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[HBASE-7267] [89-fb] Only create the dummy hfile for the compaction if necessary. - HBase - [issue]
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...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...
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http://issues.apache.org/jira/browse/HBASE-7267
Author: Liyin Tang,
2012-12-04, 21:06
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[HBASE-7275] [89-fb] Fixing some minor bugs in 89-fb branch - HBase - [issue]
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...[89-fb] Fixing some minor bugs in 89-fb branch based on the findBugs report...
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http://issues.apache.org/jira/browse/HBASE-7275
Author: Liyin Tang,
2012-12-04, 20:04
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[HBASE-7266] [89-fb] Using pread for non-compaction read request - HBase - [issue]
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...There are 2 kinds of read operations in HBase: pread and seek+read.Pread, positional read, is stateless and create a new connection between the DFSClient and DataNode for each operation. Whi...
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http://issues.apache.org/jira/browse/HBASE-7266
Author: Liyin Tang,
2012-12-04, 03:02
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[HBASE-7193] [89-fb] Print the detail exceptions info from the RetriesExhaustedException - HBase - [issue]
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...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...
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http://issues.apache.org/jira/browse/HBASE-7193
Author: Liyin Tang,
2012-11-20, 01:48
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[HBASE-7106] [89-fb] Fix the NPE in unit tests for JDK7 - HBase - [issue]
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...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...
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http://issues.apache.org/jira/browse/HBASE-7106
Author: Liyin Tang,
2012-11-17, 17:45
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[HBASE-7164] [89-fb] Using HFileOutputFormat as MapOutputFormat - HBase - [issue]
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...Add one more option in TableMapReduceUtil to initialize a Map only job which takes TableInputFormat as MapInputFormat and HFileOutputFormat as MapOutputFormat....
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http://issues.apache.org/jira/browse/HBASE-7164
Author: Liyin Tang,
2012-11-15, 00:08
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[HBASE-5987] HFileBlockIndex improvement - HBase - [issue]
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...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...
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http://issues.apache.org/jira/browse/HBASE-5987
Author: Liyin Tang,
2012-11-05, 01:35
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[HBASE-6968] Several HBase write perf improvement - HBase - [issue]
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...Here are 2 hbase write performance improvements recently:1) Avoid creating HBaseConfiguraiton object for each HLog. Every time when creating a HBaseConfiguraiton object, it would parse the x...
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http://issues.apache.org/jira/browse/HBASE-6968
Author: Liyin Tang,
2012-10-27, 00:46
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[HBASE-6930] [89-fb] Avoid acquiring the same row lock repeatedly - HBase - [issue]
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...When processing the multiPut, multiMutations or multiDelete operations, each IPC handler thread tries to acquire a lock for each row key in these batches. If there are duplicated row keys in...
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http://issues.apache.org/jira/browse/HBASE-6930
Author: Liyin Tang,
2012-10-22, 05:40
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[HBASE-5032] Add other DELETE type information into the delete bloom filter to optimize the time range query - HBase - [issue]
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...To speed up time range scans we need to seek to the maximum timestamp of the requested range,instead of going to the first KV of the (row, column) pair and iterating from there. If we don't ...
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http://issues.apache.org/jira/browse/HBASE-5032
Author: Liyin Tang,
2012-10-17, 04:26
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