On Thu, Nov 05, 2009 at 01:18:48AM -0500, Israel Garcia wrote: > Hi list: > > I'm using this command to create s snapshot of every LV's server, > mount the LV, make a TGZ to a shared folder (NFS), then umount LV > image and remove snapshot LV. The problem is tar backup is extremely > slow (it takes 3 hours to make backup of all servers). > > This is the command I'm using: > > for vps in `cat vps`; do lvcreate -L10G -s -n "$vps"snapshot > /dev/vg0/"$vps".domain-disk && mount /dev/vg0/"$vps"snapshot > /mnt/vmbackup && cd /mnt/vmbackup && nice -n 19 tar pczf > /shared/lvbackups/"$vps"_`date +%F` . && cd ; umount /mnt/vmbackup && > lvremove -f /dev/vg0/"$vps"snapshot;done > > My question is: > How can I make TAR backup faster? is it possible? Is there other > command faster than TGZ in this case? my guess is you have a single threaded process that is getting blocked by the NFS - network being the slowest, previously when copy across nfs (UDP, not tcp), I started 6 rsync to get about 600Mb across the 1G nic. can I suggest looking at rdiff-backup. same process snapshot each lvm and run in parrallel a rdiff-backup of each lv across NFS or instead across ssh with compression ! that would speed it up, by only sending diff information and compression and parallelism alex > > thanks in advance. > -- standards, n.: The principles we use to reject other people's code.
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