Date: Tue, 19 Jan 1999 15:15:37 -0600 (CST) From: "Jasper O'Malley" <jooji@webnology.com> To: Bill Hamilton <billh@finsco.com> Cc: freebsd questions <freebsd-questions@FreeBSD.ORG> Subject: Re: softupdates Message-ID: <Pine.LNX.4.02.9901191502160.15421-100000@mercury.webnology.com> In-Reply-To: <36A4CFCC.888D2627@finsco.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, 19 Jan 1999, Bill Hamilton wrote:
> I've seen recommendations of using softupdates and noatime to speed up
> make world.
> The noatime is an option of mount(8). How do you turn on softupdates?
You'll need the latest copies of your kernel and contrib sources. Once you
have those:
cd /sys/ufs/ffs
ln -s /usr/src/contrib/sys/softupdates/softdep.h
ln -s /usr/src/contrib/sys/softupdates/ffs_softdep.h
Add the line:
options SOFTUPDATES
to your kernel config file, config it, and remake your kernel. Reboot.
To enable softupdates for a filesystem, unmount the filesystem, and run:
tunefs -n enable <raw device of filesystem's partition>
Then remount the filesystem.
> Is this the same as async?
Nope. It should be as fast as async, though.
> How bad can you hose yourself?
With async? Bad. With softupdates? You can't, especially, AFAIK.
> If I have a separate slice for each of / and /var and /usr, I can do
> these options just on the non-root slices and get some speedup and not risk
> root, correct?
Yes.
Cheers,
Mick
The Reverend Jasper P. O'Malley dotdot:jooji@webnology.com
Systems Administrator ringring:asktheadmiral
Webnology, LLC woowoo:http://www.webnology.com/~jooji
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.LNX.4.02.9901191502160.15421-100000>