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[HBASE-9158] Serious bug in cyclic replication - HBase - [issue]
...While studying the code for HBASE-7709, I found a serious bug in the current cyclic replication code. The problem is here in HRegion.doMiniBatchMutation:      Mutation fi...
http://issues.apache.org/jira/browse/HBASE-9158    Author: Lars Hofhansl, 2013-08-21, 01:08
[HBASE-9266] Javadoc: Document that HBaseAdmin.flush(...) is synchronous - HBase - [issue]
...Currently the Javadoc in HBaseAdmin.flush(...) says that this is an asynchronous operation. Looking at the, however, it is in fact not.Having this as a synchronous operation open ups some us...
http://issues.apache.org/jira/browse/HBASE-9266    Author: Lars Hofhansl, 2013-08-20, 02:46
[HBASE-9231] Multipage book is generated to the wrong location - HBase - [issue]
http://issues.apache.org/jira/browse/HBASE-9231    Author: Lars Hofhansl, 2013-08-15, 21:14
[HBASE-6580] Deprecate HTablePool in favor of HConnection.getTable(...) - HBase - [issue]
...Update:I now propose deprecating HTablePool and instead introduce a getTable method on HConnection and allow HConnection to manage the ThreadPool.Initial proposal:Here I propose a very simpl...
http://issues.apache.org/jira/browse/HBASE-6580    Author: Lars Hofhansl, 2013-08-08, 14:42
[HBASE-7801] Allow a deferred sync option per Mutation. - HBase - [issue]
...Won't have time for parent. But a deferred sync option on a per operation basis comes up quite frequently.In 0.96 this can be handled cleanly via protobufs and 0.94 we can have a special mut...
http://issues.apache.org/jira/browse/HBASE-7801    Author: Lars Hofhansl, 2013-07-31, 17:36
[HBASE-9037] LruBlockCache is too verbose at Debug level - HBase - [issue]
...From Stack on the mailing list:I see this every 4ms or so when reading.21 2013-07-24 10:55:24,594 DEBUGorg.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU evictioncompleted; free...
http://issues.apache.org/jira/browse/HBASE-9037    Author: Lars Hofhansl, 2013-07-26, 23:22
[HBASE-8945] Backport to 0.94: HBASE-7952 Remove update() and Improve ExplicitColumnTracker performance. - HBase - [issue]
...ColumnTracker.update() is no longer called from anywhere but a test; we should remove it....
http://issues.apache.org/jira/browse/HBASE-8945    Author: Lars Hofhansl, 2013-07-19, 20:48
[HBASE-8620] Port HBASE-6874 Implement prefetching for scanners from 0.89-fb to 0.94 - HBase - [issue]
...See parent for details and patch,...
http://issues.apache.org/jira/browse/HBASE-8620    Author: Lars Hofhansl, 2013-07-10, 10:48
Re: data loss after cluster wide power loss - HBase - [mail # user]
...HBase is interesting here, because it rewrites old data into new files. So a power outage by default would not just lose new data but potentially old data as well. You can enable "sync on bl...
   Author: Lars Hofhansl, 2013-07-01, 22:47
Re: Poor HBase random read performance - HBase - [mail # dev]
...Cool. That mingles well with the theory. If each read of a KV incurs a bock read reducing the block size by 4 should lead to close to a 4x gain.  W.r.t. the more store files... More KVs...
   Author: Lars Hofhansl, 2013-06-30, 07:45
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