| From: | Paul Förster <paul(dot)foerster(at)gmail(dot)com> |
|---|---|
| To: | Magnus Hagander <magnus(at)hagander(dot)net> |
| Cc: | "Wolff, Ken L" <ken(dot)l(dot)wolff(at)lmco(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, pgsql-general <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: EXTERNAL: Re: Netapp SnapCenter |
| Date: | 2020-06-26 12:36:45 |
| Message-ID: | 792BE4D0-A57F-4E5F-997E-BCE228D783F6@gmail.com |
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| Lists: | pgsql-general |
Hi Magnus,
> On 26. Jun, 2020, at 12:29, Magnus Hagander <magnus(at)hagander(dot)net> wrote:
> I believe NetApp does atomic snapshots across multiple volumes, if you have them in the same consistency group. (If you don't then you're definitely in for a world of pain if you ever have to restore)
>
> Snapshotting multiple volumes in a consistency group will set up a write fence across them, then snapshot, and AIUI guarantees correct write ordering.
That's how I understood it too. But it will be difficult in our complex storage world to get the storage guys to create a consistency group.
Also, what I'm looking for is a plugin that allows to, how Netapp call it, "quiece" the PostgreSQL cluster, i.e. does start/stop backup.
I don't really trust the community plugin as it is so old and I'm not sure it gets any more development attention. For example, what about the API change (exclusive vs. non-exclusive)? Does it use the new API?
Cheers,
Paul
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