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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: More about LogFlusher
Date Fri, 02 Apr 2010 17:03:17 GMT
LogFlusher isn't doing any FS operations, it calls HLog that does them.

HLog calls sync on the SequenceFile.Writer, which is a marker, and
also calls fsSync if you patched your hadoop (and replaced the hbase's
hadoop jar with the patched one) with HDFS-200,826,142.

J-D

On Fri, Apr 2, 2010 at 2:05 AM, ChingShen <chingshenchen@gmail.com> wrote:
> Hi,
>
>  Does anyone know more about the
> org.apache.hadoop.hbase.regionserver.LogFlusher?
>  I don't know why does it just invoke SequenceFile.Writer.sync()? It just
> writes a maker into the file.
> Can anyone explain it to me please?
>
> Thanks.
>
> Shen
>

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