Date: Thu, 9 Jan 1997 17:49:05 -0400 (AST) From: The Hermit Hacker <scrappy@hub.org> To: Joe Greco <jgreco@solaria.sol.net> Cc: Joe McGuckin <joe@via.net>, freebsd-hackers@freebsd.org Subject: Re: CCD questions (news server) Message-ID: <Pine.BSF.3.95.970109174611.5112Z-100000@thelab.hub.org> In-Reply-To: <199701092014.OAA07665@solaria.sol.net>
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On Thu, 9 Jan 1997, Joe Greco wrote: > > I just switched over our news machine from a tired old Sun SS2 (with Weitek > > upgrade) to a 133Mhz pentium with 12G of Barracudas ccd'd together, > > > > I arbitrarily set the interleave to 64. Is there a good method to derive > > the optimal interleave factor? > > Yes - search the hackers mailing list archive for usenet, news, ccd, > interleave, etc. and you will find one of my several essays on the subject. > > You are killing your performance with such a low number. > Now I'm curious, what interleave are you using? I don't assume its possible to *change* the interleave once the device is created, is it? I'm running even lower (32), since...well...I didn't know better :( Should maybe add a note to the man page that states a recommended value for a news server, or something like that? :)
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