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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
[expand - 3 more] - RE: keyvalue cache - HBase - [mail # dev]
..."in the mean time, memcached could provide all those benefits without addin g any complexity to hbase..."  Tell this to Hypertable guys next time when they will be testing random get s ...
   Author: Vladimir Rodionov, 2012-04-04, 21:57
RE: LZ4 compression support - HBase - [mail # dev]
...LZ4 is slightly faster than snappy (from my own tests) but I really doubt t hat anyone will see performance difference in HBase (or in Hadoop)  Best regards, Vladimir Rodionov Principal...
   Author: Vladimir Rodionov, 2012-02-28, 18:20
RE: LIRS cache as an alternative to LRU cache - HBase - [mail # dev]
...afaik, existing LruBlockCache is not exactly LRU cache It utilizes more advanced algorithm to avoid cache trashing during scan ops  by dividing cache into three sub-caches (for newly ad...
   Author: Vladimir Rodionov, 2012-02-21, 17:09
[expand - 1 more] - RE: Scan performance on a big table as combination of multiple logic tables - HBase - [mail # dev]
...10 tables are fine. 1000 are not, especially when one does table pre-splitt ing to increase write perf.  Too many regions kill HBase.  Best regards, Vladimir Rodionov Principal Pla...
   Author: Vladimir Rodionov, 2012-02-16, 00:11
RE: Stress testing releases candidates - HBase - [mail # dev]
...+1.  Large number of regions (> 1000) per RS + heavy load - this is what we have  in our environment (staging and productions)  Its not 0.92, of course. Its 90.4 (we just u...
   Author: Vladimir Rodionov, 2012-01-06, 18:30
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