Date: Tue, 27 Mar 2001 12:25:11 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Brian Somers <brian@Awfulhak.org> Cc: "David E. O'Brien" <obrien@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sbin/newfs newfs.c Message-ID: <75606.985688711@critter> In-Reply-To: Your message of "Tue, 27 Mar 2001 09:18:32 BST." <200103270818.f2R8IWw48188@hak.lan.Awfulhak.org>
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In message <200103270818.f2R8IWw48188@hak.lan.Awfulhak.org>, Brian Somers write s: >> Log: >> The common wisdom is to use the largest number of cylinders per group. >> So bump the default from `16' to `22', which is the largest value allowed >> with the current default block size. This change increases the the >> group size from 32MB/g to 44MB/g on a 4GB SCSI disk. > >Does this increase performance ? I have seen it increase performance, and I have seen it make no difference but it has never hurt performance for me. I think tuning UFS/FFS is far more tricky than anticipated because parts of our kernel (clustering for instance) seems to prefer the standard block/frag size. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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