| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
| Cc: | Peter Geoghegan <pg(at)heroku(dot)com>, Jeff Davis <pgsql(at)j-davis(dot)com>, Josh Kupershmidt <schmiddy(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: pg_filedump 9.3: checksums (and a few other fixes) |
| Date: | 2013-06-27 13:51:07 |
| Message-ID: | 19912.1372341067@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> On 2013-06-26 21:18:49 -0700, Peter Geoghegan wrote:
>> Heroku are interested in online verification of basebackups (i.e.
>> using checksums to verify the integrity of heap files as they are
>> backed up, with a view to relying less and less on logical backups).
> Why not do this from a function/background worker in the backend where
> you can go via the buffer manager to avoid torn pages et al. If you use
> a buffer strategy the cache poisoning et al should be controlleable.
That would require having a functioning postmaster environment, which
seems like it would make such a tool much less flexible.
regards, tom lane
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