f67d>] __alloc_pages+0x27f/0x308 Sep 28 07:56:41 www kernel: [<ffffffff80013047>] __do_page_cache_readahead+0x96/0x17b Sep 28 07:56:41 www kernel: [<ffffffff80013984>] filemap_nopage+0x14c/0x360 Sep 28 07:56:41 www kernel: [<ffffffff80008972>] __handle_mm_fault+0x1fd/0x103b Sep 28 07:56:41 www kernel: [<ffffffff800a4fe1>] ktime_get_ts+0x1a/0x4e Sep 28 07:56:41 www kernel: [<ffffffff80067202>] do_page_fault+0x499/0x842 Sep 28 07:56:41 www kernel: [<ffffffff8003ad91>] hrtimer_try_to_cancel+0x4a/0x53 Sep 28 07:58:10 www kernel: [<ffffffff80033541>] do_setitimer+0xd0/0x689 Sep 28 08:26:22 www syslogd 1.4.1: restart. Sep 28 08:26:22 www kernel: klogd 1.4.1, log source = /proc/kmsg started. Sep 28 08:26:22 www kernel: Linux version 2.6.18-274.17.1.el5 ([email protected]) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-51)) #1 SMP Tue Jan 10 17:25:58 EST 2012 Sep 28 08:26:22 www kernel: Command line: ro root=LABEL=/

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  • C#/.NET Little Wonders: ConcurrentBag and BlockingCollection

    - by James Michael Hare
    In the first week of concurrent collections, began with a general introduction and discussed the ConcurrentStack<T> and ConcurrentQueue<T>.  The last post discussed the ConcurrentDictionary<T> .  Finally this week, we shall close with a discussion of the ConcurrentBag<T> and BlockingCollection<T>. For more of the "Little Wonders" posts, see C#/.NET Little Wonders: A Redux. Recap As you'll recall from the previous posts, the original collections were object-based containers that accomplished synchronization through a Synchronized member.  With the advent of .NET 2.0, the original collections were succeeded by the generic collections which are fully type-safe, but eschew automatic synchronization.  With .NET 4.0, a new breed of collections was born in the System.Collections.Concurrent namespace.  Of these, the final concurrent collection we will examine is the ConcurrentBag and a very useful wrapper class called the BlockingCollection. For some excellent information on the performance of the concurrent collections and how they perform compared to a traditional brute-force locking strategy, see this informative whitepaper by the Microsoft Parallel Computing Platform team here. ConcurrentBag<T> – Thread-safe unordered collection. Unlike the other concurrent collections, the ConcurrentBag<T> has no non-concurrent counterpart in the .NET collections libraries.  Items can be added and removed from a bag just like any other collection, but unlike the other collections, the items are not maintained in any order.  This makes the bag handy for those cases when all you care about is that the data be consumed eventually, without regard for order of consumption or even fairness – that is, it’s possible new items could be consumed before older items given the right circumstances for a period of time. So why would you ever want a container that can be unfair?  Well, to look at it another way, you can use a ConcurrentQueue and get the fairness, but it comes at a cost in that the ordering rules and synchronization required to maintain that ordering can affect scalability a bit.  Thus sometimes the bag is great when you want the fastest way to get the next item to process, and don’t care what item it is or how long its been waiting. The way that the ConcurrentBag works is to take advantage of the new ThreadLocal<T> type (new in System.Threading for .NET 4.0) so that each thread using the bag has a list local to just that thread.  This means that adding or removing to a thread-local list requires very low synchronization.  The problem comes in where a thread goes to consume an item but it’s local list is empty.  In this case the bag performs “work-stealing” where it will rob an item from another thread that has items in its list.  This requires a higher level of synchronization which adds a bit of overhead to the take operation. So, as you can imagine, this makes the ConcurrentBag good for situations where each thread both produces and consumes items from the bag, but it would be less-than-idea in situations where some threads are dedicated producers and the other threads are dedicated consumers because the work-stealing synchronization would outweigh the thread-local optimization for a thread taking its own items. Like the other concurrent collections, there are some curiosities to keep in mind: IsEmpty(), Count, ToArray(), and GetEnumerator() lock collection Each of these needs to take a snapshot of whole bag to determine if empty, thus they tend to be more expensive and cause Add() and Take() operations to block. ToArray() and GetEnumerator() are static snapshots Because it is based on a snapshot, will not show subsequent updates after snapshot. Add() is lightweight Since adding to the thread-local list, there is very little overhead on Add. TryTake() is lightweight if items in thread-local list As long as items are in the thread-local list, TryTake() is very lightweight, much more so than ConcurrentStack() and ConcurrentQueue(), however if the local thread list is empty, it must steal work from another thread, which is more expensive. Remember, a bag is not ideal for all situations, it is mainly ideal for situations where a process consumes an item and either decomposes it into more items to be processed, or handles the item partially and places it back to be processed again until some point when it will complete.  The main point is that the bag works best when each thread both takes and adds items. For example, we could create a totally contrived example where perhaps we want to see the largest power of a number before it crosses a certain threshold.  Yes, obviously we could easily do this with a log function, but bare with me while I use this contrived example for simplicity. So let’s say we have a work function that will take a Tuple out of a bag, this Tuple will contain two ints.  The first int is the original number, and the second int is the last multiple of that number.  So we could load our bag with the initial values (let’s say we want to know the last multiple of each of 2, 3, 5, and 7 under 100. 1: var bag = new ConcurrentBag<Tuple<int, int>> 2: { 3: Tuple.Create(2, 1), 4: Tuple.Create(3, 1), 5: Tuple.Create(5, 1), 6: Tuple.Create(7, 1) 7: }; Then we can create a method that given the bag, will take out an item, apply the multiplier again, 1: public static void FindHighestPowerUnder(ConcurrentBag<Tuple<int,int>> bag, int threshold) 2: { 3: Tuple<int,int> pair; 4:  5: // while there are items to take, this will prefer local first, then steal if no local 6: while (bag.TryTake(out pair)) 7: { 8: // look at next power 9: var result = Math.Pow(pair.Item1, pair.Item2 + 1); 10:  11: if (result < threshold) 12: { 13: // if smaller than threshold bump power by 1 14: bag.Add(Tuple.Create(pair.Item1, pair.Item2 + 1)); 15: } 16: else 17: { 18: // otherwise, we're done 19: Console.WriteLine("Highest power of {0} under {3} is {0}^{1} = {2}.", 20: pair.Item1, pair.Item2, Math.Pow(pair.Item1, pair.Item2), threshold); 21: } 22: } 23: } Now that we have this, we can load up this method as an Action into our Tasks and run it: 1: // create array of tasks, start all, wait for all 2: var tasks = new[] 3: { 4: new Task(() => FindHighestPowerUnder(bag, 100)), 5: new Task(() => FindHighestPowerUnder(bag, 100)), 6: }; 7:  8: Array.ForEach(tasks, t => t.Start()); 9:  10: Task.WaitAll(tasks); Totally contrived, I know, but keep in mind the main point!  When you have a thread or task that operates on an item, and then puts it back for further consumption – or decomposes an item into further sub-items to be processed – you should consider a ConcurrentBag as the thread-local lists will allow for quick processing.  However, if you need ordering or if your processes are dedicated producers or consumers, this collection is not ideal.  As with anything, you should performance test as your mileage will vary depending on your situation! BlockingCollection<T> – A producers & consumers pattern collection The BlockingCollection<T> can be treated like a collection in its own right, but in reality it adds a producers and consumers paradigm to any collection that implements the interface IProducerConsumerCollection<T>.  If you don’t specify one at the time of construction, it will use a ConcurrentQueue<T> as its underlying store. If you don’t want to use the ConcurrentQueue, the ConcurrentStack and ConcurrentBag also implement the interface (though ConcurrentDictionary does not).  In addition, you are of course free to create your own implementation of the interface. So, for those who don’t remember the producers and consumers classical computer-science problem, the gist of it is that you have one (or more) processes that are creating items (producers) and one (or more) processes that are consuming these items (consumers).  Now, the crux of the problem is that there is a bin (queue) where the produced items are placed, and typically that bin has a limited size.  Thus if a producer creates an item, but there is no space to store it, it must wait until an item is consumed.  Also if a consumer goes to consume an item and none exists, it must wait until an item is produced. The BlockingCollection makes it trivial to implement any standard producers/consumers process set by providing that “bin” where the items can be produced into and consumed from with the appropriate blocking operations.  In addition, you can specify whether the bin should have a limited size or can be (theoretically) unbounded, and you can specify timeouts on the blocking operations. As far as your choice of “bin”, for the most part the ConcurrentQueue is the right choice because it is fairly light and maximizes fairness by ordering items so that they are consumed in the same order they are produced.  You can use the concurrent bag or stack, of course, but your ordering would be random-ish in the case of the former and LIFO in the case of the latter. So let’s look at some of the methods of note in BlockingCollection: BoundedCapacity returns capacity of the “bin” If the bin is unbounded, the capacity is int.MaxValue. Count returns an internally-kept count of items This makes it O(1), but if you modify underlying collection directly (not recommended) it is unreliable. CompleteAdding() is used to cut off further adds. This sets IsAddingCompleted and begins to wind down consumers once empty. IsAddingCompleted is true when producers are “done”. Once you are done producing, should complete the add process to alert consumers. IsCompleted is true when producers are “done” and “bin” is empty. Once you mark the producers done, and all items removed, this will be true. Add() is a blocking add to collection. If bin is full, will wait till space frees up Take() is a blocking remove from collection. If bin is empty, will wait until item is produced or adding is completed. GetConsumingEnumerable() is used to iterate and consume items. Unlike the standard enumerator, this one consumes the items instead of iteration. TryAdd() attempts add but does not block completely If adding would block, returns false instead, can specify TimeSpan to wait before stopping. TryTake() attempts to take but does not block completely Like TryAdd(), if taking would block, returns false instead, can specify TimeSpan to wait. Note the use of CompleteAdding() to signal the BlockingCollection that nothing else should be added.  This means that any attempts to TryAdd() or Add() after marked completed will throw an InvalidOperationException.  In addition, once adding is complete you can still continue to TryTake() and Take() until the bin is empty, and then Take() will throw the InvalidOperationException and TryTake() will return false. So let’s create a simple program to try this out.  Let’s say that you have one process that will be producing items, but a slower consumer process that handles them.  This gives us a chance to peek inside what happens when the bin is bounded (by default, the bin is NOT bounded). 1: var bin = new BlockingCollection<int>(5); Now, we create a method to produce items: 1: public static void ProduceItems(BlockingCollection<int> bin, int numToProduce) 2: { 3: for (int i = 0; i < numToProduce; i++) 4: { 5: // try for 10 ms to add an item 6: while (!bin.TryAdd(i, TimeSpan.FromMilliseconds(10))) 7: { 8: Console.WriteLine("Bin is full, retrying..."); 9: } 10: } 11:  12: // once done producing, call CompleteAdding() 13: Console.WriteLine("Adding is completed."); 14: bin.CompleteAdding(); 15: } And one to consume them: 1: public static void ConsumeItems(BlockingCollection<int> bin) 2: { 3: // This will only be true if CompleteAdding() was called AND the bin is empty. 4: while (!bin.IsCompleted) 5: { 6: int item; 7:  8: if (!bin.TryTake(out item, TimeSpan.FromMilliseconds(10))) 9: { 10: Console.WriteLine("Bin is empty, retrying..."); 11: } 12: else 13: { 14: Console.WriteLine("Consuming item {0}.", item); 15: Thread.Sleep(TimeSpan.FromMilliseconds(20)); 16: } 17: } 18: } Then we can fire them off: 1: // create one producer and two consumers 2: var tasks = new[] 3: { 4: new Task(() => ProduceItems(bin, 20)), 5: new Task(() => ConsumeItems(bin)), 6: new Task(() => ConsumeItems(bin)), 7: }; 8:  9: Array.ForEach(tasks, t => t.Start()); 10:  11: Task.WaitAll(tasks); Notice that the producer is faster than the consumer, thus it should be hitting a full bin often and displaying the message after it times out on TryAdd(). 1: Consuming item 0. 2: Consuming item 1. 3: Bin is full, retrying... 4: Bin is full, retrying... 5: Consuming item 3. 6: Consuming item 2. 7: Bin is full, retrying... 8: Consuming item 4. 9: Consuming item 5. 10: Bin is full, retrying... 11: Consuming item 6. 12: Consuming item 7. 13: Bin is full, retrying... 14: Consuming item 8. 15: Consuming item 9. 16: Bin is full, retrying... 17: Consuming item 10. 18: Consuming item 11. 19: Bin is full, retrying... 20: Consuming item 12. 21: Consuming item 13. 22: Bin is full, retrying... 23: Bin is full, retrying... 24: Consuming item 14. 25: Adding is completed. 26: Consuming item 15. 27: Consuming item 16. 28: Consuming item 17. 29: Consuming item 19. 30: Consuming item 18. Also notice that once CompleteAdding() is called and the bin is empty, the IsCompleted property returns true, and the consumers will exit. Summary The ConcurrentBag is an interesting collection that can be used to optimize concurrency scenarios where tasks or threads both produce and consume items.  In this way, it will choose to consume its own work if available, and then steal if not.  However, in situations where you want fair consumption or ordering, or in situations where the producers and consumers are distinct processes, the bag is not optimal. The BlockingCollection is a great wrapper around all of the concurrent queue, stack, and bag that allows you to add producer and consumer semantics easily including waiting when the bin is full or empty. That’s the end of my dive into the concurrent collections.  I’d also strongly recommend, once again, you read this excellent Microsoft white paper that goes into much greater detail on the efficiencies you can gain using these collections judiciously (here). Tweet Technorati Tags: C#,.NET,Concurrent Collections,Little Wonders

