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https://issues.apache.org/jira/browse/HBASE-1393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-1393:
-------------------------
Attachment: 1393.patch
Remove the HLog.isDeleted and the 'special' HLogEdit.DELETED_BYTES. We don't
do deletes this way anymore.
Added a sleep to regionserver of 1 second on its main loop if is in the
exceeded maximum retries state trying to send report to master.
Changed the datastructures used by HLog. Use concurrentskiplistmap instead of
using a synchronizedSortedMap TreeMap. Should be faster. Changed all counters
to be Atomics. Volatile counters don't work:
http://pitfalls.wordpress.com/2008/05/25/javavolatile/. Got rid of
sequenceLock. We should be able to do without it (We might spin a while
setting it on region open is the price we pay -- in testing haven't seen it).
Narrowed the synchronized section in HLog#append though I don't think it'll
make much difference in scheme of things -- i/o is so big compared.
> Narrow synchronization in HLog
> ------------------------------
>
> Key: HBASE-1393
> URL: https://issues.apache.org/jira/browse/HBASE-1393
> Project: Hadoop HBase
> Issue Type: Improvement
> Environment: Prompted by HBASE-1213, review HLog synchronizations.
> Reporter: stack
> Fix For: 0.20.0
>
> Attachments: 1393.patch
>
>
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