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• Review: CloudPlug Wall Wart Backs Up Linux

  Tiny wall wart computers are everywhere, providing useful services, ease of use, and using little power. Paul Ferrill reviews the CloudPlug, a cross-platform, expandable backup server for both local and offsite storage.

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• Columnar Databases

  - by jchang

  Ingres just published a TPC-H benchmark for VectorWise , an analytic database technology employing 1) SIMD processing (Intel SSE 4.2), 2) better memory optimizations to leverage on-chip cache, 3) compression, 4) Column-based storage. Ingres originated as a research project at UC Berkeley (see Wikipedia ) in the 1970s, and has since become a commercially supported, open source database system. Apparently, Ingres project people later founded Sybase. So Ingres in a sense, is the grandfather (or perhap...(read more)

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• Ubuntu 12.04 can't detect internal mobile broadband (Gobi 2000)

  - by Anega

  Hi I have been trying Ubuntu to detect and connect using the buit in mobile broadband capability in my HP 110 netbook but until now nothing seems to work Output of lspci command: 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2) 00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02) 00:1f.2 SATA controller: Intel Corporation 82801GBM/GHM (ICH7-M Family) SATA Controller [AHCI mode] (rev 02) 01:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01) 02:00.0 Ethernet controller: Atheros Communications Inc. AR8132 Fast Ethernet (rev c0) Output of lsusb command: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 1fea:0008 Bus 005 Device 002: ID 03f0:2a1d Hewlett-Packard Bus 001 Device 005: ID 03f0:241d Hewlett-Packard Gobi 2000 Wireless Modem (QDL mode) So far I have been trying what is intended on several pages, trying to update firmware using wine and then moving .mda or whatever files the update package GobiInstaller.mdi throws out. The results are always the same: After running Output of wine msiexec /a GobiInstaller.msi /qb TARGETDIR="c:\temp" fixme:advapi:GetCurrentHwProfileA (0x33fba8) semi-stub fixme:heap:HeapSetInformation (nil) 1 (nil) 0 fixme:win:RegisterDeviceNotificationA (hwnd=0x13e250, filter=0xf7e984,flags=0x00000001) returns a fake device notification handle! fixme:heap:HeapSetInformation (nil) 1 (nil) 0 fixme:heap:HeapSetInformation (nil) 1 (nil) 0 fixme:advapi:RegisterEventSourceW ((null),L"Bonjour Service"): stub fixme:advapi:ReportEventA (0xcafe4242,0x0004,0x0000,0x00000064, (nil),0x0001,0x00000000,0x79e58c,(nil)): stub fixme:advapi:ReportEventW (0xcafe4242,0x0004,0x0000,0x00000064, (nil),0x0001,0x00000000,0x12e6d0,(nil)): stub fixme:winsock:WSAIoctl WS_SIO_UDP_CONNRESET stub fixme:winsock:WSAIoctl -> SIO_ADDRESS_LIST_CHANGE request: stub fixme:iphlpapi:DeleteIpForwardEntry (pRoute 0x79e920): stub fixme:iphlpapi:CreateIpForwardEntry (pRoute 0x79e958): stub fixme:advapi:ReportEventA (0xcafe4242,0x0004,0x0000,0x00000064, (nil),0x0001,0x00000000,0x79e58c,(nil)): stub fixme:advapi:ReportEventW (0xcafe4242,0x0004,0x0000,0x00000064, (nil),0x0001,0x00000000,0x12e6d0,(nil)): stub fixme:service:EnumServicesStatusW resume handle not supported fixme:service:EnumServicesStatusW resume handle not supported fixme:advapi:ReportEventA (0xcafe4242,0x0004,0x0000,0x00000064,(nil),0x0001,0x00000000,0x79e58c,(nil)): stub fixme:advapi:ReportEventW (0xcafe4242,0x0004,0x0000,0x00000064, (nil),0x0001,0x00000000,0x12e6d0,(nil)): stub fixme:netapi32:NetGetJoinInformation Semi-stub (null) 0x79e644 0x79e63c fixme:winsock:WSAIoctl WS_SIO_UDP_CONNRESET stub fixme:storage:create_storagefile Storage share mode not implemented. err:msi:ITERATE_Actions Execution halted, action L"_693CD41C_A4A2_4FA1_8888_FC56C9E6E13B" returned 1603 err:rpc:I_RpcGetBuffer no binding err:rpc:I_RpcGetBuffer no binding andres@andres-HP-Mini-110-1100:~/.wine/drive_c/Qualcomm$ fixme:advapi:ReportEventA (0xcafe4242,0x0004,0x0000,0x00000064,(nil),0x0001,0x00000000,0x79e588,(nil)): stub fixme:advapi:ReportEventW (0xcafe4242,0x0004,0x0000,0x00000064, (nil),0x0001,0x00000000,0x12e6d0,(nil)): stub And creates 2 empty folders, I have been trying hard and I am not sure if I am doing it the way it should be. Thanks