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  • 26 Days: Countdown to Oracle OpenWorld 2012

    - by Michael Snow
    Welcome to our countdown to Oracle OpenWorld! Oracle OpenWorld 2012 is just around the corner. In less than 26 days, San Francisco will be invaded by an expected 50,000 people from all over the world. Here on the Oracle WebCenter team, we’ve all been working to help make the experience a great one for all our WebCenter customers. For a sneak peak  – we’ll be spending this week giving you a teaser of what to look forward to if you are joining us in San Francisco from September 30th through October 4th. We have Oracle WebCenter sessions covering all topics imaginable. Take a look and use the tools we provide to build out your schedule in advance and reserve your seats in your favorite sessions.  That gives you plenty of time to plan for your week with us in San Francisco. If unfortunately, your boss denied your request to attend - there are still some ways that you can join in the experience virtually On-Demand. This year - we are expanding even more up North of Market Street and will be taking over Union Square as well. Check out this map of San Francisco to get a sense of how much of a footprint Oracle OpenWorld has grown to this year. With so much to see and so many sessions to learn from - its no wonder that people get excited. Add to that a good mix of fun and all of the possible WebCenter sessions you could attend - you won't want to sleep at all to take full advantage of such an opportunity. We'll also have our annual WebCenter Customer Appreciation reception - stay tuned this week for some more info on registration to make sure you'll be able to join us. If you've been following the America's Cup at all and believe in EXTREME PERFORMANCE you'll definitely want to take a look at this video from last year's OpenWorld Keynote. 12.00 Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-family:"Calibri","sans-serif"; mso-ascii- mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi- mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Important OpenWorld Links:  Attendee / Presenters Toolkit Oracle Schedule Builder WebCenter Sessions (listed in the catalog under Fusion Middleware as "Portals, Sites, Content, and Collaboration" ) Oracle Music Festival - AMAZING Line up!!  Oracle Customer Appreciation Night -LOOK HERE!! Oracle OpenWorld LIVE On-Demand Here are all the WebCenter sessions broken down by day for your viewing pleasure. Monday, October 1st CON8885 - Simplify CRM Engagement with Contextual Collaboration Are your sales teams disconnected and disengaged? Do you want a tool for easily connecting expertise across your organization and providing visibility into the complete sales process? Do you want a way to enhance and retain organization knowledge? Oracle Social Network is the answer. Attend this session to learn how to make CRM easy, effective, and efficient for use across virtual sales teams. Also learn how Oracle Social Network can drive sales force collaboration with natural conversations throughout the sales cycle, promote sales team productivity through purposeful social networking without the noise, and build cross-team knowledge by integrating conversations with CRM and other business applications. CON8268 - Oracle WebCenter Strategy: Engaging Your Customers. Empowering Your Business Oracle WebCenter is a user engagement platform for social business, connecting people and information. Attend this session to learn about the Oracle WebCenter strategy, and understand where Oracle is taking the platform to help companies engage customers, empower employees, and enable partners. Business success starts with ensuring that everyone is engaged with the right people and the right information and can access what they need through the channel of their choice—Web, mobile, or social. Are you giving customers, employees, and partners the best-possible experience? Come learn how you can! ¶ HOL10208 - Add Social Capabilities to Your Enterprise Applications Oracle Social Network enables you to add real-time collaboration capabilities into your enterprise applications, so that conversations can happen directly within your business systems. In this hands-on lab, you will try out the Oracle Social Network product to collaborate with other attendees, using real-time conversations with document sharing capabilities. Next you will embed social capabilities into a sample Web-based enterprise application, using embedded UI components. Experts will also write simple REST-based integrations, using the Oracle Social Network API to programmatically create social interactions. ¶ CON8893 - Improve Employee Productivity with Intuitive and Social Work Environments Social technologies have already transformed the ways customers, employees, partners, and suppliers communicate and stay informed. Forward-thinking organizations today need technologies and infrastructures to help them advance to the next level and integrate social activities with business applications to deliver a user experience that simplifies business processes and enterprise application engagement. Attend this session to hear from an innovative Oracle Social Network customer and learn how you can improve productivity with intuitive and social work environments and empower your employees with innovative social tools to enable contextual access to content and dynamic personalization of solutions. ¶ CON8270 - Oracle WebCenter Content Strategy and Vision Oracle WebCenter provides a strategic content infrastructure for managing documents, images, e-mails, and rich media files. With a single repository, organizations can address any content use case, such as accounts payable, HR onboarding, document management, compliance, records management, digital asset management, or Website management. In this session, learn about future plans for how Oracle WebCenter will address new use cases as well as new integrations with Oracle Fusion Middleware and Oracle Applications, leveraging your investments by making your users more productive and error-free. ¶ CON8269 - Oracle WebCenter Sites Strategy and Vision Oracle’s Web experience management solution, Oracle WebCenter Sites, enables organizations to use the online channel to drive customer acquisition and brand loyalty. It helps marketers and business users easily create and manage contextually relevant, social, interactive online experiences across multiple channels on a global scale. In this session, learn about future plans for how Oracle WebCenter Sites will provide you with the tools, capabilities, and integrations you need in order to continue to address your customers’ evolving requirements for engaging online experiences and keep moving your business forward. ¶ CON8896 - Living with SharePoint SharePoint is a popular platform, but it’s not always the best fit for Oracle customers. In this session, you’ll discover the technical and nontechnical limitations and pitfalls of SharePoint and learn about Oracle alternatives for collaboration, portals, enterprise and Web content management, social computing, and application integration. The presentation shows you how to integrate with SharePoint when business or IT requirements dictate and covers cloud-based (Office 365) and on-premises versions of SharePoint. Presented by a former Microsoft director of SharePoint product management and backed by independent customer research, this session will prepare you to answer the question “Why don’t we just use SharePoint for that?’ the next time it comes up in your organization. ¶ CON7843 - Content-Enabling Enterprise Processes with Oracle WebCenter Organizations today continually strive to automate business processes, reduce costs, and improve efficiency. Many business processes are content-intensive and unstructured, requiring ad hoc collaboration, and distributed in nature, requiring many approvals and generating huge volumes of paper. In this session, learn how Oracle and SYSTIME have partnered to help a customer content-enable its enterprise with Oracle WebCenter Content and Oracle WebCenter Imaging 11g and integrate them with Oracle Applications. ¶ CON6114 - Tape Robotics’ Newest Superhero: Now Fueled by Oracle Software For small, midsize, and rapidly growing businesses that want the most energy-efficient, scalable storage infrastructure to meet their rapidly growing data demands, Oracle’s most recent addition to its award-winning tape portfolio leverages several pieces of Oracle software. With Oracle Linux, Oracle WebLogic, and Oracle Fusion Middleware tools, the library achieves a higher level of usability than previous products while offering customers a familiar interface for management, plus ease of use. This session examines the competitive advantages of the tape library and how Oracle software raises customer satisfaction. Learn how the combination of Oracle engineered systems, Oracle Secure Backup, and Oracle’s StorageTek tape libraries provide end-to-end coverage of your data. ¶ CON9437 - Mobile Access Management With more than five billion mobile devices on the planet and an increasing number of users using their own devices to access corporate data and applications, securely extending identity management to mobile devices has become a hot topic. This session focuses on how to extend your existing identity management infrastructure and policies to securely and seamlessly enable mobile user access. CON7815 - Customer Experience Online in Cloud: Oracle WebCenter Sites, Oracle ATG Apps, Oracle Exalogic Oracle WebCenter Sites and Oracle’s ATG product line together can provide a compelling marketing and e-commerce experience. When you couple them with the extreme performance of Oracle Exalogic, you’ll see unmatched scalability that provides you with a true cloud-based solution. In this session, you’ll learn how running Oracle WebCenter Sites and ATG applications on Oracle Exalogic delivers both a private and a public cloud experience. Find out what it takes to get these systems working together and delivering engaging Web experiences. Even if you aren’t considering Oracle Exalogic today, the rich Web experience of Oracle WebCenter, paired with the depth of the ATG product line, can provide your business full support, from merchandising through sale completion. ¶ CON8271 - Oracle WebCenter Portal Strategy and Vision To innovate and keep a competitive edge, organizations need to leverage the power of agile and responsive Web applications. Oracle WebCenter Portal enables you to do just that, by delivering intuitive user experiences for enterprise applications to drive innovation with composite applications and mashups. Attend this session to learn firsthand