vzdump and multicore compression

[charon]

Hi,

I have some issues backing up on a remote NFS share. Using compression (gzip/lzo) it take extremely long to backup all machines. During backup not all cores are used for compression.
Is that an issue with vmtar? How can I convince vzdump to use all available cores?


regards

 

[tom]

use lzo, much faster than gzip.

and provide numbers -do tests - I doubt that the single cpu used for compression is the only limiting factor.

 

[charon]

it seems that I have to increase the LVM snapshot size. the backup job runs forever and does not exit with an error. I had a job running for 2 days (backup of a 1 TB VM on a local 1 GB NFS share)
I'll try again with lzo compression and increased snapshot size.