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• Exadata ROI cases

  - by Javier Puerta

  The following cases illustrate the type of ROI benefits that customers can obtain from their investment in Exadata infrastructure. Australian Finance Group will achieve a 42% ROI by and break even in three years by consolidating Oracle E-Business Suite and Siebel applications on Oracle Exadata.  Read the ROI case at: http://www.oracle.com/us/corporate/customers/afg-1-exadata-cs-1354807.pdf In addition to this study, there are Oracle Exadata Mainstay ROI Case Studies for the following: Merck -Pharma, Oracle Exadata Achieves Fivefold Performance Increase for Critical Product Research Platform Turkcell Accelerates Reporting Tenfold, Saves on Storage and Energy Costs with Consolidated Oracle Exadata Platform

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• Oracle's Cloud Strategie nach der OOW 2012

  - by Manuel Hossfeld

  Auf der diesjährigen Oracle Open World war „die Cloud“ nicht nur ein vielbenutztes Buzzword, sondern auch Anlass für einige interessante Ankündigungen. Wer keine Zeit oder Muße hatte, sich die entsprechenden Keynotes von Larry Ellison und Thomas Kurian anzuhören, erfährt in diesem Artikel die wesentlichen Änderungen. Die erste Neuerung: Oracle wird in Zukunft alle drei „Sorten“ bzw. „Ebenen“ von Cloud Computing anbieten: SaaS (Software as a Service) – die Bereitstellung von kompletten Fachanwendungen z.B. aus der eBusiness Suite in Form eines Mietmodells - gab es schon länger. Abgesehen von der Tatsache, dass hier zusätzliche/neuere Komponenten und Module der durch die letzten Zukäufe von Oracle noch breiter gewordenen Palette angeboten werden, ändert sich am Prinzip nichts. Bei PaaS (Plattform as a Service) sind vor allem die beiden bereits letztes Jahr angekündigten Dienste „Database Service“ (basierend auf APEX) und „Java Service“ (basierend auf Weblogic) zu nennen, für die nun auch konkrete Pakete und Preise (ca.175$ bis 2000$/Monat) sowie die Möglichkeit zur Anmeldung auf http://cloud.oracle.com vorliegen. Interessanterweise gehört auch ein sog. „Social Service“ in diese Schicht, mit der Oracle Kunden ihre Anwendungen in Zukunft auf standardisierte Weise durch Social Networking Funktionalität wie z.B. Microblogging erweitern können.Ebenso neu angekündigt wurde ein "Developer Service", welcher z.B. Sourcecode-Verwaltung durch GIT Repositories sowie Wikis und Issue Tracking bereit stellen soll. Die dort mittels JDeveloper, Netbeans oder Eclipse erstellten Applikationen können dann nahtlos innerhalb kürzester Zeit in den Java Service deployed werden. Komplett neu und für einige sicher überraschend ist hingegen der Bereich IaaS (Infrastructure as a Service) – Hier geht es um die Bereitstellung von Basis-Infrastrukturkomponenten wie Storage, Rechenleistung (letztlich also Betriebssysteme / VMs) und Messaging / Queueing. Genaue Details oder Preise zu den IaaS Angeboten sind noch nicht bekannt, aber zumindest zu den Storage- und Messaging Services können grundlegende Daten bereits auf http://cloud.oracle.com eingesehen werden Die zweite Neuerung: Kunden können in Zukunft als Alternative zum Betrieb der o.g. „Oracle Cloud“, diese auch komplett hinter ihrer eigenen Firewall aufbauen lassen. Mit anderen Worten: Oracle baut und betreibt bei diesem als „Oracle Private Cloud“ bezeichneten Angebot alle Komponenten selbst – die Daten verlassen aber niemals das Gebäude des Kunden. Letzteres ist gerade bei uns im Datenschutz-sensiblen Deutschland ein wichtiger Aspekt. Da die verwendeten Komponenten in beiden Fällen die gleichen sind, ist auch ein „Umziehen“ oder Erweitern der Private Cloud in die Public Cloud (oder zurück) ohne Änderungen an den Anwendungen möglich. Der Möglichkeit einer "Hybrid Cloud", bei der Teile einer Anwendung hinter der eigenen Firewall, andere Teile aber in der Oracle Cloud laufen, wird damit Realität.