from customers how Oracle WebCenter Portal extends the value of existing enterprise applications, business processes, and content; delivers a superior business user experience; and maximizes limited IT resources. ¶ CON8880 - The Connected Customer Experience Begins with the Online Channel There’s a lot of talk these days about how to connect the customer journey across various touchpoints—from Websites and e-commerce to call centers and in-store—to provide experiences that are more relevant and engaging and ultimately gain competitive edge. Doing it all at once isn’t a realistic objective, so where do you start? Come to this session, and hear about three steps you can take that can help you begin your journey toward delivering the connected customer experience. You’ll hear how Oracle now has an integrated digital marketing platform for your corporate Website, your e-commerce site, your self-service portal, and your marketing and loyalty campaigns, and you’ll learn what you can do today to begin executing on your customer experience initiatives. ¶ GEN11451 - General Session: Building Mobile Applications with Oracle Cloud With the prevalence of smart mobile devices, companies are facing an increased demand to provide access to data and applications from new channels. However, developing applications for mobile devices poses some unique challenges. Come to this session to learn how Oracle addresses these challenges, offering a simpler way to develop and deploy cross-device mobile applications. See how Oracle Cloud enables you to access applications, data, and services from mobile channels in an easier way.  CON8272 - Oracle Social Network Strategy and Vision One key way of increasing employee productivity is by bringing people, processes, and information together—providing new social capabilities to enable business users to quickly correspond and collaborate on business activities. Oracle WebCenter provides a user engagement platform with social and collaborative technologies to empower business users to focus on their key business processes, applications, and content in the context of their role and process. Attend this session to hear how the latest social capabilities in Oracle Social Network are enabling organizations to transform themselves into social businesses.  --- Tuesday, October 2nd HOL10194 - Enterprise Content Management Simplified: Oracle WebCenter Content’s Next-Generation UI Regardless of the nature of your business, unstructured content underpins many of its daily functions. Whether you are working with traditional presentations, spreadsheets, or text documents—or even with digital assets such as images and multimedia files—your content needs to be accessible and manageable in convenient and intuitive ways to make working with the content easier. Additionally, you need the ability to easily share documents with coworkers to facilitate a collaborative working environment. Come to this session to see how Oracle WebCenter Content’s next-generation user interface helps modern knowledge workers easily manage personal and enterprise documents in a collaborative environment.¶ CON8877 - Develop a Mobile Strategy with Oracle WebCenter: Engage Customers, Employees, and Partners Mobile technology has gone from nice-to-have to a cornerstone of user engagement. Mobile access enables users to have information available at their fingertips, enabling them to take action the moment they make a decision, interact in the moment of convenience, and take advantage of new service offerings in their preferred channels. All your employees have your mobile applications in their pocket; now what are you going to do? It is a critical step for companies to think through what their employees, customers, and partners really need on their devices. Attend this session to see how Oracle WebCenter enables you to better engage your customers, employees, and partners by providing a unified experience across multiple channels. ¶ CON9447 - Enabling Access for Hundreds of Millions of Users How do you grow your business by identifying, authenticating, authorizing, and federating users on the Web, leveraging social identity and the open source OAuth protocol? How do you scale your access management solution to support hundreds of millions of users? With social identity support out of the box, Oracle’s access management solution is also benchmarked for 250-million-user deployment according to real-world customer scenarios. In this session, you will learn about the social identity capability and the 250-million-user benchmark testing of Oracle Access Manager and Oracle Adaptive Access Manager running on Oracle Exalogic and Oracle Exadata. ¶ HOL10207 - Build an Intranet Portal with Oracle WebCenter In this hands-on lab, you’ll work with Oracle WebCenter Portal and Oracle WebCenter Content to build out an enterprise portal that maximizes the productivity of teams and individual contributors. Using browser-based tools, you’ll manage site resources such as page styles, templates, and navigation. You’ll edit content stored in Oracle WebCenter Content directly from your portal. You’ll also experience the latest features that promote collaboration, social networking, and personal productivity. ¶ CON2906 - Get Proactive: Best Practices for Maintaining Oracle Fusion Middleware You chose Oracle Fusion Middleware products to help your organization deliver superior business results. Now learn how to take full advantage of your software with all the great tools, resources, and product updates you’re entitled to through Oracle Support. In this session, Oracle product experts provide proven best practices to help you work more efficiently, plan and prepare for upgrades and patching more effectively, and manage risk. Topics include configuration management tools, remote diagnostics, My Oracle Support Community, and My Oracle Support Lifecycle Advisors. New users and Oracle Fusion Middleware experts alike are guaranteed to leave with fresh ideas and practical, easy-to-implement next steps. ¶ CON8878 - Oracle WebCenter’s Cloud Strategy: From Social and Platform Services to Mashups Cloud computing represents a paradigm shift in how we build applications, automate processes, collaborate, and share and in how we secure our enterprise. Additionally, as you adopt cloud-based services in your organization, it’s likely that you will still have many critical on-premises applications running. With these mixed environments, multiple user interfaces, different security, and multiple datasources and content sources, how do you start evolving your strategy to account for these challenges? Oracle WebCenter offers a complete array of technologies enabling you to solve these challenges and prepare you for the cloud. Attend this session to learn how you can use Oracle WebCenter in the cloud as well as create on-premises and cloud application mash-ups. ¶ CON8901 - Optimize Enterprise Business Processes with Oracle WebCenter and Oracle BPM Do you have business processes that span multiple applications? Are you grappling with how to have visibility across these business processes; how to manage content that is associated with these processes; and, most importantly, how to model and optimize these business processes? Attend this session to hear how Oracle WebCenter and Oracle Business Process Management provide a unique set of integrated solutions to provide a composite application dashboard across these business processes and offer a solution for content-centric business processes. ¶ CON8883 - Deliver Engaging Interfaces to Oracle Applications with Oracle WebCenter Critical business processes live within enterprise applications, and application users need to manage and execute these processes as effectively as possible. Oracle provides a comprehensive user engagement platform to increase user productivity and optimize overall processes within Oracle Applications—Oracle E-Business Suite and Oracle’s Siebel, PeopleSoft, and JD Edwards product families—and third-party applications. Attend this session to learn how you can integrate these applications with Oracle WebCenter to deliver composite application dashboards to your end users—whether they are your customers, partners, or employees—for enhanced usability and Web 2.0–enabled enterprise portals.¶ Wednesday, October 3rd CON8895 - Future-Ready Intranets: How Aramark Re-engineered the Application Landscape There are essential techniques and technologies you can use to deliver employee portals that garner higher productivity, improve business efficiency, and increase user engagement. Attend this session to learn how you can leverage Oracle WebCenter Portal as a user engagement platform for bringing together business process management, enterprise content management, and business intelligence into a highly relevant and integrated experience. Hear how Aramark has leveraged Oracle WebCenter Portal and Oracle WebCenter Content to deliver a unified workspace providing simpler navigation and processing, consolidation of tools, easy access to information, integrated search, and single sign-on. ¶ CON8886 - Content Consolidation: Save Money, Increase Efficiency, and Eliminate Silos Organizations are looking for ways to save money and be more efficient. With content in many different places, it’s difficult to know where to look for a document and whether the document is the most current version. With Oracle WebCenter, content can be consolidated into one best-of-breed repository that is secure, scalable, and integrated with your business processes and applications. Users can find the content they need, where they need it, and ensure that it is the right content. This session covers content challenges that affect your business; content consolidation that can lead to savings in storage and administration costs and can lower risks; and how companies are realizing savings. ¶ CON8911 - Improve Online Experiences for Customers and Partners with Self-Service Portals Are you able to provide your customers and partners an easy-to-use online self-service experience? Are you processing high-volume transactions and struggling with call center bottlenecks or back-end systems that won’t integrate, causing order delays and customer frustration? Are you looking to target content such as product and service offerings to your end users? This session shares approaches to providing targeted delivery as well as strategies and best practices for transforming your business by providing an intuitive user experience for your customers and partners. ¶ CON6156 - Top 10 Ways to Integrate Oracle WebCenter Content This session covers 10 common ways to integrate Oracle WebCenter Content with other enterprise applications