[linux-lvm] Any way to speed up activation of volumes with snapshots?
chris.friesen at windriver.com
Wed Sep 16 15:30:31 UTC 2015
On 09/16/2015 02:27 AM, Zdenek Kabelac wrote:
> Dne 16.9.2015 v 01:03 Chris Friesen napsal(a):
>> As a side question, currently we have a script which runs "vgchange -ay <vg>",
>> which will activate the VG.
>> This script appears to activate the LVs within the VG serially rather than in
>> parallel. Does it do any processing to determine in which order to activate
>> the LVs?
> What you can do with recent versions of lvm2 - you could 'mark' (with lvchange
> --setskipactivation) some LVs to be skipped from normal activation.
> Then you could activate such skipped LVs with 'lvchange -ay -K'.
> As said lvm2 has not been designed for this case.
> (btw during whole activation - your access to VG is actually limited only for
Right...we're planning on testing out thin provisioning but I have to figure out
a band-aid solution for products already in use.
Just to clarify...what does your "access to VG is actually limited only for
'read-only'" mean exactly?
Does it mean:
1) I only have read-only access to the LVs within the VG until all LVs in the VG
2) I only have readonly access to the VG (so I can't add/remove/modify LVs) but
I have read/write access to the LVs within the VG.
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