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https://issues.apache.org/jira/browse/HBASE-4528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur updated HBASE-4528:
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Attachment: appendNoSyncPut5.txt
Fixed typos.
Performance numbers return on hbase-92 with a variant of hdfs 0.20.
vanilla hdfs : 1200 put/sec (no patch),
5000 puts/sec (with patch)
synconsync hdfs : 80 put/sec (no patch)
The synconsync-version-of-hdfs is an internal version of hdfs that makes the
datanode issue a sync() on the corresponding ext3 block file for every
invocation of DFSClient.sync(). This ensures that a hbase transaction is
really,really on disk before the put rpc returns to the client.
> The put operation can release the rowlock before sync-ing the Hlog
> ------------------------------------------------------------------
>
> Key: HBASE-4528
> URL: https://issues.apache.org/jira/browse/HBASE-4528
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Fix For: 0.94.0
>
> Attachments: appendNoSync5.txt, appendNoSyncPut1.txt,
> appendNoSyncPut2.txt, appendNoSyncPut3.txt, appendNoSyncPut4.txt,
> appendNoSyncPut5.txt
>
>
> This allows for better throughput when there are hot rows. A single row
> update improves from 100 puts/sec/server to 5000 puts/sec/server.
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