Alvaro Herrera wrote:
> Bruce Momjian wrote:
> > Alvaro Herrera wrote:
>
> > > There are so many caveats on pg_migrator (and things that need to be
> > > done after the migration is complete) that one starts to wonder if
> > > people is not better off just using parallel pg_restore. From Stefan's
> > > reported timings I'm not sure that pg_migrator is that much of a benefit
> > > in the first place ... unless copy mode can be made much faster. (On
> > > link mode it is so much faster that it's worth it, but then you don't
> > > have an escape hatch).
> >
> > That is accurate. I doubt copy mode speed can be improved.
>
> Why not? Right now it's single-threaded. Would it be faster if it ran
> several copies in parallel?
Sure, but that assumes you have parallel I/O channels; I assume right
now it is I/O limited.
-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +
