It seems there is already a project on pgfoundry but there are no files:
http://pgfoundry.org/projects/clearxlogtail/
Should this be on pgfoundry or in the Postgres distribution. It seems
it might be tied enough to the WAL format to be in the Postgres
distribution.
---------------------------------------------------------------------------
Kevin Grittner wrote:
> >>> On Thu, Sep 6, 2007 at 7:31 PM, in message
> <46E055A7.EE98.0025.0@wicourts.gov>, "Kevin Grittner"
> <Kevin.Grittner@wicourts.gov> wrote:
> >>>> On Thu, Sep 6, 2007 at 7:03 PM, in message
> > <1189123422.9243.29.camel@dogma.ljc.laika.com>, Jeff Davis <pgsql@j-davis.com>
> > wrote:
> >>
> >> I think ... there's still room for a simple tool that can zero out
> >> the meaningless data in a partially-used WAL segment before compression.
> >> It seems reasonable to me, so long as you keep archive_timeout at
> >> something reasonably high.
> >>
> >> If nothing else, people that already have a collection of archived WAL
> >> segments would then be able to compact them.
> >
> > That would be a *very* useful tool for us, particularly if it could work
> > against our existing collection of old WAL files.
>
> Management here has decided that it would be such a useful tool for our
> organization that, if nobody else is working on it yet, it is something I
> should be working on this week. Obviously, I would much prefer to do it
> in a way which would be useful to the rest of the PostgreSQL community,
> so I'm looking for advice, direction, and suggestions before I get started.
>
> I was planning on a stand-alone executable which could be run against a
> list of files to update them in-place, or to handle as single file as a
> stream. The former would be useful for dealing with the accumulation of
> files we've already got, the latter would be used in our archive script,
> just ahead of gzip in the pipe.
>
> Any suggestions on an existing executable to use as a model for "best
> practices" are welcome, as are suggestions for the safest and most robust
> techniques for identifying the portion of the WAL file which should be set
> to zero.
>
> Finally, I assume that I should put this on pgfoundry?
>
> -Kevin
>
>
>
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-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://enterprisedb.com
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