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  • Network and Server Management Tools

    - by jessieE
    We are building a farm of test servers. Currently we have 8 servers. We are planning to use the servers to test the following Mysql Cluster Xen or KVM virtualization Heartbeat/Pacemaker/DRDB What tools do experienced sysads use for: Initial installation of operating system( installing centos 5 or ubuntu server manually 8 times seems like a tedious task that just begs for automation) Centralized Configuration Management and Software Updates for Host and possibly Guest(virtualized) servers Hardware, Services and Network Monitoring

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  • Advice on where to install Redis

    - by redsquare
    I have just introduced Redis into our application and I am not sure where best to install in production. I read that the Windows option is not production quality so i need to install on Linux. I currently have 5 redhat boxes and cannot get any more provisioned at this current time. These consist of Active/Passive HaProxy load balancer and a cluster of three RabbitMQ boxes. Where would you install an Active/Passive redis instances?

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  • High availability for databases (DRBD + GFS)?

    - by EvanAlm
    Does it work to have like an MySQL (or any other relational database) on the GFS (with DRBD) and have multiple nodes reading and writing to it? Is that the "best" way of providing a HA database/application setup if so? Is RHEL (cluster suite) a good way to set up this? (or centos)

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  • Unable to uninstall SQL 2008 Instance(s)

    - by ichoudhury
    Windows 2008 R2 High Availability Cluster and we were just going through the first phase of configuration. Somebody accidentally loaded the instance incorrectly, so I was hopping to uninstall and reinstall. But when I approach the uninstall process, it fails with the following msg: Object reference not set to an instance of an object SQL instance not yet clustered (FYI) Any idea?

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  • Does changing the default HDFS replication factor from 3 affect mapper performance?

    - by liamf
    Have a HDFS/Hadoop cluster setup and am looking into tuning. I wonder if changing the default HDFS replication factor (default:3) to something bigger will improve mapper performance, at the obvious expense of increasing disk storage used? My reasoning being that if the data is already replicated to more nodes, mapper jobs can be run on more nodes in parallel without any data streaming/copying? Anyone got any opinions?

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  • Switch User in RedHat like XP

    - by rd42
    In our cluster, RedHat4 & 5 machines, if someone locks the computer and walks away no body can use it. Is there a feature in RedHat5, Gnome, KDE etc that would allow for the option of switching users at the lock screen, so more than one person can be logged in? Thanks, rd42

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  • Group your tabs feature Firefox: Automatically sort by domain?

    - by Dan
    I'm using Firefox 8.0 and am enjoying the Group your tabs feature: But I'm not always good at keeping it organized. I'm trying to find a way to automatically put certain domains in certain groups. Probably through a plug-in? All the tab related plug-ins just help cluster your tabs together and don't actually work with the "Group your tabs" feature (which is why I posted the picture, to avoid ambiguity, since grouping tabs can refer to a lot of things).

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  • High CPU usage - symptoms moving from server to server after bouncing

    - by grt3kl
    First off, I apologize if I didn't include enough information to properly troubleshoot this issue. This sort of thing isn't my specialty, so it is a learning process. If there's something I need to provide, please let me know and I'll be happy to do what I can. The images associated with my question are at the bottom of this post. We are dealing with a clustered environment of four WebLogic 9.2 Java application servers. The cluster utilizes a round-robin load algorithm. Other details include: Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_12-b04) BEA JRockit(R) (build R27.4.0-90_CR352234-91983-1.5.0_12-20071115-1605-linux-x86_64, compiled mode) Basically, I started looking at the servers' performance because our customers are seeing lots of lag at various times of the day. Our servers should easily handle the loads they are given, so it's not clear what's going on. Using HP Performance Manager, I generated some graphs that indicate that the CPU usage is completely out of whack. It seems that, at any given point, one or more of the servers has a CPU utilization of over 50%. I know this isn't particularly high, but I would say it is a red flag based on the CPU utilization of the other servers in the WebLogic cluster. Interesting things to note: The high CPU utilization was occurring only on server02 for several weeks. The server crashed (extremely rare; we are not sure if it's related to this) and upon starting it back up, the CPU utilization was normal on all 4 servers. We restarted all 4 managed servers and the application server (on server01) yesterday, on 2/28. As you can see, server03 and server04 picked up the behavior that was seen on server02 before. The CPU utilization is a Java process owned by the application user (appown). The number of transactions is consistent across all servers. It doesn't seem like any one server is actually handling more than another. If anyone has any ideas or can at least point me in the right direction, that would be great. Again, please let me know if there is any additional information I should post. Thanks!

