[linux-lvm] Snapshot behavior on classic LVM vs ThinLVM

Gionatan Danti g.danti at assyoma.it
Fri Apr 14 09:07:53 UTC 2017

Il 14-04-2017 10:24 Zdenek Kabelac ha scritto:
> But it's currently impossible to expect you will fill the thin-pool to
> full capacity and everything will continue to run smoothly - this is
> not going to happen.

Even with EXT4 and errors=remount-ro?

> However there are many different solutions for different problems -
> and with current script execution - user may build his own solution -
> i.e.  call
> 'dmsetup remove -f' for running thin volumes - so all instances get
> 'error' device   when pool is above some threshold setting (just like
> old 'snapshot' invalidation worked) - this way user will just kill
> thin volume user task, but will still keep thin-pool usable for easy
> maintenance.

Interesting. However, the main problem with libvirt is that its 
pool/volume management fall apart when used on thin-pools. Basically, 
libvirt does not understand that a thinpool is a container for thin 
volumes (ie: 

Danti Gionatan
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Assyoma S.r.l. - www.assyoma.it
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