How Golden Gate will use change data Capture (CDC) in SQLserver2008R2

How Golden Gate will use change data Capture (CDC) in SQL server 2008 R2. How much space it will occupy for each table when it erases the data and what will be the retention period for the tables of the CDC.

So, here's what happens next. Normally, when a tranlog backup occurs, SQL Server may decide to release the tranlog space after the backup of the log, for transactions that have been committed and saved.

When you activate a form any replication, like with OGG and allowing TRANDATA, you need to eat this truncation periodically. So with your configuration, even if the log backup occurs over 15 minutes, data in the journal are not allowed to be released after the log backup until the log backup that occurs after the 4th consecutive time of work.

It is fine if you are not concerned about the lack of free newspaper in 4 hours. Just something to keep in mind.

Tags: Business Intelligence

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    *************************************************************************
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    e, atg, datasource, UserExitMain '

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    Pointers


    Thank you
    Vikas

    Vikas Panwar wrote:
    We strive for GG for JMS
    According to our understanding, there are 2 ways in which it can be configured:
    1. capture the JMS msg and deliver to the DB
    2 DB capture and deliver JMS

    Yes; or, more generally,.
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    (2) GG can use existing trails and deliver (send messages) to JMS

    That also means you could do: database-> trail-> JMS-> path-> database. Which would give you a publish/subscribe architecture w / GG, rather than the many-to-many replication.

    ("Change data capture" terminology database is a bit strange when it comes to e-mail, but you get the idea). For historical or technical reasons, the JMS "capture" may also be referred to as the JMS VAM, and "delivery" of JMS is also going to be sometimes referred to as the JMS (Java) user exit (or java-EU).

    OK, with the terminology of the road...

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    Is very good, although, technically, the user exit before the next version 11.2 implementations do not handle the trails in "Add mode".

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    In other words, in more simple terms: technically, trails should be in 'overtype mode. You can do this either by specifying "overtype mode" or saying the trails are "format version 9.5".» Actually, it does exactly the same thing. Note that this "mode" is not a problem that there is a "abend" upstream. And the 'problem' is not really predictable; Basically, from the point of view of the output of the user, there are duplicate in the trail that is simply processed data. But enough about that. Moving...

    Also, on the top of my head, I don't know that there is never a reason for a file to "throw" in "extract."

    Also... What is with complete & backslashes paths? : - )

    So this is what you have technically expected to have:

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    table GGS. VIKSTK;

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    extract JE911
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    TABLE ggs.vikstk.

    As "best practices", follow these steps:


    1. Copy your *.properties in dirprm. Keep all the config in dirprm. It makes things easier to bear.
    2. using ' / ' instead of '-' becomes much more important here. Some of these paths are read by Java, and some are read by native code (C/C++) depending on the platform. Native code on Windows is ok read a path like 'C:\path\to\foo', but if you pass it a path to the Java application, then you must use either: (1) "C:\\path\\to\\foo" or 2 "C:/path/to/foo." The same is true for relative paths; the advantage of relative paths is you don't have to deal with the "C:" or "E:" prefixes, and prm and property files are independent of the platform.
    3. You can eventually put all the "Properties" in one file, while defining GGS_USEREXIT_CONF and leaving GGS_JAVAUSEREXIT_CONF unset. The only reason for which you want to define the two is if you have files of separation of property, several pumps and he wants to avoid the duplication of your files.
    4. your pump is running the JMS user-exit must spend 100% of the output of the user data. Technically, this is necessary in particular situations, but it is best to always do (must be careful about the filtering as part of a whole operation). You can write filters in Java for more refined filtering.

    The problem here is:


    1. the path of the property for GGS_JAVAUSEREXIT_CONF file is read from Java (or, if not defined, GGS_USEREXIT_CONF is read from Java), which means that you must use "/" and not "------" as the path separator. (Just never use "\", and're you good to go in the configuration of your GG).
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    This error (means that the ggjava.jar is not found below). (The ggjava.jar take care of all the other jars in resources/lib/*.jar of loading). This should be in {GG_HOME}/ggjava/ggjava.jar. In other words, the "ggjava" directory should be in the same directory as 'extract '. In addition, the "ggjava_ue.dll" (or libggjava_ue.so) are GG_HOME (the same as dir "extract").

    Error occurred in javawriter.c [269]: error occurred (except Java): loading Java class: java.lang.NoClassDefFoundError: com/goldengate/atg/datasource/UserExitMain

    in fact, he has no UserExitMain file in the place where he is looking.
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    The UserExitMain is inside a pot inside ggjava/resources/lib/*.jar. By adding ggjava/ggjava.jar to the classpath variable, each GG jar is automatically added to the classpath. (This way, "com, goldengate, atg, datasource" is inside a jar).

    Pointers

    See above...

    And here's a complete example:

    -Folder: dirprm/javaue.prm
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    -ggsci > start javaue

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    -debug, is printed in the report file
    GetEnv (JAVA_HOME)
    GetEnv (PATH)
    GetEnv (LD_LIBRARY_PATH)

    -native lib load the application Java (ggjava/ggjava.jar).
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    GetUpdateBefores

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    TABLE ggs2.*.

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    GG.handlerlist = my_jms

    Java.naming.Factory.initial = org. Apache.ActiveMQ.JNDI.ActiveMQInitialContextFactory
    Java.naming.Provider.URL = tcp://localhost: 61616

    GG. Handler.my_jms.type = JMS
    GG. Handler.my_jms.destination=dynamicQueues/testQueue123
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    GoldenGate.UserExit.nochkpt = true
    GoldenGate.UserExit.Timestamp = UTC

    GoldenGate.log.LogName = cuserexit
    GoldenGate.log.Level = info
    GoldenGate.log.ToFile = true

    GoldenGate.UserExit.Writers = javawriter
    #javawriter.stats.time = 3600
    #javawriter.stats.numrecs = 10000
    javawriter.stats.Full = true
    javawriter.stats.display = true
    # use ': ' for the path Unix/Linux and ';' separator on Windows
    javawriter.bootoptions=-Xmx32m-Xms32m-Djava.class.path=dirprm;ggjava/ggjava.jar;lib/ActiveMQ-all.jar-Dlog4j.Configuration=log4j.properties

    For more information, see the following tutorials:
    * GG w JMS / WebLogic: https://apex.oracle.com/pls/apex/f?p=44785:24:3063410885617911:NO:24:P24_CONTENT_ID, P24_PREV_PAGE:5716, 2
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    It will be useful,
    -Mike

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