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• How to Split an Outlook PST File?

  MS Outlook PST Files: Personal Storage Table (PST) is a vital component of Microsoft Outlook email client. Almost all the Outlook mailbox items including mail messages, contacts, notes, calendar, jou... [Author: Pamela Broom - Computers and Internet - April 12, 2010]

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• Working with the new FSP dispersion rules

  - by Kevin Smith

  In a previous post I provided instructions for how you can remove the dispersion directories that are present in the default storage rule in the PS3 release of UCM (11.1.1.4.0). In this post I will describe a suggested approach for working with the new dispersion rules so that new content takes advantage of the dispersion rules but migrated content uses the legacy file paths so it will retain its current web URLs.

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• Not able to change flash settings

  - by Zeyu

  My Gnome crashes constantly when I open web pages containing flash so I tried to turn off the hardware acceleration. I opened the Adobe flash player settings panel but found that the buttons are not clickable. I can still switch between display/privacy/storage.. panels using TAB and ENTER key. But for others like the "Enable hardware acceleration" checkbox this won't work. Anyone knows how to solve it? Thanks.

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• Beware of SQL Server and PerfMon differences in disk latency calculation

  - by Michael Zilberstein

  Recently sp_blitz procedure on one of my OLTP servers returned alarming notification about high latency on one of the disks (more than 100ms per IO). Our chief storage guy didn’t understand what I was talking about – according to his measures, average latency is only about 15ms. In order to investigate the issue, I’ve recorded 2 snapshots of sys.dm_io_virtual_file_stats and calculated latency per read and write separately. Results appeared to be even more alarming: while for read average latency...(read more)

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• Checksum Errors From Hard Disk

  - by Ademos

  After running GSmartControl, I received three checksum errors on my storage hard disk. Error in Attribute Data structure: checksum error Error in Attribute Thresholds structure: checksum error Error in ATA Error Log structure: checksum error Does this indicate a hard disk failure? Because, this is the THIRD TIME I have replaced the same hard disk. (after seeing this error) The hard disk is a Western Digital Caviar Green. (2 TB)

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• Can Google Employees See My Saved Google Chrome Passwords?

