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From maoling <...@git.apache.org>
Subject [GitHub] zookeeper issue #567: ZOOKEEPER-3071: Add a config parameter to control tran...
Date Fri, 07 Sep 2018 09:00:42 GMT
Github user maoling commented on the issue:

    https://github.com/apache/zookeeper/pull/567
  
    @suyogmapara 
    - **1** just as we both observe that when `txnLogSizeLimitInKb < preAllocSize`,for
every transaction,it will create a log block. -1
    - **2** when set txnLogSizeLimitInKb > preAllocSize
        e.g `"-Dzookeeper.txnLogSizeLimitInKb=25600" "-Dzookeeper.preAllocSize=20480"`
    ` ./zk-latencies.py --servers "localhost:2181" --root_znode="/zk-latencies6" --znode_count=10000
--znode_size=1024 --synchronous` crete nodes( with size:1024byte--1kb) ceaselessly,we will
see
    the log block will rise from 20971536 byte to 41943056 byte.
    - **3**.since one node size has been limited 1MB,So it has decided that a single transaction
log will not be very large?
    - **4**.look at the code,the `txnLogSizeLimitInKb` controls the size of a single transaction
log? or the size of a group commit?the control of this size is not accurate?  



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