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olopez32 / ganeti

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implement drbd pause-sync and resume-sync #756

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
What software version are you running? Please provide the output of "gnt-
cluster --version", "gnt-cluster version", and "hspace --version".

root@vserver4:~# gnt-cluster version
Software version: 2.9.5
Internode protocol: 2090000
Configuration format: 2090000
OS api version: 20
Export interface: 0
VCS version: v2.9.5

root@vserver4:~# gnt-cluster --version
gnt-cluster (ganeti v2.9.5) 2.9.5

What distribution are you using?

ubuntu 12.04.4 lts

Please provide any additional information below.

drbdsetup knows pause-sync and resume-sync to pause and resume drbd re-sync. it 
would be great to have a ganeti command to temporarily stop sync activity of 
one or all instance disks. this would be helpful if you create a brunch of 
instances and and disk i/o gets painful slow because of the drbd syncs running. 
with this commands available you could pause the sync until you've done you 
work and resume it later. also running one sync after another (e.g. started via 
at(1)) may improve i/o performance because not all syncs running at once.

regards
heiko

Original issue reported on code.google.com by hei...@googlemail.com on 11 Mar 2014 at 8:02

GoogleCodeExporter commented 9 years ago

Original comment by pud...@google.com on 11 Mar 2014 at 10:04