Date: Tue, 22 May 2007 07:33:14 -0700 (PDT) From: Gore Jarold <gore_jarold@yahoo.com> To: Eric Anderson <anderson@freebsd.org>, Dag-Erling "Smørgrav" <des@des.no> Cc: freebsd-fs@freebsd.org, Brooks Davis <brooks@freebsd.org>, Gore Jarold <gore_jarold@yahoo.com> Subject: Re: VERY frustrated with FreeBSD/UFS stability - please help or comment... Message-ID: <468430.96293.qm@web63013.mail.re1.yahoo.com> In-Reply-To: <4652E7F9.10005@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
--- Eric Anderson <anderson@freebsd.org> wrote: > On 05/22/07 06:39, Dag-Erling Smørgrav wrote: > > Gore Jarold <gore_jarold@yahoo.com> writes: > >> Specifically, I have private departmental > fileservers that other > >> fileservers rsync to using Mike Rubel-style rsync > snapshots: > >> > >> > http://www.mikerubel.org/computers/rsync_snapshots/ > >> > >> This means that the remote system runs a script > like this: > >> > >> ssh user@host rm -rf backup.2 > >> ssh user@host mv backup.1 backup.2 > >> ssh user@host cp -al backup.0 backup.1 > >> rsync /files user@host:/backup.0 > > > > This is extremely inefficient, as you have > discovered. > > > > Speaking in the abstract, what you want to do > every day is the > > following: > > > > client1% rsync --archive --delete /vol > server:/backup/client1 > > client2% rsync --archive --delete /vol > server:/backup/client2 > > server% for vol in /backup/* ; do mksnap_ffs $vol > $vol/.snap/`date` ; done > > > > No copying or deleting; you take a snapshot when > the rsync job is done, > > and the next day you rsync again to the same > directory; only what has > > actually changed will be transferred, and there is > no need to create and > > populate full copies of each directory tree every > time. > > > That's good for small file systems, but if you have > a multi-terabyte > file system, you're not going to be too happy about > those results. The > snapshot will take a *very* long time, on a nearly > full file system. And in addition, you're using snapshots, which adds a lot more instability, IMO. There are many PRs (most solved, I hope) that indicate instability running snapshots, not to mention the risk of filling a filesystem accidently, etc. ____________________________________________________________________________________ Never miss an email again! Yahoo! Toolbar alerts you the instant new Mail arrives. http://tools.search.yahoo.com/toolbar/features/mail/
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?468430.96293.qm>