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[HBASE-7106] [89-fb] Fix the NPE in unit tests for JDK7 - HBase - [issue]
...In JDK7, it will throw out NPE if put a NULL into a TreeSet. And in the unit tests, user can add a NULL as qualifier into the family map for GET or SCAN. So we shall do the followings: 1) Ma...
http://issues.apache.org/jira/browse/HBASE-7106    Author: Liyin Tang, 2014-06-08, 23:07
[HBASE-6911] [89-fb] Set the logging for the location cache hit in the hbase client as trace level - HBase - [issue]
...It is too much logging for each row-location cache hit in the hbase client. So set it as the trace level....
http://issues.apache.org/jira/browse/HBASE-6911    Author: Liyin Tang, 2014-06-08, 23:07
[HBASE-10343] Write the last sequence id into the HLog during the RegionOpen time - HBase - [issue]
...HLog based async replication has a challenging to guarantee the in-order delivery when the Region is moving from one HLog stream to another HLog stream. One approach is to keep the last_sequ...
http://issues.apache.org/jira/browse/HBASE-10343    Author: Liyin Tang, 2014-05-27, 04:52
[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, 2014-03-18, 18:35
[HBASE-10659] [89-fb] Optimize the threading model in HBase write path - HBase - [issue]
...Recently, we have done multiple prototypes to optimize the HBase (0.89)write path. And based on the simulator results, the following model is able to achieve much higher overall throughput w...
http://issues.apache.org/jira/browse/HBASE-10659    Author: Liyin Tang, 2014-03-06, 01:41
[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, 2014-03-05, 10:55
[HBASE-10502] [89-fb] ParallelScanner: a client utility to perform multiple scan requests in parallel. - HBase - [issue]
...ParallelScanner is a utility class for the HBase client to perform multiple scan requests in parallel. It requires all the scan requests having the same caching size for the simplicity purpo...
http://issues.apache.org/jira/browse/HBASE-10502    Author: Liyin Tang, 2014-02-11, 18:58
[HBASE-10360] [89-fb] Expose the HRegionLocations for each HTable in an efficient way - HBase - [issue]
...HTable.getHRegionInfo() will return all the RegionServer address for each HRegion by scanning the META table. Actually, the HConnectionManger could cache these data and refresh the client lo...
http://issues.apache.org/jira/browse/HBASE-10360    Author: Liyin Tang, 2014-01-16, 01:39
[HBASE-10342] RowKey Prefix Bloom Filter - HBase - [issue]
...When designing HBase schema for some use cases, it is quite common to combine multiple information within the RowKey. For instance, assuming that rowkey is constructed as md5(id1) + id1 + id...
http://issues.apache.org/jira/browse/HBASE-10342    Author: Liyin Tang, 2014-01-15, 18:49
[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, 2014-01-15, 06:25
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