vzdump speed

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obrienmd

Member
Oct 14, 2009
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A couple of questions about Proxmox 1.5 (2.6.32) kvm backups via vzdump:

1) While the log shows that vzdump is limited to 10240 KB/s, my lvm snapshot backups finish with speeds ranging from 10.19 MiB/s to 22.39 MiB/s. Given some flexibility to convert from KB to MiB, 10.19 seems about right, but I can't explain all the results (many) so far about 10240 KB/s. Does the limiter really work?

2) If the limiter does indeed work, how can I modify it? I saw a reference to a config file in another thread, but I was not able to find that config file in my Proxmox VE server's etc directory.

Thanks for any help!
 
obrienmd said:
2) If the limiter does indeed work, how can I modify it? I saw a reference to a config file in another thread, but I was not able to find that config file in my Proxmox VE server's etc directory.

Thanks for any help!
Click to expand...

create /etc/vzdump.conf config file with bwlimit=<limit>, se "man vzdump" for list of all options
 
l.mierzwa said:
create /etc/vzdump.conf config file with bwlimit=<limit>, se "man vzdump" for list of all options
Click to expand...

Got it, worked great, I see that the new bw limit is mentioned in the vzdump log e-mailed to me. However, the limit is still not being honored (ie MiB/s speed mentioned after "Total bytes written: xxxxx" still often exceeds bw limit by unreasonable amount). Thoughts?
 
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