Date: Sun, 17 May 1998 20:53:59 -0700 From: Amancio Hasty <hasty@rah.star-gate.com> To: Atipa <freebsd@atipa.com> Cc: Ollivier Robert <roberto@keltia.freenix.fr>, freebsd-current@FreeBSD.ORG Subject: Re: NOTICE: Softupdates Message-ID: <199805180353.UAA00687@rah.star-gate.com> In-Reply-To: Your message of "Sun, 17 May 1998 20:41:26 MDT." <Pine.BSF.3.96.980517203817.1796A-100000@altrox.atipa.com>
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The short answer :
Yes! softupdates is worth the effort.
Last october, while running with my "/usr" mounted async I blew away my
file structure due to a kernel panic. softupdates allows you to run
with similar functionality as async,noatime however a lot more
safe.
As for the performance improvements several posters have already posted
their figures for real life scenarios such as "make world" and softupdates
is clocking in faster than async.
# pwd
/usr/src/sys/compile/STAR-GATE
I leave with this thought 8)
# pwd
/usr/src/sys/compile/STAR-GATE
# time rm *
0.0u 0.1s 0:00.11 145.4% 198+216k 17+0io 0pf+0w
Cheers,
Amancio
>
> Has this been worth the effort? :)
>
> In other words, how much faster is it than standard mounts, and how much
> faster is it than "async,noatime" mounts?
>
> Although in practice it is still a bit shakey, is it theoretically more
> stable (in life and in unexpected death...) than async mounts?
>
> Kevin
>
> On Sun, 17 May 1998, Amancio Hasty wrote:
>
> > Both of my systems have survived a soft update make world.
> >
> > cioloco (p133) ide drives --- this is my test box
> >
> > rah (PPro 200) UW scsi drives
> >
> >
> > root} uname -a
> > FreeBSD rah.star-gate.com 3.0-CURRENT FreeBSD 3.0-CURRENT #77: Sun May 17
> > 18:09:36 PDT 1998 hasty@rah.star-gate.com:/usr/src/sys/compile/STAR-GATE
> > i386
> >
> > {root} mount
> > /dev/sd0s1a on / (local, writes: sync 123 async 464)
> > devfs on dummy_mount (local)
> > /dev/sd0f on /usr (NFS exported, local, soft-updates, writes: sync 6 async 946)
> > /dev/sd0e on /var (local, writes: sync 440 async 368)
> > procfs on /proc (local)
> >
> >
> > $ uname -a
> > FreeBSD cioloco.star-gate.com 3.0-CURRENT FreeBSD 3.0-CURRENT #14: Sat May 16
> > 23:32:44 PDT 1998 hasty@cioloco.star-gate.com:/usr/src/sys/compile/CIOLOCO
> > i386
> >
> > $ mount
> > /dev/wd0s2a on / (local, writes: sync 605 async 2914))
> > /dev/wd0s2e on /tmp (local, soft-updates, writes: sync 2 async 1503))
> > /dev/wd2g on /usr (local, soft-updates, writes: sync 1947 async 103398))
> > /dev/wd0s2f on /var (local, writes: sync 5402 async 1752))
> > procfs on /proc (local)
> >
> >
> > Tnks Julian and to the rest of the soft-update team.
> >
> > Amancio
> >
> >
> >
> > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > with "unsubscribe freebsd-current" in the body of the message
> >
>
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