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[HBASE-5375] Ensure that compactions use already cached blocks but do not cache new data blocks - HBase - [issue]
...Create a unit test to verify that compactions reuse existing cached blocks but do not thrash the cache with newly read blocks. Also need to verify that we only read every data block once, e....
http://issues.apache.org/jira/browse/HBASE-5375    Author: Mikhail Bautin, 2014-08-08, 19:50
[HBASE-5263] Preserving cached data on compactions through cache-on-write - HBase - [issue]
...We are tackling HBASE-3976 and HBASE-5230 to make sure we don't trash the block cache on compactions if cache-on-write is enabled. However, it would be ideal to reduce the effect compactions...
http://issues.apache.org/jira/browse/HBASE-5263    Author: Mikhail Bautin, 2014-08-08, 19:49
[HBASE-6213] Add metrics for the number of blocks in cache per CF and block type - HBase - [issue]
...We need to know the number of blocks in cache per CF/block type, not just the total size of all blocks of the given type, in order to measure data block encoding efficiency....
http://issues.apache.org/jira/browse/HBASE-6213    Author: Mikhail Bautin, 2014-05-21, 23:30
[HBASE-5601] Add per-column-family data block cache hit ratios - HBase - [issue]
...In addition to the overall block cache hit ratio it would be extremely useful to have per-column-family data block cache hit ratio metrics....
http://issues.apache.org/jira/browse/HBASE-5601    Author: Mikhail Bautin, 2014-05-21, 23:13
[HBASE-5000] Speed up simultaneous reads of a block when block caching is turned off - HBase - [issue]
...With block caching, when one client starts reading a block and another one comes around asking for the same block, the second client waits for the first one to finish reading and returns the...
http://issues.apache.org/jira/browse/HBASE-5000    Author: Mikhail Bautin, 2013-12-12, 21:04
[HBASE-5813] Retry immediately after a NotServingRegionException in a multiput - HBase - [issue]
...After we get some errors in a multiput we invalidate the region location cache and wait for the configured time interval according to the backoff policy. However, if all "errors" in multiput...
http://issues.apache.org/jira/browse/HBASE-5813    Author: Mikhail Bautin, 2013-11-06, 11:50
[HBASE-5261] Update HBase for Java 7 - HBase - [issue]
...We need to make sure that HBase compiles and works with JDK 7. Once we verify it is reasonably stable, we can explore utilizing the G1 garbage collector. When all deployments are ready to mo...
http://issues.apache.org/jira/browse/HBASE-5261    Author: Mikhail Bautin, 2013-09-04, 23:26
[HBASE-4863] Make Thrift server thread pool bounded and add a command-line UI test - HBase - [issue]
...This started as an internal hotfix where we found out that the Thrift server spawned 15000 threads. To bound the thread pool size I added a custom thread pool server implementation called HB...
http://issues.apache.org/jira/browse/HBASE-4863    Author: Mikhail Bautin, 2013-07-12, 12:16
[HBASE-6808] Add the ability to query region flush time and current time to regionserver Thrift API - HBase - [issue]
...In order to do reliable bulk load with WAL turned off through the C++ API we need to be able to query last flush times for all regions on a regionserver as well as the current time on the se...
http://issues.apache.org/jira/browse/HBASE-6808    Author: Mikhail Bautin, 2013-06-28, 17:31
[HBASE-6807] Pass regionserver name from client to Thrift server embedded in the regionserver - HBase - [issue]
...We don't always need to look up region by row on the server side in the Thrift server embedded in the regionserver, because the client already has the region name. We can send the region nam...
http://issues.apache.org/jira/browse/HBASE-6807    Author: Mikhail Bautin, 2013-06-28, 17:29
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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