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[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
[HBASE-4241] Optimize flushing of the Store cache for max versions and (new) min versions - HBase - [issue]
...As discussed with with Jon, there is room for improvement in how the memstore is flushed to disk.Currently only expired KVs are pruned before flushing, but we can also prune versions if we f...
http://issues.apache.org/jira/browse/HBASE-4241    Author: Lars Hofhansl, 2014-01-31, 21:19
[HBASE-10421] Investigate scan performance in 0.96 and later - HBase - [issue]
...Testing the "internal friction" of scanning in HBase (all data in the block cache, and all rows filtered at the server by a ValueFilter, so that one really measures the work HBase does inter...
http://issues.apache.org/jira/browse/HBASE-10421    Author: Lars Hofhansl, 2014-01-28, 19:28
[HBASE-10420] Replace KV.getBuffer with KV.get{Row|Family|Qualifier|Value|Tags}Array - HBase - [issue]
...We we start by removing KeyValue.getBuffer() in all obvious places.Obvious places are where we access the buffer by getRowOffset() and getRowLength(), etc, since we then now we're cross a ro...
http://issues.apache.org/jira/browse/HBASE-10420    Author: Lars Hofhansl, 2014-01-26, 07:52
[HBASE-10259] [0.94] Upgrade JUnit to 4.11 - HBase - [issue]
...Right now we're using a custom version it seems: 4.10-HBASE-1. Let's upgrade that to 4.11.See parent for rationale....
http://issues.apache.org/jira/browse/HBASE-10259    Author: Lars Hofhansl, 2014-01-21, 01:31
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB