[Debian-uk] OT: What's required for a debian based small business server?

[Simon Waters]

Joel Merrick wrote:
> 
> Ahh, I see. It's possible to snapshot using LVM (1) (something else
> that I learnt today!).. XFS just has extra tools to freeze the
> filesystem first. (2)
> 
> It seems as though you just freeze using xfs_freeze and then snapshot
> the system and then unfreeze.

Seems my XFS comment was both right, and out of date ;)

xfs-freeze has gone (assuming your kernel is recent, it is all done by
magic when you need it these days!).

A quick check in the 2.6.20 source code suggests that this is now done
by the file system super_lockfs code, which is implemented in;

ext3, ext4, gfs2, jfs, reiserfs, xfs

The ntfs code has;
  //.write_super_lockfs   = NULL,         /* ? */
Which I guess won't do the job ;)

Nothing here says anything about the maturity of the implementations,
but I guess you pays your money to Linus and friends, and takes your pick.

2.6.15 kernel I checked didn't have this for ext4, or gfs2, so I'd guess
they might not be the wisest choices for betting the enterprise
snapshots on just yet.