Re: SCSI vs. IDE performance test

From: list-pgsql-general(at)news(dot)cistron(dot)nl ("Miquel van Smoorenburg" )
To: pgsql-general(at)postgresql(dot)org
Subject: Re: SCSI vs. IDE performance test
Date: 2003-10-31 10:51:18
Message-ID: bnter5$730$1@news.cistron.nl
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In article <87n0blgs9g(dot)fsf(at)stark(dot)dyndns(dot)tv>,
Greg Stark <gsstark(at)mit(dot)edu> wrote:
>Currently the linux-kernel folks are talking about how to integrate an IDE
>SYNC operation into the world. It looks like filesystems with journals will
>issue an IDE SYNC to checkpoint the journal, but it doesn't really look like
>they're planning to hook it into fsync unless people speak up and explain what
>databases need in that regard. However SYNC flushes the entire cache and means
>that all other writes are blocked until the SYNC completes.
>
>http://www.ussg.iu.edu/hypermail/linux/kernel/0304.1/0450.html

Also, if you're interested in this kind of stuff and what's going on
in the Linux kernel development circles, Google for "ide write barrier".

For example http://lkml.org/lkml/2003/10/13/87

Mike.

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