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[HBASE-10320] Avoid ArrayList.iterator() ExplicitColumnTracker - HBase - [issue]
...I noticed that in a profiler (sampler) run ScanQueryMatcher.setRow(...) showed up at all.In turns out that the expensive part is iterating over the columns in ExcplicitColumnTracker.reset()....
http://issues.apache.org/jira/browse/HBASE-10320    Author: Lars Hofhansl, 2014-02-26, 04:45
[HBASE-10551] Change local mode back to one RS thread by default - HBase - [issue]
...HBASE-10340/HBASE-9892 changed the default number of RS threads from 1 to 3. This is confusing. This is to set the default back to 1....
http://issues.apache.org/jira/browse/HBASE-10551    Author: Lars Hofhansl, 2014-02-26, 04:45
[HBASE-10249] TestReplicationSyncUpTool fails because failover takes too long - HBase - [issue]
...New issue to keep track of this....
http://issues.apache.org/jira/browse/HBASE-10249    Author: Lars Hofhansl, 2014-02-26, 04:45
[HBASE-10489] TestImportExport fails in 0.94 with Hadoop2 - HBase - [issue]
...With HBASE-10363 fixed, we're now seeing other M/R tests failing.TestImportExport is one of them....
http://issues.apache.org/jira/browse/HBASE-10489    Author: Lars Hofhansl, 2014-02-26, 04:45
[HBASE-10501] Improve IncreasingToUpperBoundRegionSplitPolicy to avoid too many regions - HBase - [issue]
...During some (admittedly artificial) load testing we found a large amount split activity, which we tracked down the IncreasingToUpperBoundRegionSplitPolicy.The current logic is this (from the...
http://issues.apache.org/jira/browse/HBASE-10501    Author: Lars Hofhansl, 2014-02-19, 02:20
[HBASE-10552] HFilePerformanceEvaluation.GaussianRandomReadBenchmark fails sometimes. - HBase - [issue]
...GaussianRandomReadBenchmark generates seek keys by using a Gaussian distribution with the mean of N/2 and a sigma of N/10 (N = number of rows used)  and using this key directly to seek ...
http://issues.apache.org/jira/browse/HBASE-10552    Author: Lars Hofhansl, 2014-02-19, 02:18
[HBASE-10562] Fix TestMultiTableInputFormat for Hadoop 2 in 0.94 - HBase - [issue]
...See parent. This test was removed from 0.95.2.While investigating while it fails in 0.94 with Hadoop2 I found it is extremely slow and uses up a lot of threads.stack, any input?...
http://issues.apache.org/jira/browse/HBASE-10562    Author: Lars Hofhansl, 2014-02-18, 21:50
[HBASE-10505] Import.filterKv does not call Filter.filterRowKey - HBase - [issue]
...The general contract of a Filter is that filterRowKey is called before filterKeyValue.Import is using Filters for custom filtering but it does not called filterRowKey at all. That throws off...
http://issues.apache.org/jira/browse/HBASE-10505    Author: Lars Hofhansl, 2014-02-13, 01:50
[HBASE-7279] Avoid copying the rowkey in RegionScanner, StoreScanner, and ScanQueryMatcher - HBase - [issue]
...Did some profiling again.I we can gain some performance [1] when passing buffer, rowoffset, and rowlength instead of making a copy of the row key.That way we can also remove the row ...
http://issues.apache.org/jira/browse/HBASE-7279    Author: Lars Hofhansl, 2014-02-07, 23:12
[HBASE-10308] TestZKProcedure.testMultiCohortWithMemberTimeoutDuringPrepare fails occasionally - HBase - [issue]
...Seen in 0.94 (both JDK6 and JDK7 builds)Error Message Wanted but not invoked: procedure.sendGlobalBarrierComplete(); -> at org.apache.hadoop.hbase.procedure.TestZKProcedure.waitAndVe...
http://issues.apache.org/jira/browse/HBASE-10308    Author: Lars Hofhansl, 2014-02-03, 19:43
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