Re: SCSI vs. IDE performance test

Tom Lane <tgl@sss.pgh.pa.us>

From: Tom Lane <tgl@sss.pgh.pa.us>
To: Martijn van Oosterhout <kleptog@svana.org>
Cc: Rick Gigger <rick@alpinenetworking.com>, pgsql-general@postgresql.org
Date: 2003-10-28T05:44:45Z
Lists: pgsql-general
Martijn van Oosterhout <kleptog@svana.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