> > So, I think we are safe if we can either keep that file descriptor open
> > until commit, or re-open it and fsync it on commit. That assume a
> > re-open is hitting the same file. My opinion is that we should just
> > fsync it on close and not worry about a reopen.
> >
>
> I asked about this question 4 months ago but got no answer.
> Obviouly this needs not only md/fd stuff changes but also bufmgr
> changes. Keeping dirtied list of segments of each backend seems
> to work. But I'm afraid of other oversights.
I don't think so. We can just mark file descriptors as needing fsync().
By doing that, we can spin through the buffer cache for each need_fsync
file desciptor, perform any writes needed, and fsync the descriptor.
Seems like little redesign needed, except for adding the need_fsync
flag. Should be no more than about 20 lines.
-- Bruce Momjian | http://www.op.net/~candle pgman@candle.pha.pa.us | (610)
853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill,
Pennsylvania19026