  - by Jason Fitzpatrick

  Storing your passwords in your web browser seems like a great time saver, but are the passwords secure and inaccessible to others (even employees of the browser company) when squirreled away? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-driven grouping of Q&A web sites. The Question SuperUser reader MMA is curious if Google employees have (or could have) access to the passwords he stores in Google Chrome: I understand that we are really tempted to save our passwords in Google Chrome. The likely benefit is two fold, You don’t need to (memorize and) input those long and cryptic passwords. These are available wherever you are once you log in to your Google account. The last point sparked my doubt. Since the password is available anywhere, the storage must in some central location, and this should be at Google. Now, my simple question is, can a Google employee see my passwords? Searching over the Internet revealed several articles/messages. Do you save passwords in Chrome? Maybe you should reconsider: Talks about your passwords being stolen by someone who has access to your computer account. Nothing mentioned about the central storage security and vulnerability. There is even a response from Chrome browser security tech lead about the first issue. Chrome’s insane password security strategy: Mostly along the same line. You can steal password from somebody if you have access to the computer account. How to Steal Passwords Saved in Google Chrome in 5 Simple Steps: Teaches you how to actually perform the act mentioned in the previous two when you have access to somebody else’s account. There are many more (including this one at this site), mostly along the same line, points, counter-points, huge debates. I refrain from mentioning them here, simply carry a search if you want to find them. Coming back to my original query, can a Google employee see my password? Since I can view the password using a simple button, definitely they can be unhashed (decrypted) even if encrypted. This is very different from the passwords saved in Unix-like OS’s where the saved password can never be seen in plain text. They use a one-way encryption algorithm to encrypt your passwords. This encrypted password is then stored in the passwd or shadow file. When you attempt to login, the password you type in is encrypted again and compared with the entry in the file that stores your passwords. If they match, it must be the same password, and you are allowed access. Thus, a superuser can change my password, can block my account, but he can never see my password. So are his concerns well founded or will a little insight dispel his worry? The Answer SuperUser contributor Zeel helps put his mind at ease: Short answer: No* Passwords stored on your local machine can be decrypted by Chrome, as long as your OS user account is logged in. And then you can view those in plain text. At first this seems horrible, but how did you think auto-fill worked? When that password field gets filled in, Chrome must insert the real password into the HTML form element – or else the page wouldn’t work right, and you could not submit the form. And if the connection to the website is not over HTTPS, the plain text is then sent over the internet. In other words, if chrome can’t get the plain text passwords, then they are totally useless. A one way hash is no good, because we need to use them. Now the passwords are in fact encrypted, the only way to get them back to plain text is to have the decryption key. That key is your Google password, or a secondary key you can set up. When you sign into Chrome and sync the Google servers will transmit the encrypted passwords, settings, bookmarks, auto-fill, etc, to your local machine. Here Chrome will decrypt the information and be able to use it. On Google’s end all that info is stored in its encrpyted state, and they do not have the key to decrypt it. Your account password is checked against a hash to log in to Google, and even if you let chrome remember it, that encrypted version is hidden in the same bundle as the other passwords, impossible to access. So an employee could probably grab a dump of the encrypted data, but it wouldn’t do them any good, since they would have no way to use it.* So no, Google employees can not** access your passwords, since they are encrypted on their servers. * However, do not forget that any system that can be accessed by an authorized user can be accessed by an unauthorized user. Some systems are easier to break than other, but none are fail-proof. . . That being said, I think I will trust Google and the millions they spend on security systems, over any other password storage solution. And heck, I’m a wimpy nerd, it would be easier to beat the passwords out of me than break Google’s encryption. ** I am also assuming that there isn’t a person who just happens to work for Google gaining access to your local machine. In that case you are screwed, but employment at Google isn’t actually a factor any more. Moral: Hit Win + L before leaving machine. While we agree with zeel that it’s a pretty safe bet (as long as your computer is not compromised) that your passwords are in fact safe while stored in Chrome, we prefer to encrypt all our logins and passwords in a LastPass vault. Have something to add to the explanation? Sound off in the the comments. Want to read more answers from other tech-savvy Stack Exchange users? Check out the full discussion thread here.     

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• Need help in using hadoop in a Spring-Hibernate-JPA based web application [closed]

  - by John Varghese

  Possible Duplicate: Need help in using hadoop framework in a Spring-Hibernate-JPA based web application We are developing a Spring-Hibernate-JPA based web application which uses MySql as the database for storage and retrieval. We need to store and compute huge amounts of data, for that we need to use hadoop framework. How hadoop framework can be used in our web application to store and compute huge amounts of data?