and middleware. It discusses out-of-the-box modules that provide expanded features in Oracle WebCenter Content—such as enterprise search, SOA, and BPEL—as well as developer tools you can use to create custom integrations. The presentation also gives guidance on which integration option may work best in your environment. ¶ HOL10207 - Build an Intranet Portal with Oracle WebCenter In this hands-on lab, you’ll work with Oracle WebCenter Portal and Oracle WebCenter Content to build out an enterprise portal that maximizes the productivity of teams and individual contributors. Using browser-based tools, you’ll manage site resources such as page styles, templates, and navigation. You’ll edit content stored in Oracle WebCenter Content directly from your portal. You’ll also experience the latest features that promote collaboration, social networking, and personal productivity. ¶ CON7817 - Migration to Oracle WebCenter Imaging 11g Customers today continually strive to automate business processes, reduce costs, and improve efficiency. The accounts payable process—which is often distributed in nature, requires many approvals, and generates huge volumes of paper invoices—is automated by many customers. In this session, learn how Oracle and SYSTIME have partnered to help a customer migrate its existing Oracle Imaging and Process Management Release 7.6 to the latest Oracle WebCenter Imaging 11g and integrate it with Oracle’s JD Edwards family of products. ¶ CON8910 - How to Engage Customers Across Web, Mobile, and Social Channels Whether on desktops at the office, on tablets at home, or on mobile phones when on the go, today’s customers are always connected. To engage today’s customers, you need to make the online customer experience connected and consistent across a host of devices and multiple channels, including Web, mobile, and social networks. Managing this multichannel environment can result in lots of headaches without the right tools. Attend this session to learn how Oracle WebCenter Sites solves the challenge of multichannel customer engagement. ¶ HOL10206 - Oracle WebCenter Sites 11g: Transforming the Content Contributor Experience Oracle WebCenter Sites 11g makes it easy for marketers and business users to contribute to and manage Websites with the new visual, contextual, and intuitive Web authoring interface. In this hands-on lab, you will create and manage content for a sports-themed Website, using many of the new and enhanced features of the 11g release. ¶ CON8900 - Building Next-Generation Portals: An Interactive Customer Panel Discussion Social and collaborative technologies have changed how people interact, learn, and collaborate, and providing a modern, social Web presence is imperative to remain competitive in today’s market. Can your business benefit from a more collaborative and interactive portal environment for employees, customers, and partners? Attend this session to hear from Oracle WebCenter Portal customers as they share their strategies and best practices for providing users with a modern experience that adapts to their needs and includes personalized access to content in context. The panel also addresses how customers have benefited from creating next-generation portals by migrating from older portal technologies to Oracle WebCenter Portal. ¶ CON9625 - Taking Control of Oracle WebCenter Security Organizations are increasingly looking to extend their Oracle WebCenter portal for social business, to serve external users and provide seamless access to the right information. In particular, many organizations are extending Oracle WebCenter in a business-to-business scenario requiring secure identification and authorization of business partners and their users. This session focuses on how customers are leveraging, securing, and providing access control to Oracle WebCenter portal and mobile solutions. You will learn best practices and hear real-world examples of how to provide flexible and granular access control for Oracle WebCenter deployments, using Oracle Platform Security Services and Oracle Access Management Suite product offerings. ¶ CON8891 - Extending Social into Enterprise Applications and Business Processes Oracle Social Network is an extensible social platform that enables contextual collaboration within enterprise applications and business processes, providing relevant data from across various enterprise systems in one place. Attend this session to see how an Oracle Social Network customer is integrating multiple applications—such as CRM, HCM, and business processes—into Oracle Social Network and Oracle WebCenter to enable individuals and teams to solve complex cross-organizational business problems more effectively by utilizing the social enterprise. ¶ Thursday, October 4th CON8899 - Becoming a Social Business: Stories from the Front Lines of Change What does it really mean to be a social business? How can you change our organization to embrace social approaches? What pitfalls do you need to avoid? In this lively panel discussion, customer and industry thought leaders in social business explore these topics and more as they share their stories of the good, the bad, and the ugly that can happen when embracing social methods and technologies to improve business success. Using moderated questions and open Q&A from the audience, the panel discusses vital topics such as the critical factors for success, the major issues to avoid, how to gain senior executive support for social efforts, how to handle undesired behavior, and how to measure business impact. It takes a thought-provoking look at becoming a social business from the inside. ¶ CON6851 - Oracle WebCenter and Oracle Business Intelligence Enterprise Edition to Create Vendor Portals Large manufacturers of grocery items routinely find themselves depending on the inventory management expertise of their wholesalers and distributors. Inventory costs can be managed more efficiently by the manufacturers if they have better insight into the inventory levels of items carried by their distributors. This creates a unique opportunity for distributors and wholesalers to leverage this knowledge into a revenue-generating subscription service. Oracle Business Intelligence Enterprise Edition and Oracle WebCenter Portal play a key part in enabling creation of business-managed business intelligence portals for vendors. This session discusses one customer that implemented this by leveraging Oracle WebCenter and Oracle Business Intelligence Enterprise Edition. ¶ CON8879 - Provide a Personalized and Consistent Customer Experience in Your Websites and Portals Your customers engage with your company online in different ways throughout their journey—from prospecting by acquiring information on your corporate Website to transacting through self-service applications on your customer portal—and then the cycle begins again when they look for new products and services. Ensuring that the customer experience is consistent and personalized across online properties—from branding and content to interactions and transactions—can be a daunting task. Oracle WebCenter enables you to speak and interact with your customers with one voice across your Websites and portals by providing an integrated platform for delivery of self-service and engagement that unifies and personalizes the online experience. Learn more in this session. ¶ CON8898 - Land Mines, Potholes, and Dirt Roads: Navigating the Way to ECM Nirvana Ten years ago, people were predicting that by this time in history, we’d be some kind of utopian paperless society. As we all know, we’re not there yet, but are we getting closer? What is keeping companies from driving down the road to enterprise content management bliss? Most people understand that using ECM as a central platform enables organizations to expedite document-centric processes, but most business processes in organizations are still heavily paper-based. Many of these processes could be automated and improved with an ECM platform infrastructure. In this panel discussion, you’ll hear from Oracle WebCenter customers that have already solved some of these challenges as they share their strategies for success and roads to avoid along your journey. ¶ CON8908 - Oracle WebCenter Portal: Creating and Using Content Presenter Templates Oracle WebCenter Portal applications use task flows to display and integrate content stored in the Oracle WebCenter Content server. Among the most flexible task flows is Content Presenter, which renders various types of content on an Oracle WebCenter Portal page. Although Oracle WebCenter Portal comes with a set of predefined Content Presenter templates, developers can create their own templates for specific rendering needs. This session shows the lifecycle of developing Content Presenter task flows, including how to create, package, import, modify at runtime, and use such templates. In addition to simple examples with Oracle Application Development Framework (Oracle ADF) UI elements to render the content, it shows how to use other UI technologies, CSS files, and JavaScript libraries. ¶ CON8897 - Using Web Experience Management to Drive Online Marketing Success Every year, the online channel becomes more imperative for driving organizational top-line revenue, but for many companies, mastering how to best market their products and services in a fast-evolving online world with high customer expectations for personalized experiences can be a complex proposition. Come to this panel discussion, and hear directly from online marketers how they are succeeding today by using Web experience management to drive marketing success, using capabilities such as targeting and optimization, user-generated content, mobile site publishing, and site visitor personalization to deliver engaging online experiences. ¶ CON8892 - Oracle’s Journey to Social Business Social business is a revolution, one that is causing rapidly accelerating change in how companies and customers engage with one another and how employees work together. Oracle’s goal in becoming a social business is to create a socially connected organization in which working collaboratively across geographical locations, lines of business, and management chains is second nature, enabling innovative solutions to business challenges. We can achieve this by connecting the right people, finding the right content, communicating with the right people, collaborating at the right time, and building the right communities in the right context—all ready in the CLOUD. Attend this session to see how Oracle is transforming itself into a social business. ¶  ------------ If you've read all the way to the end here - we are REALLY looking forward to seeing you in San Francisco.

