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  • PostgreSQL to Data-Warehouse: Best approach for near-real-time ETL / extraction of data

    - by belvoir
    Background: I have a PostgreSQL (v8.3) database that is heavily optimized for OLTP. I need to extract data from it on a semi real-time basis (some-one is bound to ask what semi real-time means and the answer is as frequently as I reasonably can but I will be pragmatic, as a benchmark lets say we are hoping for every 15min) and feed it into a data-warehouse. How much data? At peak times we are talking approx 80-100k rows per min hitting the OLTP side, off-peak this will drop significantly to 15-20k. The most frequently updated rows are ~64 bytes each but there are various tables etc so the data is quite diverse and can range up to 4000 bytes per row. The OLTP is active 24x5.5. Best Solution? From what I can piece together the most practical solution is as follows: Create a TRIGGER to write all DML activity to a rotating CSV log file Perform whatever transformations are required Use the native DW data pump tool to efficiently pump the transformed CSV into the DW Why this approach? TRIGGERS allow selective tables to be targeted rather than being system wide + output is configurable (i.e. into a CSV) and are relatively easy to write and deploy. SLONY uses similar approach and overhead is acceptable CSV easy and fast to transform Easy to pump CSV into the DW Alternatives considered .... Using native logging (http://www.postgresql.org/docs/8.3/static/runtime-config-logging.html). Problem with this is it looked very verbose relative to what I needed and was a little trickier to parse and transform. However it could be faster as I presume there is less overhead compared to a TRIGGER. Certainly it would make the admin easier as it is system wide but again, I don't need some of the tables (some are used for persistent storage of JMS messages which I do not want to log) Querying the data directly via an ETL tool such as Talend and pumping it into the DW ... problem is the OLTP schema would need tweaked to support this and that has many negative side-effects Using a tweaked/hacked SLONY - SLONY does a good job of logging and migrating changes to a slave so the conceptual framework is there but the proposed solution just seems easier and cleaner Using the WAL Has anyone done this before? Want to share your thoughts?

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  • VS2010 Extension like Smart Paster?

    - by Eric J.
    Alex Papadimoulis' Smart Paster is a great little tool that can paste text in programmer-friendly ways (e.g. as a StringBuilder, as a language-specific string literal, etc.). However, it doesn't seem to be available for VS2010. Anyone know of a similar extension or of plans to port Smart Paster?

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  • Do you use NDepend?

    - by Karsten
    Hi I've been trying out NDepend, been reading a few blogposts about it and even heard a podcast. I think that NDepend might be a really useful tool, but I still don't see where I would use it. How do you use it? Do you use it, why? why not? I would like to hear about some down to earth real world examples.

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  • Convert Environment.OSVersion to NTDDI version format

    - by David Brown
    In sdkddkver.h of the Windows Platform SDK, there are various OS versions defined as NTDDI_*. For example, Windows XP and its service packs are defined as: #define NTDDI_WINXP 0x05010000 #define NTDDI_WINXPSP1 0x05010100 #define NTDDI_WINXPSP2 0x05010200 #define NTDDI_WINXPSP3 0x05010300 #define NTDDI_WINXPSP4 0x05010400 There are also masks which, along with the OSVER, SPVER, and SUBVER macros, allow you to pull the respective parts out of the NTDDI version. #define OSVERSION_MASK 0xFFFF0000 #define SPVERSION_MASK 0x0000FF00 #define SUBVERSION_MASK 0x000000FF I have all of these defined as constants in C# and what I'd like to do now is convert the data returned by Environment.OSVersion to a value corresponding to one of the NTDDI versions in sdkddkver.h. I could make a massive switch statement, but that's not really as future-proof as I'd like it to be. I would need to update the conversion method every time a new OS or service pack is released. I have a feeling this could be done with the help of some bitwise operators, but I'll be honest and say that those aren't my strong point. I appreciate any help!

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  • Converting mercurial repository to svn repository

    - by Jay
    I know you can convert svn repository to mercurial repository (or use mercurial as a client to svn repo) but what I want is to convert mercurial repository to svn repository. We have some tool that uses SVNKit, and we'd like to continue use it, but want to be able to work on mercurial repository. Hence we want to completely convert mercurial repo to svn repo. Is that something that's possible? (and how?)