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• Refresh resources in Windows Phone 7 app

  - by Eugene

  I have a Windows Phone app that relies on an XML data file that comes packaged with the app. In the next version of my app, the XML file will be updated, how do I update the data file once per app update? I thought I could change the file name in the isolated storage, but that would leave trash behind. I could also check for exceptions when I load the XML file, but are there any other, more elegant ways?

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• Hash Sum mismatch on python-keyring

  - by Gearoid Murphy

  I came in to my workstation this morning to find an apt error notification relating to a hash sum mismatch on the python keyring password storage mechanism, given the sensitive nature of this package, this gives me some cause for concern. Has anyone else seen this error?, how can I ensure that my system has not been compromised? Failed to fetch http://gb.archive.ubuntu.com/ubuntu/pool/main/p/python-keyring/python-keyring_0.9.2-0ubuntu0.12.04.2_all.deb Hash Sum mismatch Xubuntu 11.04 AMD64

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• Review: Apricorn Aegis Padlock

  For secure, portable external storage needs, the Apricorn Aegis Padlock combines hardware encryption with a built-in numeric keypad and PIN that stop unauthorized data access.

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• FileStream and FileTable in SQL Server 2012

  SQL Server 2012 enhanced the SQL Server 2008 FileStream data type by introducing FileTable, which lets an application integrate its storage and data management components to allow non-transactional access, and provide integrated SQL Server services. Arshad Ali explains how. Top 5 hard-earned lessons of a DBAIn part one, read about ‘The Case of the Missing Index’ and learn from the experience of The DBA Team. Read now.

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• Virtualized data centre&ndash;Part four: The design

  - by marc dekeyser

  Welcome back to the fourth post in this series! Today we will have a look at what Microsoft recommends as a “private cloud design” and what I will make of it. Whilst my own solution is based of the reference architecture, it is quite different indeed! An important thing to know is that, whilst I am using the private cloud as a reference, I am skipping most of the steps in designing a private cloud. If that is why you are here, please read the links at the end of the article and skim through my own content. A private cloud is much more process driven than just building a virtual infrastructure… The architecture of it all… So imagine for a minute that you have unlimited funds to build this lab of yours… You’d want redundancy on all levels and separation of each network where possible! Unfortunately we don’t have that luxury and, as you saw me hinting at in the previous article, our own design will be more limited but still quite capable! Networking From the networking perspective I will not have a fully redundant network, after all, this is but a lab environment! Thanks to Server 2012 I will be able to use bonding on my NIC’s and use LACP to improve the performance on that part. Storage As I mentioned in the previous article a Synology DS1218+ will be used for iSCSI provisioning. This device has 2 NICs on-board which can be bonded in to one 2 Gbps interface giving me a decent throughput and making the disks the most limiting factor in the storage design. Domain controllers and extra infrastructure Server 2012 completely supports running domain controllers virtualized and has no need to actually have a reachable DC when booting… That being said I need a remote access machine to power on the hosts (I have no need for them running 24/7) and a possible System Center VMM 2012 box (although server 2012 is not supported until SP1 :( ). Undecided on if I am to install those boxes separately or as a virtual machine… Which amounts to… Something like this pretty picture!                   Sources Microsoft Private Cloud Solutions Repository (en-US) http://social.technet.microsoft.com/wiki/contents/articles/12131.microsoft-private-cloud-solutions-repository-en-us.aspx Reference  Architecture: http://social.technet.microsoft.com/wiki/contents/articles/3819.reference-architecture-for-private-cloud.aspx Private Cloud Reference Model: http://social.technet.microsoft.com/wiki/contents/articles/4399.private-cloud-reference-model.aspx

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• Investing in Servers by Intel

