At 10:49 3/07/00 +0200, Zeugswetter Andreas SB wrote:
>> It just occurred to me that I may be missing something...do you mean you
>> would prefer to avoid the 'COPY' commands as the backup technique? If so,
>I
>> think that's best left to somebody else (or me, but not now, and probably
>> not until the WAL is implemented).
>
>Yes, that was what I was thinking. I don't see a conflicting area with WAL.
>I would see this as an extension to libpq and how it handles binary cursors
>across different platforms.
OK: I know nothing about this, but I'd be interested to learn.
The reason I mentioned the WAL is that I think that any more advanced
backup strategy needs to be integrated into the journaling system (ie. the
WAL). Ideally, we should be able to snapshot a consistent view of raw data
and apply a copy of the journal to this snapshot. In other systems I use
(Dec/Rdb), this is done via a page-based backup (I think) and an
after-image journal (both of which I *think* are at a lower level than
tables & rows - more like pages & slots.
As a result, I had planned to wait and see what the WAL did for backup
strategies...
But, in the mean time, if you think a binary pg_dump is possible (an
relatively easy), I'd be interested to try to integrate it...
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