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  • Multicast Prblem in Linux Red Hat server

    - by Uma Kant Verma
    I am facing a very strange behavior on my server. I am using a linux cluster.On fail over server my broadcast application halts after 5 minutes.But it is working fine on Primary server. My application process listening on port and send broadcast.It is working 5 mins after that it wait on socket for further packets but it didn't receive anything. Same process is working fine at Primary server. Plz help me.

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  • Benefits to private networks between virtual machines on an ESXi host?

    - by arex1337
    I'm planning this development environment with a few database servers, and originally thought I would have a few private networks. I then thought it might be unnecessary as the ESXi cluster already provides redundancy with 4 NICs (in my case) and should manage the network traffic pretty intelligently, right? Two private networks Zero private networks What are the advantages/disadvantages between the two shown configurations - on an ESXi 4.1 host?

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  • problem installing netbeans on freeBSD

    - by solomon
    hi guys, I want to install netbeans on my freeBSD7.2 machine.I followed the instructions listed in http://typo.submonkey.net/articles/2007/7/13/netbeans-on-freebsd But, when i try the third step, which is running the netbeans using "./netbeans/bin/netbeans" i found the following error "etc/netbeans.cluster" file cann't be found. What do u think could be the reason. I can't figure it out, plz help me. Thanx in advance

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  • Moving Sharepoint 2003 databases to a new SQL Server

    - by GardenMWM
    Recently we completed a new MSSQL cluster that we are planning on migrating all existing SQL databases to. This includes our Sharepoint databases, while looking into moving the databases I found the Microsoft documentation for moving Sharepoint 2007, however have not been able to find anything similar for Sharepoint 2003. Can anyone point me to a guide for moving the databases, or provide some tips, instructions or warnings? Thanks

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  • How many Tomcat instances can one application server handle?

    - by NetworkUser
    My network engineer states I am part of a cluster where two apache application servers(512G RAM each) have 142 instances each of Tomcat (of which my company represents 6 each with 2G RAM). This seems like a lot and my latency issues move with the hour of the day - 7AM CST software functions fine, 10AM CST - system slows significantly this slowness continues until 6PM CST. My question is how many Tomcat instances can one application server handle?

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  • How to quickly remove hundreds of thousands of files? [closed]

    - by Nick
    Possible Duplicate: Doing an rm -rf on a massive directory tree takes hours I'm running a simulation program on a computing cluster (Scientific Linux) that generates hundreds of thousands of atomic coordinate files. But I'm having a problem deleting the files because rm -rf never completes and neither does find . -name * | xargs r Isn't there a way to just unlink this directory from the directory tree? The storage unit is used by hundreds of other people, so reformatting is not an option. Thanks

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  • What "Drained" mean in this llstatus result?

    - by xslittlegrass
    I'm trying to run jobs on the cluster of our university, and I come across this result when I trying to see the status of the cluster: llstatus Name Schedd InQ Act Startd Run LdAvg Idle Arch OpSys pandora001 Down 0 0 Run 29 41.04 9999 POWER7 AIX61 pandora002 Down 0 0 Busy 32 32.06 9999 POWER7 AIX61 pandora003 Down 0 0 Drned 0 0.03 9999 POWER7 AIX61 pandora004 Down 0 0 Busy 32 32.07 9999 POWER7 AIX61 pandora005 Down 0 0 Busy 32 32.02 9999 POWER7 AIX61 pandora006 Down 0 0 Busy 32 34.01 9999 POWER7 AIX61 pandora007 Down 0 0 Busy 32 32.02 9999 POWER7 AIX61 pandora008 Down 0 0 Drned 0 0.00 9999 POWER7 AIX61 pandora1 Avail 15 5 Idle 0 0.00 86 POWER7 AIX61 llstatus -R Machine Consumable Resource(Available, Total) ------------------------------ ------------------------------------------------- pandora001 ConsumableCpus< 28-31 >< 0-31 > ConsumableMemory(28.297 gb,124.000 gb)+ pandora002 ConsumableCpus< >< 0-31 > ConsumableMemory(14.625 gb,124.000 gb)+ pandora003 ConsumableCpus< 0-31 >< 0-31 > ConsumableMemory(124.000 gb,124.000 gb)+ pandora004 ConsumableCpus< >< 0-31 > ConsumableMemory(28.000 gb,124.000 gb)+ pandora005 ConsumableCpus< >< 0-31 > ConsumableMemory(28.000 gb,124.000 gb)+ pandora006 ConsumableCpus< >< 0-31 > ConsumableMemory(14.625 gb,124.000 gb)+ pandora007 ConsumableCpus< >< 0-31 > ConsumableMemory(5.250 gb,124.000 gb)+ pandora008 ConsumableCpus< 0-31 >< 0-31 > ConsumableMemory(124.000 gb,124.000 gb)+ pandora1 ConsumableCpus< 0-7 >< 0-7 > ConsumableMemory(32.000 gb,32.000 gb) It seems that the pandora003 and pandora008 are in the status of "Drned". What does that mean? Why I can't use the resources of at thoes nodes? Thanks.

