Anoop Sam John
Stephen Yuan Jiang
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[HBASE-3856] Build a tree structure data block index inside of the HFile
...The motivation is the data block index is too large to hold into memory. In our cases, each region server hold almost 6G block index in the memory. So we propose to build a tree structure da...
, 2013-05-01, 19:29
...There is a known issue in HBase client that single slow/dead region server could slow down the multiput operations across all the region servers. So the HBase client will be as slow as the s...
, 2012-12-28, 19:17
[HBASE-7444] [89-fb] Update the default user name in MiniHBaseCluster
...Currently we are using $username.hrs.$index as default user name in MiniHBaseCluster, which actually is not a legal user name....
, 2012-12-27, 19:35
[HBASE-7416] [89-fb] Tier compaction with fixed boundary option
...Currently, in tier compaction the aged-based algorithm considers HFile's age in disk relative to the current time, thus the tiers are actually shifting along the time. In order to best use o...
, 2012-12-22, 01:23
[HBASE-7348] [89-fb] Add some statistics from DFSClient to RegionServerMetrics
...DFSClient actually collected a number of useful statistics such as bytesLocalRead, bytesLocalRackRead and so on. So this diff is going to merge these metrics into the RegionServerMetrics....
, 2012-12-13, 19:32
[HBASE-7276] [89-fb] Optimize the read/write requests metrics in the RegionServer level
...In HBase, each RegionServer will host a set of Regions and both of them keep track of the read/write requests metrics. So total number of read/write requests among all the Regions shall be e...
, 2012-12-04, 23:18
[HBASE-7267] [89-fb] Only create the dummy hfile for the compaction if necessary.
...In HBASE-6059, it introduced a new behavior that the compaction would create the HFileWriter no mater whether there is any key/value as the output or not. This new behavior actually is confl...
, 2012-12-04, 21:06
[HBASE-7275] [89-fb] Fixing some minor bugs in 89-fb branch
...[89-fb] Fixing some minor bugs in 89-fb branch based on the findBugs report...
, 2012-12-04, 20:04
[HBASE-7164] [89-fb] Using HFileOutputFormat as MapOutputFormat
...Add one more option in TableMapReduceUtil to initialize a Map only job which takes TableInputFormat as MapInputFormat and HFileOutputFormat as MapOutputFormat....
, 2012-11-15, 00:08
[HBASE-5987] HFileBlockIndex improvement
...Recently we find out a performance problem that it is quite slow when multiple requests are reading the same block of data or index. From the profiling, one of the causes is the IdLock conte...
, 2012-11-05, 01:35
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