  - by Koushal Deshpande

  Originally posted on: http://geekswithblogs.net/BizTalkAndOtherTechs/archive/2013/10/31/investing-in-servers-by-intel.aspxA nice article reference from Intel, refer here. Referees to cloud as well. Choose correctly what you need. 1 Do determine right server for your company. There is no use getting a server that has redundant services but still add to the costs. 2 Do get servers that can be upgraded. A server with limited memory and storage may not be able to keep up with your business growth. The basic memory and storage options might not be sufficient. Consider at least 8GB of RAM and 1 terabyte of hard disk space. 3 Do check the server has at least one Gigabit Ethernet port. This allows high speed transferring of files and increases productivity for your employees. USB and Firewire ports may not be enough as their transfer speed is too low and will affect the productivity of your company. Infinite Technologies is ready to help perform this upgrade. Contact Infinite Technologies now View our other resellers » 4 Do verify that the server comes with documentation. Documentation allows you to make a claim when your server breaks down and is supported by a warranty. 6 Do check the support options for the server from the manufacturer. Different manufacturer has different support options such as maintenance plans and software upgrades. 5 Do always look into the warranty. Get an enhanced warranty that guarantees response and repair time to avoid disruption. 7 Do get server management tools that can be used on any computer. Server management tools should be cross compatible across different operating systems to take into account future PC replacements. 8 Do check the power usage of the servers. Get the right power supply to avoid damaging server hardware and consider the Intel® Xeon® E3 processor to help save on your electricity bills. 9 Do check what built-in security packages are available. Ensure that your server is protected. Built-in security1 helps you save on getting add on security packages.

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• OVERVIEW ORACLE SALES PLAYS

  - by michaela.seika(at)oracle.com

  As an EMEA VAD partner, please update your knowledge on Oracle's Hardware and Software Solutions. Please join us at one of the following WebConferences and sent us a short mail for your registration: Tuesday, 15. February 2011 Sales Play 1: Overview of the High Impact Sales Plays - SALES Thursday, 17. February 2011 Sales Play 2: High Impact Sales Plays - TECHNICAL Further information: Database Application Acceleration with Flash Storage  Oracle's Sun Hardware Solutions

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• WebCenter Customer Spotlight: Hitachi Data Systems

  - by me

  Author: Peter Reiser - Social Business Evangelist, Oracle WebCenter Watch this Webcast to see a live demo on how HDS creates multilingual content for their 35+ regional websites  Solution SummaryHitachi Data Systems (HDS) provides mid-range and high-end storage systems, software and services. It is a wholly owned subsidiary of Hitachi Ltd. HDS is based in Santa Clara, California, and has over 5,300 employees in more then 100 countries and regions. HDS's main objectives were to provide a consistent message across all their sites, to maintain a tight governance structure across their messages and related content, expand the use of the existing content management systems and implement a centralized translation management system. HDS implemented a global web content management system based on Oracle WebCenter Content and integrated the Lingotek translation management system to manage their multilingual content. The implemented solution provides each Geo with the ability to expand their web offering to meet local market needs, while staying aligned with the Corporate Web Guidelines Company OverviewHitachi Data Systems (HDS) provides mid-range and high-end storage systems, software and services. It is a wholly owned subsidiary of Hitachi Ltd. and part of the Hitachi Information Systems & Telecommunications Division. The company sells through direct and indirect channels in more than 170 countries and regions. Its customers include of 50 percent of the Fortune 100 companies. HDS is based in Santa Clara California and has over 5,300 employees in more than 100 countries and regions. Business ChallengesHDS has over 35 global websites and the lack of global web capabilities led to inconsistency of messaging, slower time to market and failed to address local language needs. There was an extensive operational overhead due to manual and redundant processes. Translation efforts where superficial, inconsistent and wasteful and the lack of translation automation tools discouraged localization.  HDS's main objectives were to provide a consistent message across all their sites, to maintain a tight governance structure across their messages and related content, expand the use of the existing content management systems and implement a centralized translation management system. Solution DeployedHDS implemented a global web content management system based on Oracle WebCenter Content. The solution supports decentralized publishing for their 35+ global sites to address local market needs while ensuring editorial and brand review trough embedded review processes. They integrated the Lingotek translation management system into Oracle WebCenter Content to manage their multilingual content. Business Results Provides each Geo with the ability to expand their web offering to meet local market needs, while staying aligned with the Corporate Web Guidelines Enables end-to-end content lifecycle management across multiple languages Leverage translation memory for reuse and consistency Reduce time to market with central repository of translated content Additional Information HDS Webcast Oracle WebCenter Content Lingotek website

