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[HBASE-6813] Optimise the time spent holding the updateLock under log roll - HBase - [issue]
...Log roll entails syncing the old log, closing it and creating a new log file.We currently do all the 3 steps while holding the updateLock. This causes latency spikes for puts during this tim...
http://issues.apache.org/jira/browse/HBASE-6813    Author: Amitanand Aiyer, 2013-03-25, 18:28
[HBASE-5941] improve multiDelete performance by grabbing locks ahead of time - HBase - [issue]
...Ning reported that the performance of deletes is slower than the performance of Puts. This should not be the case. On digging up, it turns out that there is a difference between multiPut and...
http://issues.apache.org/jira/browse/HBASE-5941    Author: Amitanand Aiyer, 2013-03-24, 05:37
[HBASE-6388] Avoid potential data loss if the flush fails during regionserver shutdown - HBase - [issue]
...During a controlled shutdown, Regionserver deletes HLogs even if HRegion.close() fails. We should not be doing this....
http://issues.apache.org/jira/browse/HBASE-6388    Author: Amitanand Aiyer, 2013-03-24, 05:21
[HBASE-6840] SplitLogManager should reassign tasks even on a clean RS shutdown. - HBase - [issue]
...SplitLogManager does not reassign tasks if the regionserver does a cleanshutdown. We should reassign the task even if there is a clean shutdown.This is a problem if the shutting down RS is t...
http://issues.apache.org/jira/browse/HBASE-6840    Author: Amitanand Aiyer, 2013-03-24, 05:20
[HBASE-4645] Edits Log recovery losing data across column families - HBase - [issue]
...There is a data loss happening (for some of the column families) when we do the replay logs.The bug seems to be from the fact that during replay-logs we only choose to replaythe logs from th...
http://issues.apache.org/jira/browse/HBASE-4645    Author: Amitanand Aiyer, 2013-03-24, 05:18
[HBASE-6629] [0.89-fb] Fast fail client operations if the regionserver is repeatedly unreachable. - HBase - [issue]
...We have seen occassional RSW reboots in the production cluster. On the client end, the reduction in the operation throughput is a lot more than the %-age of nodes disconnected. This is becau...
http://issues.apache.org/jira/browse/HBASE-6629    Author: Amitanand Aiyer, 2013-03-24, 05:15
[HBASE-5241] Deletes should not mask Puts that come after it. - HBase - [issue]
...Suppose that we have a delete row, and then followed by the put. The delete rowcan mask the put, unless there was a major compaction in between.Now that we are flushing the memstoreTS to dis...
http://issues.apache.org/jira/browse/HBASE-5241    Author: Amitanand Aiyer, 2013-02-22, 13:29
[HBASE-7852] Ensure that command line options to override configs are respected during load incremental hfiles - HBase - [issue]
http://issues.apache.org/jira/browse/HBASE-7852    Author: Amitanand Aiyer, 2013-02-14, 23:46
[HBASE-7242] Use Runtime.exit() instead of Runtime.halt() upon HLog Sync failures - HBase - [issue]
...Hey Guys,  Should we use Runtime.exit() instead of Runtime.halt(), when we fail a Hlog sync.  The key difference is that Runtime.exit() is going to invoke the shutdown hooks; ...
http://issues.apache.org/jira/browse/HBASE-7242    Author: Amitanand Aiyer, 2012-12-02, 02:42
[HBASE-7198] fix lastSeqId logic in regionserver - HBase - [issue]
http://issues.apache.org/jira/browse/HBASE-7198    Author: Amitanand Aiyer, 2012-11-21, 00:02
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB