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From Jeff Zhang <zjf...@gmail.com>
Subject Is it safe enough to write edit log in buffer before writing to disk ?
Date Fri, 11 Jun 2010 01:29:59 GMT
Hi all,

I check the source code of EditLogFileOutputStream, it seems hadoop
will first write edit log to buffer, then flush to disk. I know that
it will improve performance, but in the other hand it will cause the
edit log in buffer lost when the name node is down. So I wonder is it
possible and necessary to let users do configuration in the conf file
to decide whether use buffer or not? Thanks.



-- 
Best Regards

Jeff Zhang

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