Date: Thu, 22 Jun 2006 11:45:52 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: freebsd-current@FreeBSD.org, freebsd-fs@FreeBSD.org, freebsd-geom@FreeBSD.org Subject: Re: Journaling UFS with gjournal. Message-ID: <20060622094552.GC30568@garage.freebsd.pl> In-Reply-To: <20060620173339.GA1638@roadrunner.informatik.uni-wuerzburg.de> References: <20060619131101.GD1130@garage.freebsd.pl> <20060620173339.GA1638@roadrunner.informatik.uni-wuerzburg.de>
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[-- Attachment #1 --] On Tue, Jun 20, 2006 at 07:33:39PM +0200, Ulrich Spoerlein wrote: +> Pawel Jakub Dawidek wrote: +> > Reading. grep -r on two src/ directories in parallel: +> > UFS: 84s +> > UFS+SU: 138s +> > gjournal(1): 102s +> > gjournal(2): 89s +> > +> > As you can see, even on one disk, untaring eight src.tgz is two times +> > faster than UFS+SU. I've no idea why gjournal is faster in reading. +> +> The UFS+SU score doesn't seem right. Why do SU have a negative impact on +> read performance? Is it solely because of the atime updates? As I said, I've not idea. You may simply ignore my benchmarks and try them on your own:) -- Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFEmmbQForvXbEpPzQRAjOhAJ9HYmJq9Mnk9C7okc6eR5sxED6o5wCfW+MI /SRcuCebXaP1hRN/30tbW+Q= =ktIy -----END PGP SIGNATURE-----help
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