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  • Using progress dialog in Visual Studio extensions

    - by Utkarsh Shigihalli
    Originally posted on: http://geekswithblogs.net/onlyutkarsh/archive/2014/05/23/using-progress-dialog-in-visual-studio-extensions.aspxAs a Visual Studio extension developer you are required to keep the aesthetics of Visual Studio in tact when you integrate your extension with Visual Studio. Your extension looks odd when you try to use windows controls and dialogs in your extensions. Visual Studio SDK exposes many interfaces so that your extension looks as integrated with Visual Studio as possible. When your extension is performing a long running task, you have many options to notify the progress to the user. One such option is through Visual Studio status bar. I have previously blogged about displaying progress through Visual Studio status bar. In this blog post I am going to highlight another way using IVsThreadedWaitDialog2 interface. One thing to note is, as the IVsThreadedWaitDialog2 interface name suggests it is a dialog hence user cannot perform any action when the dialog is being shown. So Visual Studio seems responsive to user, even when a task is being performed. Visual Studio itself makes use of this interface heavily. One example is when you are loading a solution (.sln) with lot of projects Visual Studio displays dialog implemented by this interface (screenshot below). So the first step is to get the instance of IVsThreadedWaitDialog2 interface using IServiceProvider interface. var dialogFactory = _serviceProvider.GetService(typeof(SVsThreadedWaitDialogFactory)) as IVsThreadedWaitDialogFactory; IVsThreadedWaitDialog2 dialog = null; if (dialogFactory != null) { dialogFactory.CreateInstance(out dialog); } So if your have the package initialized properly out object dialog will be not null and would contain the instance of IVsThreadedWaitDialog2 interface. Once the instance is got, you call the different methods to manage the dialog. I will cover 3 methods StartWaitDialog, EndWaitDialog and HasCanceled in this blog post. You show the progress dialog as below. if (dialog != null && dialog.StartWaitDialog( "Threaded Wait Dialog", "VS is Busy", "Progress text", null, "Waiting status bar text", 0, false, true) == VSConstants.S_OK) { Thread.Sleep(4000); } As you can see from the method syntax it is very similar to standard windows message box. If you pass true to the 7th parameter to StartWaitDialog method, you will also see a cancel button allowing user to cancel the running task. You can react when user cancels the task as below. bool isCancelled; dialog.HasCanceled(out isCancelled); if (isCancelled) { MessageBox.Show("Cancelled"); } Finally, you can close the dialog when you complete the task running as below. int usercancel; dialog.EndWaitDialog(out usercancel); To help you quickly experience the above code, I have created a sample. It is available for download from GitHub. The sample creates a tool window with two buttons to demo the above explained scenarios. The tool window can be accessed by clicking View –> Other Windows -> ProgressDialogDemo Window

