From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Peter Eisentraut <peter_e(at)gmx(dot)net>, Bruce Momjian - CVS <momjian(at)hub(dot)org>, pgsql-committers(at)postgresql(dot)org |
Subject: | Re: pgsql/doc/TODO.detail (alpha default distinct flock fsync function limit null pg_shadow primary) |
Date: | 2000-07-05 04:39:05 |
Message-ID: | 200007050439.AAA20743@candle.pha.pa.us |
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Lists: | pgsql-committers pgsql-hackers |
> eisentrp(at)csis(dot)gvsu(dot)edu writes:
> > On Tue, 4 Jul 2000, Bruce Momjian - CVS wrote:
> >> Removed Files:
> >> alpha default distinct flock fsync function limit null
> >> pg_shadow primary
>
> > What are we going to do with the flock? Remove it? I asked about this
> > yesterday, I guess it's not useful anymore.
>
> It still is, because the $PGDATA pid file only guards against starting
> two postmasters in the same data directory. You still need some lock
> against starting two postmasters on the same port number. The TCP
> socket address can take care of itself, but if one or both postmasters
> is started without -i then there's got to be some interlock on the Unix
> socket file.
>
> I don't much like depending on flock for that, since it isn't available
> everywhere. The only portable answer is to build a pid-containing
> interlock file for each socket file, as discussed in the TODO item.
>
> It was premature of Bruce to delete the flock TODO file, since there is
> still a lot of undone stuff in there concerning both this issue and
> moving the Unix-socket file to a safer place than /tmp.
OK, I have re-added TODO.detail, and re-added the TODO item.
--
Bruce Momjian | http://www.op.net/~candle
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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