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https://issues.apache.org/jira/browse/HBASE-5954?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13532941#comment-13532941
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Lars Hofhansl commented on HBASE-5954:
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We can make this arbitrarily complicated. :)
A flush or deferred log flush gets us pretty far. It'll flush the data to the
data nodes, which will then asynchronously (but ASAP) flush it to the OS
buffers. In Linux the dirty page cache is periodically flushed to disk (that
can be configured - default is 30s). I am not sure what else you want?
sync'ing only really makes sense (IMHO) when it is done synchronously.
> Allow proper fsync support for HBase
> ------------------------------------
>
> Key: HBASE-5954
> URL: https://issues.apache.org/jira/browse/HBASE-5954
> Project: HBase
> Issue Type: Improvement
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Attachments: 5954-trunk-hdfs-trunk.txt, 5954-trunk-hdfs-trunk-v2.txt,
> 5954-trunk-hdfs-trunk-v3.txt, 5954-trunk-hdfs-trunk-v4.txt,
> 5954-trunk-hdfs-trunk-v5.txt, 5954-trunk-hdfs-trunk-v6.txt, hbase-hdfs-744.txt
>
>
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