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[HBASE-7276] [89-fb] Optimize the read/write requests metrics in the RegionServer level - HBase - [issue]
...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...
http://issues.apache.org/jira/browse/HBASE-7276    Author: Liyin Tang , 2017-09-25, 19:05
[HBASE-10275] [89-fb] Guarantee the sequenceID in each Region is strictly monotonic increasing - HBase - [issue]
...HBASE-8741 has implemented the per-region sequence ID. It would be even better to guarantee that the sequencing is strictly monotonic increasing so that HLog-Based Async Replication is able ...
http://issues.apache.org/jira/browse/HBASE-10275    Author: Liyin Tang , 2017-09-25, 19:05
[HBASE-7348] [89-fb] Add some statistics from DFSClient to RegionServerMetrics - HBase - [issue]
...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....
http://issues.apache.org/jira/browse/HBASE-7348    Author: Liyin Tang , 2017-09-25, 19:05
[HBASE-7193] [89-fb] Print the detail exceptions info from the RetriesExhaustedException - HBase - [issue]
...The hbase client only prints the name of exception for the RetriesExhaustedException logging purpose, which failed to provide any useful debug information.So this jira is to enhance the logg...
http://issues.apache.org/jira/browse/HBASE-7193    Author: Liyin Tang , 2017-09-25, 19:05
[HBASE-10784] [89-fb] Avoid the unnecessary memory copy for RowCol and DeleteColumn Bloom filters - HBase - [issue]
...For adding/querying rowcol and deleteColumn BF, there are multiple unnecessary memory copy operations. This jira is to address the concern and avoid creating these dummy bloom keys as much a...
http://issues.apache.org/jira/browse/HBASE-10784    Author: Liyin Tang , 2017-09-25, 19:05
[HBASE-6103] Optimize the HBaseServer to deserialize the data for each ipc connection in parallel - HBase - [issue]
...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...
http://issues.apache.org/jira/browse/HBASE-6103    Author: Liyin Tang , 2016-06-05, 19:46
[HBASE-9102] HFile block pre-loading for large sequential scan - HBase - [issue]
...The current HBase scan model cannot take full advantage of the aggrediate disk throughput, especially for the large sequential scan cases. And for the large sequential scan, it is easy to pr...
http://issues.apache.org/jira/browse/HBASE-9102    Author: Liyin Tang , 2016-01-25, 19:51
[HBASE-4698] Let the HFile Pretty Printer print all the key values for a specific row. - HBase - [issue]
...When using HFile Pretty Printer to debug HBase issues, it would very nice to allow the Pretty Printer to seek to a specific row, and only print all the key values for this row....
http://issues.apache.org/jira/browse/HBASE-4698    Author: Liyin Tang , 2015-12-04, 23:12
[HBASE-3665] checking the number entries in the unit test case - HBase - [issue]
...In the unit test function in HBase-3636, add 2 more assertions to check entry number...
http://issues.apache.org/jira/browse/HBASE-3665    Author: Liyin Tang , 2015-11-20, 05:44
[HBASE-3694] high multiput latency due to checking global mem store size in a synchronized function - HBase - [issue]
...The problem is we found the multiput latency is very high.In our case, we have almost 22 Regions in each RS and there are no flush happened during these puts.After investigation, we believe ...
http://issues.apache.org/jira/browse/HBASE-3694    Author: Liyin Tang , 2015-11-20, 05:42