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  • SQL Server Redirection

    - by MrTehee
    We are switching from a SQL cluster to a mirrored solution. The problem is that we have a bunch of programs that would have to switch connection strings to handle the failover. Is there any way the we can set up a redirect or proxy that would take any legacy requests and forward them to the mirrored solution?

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  • Hello it’s your server calling

    - by GrumpyOldDBA
    This is nothing exciting but I've always found this startup procedure  very useful. All this simple procedure does is send you an email if the SQL Service Starts. If your Server is a cluster it will tell you which node you're on. -- On it's own this procedure can't actually be used as I route the output through another procedure, dbasp_SendMessage, this procedure routes a passed message to either a smtp email or a log table or both, the destination is set in a server config table...(read more)

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  • Microsoft Windows HPC Server R2 Beta2

    - by Daniel Moth
    Internally and unofficially we refer to this as "HPC Server v3" and its Beta2 became available last week. Read the full story on this blog post from Ryan and this one from Don. There has been a lot of excitement on the web for this release with coverage from last Wednesday here, here, here, here, here and here. Don't forget that Visual Studio 2010 makes it easy to develop for HPC Server including the MPI Cluster Debugger integration that I explained here and here. Comments about this post welcome at the original blog.

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  • Microsoft Windows HPC Server R2 Beta2

    Internally and unofficially we refer to this as "HPC Server v3" and its Beta2 became available last week. Read the full story on this blog post from Ryan and this one from Don. There has been a lot of excitement on the web for this release with coverage from last Wednesday here, here, here, here, here and here. Don't forget that Visual Studio 2010 makes it easy to develop for HPC Server including the MPI Cluster Debugger integration that I explained here and here. Comments about this...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Visual History for Chrome Maps Out Your Browser History in an Interactive Graph

    - by Jason Fitzpatrick
    Curious how your adventures on the web interweave? Visual History for Chrome maps out related web sites in your browsing history into an interactive chart–visualize your browsing over the last hours, days, or months. One of the interesting elements of Visual History is that it doesn’t simply link sites together via activated hyperlinks but by consecutive use within 20 minute increments–thus if you frequently hit up Gmail, Facebook, and Reddit first thing in the morning, they’ll all appear together in a usage cluster. Site can be organized by URL, sub-domain, or domain. Visual History is free, Chrome only. Visual History for Chrome [Chrome Web Store] HTG Explains: What The Windows Event Viewer Is and How You Can Use It HTG Explains: How Windows Uses The Task Scheduler for System Tasks HTG Explains: Why Do Hard Drives Show the Wrong Capacity in Windows?

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  • Oracle Enterprise Data Quality: Ever Integration-ready

