[linux-lvm] root: Failed query for merging percentage. Aborting merge
zkabelac at redhat.com
Mon Apr 10 10:54:25 UTC 2017
Dne 9.4.2017 v 09:17 Roger Morton napsal(a):
> I wanted to merge a old snap shot (root_snap10) of my root file system back
> into root.
> LV VG Attr LSize Pool Origin Data% Meta% Move
> Log Cpy%Sync Convert
> home_lv kubuntu-vg rwi-aor--- 1000.00g
> root kubuntu-vg owi-aor--- 50.00g
> root_snap10 kubuntu-vg swi-a-s--- 50.00g root 28.42
> root_snap14 kubuntu-vg swi-a-s--- 50.00g root 0.00
In genernal -
Once the merge IS started - you see immediately 'the merged state' and the
blocks are moved in background (they are moved back from COW to origin -
while you already see a device in 'merged-state').
While the merge IS happening you can't merge another LV.
So you need to wait till merge of snap10 is finished (0%).
> sudo lvcreate -s -n root_snap10b -L 50G /dev/kubuntu-vg/root
> Snapshots of an origin that has a merging snapshot is not supported
> So the system still thinks /dev/kubuntu-vg/root is in the middle of merging.
> Which worries me - my root file system might be in some half and half state
> between two different snapshots
As said there is never 'half and half state' - this would clearly never work
;) you can't see old & new data mixed at the same time.
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