Re: [BackupPC-users] dd/tar/dump (was: BackupPC-users Digest, Vol 21, Issue 4)

2008-01-07 Thread Andreas Micklei
Am Montag, 7. Januar 2008 schrieb Carl Wilhelm Soderstrom: > On 01/04 09:51 , Paul Archer wrote: > > [lvm snapshot] Snapshots are stil on my Todo list and probably also a good approach to backing up a BackupPc Server. I went for the stop-every-daemon and dump-the-whole-disk solution because it w

Re: [BackupPC-users] dd/tar/dump

2008-01-07 Thread Carl Wilhelm Soderstrom
On 01/07 07:47 , Les Mikesell wrote: > Since it works at the > partition image level it shouldn't have the usual problems with > hardlinks and it might be possible to use the underlying tool against an > lvm snapshot without having to shut down. if you make an image of an LVM snapshot, you migh

Re: [BackupPC-users] dd/tar/dump

2008-01-07 Thread Les Mikesell
Carl Wilhelm Soderstrom wrote: >> We are using LVM2 for our backuppc partition. How much disk space would >> you estimate a snapshot would take for a partition containing ~700Gb of >> data? The LVM partition itself is roughly ~1.4Tb in size. > > Snapshots should be sized based on how much dat

Re: [BackupPC-users] dd/tar/dump

2008-01-07 Thread Carl Wilhelm Soderstrom
On 01/06 01:39 , Sean Carolan wrote: > We are using LVM2 for our backuppc partition. How much disk space would > you estimate a snapshot would take for a partition containing ~700Gb of > data? The LVM partition itself is roughly ~1.4Tb in size. Snapshots should be sized based on how much data

Re: [BackupPC-users] dd/tar/dump (was: BackupPC-users Digest, Vol 21, Issue 4)

2008-01-07 Thread Carl Wilhelm Soderstrom
On 01/04 09:51 , Paul Archer wrote: > If you are using lvm2 (which is pretty common, given the necessary > single-filesystem size for backuppc), then you should be able to take a > snapshot of the logical volume, and backup from that. I've tried that with backing up to tape. Unfortunately, any d

Re: [BackupPC-users] dd/tar/dump

2008-01-06 Thread Sean Carolan
> If you are using lvm2 (which is pretty common, given the necessary > single-filesystem size for backuppc), then you should be able to take a > snapshot of the logical volume, and backup from that. We are using LVM2 for our backuppc partition. How much disk space would you estimate a snapshot

[BackupPC-users] dd/tar/dump (was: BackupPC-users Digest, Vol 21, Issue 4)

2008-01-04 Thread Paul Archer
3:31pm, Andreas Micklei wrote: > Am Freitag, 4. Januar 2008 schrieb Carl Wilhelm Soderstrom: >> On 01/03 09:46 , dan wrote: >>> i doubt that dd will do much better than tar, >> >> With the backuppc data pool, dd'ing the disk partition is several times >> faster than tar because it doesn't do all t