    - by Mala Narasimharajan
    It is closing in on a year now since Oracle’s acquisition of Datanomic, and the addition of Oracle Enterprise Data Quality (EDQ) to the Oracle software family. The big move has caused some big shifts in emphasis and some very encouraging excitement from the field.  To give an illustration, combined with a shameless promotion of how EDQ can help to give quick insights into your data, I did a quick Phrase Profile of the subject field of emails to the Global EDQ mailing list since it was set up last September. The results revealed a very clear theme:   Integration, Integration, Integration! As well as the important Siebel and Oracle Data Integrator (ODI) integrations, we have been asked about integration with a huge variety of Oracle applications, including EBS, Peoplesoft, CRM on Demand, Fusion, DRM, Endeca, RightNow, and more - and we have not stood still! While it would not have been possible to develop specific pre-integrations with all of the above within a year, we have developed a package of feature-rich out-of-the-box web services and batch processes that can be plugged into any application or middleware technology with ease. And with Siebel, they work out of the box. Oracle Enterprise Data Quality version 9.0.4 includes the Customer Data Services (CDS) pack – a ready set of standard processes with standard interfaces, to provide integrated: Address verification and cleansing  Individual matching Organization matching The services can are suitable for either Batch or Real-Time processing, and are enabled for international data, with simple configuration options driving the set of locale-specific dictionaries that are used. For example, large dictionaries are provided to support international name transcription and variant matching, including highly specialized handling for Arabic, Japanese, Chinese and Korean data. In total across all locales, CDS includes well over a million dictionary entries.   Excerpt from EDQ’s CDS Individual Name Standardization Dictionary CDS has been developed to replace the OEM of Informatica Identity Resolution (IIR) for attached Data Quality on the Oracle price list, but does this in a way that creates a ‘best of both worlds’ situation for customers, who can harness not only the out-of-the-box functionality of pre-packaged matching and standardization services, but also the flexibility of OEDQ if they want to customize the interfaces or the process logic, without having to learn more than one product. From a competitive point of view, we believe this stands us in good stead against our key competitors, including Informatica, who have separate ‘Identity Resolution’ and general DQ products, and IBM, who provide limited out-of-the-box capabilities (with a steep learning curve) in both their QualityStage data quality and Initiate matching products. Here is a brief guide to the main services provided in the pack: Address Verification and Standardization EDQ’s CDS Address Cleaning Process The Address Verification and Standardization service uses EDQ Address Verification (an OEM of Loqate software) to verify and clean addresses in either real-time or batch. The Address Verification processor is wrapped in an EDQ process – this adds significant capabilities over calling the underlying Address Verification API directly, specifically: Country-specific thresholds to determine when to accept the verification result (and therefore to change the input address) based on the confidence level of the API Optimization of address verification by pre-standardizing data where required Formatting of output addresses into the input address fields normally used by applications Adding descriptions of the address verification and geocoding return codes The process can then be used to provide real-time and batch address cleansing in any application; such as a simple web page calling address cleaning and geocoding as part of a check on individual data.     Duplicate Prevention Unlike Informatica Identity Resolution (IIR), EDQ uses stateless services for duplicate prevention to avoid issues caused by complex replication and synchronization of large volume customer data. When a record is added or updated in an application, the EDQ Cluster Key Generation service is called, and returns a number of key values. These are used to select other records (‘candidates’) that may match in the application data (which has been pre-seeded with keys using the same service). The ‘driving record’ (the new or updated record) is then presented along with all selected candidates to the EDQ Matching Service, which decides which of the candidates are a good match with the driving record, and scores them according to the strength of match. In this model, complex multi-locale EDQ techniques can be used to generate the keys and ensure that the right balance between performance and matching effectiveness is maintained, while ensuring that the application retains control of data integrity and transactional commits. The process is explained below: EDQ Duplicate Prevention Architecture Note that where the integration is with a hub, there may be an additional call to the Cluster Key Generation service if the master record has changed due to merges with other records (and therefore needs to have new key values generated before commit). Batch Matching In order to allow customers to use different match rules in batch to real-time, separate matching templates are provided for batch matching. For example, some customers want to minimize intervention in key user flows (such as adding new customers) in front end applications, but to conduct a more exhaustive match on a regular basis in the back office. The batch matching jobs are also used when migrating data between systems, and in this case normally a more precise (and automated) type of matching is required, in order to minimize the review work performed by Data Stewards.  In batch matching, data is captured into EDQ using its standard interfaces, and records are standardized, clustered and matched in an EDQ job before matches are written out. As with all EDQ jobs, batch matching may be called from Oracle Data Integrator (ODI) if required. When working with Siebel CRM (or master data in Siebel UCM), Siebel’s Data Quality Manager is used to instigate batch jobs, and a shared staging database is used to write records for matching and to consume match results. The CDS batch matching processes automatically adjust to Siebel’s ‘Full Match’ (match all records against each other) and ‘Incremental Match’ (match a subset of records against all of their selected candidates) modes. The Future The Customer Data Services Pack is an important part of the Oracle strategy for EDQ, offering a clear path to making Data Quality Assurance an integral part of enterprise applications, and providing a strong value proposition for adopting EDQ. We are planning various additions and improvements, including: An out-of-the-box Data Quality Dashboard Even more comprehensive international data handling Address search (suggesting multiple results) Integrated address matching The EDQ Customer Data Services Pack is part of the Enterprise Data Quality Media Pack, available for download at http://www.oracle.com/technetwork/middleware/oedq/downloads/index.html.

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