Re: SCSI vs. IDE performance test

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Martijn van Oosterhout <kleptog(at)svana(dot)org>
Cc: Rick Gigger <rick(at)alpinenetworking(dot)com>, pgsql-general(at)postgresql(dot)org
Subject: Re: SCSI vs. IDE performance test
Date: 2003-10-28 05:44:45
Message-ID: 19764.1067319885@sss.pgh.pa.us
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Martijn van Oosterhout <kleptog(at)svana(dot)org> writes:
> Well, some googleing around seems to indicate that Serial ATA I/ATA-6 has
> Tagged Command Queueing (TCQ) which is adding this feature specifically.
> Whether it is a mandatory part of the spec I don't know.

Yeah? If so, and *if fully implemented* on both sides of the interface,
this would eliminate the architectural advantages I was just sketching
for SCSI. I can't claim to be up on what's happening in the IDE/ATA
world though...

regards, tom lane

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