| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Steve Frampton <frampton(at)LinuxNinja(dot)com> |
| Cc: | pgsql-admin(at)postgresql(dot)org |
| Subject: | Re: [REPOST] Remote database questions (NFS shared access, RServ) |
| Date: | 2001-10-09 13:32:26 |
| Message-ID: | 23082.1002634346@sss.pgh.pa.us |
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| Lists: | pgsql-admin |
Steve Frampton <frampton(at)LinuxNinja(dot)com> writes:
> even better solution seems to be to run my production (or backup mirror)
> from a NetApp over Gb NFS so there's no issues with replication. Is it
> possible, safe, and advisable to share a PostgreSQL database file via NFS,
> as long as non-masters are only accessing it R/O?
No. (a) there is no such thing as R/O access in Postgres; (b) the
non-masters would have no guarantee of seeing a consistent view,
due to buffering inside the master.
I don't even recommend mounting a database over NFS, let alone trying
to share it. Too much risk of database corruption after a system crash,
because NFS provides only weak guarantees about write synchronization.
See the mailing list archives for past discussion about NFS risks.
regards, tom lane
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