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[HBASE-10378] Divide HLog interface into User and Implementor specific interfaces - HBase - [issue]
...HBASE-5937 introduces the HLog interface as a first step to support multiple WAL implementations. This interface is a good start, but has some limitations/drawbacks in its current state, suc...
http://issues.apache.org/jira/browse/HBASE-10378    Author: Himanshu Vashishtha, 2014-08-27, 21:35
[HBASE-10577] Remove unnecessary looping in FSHLog - HBase - [issue]
...In the new disruptor based FSHLog, the Syncer threads are handed a batch of SyncFuture objects from the RingBufferHandler. The Syncer then invokes a sync call on the current writer instance....
http://issues.apache.org/jira/browse/HBASE-10577    Author: Himanshu Vashishtha, 2014-07-31, 07:41
[HBASE-10278] Provide better write predictability - HBase - [issue]
...Currently, HBase has one WAL per region server. Whenever there is any latency in the write pipeline (due to whatever reasons such as n/w blip, a node in the pipeline having a bad disk, etc),...
http://issues.apache.org/jira/browse/HBASE-10278    Author: Himanshu Vashishtha, 2014-07-30, 20:18
[HBASE-3607] Cursor functionality for results generated by Coprocessors - HBase - [issue]
...I tried to come up with a scanner like functionality for results generated by coprocessors at region level. This is just a poc, and it will be good to have your comments on it.It has support...
http://issues.apache.org/jira/browse/HBASE-3607    Author: Himanshu Vashishtha, 2014-07-18, 23:02
[HBASE-8402] ScanMetrics depends on number of rpc calls to the server. - HBase - [issue]
...Currently, scan metrics is not published in case there is one trip to server. I was testing it on a small row range (200 rows) with a large cache value (1000). It doesn't look right as metri...
http://issues.apache.org/jira/browse/HBASE-8402    Author: Himanshu Vashishtha, 2014-02-22, 03:26
[HBASE-10563] Set name for FlushHandler thread - HBase - [issue]
...The FlushHandler thread in MemStoreFlusher class uses default thread name (Thread -XX). This is un-intentional and also confusing in case when there are multiple handlers.Current Stack trace...
http://issues.apache.org/jira/browse/HBASE-10563    Author: Himanshu Vashishtha, 2014-02-19, 02:20
[HBASE-8741] Scope sequenceid to the region rather than regionserver (WAS: Mutations on Regions in recovery mode might have same sequenceIDs) - HBase - [issue]
...Currently, when opening a region, we find the maximum sequence ID from all its HFiles and then set the LogSequenceId of the log (in case the later is at a small value). This works good in re...
http://issues.apache.org/jira/browse/HBASE-8741    Author: Himanshu Vashishtha, 2014-01-04, 05:31
[HBASE-8028] Append, Increment: Adding rollback support - HBase - [issue]
...In case there is an exception while doing the log-sync, the memstore is not rollbacked, while the mvcc is always forwarded to the writeentry created at the beginning of the operation. This m...
http://issues.apache.org/jira/browse/HBASE-8028    Author: Himanshu Vashishtha, 2013-12-16, 20:37
[HBASE-10004] Some fixes for scoping sequence Ids to region level - HBase - [issue]
...While looking at trunk, I figured out some issues related to fix provided in HBASE-8741. This jira is to fix them:1) Not so helpful log message in FSHLog#getFileNumFromFileName.2) HLogPE ver...
http://issues.apache.org/jira/browse/HBASE-10004    Author: Himanshu Vashishtha, 2013-11-21, 00:31
Re: Uneven write request to regions - HBase - [mail # user]
...Re: "The 32 limit makes HBase go into stress mode, and dump all involving regions contains in those 32 WAL Files."  Pardon, I haven't read all your data points/details thoroughly, but t...
   Author: Himanshu Vashishtha, 2013-11-20, 01:05
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