DragonFly users List (threaded) for 2010-04
Re: Disabling snapshot symlinks during manual snapshot
On Wed, Apr 21, 2010 at 11:04 PM, Matthew Dillon
> Make sure your cron job runs the rsync under a lockf. e.g.:
> */5 * * * * lockf -kt 0 /root/adm/.lock1 rsync ....
> Otherwise any long syncs or other issues can cause rsyncs to build
Oh yes you taught me that trick for running the script checking and
restarting mirror-stream process.
I use it now where ever I can :-)
> :I shared /Backup1/www-5mbak read only using samba and the developers
> :can now get 5mis backup of any file for 2 days.
> I'm not I understand. So the snapshots in this subdirectory are
> softlinks using absolute paths to the original directory with
> an @@ extension? Otherwise they might not be able to access the
Yes the snapshot Directory is set to
hammer snapshot /Backup1/www-5mbak/www-hot /Backup1/www-5mbak
So in the snapshot Directory you get snapshots such as
dfly-bkpsrv# ls -l
lrwxr-xr-x 1 root wheel 47 Apr 21 11:03 snap-20100421-1103 ->
lrwxr-xr-x 1 root wheel 47 Apr 21 11:10 snap-20100421-1110 ->
The pfs is mounted inside the snapshot Directory.
For a MS Windows user it will look like the actual pic below.
Clicking on the snapshot Directory they can get the snapshot contents :-)
> :To give them a daily backup access the same way I guess i will have to
> :configure a mirror and configure daily snapshots for them right?
> You can use the same mirror and just pick out or generate daily
> softlinks. You don't need to configure another one. I'm not
> entirely sure how you'd make sure the softlinks track the actual
> snapshots in terms of snapshot retirement as the hammer utility
> only tracks one snapshot directory.
I plan to configure a Slave mirror on another Disk for this PFS. I can
then snapshot it Daily and Share the Snapshot Links Directory using
another Samba Share.
Suppose I configure the prune-min period of the Slave pfs as 2d.
Will I be able to generate 5 min snapshots from it of the previous day
from it should I lose the Master PFS Disk?
I mean if you have the history retained for 2 days can you create
snapshots of the filesystem of a previous time?
> :I might get rid of backuppc if I can store at least 2 years worth of
> :Daily backups like this.
> You always want a backup on some other machine somewhere, no matter
OK then :-)
> :Is there any way to find the space used by a single PFS and the space
> :used by its snapshots ?
> No, someone would have to write a feature in the hammer utility to
> calculate it.
Alright Thanks :-)