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[expand - 3 more] - 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
RE: Scan performance - HBase - [mail # user]
...Lars, I thought that column family is the locality group and placement columns which are frequently accessed together into the same column family (locality group) is the obvious performance ...
   Author: Vladimir Rodionov, 2013-06-22, 00:00
RegionServer Statistics does seem right (0.94.6) - HBase - [mail # dev]
...This is what I see on my RS stats page (/rs-status):  requestsPerSecond=0, numberOfOnlineRegions=292, numberOfStores=299, numberOfStorefiles=112, storefileIndexSizeMB=2, rootIndexSizeKB...
   Author: Vladimir Rodionov, 2013-06-21, 21:39
RE: memstore timestamp and visible timestamp - HBase - [mail # dev]
...Time can go backwards. One time a year. By one hour. I may be wrong but it seems that the situation described by TS (memTS1 > me mTS2 and ts1  To: [EMAIL PROTECTED] Cc: "[EMAIL PROTE...
   Author: Vladimir Rodionov, 2012-08-03, 21:27
RE: search metric about Hbase vs Oracle or Mysql - HBase - [mail # dev]
...I do not think you will find anything. HBase is not the replacement for Ora cle or MySQL. What are you going to compare? Single server performance? Any RDBMs properl y tuned will be faster b...
   Author: Vladimir Rodionov, 2012-07-10, 16:42
[expand - 4 more] - RE: Some suggestions for future features - HBase - [mail # dev]
...Scan implies scanning table and this is what I would like to avoid. I consi der "bulk" delete as a hint (internal filter) for HBase (RegionServer) execution of which can be deferred  un...
   Author: Vladimir Rodionov, 2012-06-06, 17:59
[expand - 1 more] - RE: Shared HDFS for HBase and MapReduce - HBase - [mail # dev]
...Sure,  limiting number of slots is a way of IO throttling for MR jobs If you can do this - go ahead and do this.  Best regards, Vladimir Rodionov Principal Platform Engineer Carrie...
   Author: Vladimir Rodionov, 2012-06-06, 17:49
RE: Coprocessor - HBase - [mail # dev]
...I think the combination of a Scanner on a client side  and Coprocessor (Reg ionObserver) on HBase side will provide streaming functionality you need.  Your coprocessor can intercep...
   Author: Vladimir Rodionov, 2012-06-03, 18:24
[expand - 1 more] - RE: HBase backup option - HBase - [mail # dev]
...Carlos,  By "consistency" I meant - internal HBase consistency between .META. table  and table's WAL. I realize that w/o internal HBase & HDFS support for atomic snapshots there is...
   Author: Vladimir Rodionov, 2012-05-09, 18:03
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