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  • SQL SERVER – BACKUPIO, BACKUPBUFFER – Wait Type – Day 14 of 28

    - by pinaldave
    Backup is the most important task for any database admin. Your data is at risk if you are not performing database backup. Honestly, I have seen many DBAs who know how to take backups but do not know how to restore it. (Sigh!) In this blog post we are going to discuss about one of my real experiences with one of my clients – BACKUPIO. When I started to deal with it, I really had no idea how to fix the issue. However, after fixing it at two places, I think I know why this is happening but at the same time, I am not sure the fix is the best solution. The reality is that the fix is not a solution but a workaround (which is not optimal, but get your things done). From Book On-Line: BACKUPIO Occurs when a backup task is waiting for data, or is waiting for a buffer in which to store data. This type is not typical, except when a task is waiting for a tape mount. BACKUPBUFFER Occurs when a backup task is waiting for data, or is waiting for a buffer in which to store data. This type is not typical, except when a task is waiting for a tape mount. BACKUPIO and BACKUPBUFFER Explanation: This wait stats will occur when you are taking the backup on the tape or any other extremely slow backup system. Reducing BACKUPIO and BACKUPBUFFER wait: In my recent consultancy, backup on tape was very slow probably because the tape system was very old. During the time when I explained this wait type reason in the consultancy, the owners immediately decided to replace the tape drive with an alternate system. They had a small SAN enclosure not being used on side, which they decided to re-purpose. After a week, I had received an email from their DBA, saying that the wait stats have reduced drastically. At another location, my client was using a third party tool (please don’t ask me the name of the tool) to take backup. This tool was compressing the backup along with taking backup. I have had a very good experience with this tool almost all the time except this one sparse experience. When I tried to take backup using the native SQL Server compressed backup, there was a very small value on this wait type and the backup was much faster. However, when I attempted with the third party backup tool, this value was very high again and was taking much more time. The third party tool had many other features but the client was not using these features. We end up using the native SQL Server Compressed backup and it worked very well. If I get to see this higher in my future consultancy, I will try to understand this wait type much more in detail and so probably I would able to come to some solid solution. Read all the post in the Wait Types and Queue series. Note: The information presented here is from my experience and there is no way that I claim it to be accurate. I suggest reading Book OnLine for further clarification. All the discussion of Wait Stats in this blog is generic and varies from system to system. It is recommended that you test this on a development server before implementing it to a production server. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQL Wait Stats, SQL Wait Types, T SQL, Technology

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  • EPM troubleshooting Utilities

    - by THE
    (in via Maurice) "Are you keeping up-to-date with the latest troubleshooting utilities introduced from EPM 11.1.2.2? These are typically not described in product documentation, so you might miss references to them. The following five utilities may be run from the command line.(1) Deployment Report was introduced with EPM 11.1.2.2 (11 April 2012). It details logical web addresses, web servers, application ports, database connections, user directories, database repositories configured for the EPM system, data directories used by EPM system products, instance directories, FMW homes, deployment distory, et cetera. It also helps to keep you honest about whether you made changes to the system and at what times! Download Shared Services patch 13530721 to get the backported functionality in EPM 11.1.2.1. Run it from /Oracle/Middleware/user_projects/epmsystem1/bin/epmsys_registry.sh report deployment (on Unix/Linux)\Oracle\Middleware\user_projects\epmsystem1\bin\epmsys_registry.bat report deployment (on Microsoft Windows). The output is saved under \Oracle\Middleware\user_projects\epmsystem1\diagnostics\reports\deployment_report.html (2) Log Analysis has received more "press". It was released with EPM 11.1.2.3 and helps the user to slice and dice EPM logs. It has many parameters which are documented when run without parameters, when run with the -h parameter, or in the 'Readme' file. It has also been released as a standalone utility for EPM 11.1.2.3 and earlier versions. (Sign in to  My Oracle Support, click the 'Patches & Updates' tab, enter the patch number 17425397, and click the Search button. Download the appropriate platform-specific zip file, unzip, and read the 'Readme' file. Note that you must provide a proper value to a JAVA_HOME environment variable [pointer to the mother directory of the Java /bin subdirectory] in the loganalysis.bat | .sh file and use the -d parameter when running standalone.) Run it from /Oracle/Middleware/user_projects/epmsystem1/bin/loganalysis.sh -h (on Unix/Linux)\Oracle\Middleware\user_projects\epmsystem1\bin\loganalysis.bat -h (on Microsoft Windows). The output is saved under the \Oracle\Middleware\user_projects\epmsystem1\diagnostics\reports\ subdirectory. (3) The Registry Cleanup command may be used (without fear!) to clean up various corruptions which can  affect the Hyperion (database-based) Repository. Run it from /Oracle/Middleware/user_projects/epmsystem1/bin/registry-cleanup.sh (on Unix/Linux)\Oracle\Middleware\user_projects\epmsystem1\bin\registry-cleanup.bat (on Microsoft Windows). The actions are described on the command line. (4) The Remove Instance Command is only used if there are two or more instances configured on one computer and one of those should be deleted. Run it from /Oracle/Middleware/user_projects/epmsystem1/bin/remove-instance.sh (on Unix/Linux)\Oracle\Middleware\user_projects\epmsystem1\bin\remove-instance.bat (on Microsoft Windows). (5) The Reset Configuration Tool was introduced with EPM 11.1.2.2. It nullifies Shared Services Hyperion Registry settings so that a service may be reconfigured. You may locate the values to substitute for <product> or <task> by scanning registry.html (generated by running epmsys_registry.bat | .sh). Find productNAME in INSTANCE_TASKS_CONFIGURATION and SYSTEM_TASKS_CONFIGURATION nodes and identify tasks by property pairs that have values of 'Configurated' or 'Pending'. Run it from /Oracle/Middleware/user_projects/epmsystem1/bin/resetConfigTask.sh -product <product> -task <task> (on Unix/Linux)\Oracle\Middleware\user_projects\epmsystem1\bin\resetConfigTask.bat -product <product> -task <task> (on Microsoft Windows). "Thanks to Maurice for this collection of utilities.

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  • Converting to flash video

    - by Shadow
    I'm trying to convert a .dv video from a camcorder to flash video to show on my organization's website. I'm having issues using VLC (the file ends up empty or not compressed, depending on different options), so I either need help with VLC or other recommendations. If you're recommending software, it absolutely must be free. (My organization is non-profit) Thanks

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  • Software firewall used in network

    - by user45019
    Hi, I have a medium sized organization with users between 300-500 users. I am looking for software firewall for this type orgnization. Which type of software do you guys prefer, am not looking for hardware firewall...Can u suggest me some names of software firewall for this kind of organization. thanks, Gary

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  • What Counts For a DBA – Depth

