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[HBASE-6466] Enable multi-thread for memstore flush - HBase - [issue]
...If the KV is large or Hlog is closed with high-pressure putting, we found memstore is often above the high water mark and block the putting.So should we enable multi-thread for Memstore Flus...
http://issues.apache.org/jira/browse/HBASE-6466    Author: chunhui shen, 2014-04-17, 11:15
[HBASE-7403] Online Merge - HBase - [issue]
...Support executing region merge transaction on Regionserver, similar with split transactionProcess of merging two regions:a.client sends RPC (dispatch merging regions) to masterb.master moves...
http://issues.apache.org/jira/browse/HBASE-7403    Author: chunhui shen, 2014-04-06, 17:51
[HBASE-10196] Enhance HBCK to understand the case after online region merge - HBase - [issue]
...HBCK will report an error now after the online merge,because the files of merging regions still remain on HDFS which will be cleaned by CatalogJanitor later.ERROR: Region { meta => null, ...
http://issues.apache.org/jira/browse/HBASE-10196    Author: chunhui shen, 2014-01-27, 18:23
[HBASE-7404] Bucket Cache:A solution about CMS,Heap Fragment and Big Cache on HBASE - HBase - [issue]
...First, thanks @neil from Fusion-IO share the source code.Usage:1.Use bucket cache as main memory cache, configured as the following:–"hbase.bucketcache.ioengine" "heap" (or "offheap" if usin...
http://issues.apache.org/jira/browse/HBASE-7404    Author: chunhui shen, 2014-01-23, 03:02
[HBASE-9810] Global memstore size will be calculated wrongly if replaying recovered edits throws exception - HBase - [issue]
...Recently we encountered such a case in 0.94-version:Flush is triggered frequently because:DEBUG org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Flush thread woke up because memory abov...
http://issues.apache.org/jira/browse/HBASE-9810    Author: chunhui shen, 2013-12-16, 18:47
[HBASE-8163] MemStoreChunkPool: An improvement for JAVA GC when using MSLAB - HBase - [issue]
...Usage:Disable pool(default): configure "hbase.hregion.memstore.chunkpool.maxsize" as 0Enable pool: configure "hbase.hregion.memstore.chunkpool.maxsize" as a percentage of global memstore siz...
http://issues.apache.org/jira/browse/HBASE-8163    Author: chunhui shen, 2013-11-18, 18:43
[HBASE-9488] Improve performance for small scan - HBase - [issue]
...review board:https://reviews.apache.org/r/14059/Performance ImprovementTest shows about 1.5~3X improvement for small scan where limit<=50 under cache hit ratio=100%.See more performance t...
http://issues.apache.org/jira/browse/HBASE-9488    Author: chunhui shen, 2013-10-22, 07:13
[HBASE-6877] Coprocessor exec result is incorrect when region is in splitting - HBase - [issue]
...When we execute the coprocessor, we will called HTable#getStartKeysInRange first and get the Keys to exec coprocessor,if then some regions are split before execCoprocessor RPC, the Keys are ...
http://issues.apache.org/jira/browse/HBASE-6877    Author: chunhui shen, 2013-10-15, 08:28
[HBASE-6012] Handling RegionOpeningState for bulk assign - HBase - [issue]
...Since HBASE-5914, we using bulk assign for SSHBut in the bulk assign case if we get an ALREADY_OPENED case there is no one to clear the znode created by bulk assign. Another thing, when RS o...
http://issues.apache.org/jira/browse/HBASE-6012    Author: chunhui shen, 2013-10-15, 05:46
[HBASE-8287] TestRegionMergeTransactionOnCluster failed in trunk build #4010 - HBase - [issue]
...From the log of trunk build #4010:2013-04-04 05:45:59,396 INFO  [MASTER_TABLE_OPERATIONS-quirinus.apache.org,53514,1365054344859-0] handler.DispatchMergingRegionHandler(157): Cancel mer...
http://issues.apache.org/jira/browse/HBASE-8287    Author: chunhui shen, 2013-09-23, 20:28
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