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• To SYNC or not to SYNC – Part 3

  - by AshishRay

  I can't believe it has been almost a year since my last blog post. I know, that's an absolute no-no in the blogosphere. And I know that "I have been busy" is not a good excuse. So - without trying to come up with an excuse - let me state this - my apologies for taking such a long time to write the next Part. Without further ado, here goes. This is Part 3 of a multi-part blog article where we are discussing various aspects of setting up Data Guard synchronous redo transport (SYNC). In Part 1 of this article, I debunked the myth that Data Guard SYNC is similar to a two-phase commit operation. In Part 2, I discussed the various ways that network latency may or may not impact a Data Guard SYNC configuration. In this article, I will talk in details regarding why Data Guard SYNC is a good thing. I will also talk about distance implications for setting up such a configuration. So, Why Good? Why is Data Guard SYNC a good thing? Because, at the end of the day, this gives you the assurance of zero data loss - it doesn’t matter what outage may befall your primary system. Befall! Boy, that sounds theatrical. But seriously - think about this - it minimizes your data risks. That’s a big deal. Whether you have an outage due to bad disks, faulty hardware components, hardware / software bugs, physical data corruptions, power failures, lightning that takes out significant part of your data center, fire that melts your assets, water leakage from the cooling system, human errors such as accidental deletion of online redo log files - it doesn’t matter - you can have that “Om - peace” look on your face and then you can failover to the standby system, without losing a single bit of data in your Oracle database. You will be a hero, as shown in this not so imaginary conversation: IT Manager: Well, what’s the status? You: John is doing the trace analysis on the storage array. IT Manager: So? How long is that gonna take? You: Well, he is stuck, waiting for a response from <insert your not-so-favorite storage vendor here>. IT Manager: So, no root cause yet? You: I told you, he is stuck. We have escalated with their Support, but you know how long these things take. IT Manager: Darn it - the site is down! You: Not really … IT Manager: What do you mean? You: John is stuck, but Sreeni has already done a failover to the Data Guard standby. IT Manager: Whoa, whoa - wait! Failover means we lost some data, why did you do this without letting the Business group know? You: We didn’t lose any data. Remember, we had set up Data Guard with SYNC? So now, any problems on the production – we just failover. No data loss, and we are up and running in minutes. The Business guys don’t need to know. IT Manager: Wow! Are we great or what!! You: I guess … Ok, so you get it - SYNC is good. But as my dear friend Larry Carpenter says, “TANSTAAFL”, or "There ain't no such thing as a free lunch". Yes, of course - investing in Data Guard SYNC means that you have to invest in a low-latency network, you have to monitor your applications and database especially in peak load conditions, and you cannot under-provision your standby systems. But all these are good and necessary things, if you are supporting mission-critical apps that are supposed to be running 24x7. The peace of mind that this investment will give you is priceless, especially if you are serious about HA. How Far Can We Go? Someone may say at this point - well, I can’t use Data Guard SYNC over my coast-to-coast deployment. Most likely - true. So how far can you go? Well, we have customers who have deployed Data Guard SYNC over 300+ miles! Does this mean that you can also deploy over similar distances? Duh - no! I am going to say something here that most IT managers don’t like to hear - “It depends!” It depends on your application design, application response time / throughput requirements, network topology, etc. However, because of the optimal way we do SYNC, customers have been able to stretch Data Guard SYNC deployments over longer distances compared to traditional, storage-centric ways of doing this. The MAA Database 10.2 best practices paper Data Guard Redo Transport & Network Configuration, and Oracle Database 11.2 High Availability Best Practices Manual talk about some of these SYNC-related metrics. For example, a test deployment of Data Guard SYNC over 330 miles with 10ms latency showed an impact less than 5% for a busy OLTP application. Even if you can’t deploy Data Guard SYNC over your WAN distance, or if you already have an ASYNC standby located 1000-s of miles away, here’s another nifty way to boost your HA. Have a local standby, configured SYNC. How local is “local”? Again - it depends. One customer runs a local SYNC standby across the campus. Another customer runs it across 15 miles in another data center. Both of these customers are running Data Guard SYNC as their HA standard. If a localized outage affects their primary system, no problem! They have all the data available on the standby, to which they can failover. Very fast. In seconds. Wait - did I say “seconds”? Yes, Virginia, there is a Santa Claus. But you have to wait till the next blog article to find out more. I assure you tho’ that this time you won’t have to wait for another year for this.

