Re: parallel pg_restore - WIP patch

Russell Smith wrote:
> I'm sorry, I meant processes there. I'm aware there are no threads.
> But my feeling was that when you forked with open files you got all of
> the open file properties, including positions, and as you dupped the
> descriptor, you share all that it's pointing to with every other copy of
> the descriptor. My brief research on that shows that in 2005 there was
> a kernel mailing list discussion on this issue.
> http://mail.nl.linux.org/kernelnewbies/2005-09/msg00479.html was quite
> informative for me. I again could be wrong but worth a read. If it is
> true, then the file needs to be reopened by each child, it can't use the
> duplicated descriptor. I haven't had a change to implementation test is
> as it's late here. But I'd take a stab that it will solve the
> compression library problems.
>
> I hope this helps, not hinders
>
>
>

I'm sure that's the problem. Should be fairly easily fixable, I believe.

Thanks for the info.

cheers

andrew