    - by Louis Davidson
    SQL Server offers very simple interfaces to many of its features. Most people could open up SSMS, connect to a server, write a simple query and see the results. Even several of the core DBA tasks are deceptively straightforward. It doesn’t take a rocket scientist to perform a basic database backup or run a trace (even using the newfangled Extended Events!). However, appearances can be deceptive, and often times it is really important that a DBA understands not just the basics of how to perform a task, but why we do a task, and how that task works. As an analogy, consider a child walking into a darkened room. Most would know that they need to turn on the light, and how to do it, so they flick the switch. But what happens if light fails to shine forth. Most would immediately tell you that you need to consider changing the light bulb. So you hop in the car and take them to the local home store and instruct them to buy a replacement. Confronted with a 40 foot display of light bulbs, how will they decide which of the hundreds of types of bulbs, of different types, fittings, shapes, colors, power and efficiency ratings, is the right choice? Obviously the main lesson the child is going to learn this day is how to use their cell phone as a flashlight so they don’t have to ask for help the next time. Likewise, when the metaphorical toddlers who use your database server have issues, they will instinctively know something is wrong, and may even have some idea what caused it, but will have no depth of knowledge to figure out the right solution. That is where the DBA comes in and attempts to save the day. However, when one looks beneath the shiny UI, SQL Server has its own “40 foot display of light bulbs”, in the form of the tremendous number of tools and the often-bewildering amount of information they can present to the DBA, to help us find issues. Unfortunately, resorting to guesswork, to trying different “bulbs” over and over, hoping to stumble on the answer. This is where the right depth of knowledge goes a long way. If we need to write a SELECT statement, then knowing the syntax and where to find the data is not enough. Knowledge of indexes and query plans is essential. Without it, we might hit on a query that “works”, but we are basically still a user, not a programmer, because we have no real control over our platform. Is that level of knowledge deep enough? Probably not, since knowledge of the underlying metadata and structures would be very useful in helping us make sense of any query plan. Understanding the structure of an index makes the “key lookup” operator not sound like what you do when someone tapes your car key to the ceiling. So is even this level of understanding deep enough? Do we need to understand the memory architecture used to process the query? It might be a comforting level of knowledge, and will doubtless come in handy at some point, but is not strictly necessary in most cases. Beyond that lies (more or less) full knowledge of SQL language and the intricacies of every step the SQL Server engine takes to process our query. My personal theory is that, as a professional, our knowledge of a given task should extend, at a minimum, one level deeper than is strictly necessary to perform the task. Anything deeper can be left to the ridiculously smart, or obsessive, or both. As an example. tasked with storing an integer value between 0 and 99999999, it’s essential that I know that choosing an Integer over Decimal(8,0) will likely offer performance benefits. It is then useful that I also understand the value of adding a CHECK constraint, to make sure the values are valid to the desired range; and comforting that I know a little about the underlying processors, registers and computer math. Anything further, I leave to the likes of Joe Chang, whose recent blog post on the topic offers depth by the bucketful!  

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  • MSBuild: convert relative path in imported project to absolute path.

    - by Ergwun
    Short version: I have an MSBuild project that imports another project. There is a property holding a relative path in the imported project that is relative to the location of the imported project. How do I convert this relative path to be absolute? I've tried the ConvertToAbsolutePath task, but this makes it relative to the importing project's location). Long version: I'm trying out Robert Koritnik's MSBuild task for integrating nunit output into Visual Studio (see this other SO question for a link). Since I like to have all my tools under version control, I want the target file with the custom task in it to point to the nunit console application using a relative path. My problem is that this relative path ends up being made relative to the importing project. E.g. (in ... MyRepository\Third Party\NUnit\MSBuild.NUnit.Task.Source\bin\Release\MSBuild.NUnit.Task.Targets): ... <PropertyGroup Condition="'$(NUnitConsoleToolPath)' == ''"> <NUnitConsoleToolPath>..\..\..\NUnit 2.5.5\bin\net-2.0</> </PropertyGroup> ... <Target Name="IntegratedTest"> <NUnitIntegrated TreatFailedTestsAsErrors="$(NUnitTreatFailedTestsAsErrors)" AssemblyName="$(AssemblyName)" OutputPath="$(OutputPath)" ConsoleToolPath="$(NUnitConsoleToolPath)" ConsoleTool="$(NUnitConsoleTool)" /> </Target> ... The above target fails with the error that the file cannot be found (that is the nunit-console.exe file). Inside the NUnitIntegrated MSBuild task, when the the execute() method is called, the current directory is the directory of the importing project, so relative paths will point to the wrong location. I tried to convert the relative path to absolute by adding these tasks to the IntegratedTest target: <ConvertToAbsolutePath Paths="$(NUnitConsoleToolPath)"> <Output TaskParameter="AbsolutePaths" PropertyName="AbsoluteNUnitConsoleToolPath"/> </ConvertToAbsolutePath> but this just converted it to be relative to the directory of the project file that imports this target file. I know I can use the property $(MSBuildProjectDirectory) to get the directory of the importing project, but can't find any equivalent for directory of the imported target file. Can anyone tell me how a path in an imported file that is supposed to be relative to the directory that the imported file is in can be made absolute? Thanks!

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  • ProgressDialog not working in external AsyncTask

    - by eric
    I'm beginning to think that to get a ProgressDialog to work the AsyncTask has to be an inner class within an Activity class. True? I have an activity the uses a database to manipulate information. If the database is populated all is well. If it is not populated then I need to download information from a website, populate the database, then access the populated database to complete the Views in onCreate. Problem is without some means to determine when the AsyncTask thread has finished populating the database, I get the following Force Close error message: Sorry! The application has stopped unexpectedly. I click on the Force Close button, the background AsyncTask thread continues to work, the database gets populated, and everything works ok. I need to get rid of that error message and need some help on how to do this. Here's some psuedo code: public class ViewStuff extends Activity { onCreate { if(database is populated) do_stuff else { FillDB task = null; if(task == null || task.getStatus().equals(AsyncTask.Status.FINISHED)) { task = new FillDB(context); task.execute(null); } } continue with onCreate using information from database to properly display } // end onCreate } // end class In a separate file: public class FillDB extends AsyncTask<Void, Void, Void> { private Context context; public FillDB (Context c) //pass the context in the constructor { context = c; } public void filldb () { doInBackground(); } @Override protected void onPreExecute() { ProgressDialog progressDialog = new ProgressDialog(context); //crashes with the following line progressDialog.show(context, "Working..", "Retrieving info"); } @Override protected Void doInBackground(Void... params) { // TODO Auto-generated method stub try etc etc etc } } What am I doing wrong?

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  • AjaxMin4 bug with Visual Studio 2010 RC?

    - by KevinUK
    When I compile my solution I get 2 errors which I did not get with version of 1.1 of AjaxMin. The "SourceFiles" parameter is not supported by the "AjaxMin" task. Verify the parameter exists on the task, and it is a settable public instance property. The "AjaxMin" task could not be initialized with its input parameters. If I re-install AjaxMin4 then reload VS it works again until I reboot the PC. Is this a known issue and is there a fix?

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  • What is better: set up underestimated or overestimated deadlines?

    - by sergdev
    Suppose you are a project manager. You can estimate an effort in days for specific task for specific developer. After performing estimation you obtain some min and max values. After this you delegate a task to developer. Actually you also set up deadline. Which estimation is better to use when set up deadline: min or max? As I see min estimation can result in stress for developer, max estimation can result in using all the time which is allocated to developer even if task can be complete faster (so called Student syndrome). Which other pros and cons of two approaches? Small clarification: I speak about setting up deadlines for subordinates when delegating the task, NOT for reporting to my boss.

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  • Why I am not able to display image using swing worker?

    - by Vimal Basdeo
    I was trying some codes to implement a scheduled task and came up with these codes . import java.util.*; class Task extends TimerTask { int count = 1; // run is a abstract method that defines task performed at scheduled time. public void run() { System.out.println(count+" : Mahendra Singh"); count++; } } class TaskScheduling { public static void main(String[] args) { Timer timer = new Timer(); // Schedule to run after every 3 second(3000 millisecond) timer.schedule( new Task(), 3000); } } My output : 1 : Mahendra Singh I expected the compiler to print a series of Mahendra Singh at periodic interval of 3 s but despite waiting for around 15 minutes, I get only one output...How do I solve this out?

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  • How to reflect in the database a new belongs_to and has_many relationship in Ruby on Rails

    - by Ken I.
    I am new to rails (usually a python guy) and have just been trying to build a simple task manager application for fun. I am using Devise for authentication and have a single Task object I am trying to relate to a user. I have added the following to the Task model: class Task < ActiveRecord::Base belongs_to :user end and I have added the following in my User model for Devise: class User < ActiveRecord::Base has_many :dreams <<normal Devise stuff>> end Whenever I added this information I then ran: rake db:migrate. It then gave me an error that the database field did not exist for user_id when I tried to do anything with it. I am sure it is something rather simple that I am missing. Thanks for the help.

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  • What is "UseRANU" parameter in Visual Studio

    - by sudarsanyes
    I have created a package in VS2010 RC using the MPF (Managed Package Framework) and I get the following error. Can somebody help me out with this ?? The "UseRANU" parameter is not supported by the "VsTemplatePaths" task. Verify the parameter exists on the task, and it is a settable public instance property. The "VsTemplatePaths" task could not be initialized with its input parameters.

