Il 2020-11-21 04:10 Sreyan Chakravarty ha scritto:
I mean what is the point of creating a snapshot if I can't change my original volume ? Is there some sort of resolution ?
External thin snapshot are useful to share a common, read-only base (ie: a "gold-master" image) with different writable thin lvm overlay volumes. They can not be merged into external origin; otherwise, a single merge operation would invalidate *all* other thin snapshot relying on the same origin.
Classical LVM snapshots are good for temporary, short-lived snapshots - basically taken for backup purpose only (and immediately removed after the backup completed). You should not use them for long-lived snapshots (otherwise you can see much lower performance and delayed boot).
If you want to have long-lived snapshot you should use LVM thin snapshots. For root volumes, you have two choices: - use a thin lvm volume for root, which is a supported use case (but it will probably require a system reinstallation); - continue using your classical LVM as a immutable base and use a thin lvm with external snapshot to store all new writes.
Regards. -- Danti Gionatan Supporto Tecnico Assyoma S.r.l. - www.assyoma.it email: g.danti@xxxxxxxxxx - info@xxxxxxxxxx GPG public key ID: FF5F32A8 _______________________________________________ linux-lvm mailing list linux-lvm@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