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  • WebLogic plugin within Eclipse

    - by Vani
    I am trying to start WebLogic within Eclipse When it starts it complains like this. Unable to load performance pack. Using Java I/O instead. Please ensure that wlntio.dll is in: 'C:\bea81\jdk142_04\bin;.;C:\WINDOWS\system32;C:\WINDOWS;C:\bea81\jdk142_04\jre\bin;C:\Program Files\Java\jre1.6.0\bin\client;C:\Program Files\Java\jre1.6.0\bin;C:\sybase\JS-12_5\bin;C:\sybase\OCS-12_5\lib3p;C:\sybase\OCS-12_5\dll;C:\sybase\OCS-12_5\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Common Files\Roxio Shared\DLLShared\;C:\Program Files\Common Files\Roxio Shared\DLLShared\;C:\Program Files\Common Files\Roxio Shared\9.0\DLLShared\;C:\Program Files\cvsnt;C:\Program Files\Executive Software\DiskeeperWorkstation\;'

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  • RTP H.264 save and replay

    - by user301810
    We are interested in saving a H.264 stream and replaying it. Is there any one who experience saving h.264 using winpcap and replaying it. We were able to save H.263 and replay, but same logic does not work for H.264. We also tried rtpdump tool to save H264 stream, but we were unable to replay it in that format? thanks in advance

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  • How do I use sqlite3 PRAGMA user_version in Objective-c?

    - by mobibob
    I am trying to check the user_version of the sqlite DB. I have an admin tool to bump the version, but I don't understand the syntax of the pragma statement. I am expecting to test the value in an if-statement. Can someone provide a code sample? When I embed the pragma statement in my objective-c code, the compiler throws an error.

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  • Developing WLST scripts with Eclipse

    - by antispam
    We are in the process of developing several WLST (WebLogic Scripting Tool) scripts and we would like to setup a development environment. Has anybody managed to configure Eclipse PyDev (or another plugin) to support it? Do you know any other alternative? Thank you for your answers.

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  • Connect to a wireless network programmatically

    - by Josh Adams
    I'm trying to write an application that connects to my company's wireless network automatically on windows XP. I've found the Wireless LAN API but it requires me to have some hotfix installed on the machine, and you need to have sp2 or higher(There are machines with SP1, and I'm required to support any XP machine). I've tried to find some samples about Wireless Zero Configuration on MSDN but with no luck, only samples I've found are for WinCE, I think Microsoft stopped supporting it. In addition I couldn't find where to download the dll and header file for working with the WZC. There must be a way to do it and work on any service pack because I've found Zwlancfg by ENGL

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  • How to find long running transactions in Websphere MQ Series?

    - by raistlin
    In a J2EE environment the MQ server log shows the following: Process(954584.5) User(mqm) Program(amqzmuc0) AMQ7469: Transactions rolled back to release log space. .... While increasing the logfile size/space might be a temporary solution, the definitive solution must be to identify the culprit process/queue that causes this long transaction. Is there any solution/tool for this? Note: MQ is used via JMS only

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  • SQLCEException was unhandled: Internal Error: Cannot open the shared memory region

    - by dwaz
    I am trying to do a TableAdapter.Fill(dataTable) and it fails with the above error. Here is the code in Zenware.DataSet.Designer.cs [global::System.Diagnostics.DebuggerNonUserCodeAttribute()] [global::System.ComponentModel.DataObjectMethodAttribute(global::System.ComponentModel.DataObjectMethodType.Fill, true)] public virtual int Fill(ZenwareDataSet.BatchPDADataTable dataTable) { this.Adapter.SelectCommand = this.CommandCollection[0]; if ((this.ClearBeforeFill == true)) { dataTable.Clear(); } int returnValue = this.Adapter.Fill(dataTable); // <---Fails here. return returnValue; } This is generated code. Maybe there is something that I need to change? I am wondering if my app has multiple connections to the database. What can this be? Thanks for any help you can provide. Windows Mobile 6.1 device (Trimble Juno SB) SQLServerCompact 3.5 Service Pack 2 Microsoft .NET CF 3.5

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  • there's no sudo command in cygwin

    - by Jason Sundram
    Because there's no sudo command in Cygwin, scripts that I want to run fail with ./install.sh: line N: sudo: command not found What's the standard way for getting around this? Editing the scripts to remove sudo? Getting some sudo-like tool for windows?

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  • UI Automation in Citrix

    - by aceinthehole
    I would like to be able to use a tool like WatiN to automate somethings that needs to interact with a Web App that is access by using an instance of IE running on Citrix. So far it seems impossible to interact with the window at even a rudimentary level using SendKeys as the internal UI components seemingly do not have a handle. Has anyone been able to do this or anything similar?

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  • Writing a plugin for Notepad++

    - by Jukebox
    I use Notepad++ as my main editing tool. I want to write a plugin for it for a feature I'd like to implement, but am unsure of how to go about it. Are there any guides / blogs / tutorials that can point me in the right direction for creating a new plugin?

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  • in visual studio 2008, when I stop debugging an asp classic website visual studio always crashes

    - by yamspog
    We are running visual studio 2008 (with the service pack) and having troubles when we are debugging an asp classic website. We can attach to the w3p process and debug just fine. breakpoints work, we can view variable values. The difficulty arises when it comes time to detach or stop the debugger. Every time we take either approach (detach or stop the debugger) we get a series of crashes from Visual studio. Has anyone seen anything like this? Any suggestions on what to look at?

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