Re: Add LZ4 compression in pg_dump

On Mon, Dec 19, 2022 at 05:03:21PM +0000, gkokolatos@pm.me wrote:
> > > 001 still doesn't compile on freebsd, and 002 doesn't compile on
> > > windows. Have you checked test results from cirrusci on your private
> > > github account ?
> 
> There are still known gaps in 0002 and 0003, for example documentation,
> and I have not been focusing too much on those. You are right, it is helpful
> and kind to try to reduce the noise. The attached should have hopefully
> tackled the ci errors.

Yep.  Are you using cirrusci under your github account ?

> > FYI, I have re-added an entry to the CF app to get some automated
> > coverage:
> > https://commitfest.postgresql.org/41/3571/
> 
> Much obliged. Should I change the state to "ready for review" when post a
> new version or should I leave that to the senior personnel?   

It's better to update it to reflect what you think its current status
is.  If you think it's ready for review.

> > > 002 breaks "pg_dump -Fc -Z2" because (I think) AllocateCompressor()
> > > doesn't store the passed-in compression_spec.
> 
> I am afraid I have not been able to reproduce this error. I tried both
> debian and freebsd after I addressed the compilation warnings. Which
> error did you get? Is it still present in the attached?

It's not that there's an error - it's that compression isn't working.

$ ./tmp_install/usr/local/pgsql/bin/pg_dump -h /tmp -Z1 -Fp regression |wc -c
659956
$ ./tmp_install/usr/local/pgsql/bin/pg_dump -h /tmp -Z2 -Fp regression |wc -c
637192

$ ./tmp_install/usr/local/pgsql/bin/pg_dump -h /tmp -Z1 -Fc regression |wc -c
1954890
$ ./tmp_install/usr/local/pgsql/bin/pg_dump -h /tmp -Z2 -Fc regression |wc -c
1954890

-- 
Justin