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[HBASE-7709] Infinite loop possible in Master/Master replication - HBase - [issue]
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...We just discovered the following scenario: Cluster A and B are setup in master/master replication By accident we had Cluster C replicate to Cluster A.Now all edit originating from C will be ...
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http://issues.apache.org/jira/browse/HBASE-7709
Author: Lars Hofhansl,
2013-05-17, 07:01
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[HBASE-6523] HConnectionImplementation still does not recover from all ZK issues. - HBase - [issue]
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...During some testing here at Salesforce.com we found another scenario where an HConnectionImplementation would never recover from a lost ZK connection....
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http://issues.apache.org/jira/browse/HBASE-6523
Author: Lars Hofhansl,
2013-05-16, 08:39
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[HBASE-8362] Possible MultiGet optimization - HBase - [issue]
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...Currently MultiGets are executed on a RegionServer in a single thread in a loop that handles each Get separately (opening a scanner, seeking, etc).It seems we could optimize this (per region...
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http://issues.apache.org/jira/browse/HBASE-8362
Author: Lars Hofhansl,
2013-05-16, 06:31
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[HBASE-6428] Pluggable Compaction policies - HBase - [issue]
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...For some usecases is useful to allow more control over how KVs get compacted.For example one could envision storing old versions of a KV separate HFiles, which then rarely have to be touched...
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http://issues.apache.org/jira/browse/HBASE-6428
Author: Lars Hofhansl,
2013-05-14, 01:20
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[HBASE-6476] Replace all occurrances of System.currentTimeMillis() with EnvironmentEdge equivalent - HBase - [issue]
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...There are still some areas where System.currentTimeMillis() is used in HBase. In order to make all parts of the code base testable and (potentially) to be able to configure HBase's notion of...
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http://issues.apache.org/jira/browse/HBASE-6476
Author: Lars Hofhansl,
2013-05-07, 19:47
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[HBASE-6755] HRegion.internalObtainRowLock uses unecessary AtomicInteger - HBase - [issue]
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...I was looking at HBase's implementation of locks and saw that is unnecessarily uses an AtomicInteger to obtain a unique lockid.The observation is that we only need a unique one and don't car...
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http://issues.apache.org/jira/browse/HBASE-6755
Author: Lars Hofhansl,
2013-05-07, 19:46
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[HBASE-5746] HFileDataBlockEncoderImpl uses wrong header size when reading HFiles with no checksums (0.96) - HBase - [issue]
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http://issues.apache.org/jira/browse/HBASE-5746
Author: Lars Hofhansl,
2013-05-07, 15:54
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[HBASE-5622] Improve efficiency of mapred vesion of RowCounter - HBase - [issue]
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http://issues.apache.org/jira/browse/HBASE-5622
Author: Lars Hofhansl,
2013-05-02, 04:49
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[HBASE-6116] Allow parallel HDFS writes for HLogs. - HBase - [issue]
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...In HDFS-1783 I adapted Dhrubas changes to be used in Hadoop trunk.This issue will include the necessary reflection changes to optionally enable this for the WALs in HBase....
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http://issues.apache.org/jira/browse/HBASE-6116
Author: Lars Hofhansl,
2013-05-01, 06:47
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[HBASE-7755] Experiment with LAB in BlockEndcoding - HBase - [issue]
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...I was looking at and profiling the BlockEncoding code to figure out how to make it faster. One issue that jumped out was we call ByteBuffer.allocate(...) for each single KV.As an experiment ...
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http://issues.apache.org/jira/browse/HBASE-7755
Author: Lars Hofhansl,
2013-05-01, 06:43
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