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  • BackgroundWorker From ASP.Net Application

    - by Kevin
    We have an ASP.Net application that provides administrators to work with and perform operations on large sets of records. For example, we have a "Polish Data" task that an administrator can perform to clean up data for a record (e.g. reformat phone numbers, social security numbers, etc.) When performed on a small number of records, the task completes relatively quickly. However, when a user performs the task on a larger set of records, the task may take several minutes or longer to complete. So, we want to implement these kinds of tasks using some kind of asynchronous pattern. For example, we want to be able to launch the task, and then use AJAX polling to provide a progress bar and status information. I have been looking into using the BackgroundWorker class, but I have read some things online that make me pause. I would love to get some additional advice on this. For example, I understand that the BackgroundWorker will actually use the thread pool from the current application. In my case, the application is an ASP.Net web site. I have read that this can be a problem because when the application recycles, the background workers will be terminated. Some of the jobs I mentioned above may take 3 minutes, but others may take a few hours. Also, we may have several hundred administrators all performing similar operations during the day. Will the ASP.Net application thread pool be able to handle all of these background jobs efficiently while still performing it's normal request processing? So, I am trying to determine if using the BackgroundWorker class and approach is right for our needs. Should I be looking at an alternative approach? Thanks and sorry for such a long post! Kevin

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  • libclntsh.so.11.1: cannot open shared object file.

    - by zhangzhong
    I want to schedule a task on linux by icrontab, and the task is written in python and have to import cx_Oracle module, so I export ORACLE_HOME and LD_LIBRARY_PATH in .bash_profile, but it raise the error: libclntsh.so.11.1: cannot open shared object file. Since it is ok to run the task by issue the command in shell like python a.py # ok I change the task in icrontab into a shell script which invoke my python script, but the exception recurred? # the shell script scheduled in icrontab #! bash python a.py Could you help how to do with it?

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  • MSDN Example of handling an exception from the TPL - Is this a race condition?

    - by David
    I'm looking at the TPL exception handling example from MSDN @ http://msdn.microsoft.com/en-us/library/dd537614(v=VS.100).aspx The basic form of the code is: Task task1 = Task.Factory.StartNew(() => { throw new IndexOutOfRangeException(); }); try { task1.Wait(); } catch (AggregateException ae) { throw ae.Flatten(); } My question is: Is this a race condition? What happens if task1 throws before the try has executed? Am I missing something that stops this being a race? Shouldn't it be written like this instead: try { Task task1 = Task.Factory.StartNew(() => { throw new IndexOutOfRangeException(); }); task1.Wait(); } catch (AggregateException ae) { throw ae.Flatten(); }

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  • WPF Enable/Disabled controls from a page placed inside main window application

    - by toni
    Hi! I have an WPF application that has a main window. In the left side of this Window there are some buttons into a listbox, it is a kind of menu to access faster to pages. These buttons belongs to pages that they are loaded inside the window when the user selects one. Main window also has another main menu in the top for doing other tasks. When a page is loaded in the main window and the user clicks a button of this currently loaded page, it starts a task that takes a long time. While this long task is executing I want the user can not select (or press) any of the buttons into the listbox because In the loaded page the long task also is updating the UI for this page. I would like to disabled (isEnabled=false) the listbox when long task is executing and not to enabled it until the long task has finished. How can I do this? I mean, from the page is currently loaded I want to disabled the listbox placed in the main window that is the owner. The listbox doesn't belong to the currently loaded page. Thanks!

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  • Android application transparency and window sizing at root level

    - by ajoburg
    Is it possible to create an application with a transparent background on the root task such that you can see the task running beneath it when it is part of a separate stack? Alternatively, is it possible to run an application so the window of the root task is only a portion of the screen instead of the whole screen? I understand how the transparency and window sizing is done with activities that are not the root task and this works fine. However, the root task of an activity seems to always fill the whole screen and be black even when a transparent theme is applied to the application object in the manifest file. ApplicationManifest.xml: <application android:icon="@drawable/icon" android:label="@string/app_name" android:debuggable="true" android:theme="@style/Theme.Transparent"> Styles.xml <resources> <style name="Theme.Transparent"> <item name="android:windowIsTranslucent">true</item> <item name="android:windowNoTitle">true</item> <item name="android:windowBackground">@drawable/ transparent_background</item> <item name="android:windowAnimationStyle">@android:style/ Animation.Translucent</item> <item name="android:colorForeground">#fff</item> <item name="android:windowIsFloating">true</item> <item name="android:gravity">bottom</item> </style> </resources> Colors.xml <resources> <drawable name="transparent_background">#00000000</drawable> </resources>

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  • Custom Java ListCellRenderer - Can't click JCheckBox

    - by Spencer
    Made a custom ListCellRenderer: import java.awt.Component; import javax.swing.JCheckBox; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JPanel; import javax.swing.ListCellRenderer; /** * * @author Spencer */ public class TaskRenderer implements ListCellRenderer { private Task task; private JPanel panel = new JPanel(); private JCheckBox checkbox = new JCheckBox(); private JLabel label = new JLabel(); public TaskRenderer() { panel.add(checkbox); panel.add(label); } public Component getListCellRendererComponent( JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) { task = (Task) value; label.setText(task.getName()); return panel; } } Have a JList with each cell in it rendered using the above class, but the checkboxes in the panels for each cell cannot be clicked. Thought it had to do with it not getting focus. Any ideas? Thanks, Spencer

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  • What is the impact of Thread.Sleep(1) in C#?

    - by Justin Tanner
    In a windows form application what is the impact of calling Thread.Sleep(1) as illustrated in the following code: public Constructor() { Thread thread = new Thread(Task); thread.IsBackground = true; thread.Start(); } private void Task() { while (true) { // do something Thread.Sleep(1); } } Will this thread hog all of the available CPU? What profiling techniques can I use to measure this Thread's CPU usage ( other than task manager )?

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  • Handling Exceptions for ThreadPoolExecutor

    - by HonorGod
    I have the following code snippet that basically scans through the list of task that needs to be executed and each task is then given to the executor for execution. The JobExecutor intern creates another executor (for doing db stuff...reading and writing data to queue) and completes the task. JobExecutor returns a Future for the tasks submitted. When one of the task fails, I want to gracefully interrupt all the threads and shutdown the executor by catching all the exceptions. What changes do I need to do? public class DataMovingClass { private static final AtomicInteger uniqueId = new AtomicInteger(0); private static final ThreadLocal<Integer> uniqueNumber = new IDGenerator(); ThreadPoolExecutor threadPoolExecutor = null ; private List<Source> sources = new ArrayList<Source>(); private static class IDGenerator extends ThreadLocal<Integer> { @Override public Integer get() { return uniqueId.incrementAndGet(); } } public void init(){ // load sources list } public boolean execute() { boolean succcess = true ; threadPoolExecutor = new ThreadPoolExecutor(10,10, 10, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(1024), new ThreadFactory() { public Thread newThread(Runnable r) { Thread t = new Thread(r); t.setName("DataMigration-" + uniqueNumber.get()); return t; }// End method }, new ThreadPoolExecutor.CallerRunsPolicy()); List<Future<Boolean>> result = new ArrayList<Future<Boolean>>(); for (Source source : sources) { result.add(threadPoolExecutor.submit(new JobExecutor(source))); } for (Future<Boolean> jobDone : result) { try { if (!jobDone.get(100000, TimeUnit.SECONDS) && success) { // in case of successful DbWriterClass, we don't need to change // it. success = false; } } catch (Exception ex) { // handle exceptions } } } public class JobExecutor implements Callable<Boolean> { private ThreadPoolExecutor threadPoolExecutor ; Source jobSource ; public SourceJobExecutor(Source source) { this.jobSource = source; threadPoolExecutor = new ThreadPoolExecutor(10,10,10, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(1024), new ThreadFactory() { public Thread newThread(Runnable r) { Thread t = new Thread(r); t.setName("Job Executor-" + uniqueNumber.get()); return t; }// End method }, new ThreadPoolExecutor.CallerRunsPolicy()); } public Boolean call() throws Exception { boolean status = true ; System.out.println("Starting Job = " + jobSource.getName()); try { // do the specified task ; }catch (InterruptedException intrEx) { logger.warn("InterruptedException", intrEx); status = false ; } catch(Exception e) { logger.fatal("Exception occurred while executing task "+jobSource.getName(),e); status = false ; } System.out.println("Ending Job = " + jobSource.getName()); return status ; } } }

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