[pve-devel] Speed up PVE Backup

[Stefan Priebe - Profihost AG]

Hi,

is there any way to speed up PVE Backups?

I'm trying to evaluate the optimal method doing backups but they took
very long.

I'm trying to use vzdump on top of nfs on top of btrfs using zlib
compression.

The target FS it totally idle but the backup is running at a very low speed.

The output after 15 minutes is:
INFO: starting new backup job: vzdump 132 --remove 0 --mode snapshot
--storage vmbackup --node 1234
INFO: Starting Backup of VM 132 (qemu)
INFO: status = running
INFO: update VM 132: -lock backup
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: snapshots found (not included into backup)
INFO: creating archive
'/mnt/pve/vmbackup/dump/vzdump-qemu-132-2016_02_16-09_05_28.vma'
INFO: started backup task 'e75cc760-2be6-4731-b65b-f78b2832baf9'
INFO: status: 0% (79036416/1073741824000), sparse 0% (10665984),
duration 3, 26/22 MB/s
INFO: status: 1% (10742530048/1073741824000), sparse 0% (6539657216),
duration 411, 26/10 MB/s
INFO: status: 2% (21485322240/1073741824000), sparse 1% (17281466368),
duration 820, 26/0 MB/s

This is PVE 3.4 running Qemu 2.4

Greets,
Stefan