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• Clear list of recent repositories in Git Extensions

  - by Marko Apfel

  Orphaned and wrong specified repositories in the recent list are annoying. Straightaway I does not found an option to clean this entries. And also not the persistence place for that. So it was time for Process Explorer. The storage happens under: HKEY_CURRENT_USER\Software\GitExtensions\GitExtensions\1.0.0.0 in the string value “history” You could edit the content of the string value or delete it – than during restarting Git Extensions the string value will be created with a default skeleton.

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• EMC, HP Protect VMware Environments

  EMC and HP are just two of many storage vendors with announcements at this week's VMworld show. Will there be big news from the VMware-Cisco-EMC alliance?

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• Harnessing Business Events for Predictive Decision Making - part 1 / 3

  - by Sanjeev Sharma

  Businesses have long relied on data mining to elicit patterns and forecast future demand and supply trends. Improvements in computing hardware, specifically storage and compute capacity, have significantly enhanced the ability to store and analyze mountains of data in ever shrinking time-frames. Nevertheless, the reality is that data growth is outpacing storage capacity by a factor of two and computing power is still very much bounded by Moore's Law, doubling only every 18 months.Faced with this data explosion, businesses are exploring means to develop human brain-like capabilities in their decision systems (including BI and Analytics) to make sense of the data storm, in other words business events, in real-time and respond pro-actively rather than re-actively. It is more like having a little bit of the right information just a little bit before hand than having all of the right information after the fact. To appreciate this thought better let's first understand the workings of the human brain.Neuroscience research has revealed that the human brain is predictive in nature and that talent is nothing more than exceptional predictive ability. The cerebral-cortex, part of the human brain responsible for cognition, thought, language etc., comprises of five layers. The lowest layer in the hierarchy is responsible for sensory perception i.e. discrete, detail-oriented tasks whereas each of the above layers increasingly focused on assembling higher-order conceptual models. Information flows both up and down the layered memory hierarchy. This allows the conceptual mental-models to be refined over-time through experience and repetition. Secondly, and more importantly, the top-layers are able to prime the lower layers to anticipate certain events based on the existing mental-models thereby giving the brain a predictive ability. In a way the human brain develops a "memory of the future", some sort of an anticipatory thinking which let's it predict based on occurrence of events in real-time. A higher order of predictive ability stems from being able to recognize the lack of certain events. For instance, it is one thing to recognize the beats in a music track and another to detect beats that were missed, which involves a higher order predictive ability.Existing decision systems analyze historical data to identify patterns and use statistical forecasting techniques to drive planning. They are similar to the human-brain in that they employ business rules very much like mental-models to chunk and classify information. However unlike the human brain existing decision systems are unable to evolve these rules automatically (AI still best suited for highly specific tasks) and  predict the future based on real-time business events. Mistake me not,  existing decision systems remain vital to driving long-term and broader business planning. For instance, a telco will still rely on BI and Analytics software to plan promotions and optimize inventory but tap into business events enabled predictive insight to identify specifically which customers are likely to churn and engage with them pro-actively. In the next post, i will depict the technology components that enable businesses to harness real-time events and drive predictive decision making.

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• starting project with growth in mind.

  - by marabutt

  I have an idea for a web application and have some good people keen to get involved. I will be doing most of the code at the start and have a few years experience with some quite large projects. I have nearly 0 budget. What view should I take with regard to data storage / database? Get the project running quickly and inexpensively, then re-evaluate if it is a success? Does anyone have experience with this and advice?

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