[Leaplist] backup application

[Kevin Korb]

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I use rsync and hard links as well but with scripts I wrote not
something like dirvish.

However, at work I have also been using rsync to OpenSolaris servers
with ZFS.  Unlike LVM2 in Linux ZFS can do many snapshots of a volume so
I can simply snapshot the backup volume before each backup run instead
of dealing with so many hard links.  When we first started testing this
the old Linux backup system took about 20 minutes to backup a web server
and about 3 hours to rotate and purge the hard links.  ZFS on
OpenSolaris did the snapshot generation and deletion in less than 1
second.  The problem with the hard link approach is that there is just
so much work in the filesystem metadata that it can take forever if you
have lots of small files.

I really didn't like switching from Linux to OpenSolaris for backups but
there just isn't a way Linux can compare with those results.  Perhaps
brtfs will fix that some day.

Jason Boxman wrote:
> For years I have been using Dirvish.  I am curious what else is being used for 
> network backups of predominately GNU/Linux hosts?
> 
> The only thing I really wish I had was differential storage.  Traditional Unix 
> hardlinks is what Dirvish uses via options to `rsync`.  I wish you could save 
> the network deltas Dirvish sends.  Maybe snapshotting the LVM LV every day?
> 
> Anyone have `rsync` successfully copying extended filesystem attributes?  I 
> have a Samba install configured to use extended attrs for the DOS attribute 
> flags, instead of allowing it to abuse the filesystem permissions.
> 
> 

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	Kevin Korb			Phone:    (407) 252-6853
	Systems Administrator		Internet:
	FutureQuest, Inc.		Kevin at FutureQuest.net  (work)
	Orlando, Florida		kmk at sanitarium.net (personal)
	Web page:			http://www.sanitarium.net/
	PGP public key available on web site.
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