<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><p style="margin: 0;"><br></p><div style="margin: 0;">Thank you, Sean.</div><div style="margin: 0;"><br></div><div style="margin: 0;"><span style="font-family: arial; white-space: pre-wrap;">At 2021-06-15 18:54:00, "Sean McGinnis" <sean.mcginnis@gmx.com> wrote:</span></div><pre>>
>This is partly due to the rollback abilities of each type of storage. Some
>types can't revert to several snapshots back without losing the more recent
<div>>snapshots. This means that Cinder would still think there are snapshots</div><div><br></div><div>BTW, do we have counted which drivers can't / can revert to several snapshots</div><div>back without losing the more recent snapshots?</div><div><br></div>>available, but those snapshots would no longer be present on the storage
<div>>device.</div>>
>This is considered a data loss condition, so we need to protect against that
>from happening. It's been discussed several times at Design Summits and PTGs,
>and at least so far there has not been a good way to handle it.
>
>The best recommendation we can give is for anyone that needs to go back several
>snapshots, you will need to revert one snapshot at a time to get back to where
>you need to be.
>
>But it is also worth pointing out that snapshots, and the ability to revert to
>snapshots, is not necessarily the best mechanism for data protection. If you
>need to have the ability to restore a volume back to its earlier state, using
>the backup/restore APIs are likely the more appropriate way to go.
>
>Sean
</pre></div></div><br><br><span title="neteasefooter"><p> </p></span>