[linux-lvm] Unusually long boot times with LVM Snapshots

Sreyan Chakravarty sreyan32 at gmail.com
Sat Nov 21 08:21:42 UTC 2020

On Fri, Nov 20, 2020 at 4:45 PM Bryn M. Reeves <bmr at redhat.com> wrote:

> What type of snapshot are you using? LVM2 allows either "classic" CoW
> snaps,
> or the newer thin provisioned snapshots using the dm-thinp target.
> Classic snapshots are known to have very poor IO performance when multiple
> snapshots of the same volume exist simultaneously (especially for write-
> heavy workloads).
> Thin provisioned snapshots are not normally activated at boot time unless
> they are explicitly requested (via dracut's rd.lvm.lv options) since they
> have the skip activation flag set by default.

I tried thin snapshots, but what use are they if I can't use my system all

Once my root logical volume was marked read only I could not revert it back
to writable, after the snapshot was created.

Sreyan Chakravarty
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