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RE: Programmatically create HTable with snappy-compressed columns - HBase - [mail # user]
...Here it is (the simplest one):                  HColumnDescriptor fam = new HColumnDescriptor(familyName);           &nb...
   Author: Vladimir Rodionov, 2013-07-16, 18:00
RE: Help with HBaseTestingUtility / MiniDFSCluster - HBase - [mail # dev]
...Quick Google "MiniHBaseCluster master not initialized" gives this link: http://girlincomputerscience.blogspot.com/2012_12_01_archive.html  with the same advice: umask 022  Unfortun...
   Author: Vladimir Rodionov, 2013-07-15, 19:30
RE: MiniHBaseCluster on Mac OSX - HBase - [mail # dev]
...David, I can give you release where HBaseTestingUtiliy misbehaves - 0.94.6 (CDH 4.3.0)  Best regards, Vladimir Rodionov Principal Platform Engineer Carrier IQ, www.carrieriq.com e-mail:...
   Author: Vladimir Rodionov, 2013-07-13, 17:45
Master server abort - HBase - [mail # user]
...This is happening in  one of our small QA cluster. HBase 0.94.6.1 (CDH 4.3.0)  1 master + 5 RS. Zk quorum is 1 (on master node)  We can not start the cluster:  In a log f...
   Author: Vladimir Rodionov, 2013-07-11, 18:10
RE: G1 before/after GC time graph - HBase - [mail # user]
...+1  1.8G heap is on a very low side. 32-64GB is more interesting cases.  Best regards, Vladimir Rodionov Principal Platform Engineer Carrier IQ, www.carrieriq.com e-mail: [EMAIL PR...
   Author: Vladimir Rodionov, 2013-07-11, 00:27
RE: GC recommendations for large Region Server heaps - HBase - [mail # user]
...Suraj, what is the maximum GC pause you have observed in your cluster so far? I do not think s-t-w GC pause on 8GB heap will lasts longer than 5-8 secs.  Best regards, Vladimir Rodionov...
   Author: Vladimir Rodionov, 2013-07-08, 18:33
RE: optimizing block cache requests + eviction - HBase - [mail # user]
...Viral,   1. your data access pattern is random and uniform (no data locality at all) 2. or you trash block cache with scan operations with block cache enabled.  or both.  but ...
   Author: Vladimir Rodionov, 2013-07-08, 17:45
RE: Hbase random read performance - HBase - [mail # user]
...Boris if your working set does not fit comfortably into 0.4 * 9 * 12GB ~ 43GB HBase cluster block cache ( and I suppose it does not, because it is less than 1% of your data set  ) - you...
   Author: Vladimir Rodionov, 2013-07-08, 17:32
RE: Poor HBase random read performance - HBase - [mail # dev]
...My bad, Bloom filters won't help to locate most recent version of a column.  So, back to my favorite LevelDB ... To locate most recent  version of a column, LevelDB must check &nbs...
   Author: Vladimir Rodionov, 2013-07-02, 00:09
RE: difference between major and minor compactions? - HBase - [mail # user]
...Major compactions floods network, leaving for other operations too little space. The reason why major compaction are so prohibitively expensive in HBase - 2 block replicas which need to be c...
   Author: Vladimir Rodionov, 2013-06-22, 23:23
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