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[HBASE-11854] MetricsRegion.updateScanNext takes 20% of overall RegionScannerImpl.nextRaw call - HBase - [issue]
...From our internal profiling we were surprised by amount of time spent in this call. Further investigation is needed....
http://issues.apache.org/jira/browse/HBASE-11854    Author: Vladimir Rodionov, 2014-08-28, 22:36
[expand - 2 more] - Re: 0.98-trunk build (pom) issue - HBase - [mail # dev]
...-Phadoop.version=2.2 worked fine to me. I was able to build package andcreate eclipse workspace. I just checked dependencies and all hadoop libsare 2.2?-Vladimir RodionovOn Thu, Aug 14, 2014...
   Author: Vladimir Rodionov, 2014-08-14, 17:52
Re: how to do parallel scanning in map reduce using hbase as input? - HBase - [mail # dev]
...I am working on improving inter-region scan performance and have the patchalready. The patch will be committed as soon as all tests are done. Thisshould improve M/R over HBase performance be...
   Author: Vladimir Rodionov, 2014-07-24, 20:24
[expand - 2 more] - Re: Strange log messages during scan operations - HBase - [mail # dev]
...OK, seems they are harmless ... but  I do not do anydeletes/writes/updates - only reads. There is a substantial delay betweenmajor compaction finish and last message in  a log file...
   Author: Vladimir Rodionov, 2014-07-15, 18:54
Re: Gathering opinions and recommendations - HBase - [mail # dev]
...Thanks, everyoneI think we will go with 0.98.2-VladimirOn Tue, May 27, 2014 at 3:41 PM, Demai Ni  wrote: ...
   Author: Vladimir Rodionov, 2014-05-27, 23:30
[expand - 1 more] - Re: On coprocessor API evolution - HBase - [mail # dev]
...Michael S.wager that when they do, it will work and not have these issues. I believethat they are writing their stuff in C/C++, if so, then they’d have anadvantage of using shared memory. &n...
   Author: Vladimir Rodionov, 2014-05-19, 19:05
Re: Comparing the performance of 0.98.2 RC0 and 0.98.0 using YCSB - HBase - [mail # dev]
...*7x EC2 c3.8xlarge: 1 master, 5 slaves, 1 test client*Andrew, I think these numbers are far from maximum you can get from thisset up. Why only 1 test client?-Vladimir RodionovOn Tue, May 6, ...
   Author: Vladimir Rodionov, 2014-05-11, 02:50
[expand - 1 more] - Re: anyone interested in openhft? - HBase - [mail # dev]
...Besides this, the implementation is very basic. The performance numbers arevery impressive, but for small objects of the  same size.On Wed, Apr 16, 2014 at 12:31 AM, Vladimir Rodionovwr...
   Author: Vladimir Rodionov, 2014-04-16, 07:37
[expand - 3 more] - Re: HBase region server failure issues - HBase - [mail # dev]
...*We also had a global HDFS file limit to contend with*Yes, we have been seeing this from time to time in our production clusters.Periodic purging of old files helps, but the issue is obvious...
   Author: Vladimir Rodionov, 2014-04-15, 20:03
Re: HBase atomic append functionality (not just client) - HBase - [mail # dev]
...Thanks, LarsThis JIRA is worth looking at. This hint will improve all reads: simplegets, increments and appends.-VladimirOn Mon, Apr 14, 2014 at 1:46 PM, lars hofhansl  wrote: ...
   Author: Vladimir Rodionov, 2014-04-14, 20:52
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