Re: WAL and pg_dump

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От Mike C
Тема Re: WAL and pg_dump
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Msg-id bd0eabd0512221309r5bcb41e2s69e9a7fdc8cb9edb@mail.gmail.com
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Ответ на Re: WAL and pg_dump  (Simon Riggs <simon@2ndquadrant.com>)
Ответы Re: WAL and pg_dump  (Simon Riggs <simon@2ndquadrant.com>)
Re: WAL and pg_dump  (Tom Lane <tgl@sss.pgh.pa.us>)
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On 12/22/05, Simon Riggs <simon@2ndquadrant.com> wrote:
On Tue, 2005-12-13 at 11:18 +1300, Mike C wrote:
> All the documentation I've seen for PITR points to having to do a file
> system copy of sorts.

Yes. There's no other way, but why would you want another way?

Mainly because a pg_dump backup takes up a lot less disk space than a filesystem copy (in my case, approx 3.5GB backup from a 25GB db). 

> Is it possible to have a weekly pg_dump and restore the database up to
> the last archived WAL file if the db server fails?

No.

pg_dump only copies the data, not the current state of the database.

I guess if pg_dump was modified to record the last complete transaction id (in archive format maybe) then the WAL files could be used?
 
Thanks for the response,

Mike C.

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