| From: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
| Cc: | Charlie Wang <wangbaobing(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org, Qingqing Zhou <zhouqq(at)cs(dot)toronto(dot)edu> |
| Subject: | Re: [PATCHES] About the structure of WAL Files. |
| Date: | 2006-03-15 13:43:36 |
| Message-ID: | 1142430216.3859.69.camel@localhost.localdomain |
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| Thread: | |
| Lists: | pgsql-hackers pgsql-patches |
On Wed, 2006-03-15 at 09:12 -0400, Alvaro Herrera wrote:
> Charlie Wang wrote:
> > I want to write a function to expose the content of WAL Files as streams,
> > and then send to somewhere else, record by record.
>
> Re: the WAL records, most likely they are useless outside the server
> that generated them, because they refer to relations using Oids, and to
> specific page addresses which are probably not going to be exactly the
> same anywhere else (consider VACUUM commands running at different
> times).
Yet it should be pointed out that there is a commercial product that
says it uses this information to provide a replication system for
PostgreSQL, so presumably that problem can be solved...
Best Regards, Simon Riggs
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