Re: TODO item inquiry/claim

Brent Verner wrote:
> On 18 Nov 2001 at 18:17 (+0100), Peter Eisentraut wrote:
> | Brent Verner writes:
> |
> | > * Add table name mapping for numeric file names
> |
> | > It's been tested with 7.1 and 7.2bN and is basically a few c functions
> | > that allow (approximate) reports of disk usage (in Kb) per database,
> | > and per relation (only on the current database, for now).
> |
> | I've written on like that a while ago:
> |
> | http://webmail.postgresql.org/~petere/dbsize.html
> |
> | The tarball can be rolled into contrib -- now that I think of it I don't
> | know why I never did that.
>
> Can you put your code in contrib? I've seen atleast a few other
> users wanting to measure disk use.

Done.

> | Never imagined this would have anything to do with that TODO item, though.
> | I figured oid2name accomplished that.
>
> Yeah, but it address one inconvenience caused by the oid-named files.
> Even after reading through the thread[1], I'm not sure what the desired
> solution to the problem is. There seem to be two reasons to know
> the filename->(db|rel) mapping.
>
> 1) resource usage [solved]

Yes.

> 2) data recovery from db failure.
>
> Are there any other reasons an admin needs to know the actual
> filenames the system is using? Please reply if you have any.
>
> I really have no idea what all would be involved in recovering a
> database (or a single relation, if possible), so I would appreciate
> suggestions on what needs to be done to address this issue WRT the
> filename->(db|rel) mappings. There was not a concensus on what the
> proper solution would look like; some suggested maintaining symlinks,
> other suggested a separate file of mappings. If someone would tell
> me what a reliable solution would be, I'll work at implementing it
> for inclusion in one of the 7.2.X maintenance releases.

I wish I knew the answer. :-)

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