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[HBASE-6136] Optimize the multi get to be executed in parallel. - HBase - [issue]
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...Currently the multiAction will be executed by one IPC handler thread in the server side. It would be more efficient to optimize the multi get particularly to be executed in parallel since th...
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http://issues.apache.org/jira/browse/HBASE-6136
Author: Liyin Tang,
2013-05-21, 05:01
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RE: Does HBase RegionServer benefit from OS Page Cache - HBase - [mail # user]
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...Hi Enis, Good ideas ! And hbase community is driving on these 2 items. 1) [HBASE-7404]: L1/L2 block cache 2) [HBASE-5263] Preserving cached data on compactions through cache-on-write ...
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Author: Liyin Tang,
2013-03-25, 19:18
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RE: Does HBase RegionServer benefit from OS Page Cache - HBase - [mail # user]
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...Block cache is for uncompressed data while OS page contains the compressed data. Unless the request pattern is full-table sequential scan, the block cache is still quite useful. I think the ...
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Author: Liyin Tang,
2013-03-25, 05:15
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Re: Does HBase RegionServer benefit from OS Page Cache - HBase - [mail # user]
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...We (Facebook) are closely monitoring the OS page cache hit ratio in the production environments. My experience is if your data access pattern is very random, then the OS page cache won't hel...
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Author: Liyin Tang,
2013-03-24, 04:44
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[HBASE-6103] Optimize the HBaseServer to deserialize the data for each ipc connection in parallel - HBase - [issue]
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...Currently HBaseServer is running with a single listener thread, which is responsible for accepting the connection, reading the data from network channel, deserializing the data into writable...
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http://issues.apache.org/jira/browse/HBASE-6103
Author: Liyin Tang,
2013-01-16, 00:31
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[HBASE-5776] HTableMultiplexer - HBase - [issue]
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...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...
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http://issues.apache.org/jira/browse/HBASE-5776
Author: Liyin Tang,
2012-12-28, 19:17
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[HBASE-7444] [89-fb] Update the default user name in MiniHBaseCluster - HBase - [issue]
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...Currently we are using $username.hrs.$index as default user name in MiniHBaseCluster, which actually is not a legal user name....
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http://issues.apache.org/jira/browse/HBASE-7444
Author: Liyin Tang,
2012-12-27, 19:35
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[HBASE-7416] [89-fb] Tier compaction with fixed boundary option - HBase - [issue]
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...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...
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http://issues.apache.org/jira/browse/HBASE-7416
Author: Liyin Tang,
2012-12-22, 01:23
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[HBASE-7348] [89-fb] Add some statistics from DFSClient to RegionServerMetrics - HBase - [issue]
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...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....
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http://issues.apache.org/jira/browse/HBASE-7348
Author: Liyin Tang,
2012-12-13, 19:32
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[HBASE-7276] [89-fb] Optimize the read/write requests metrics in the RegionServer level - HBase - [issue]
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...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...
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http://issues.apache.org/jira/browse/HBASE-7276
Author: Liyin Tang,
2012-12-04, 23:18
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