Re: GNU Toolchain Infrastructure at sourceware

["Frank Ch. Eigler" <fche@redhat.com>]

Hi -


> builder.sourceware.org has been running for a couple of months
> now. The buildbot process seems to have a low load on the machine. Low
> single digit %CPU. The state database has grown to ~800MB, the
> gitpoller-work dir is ~4GB (that is mainly gcc ~2G, libabigail ~750M
> and binutils-gdb ~600M, others are < 200M).

I suspect those git work trees could be made into shallow clones, or
use git-alternates or somesuch to minimize unnecessary .git/objects
duplication right there on the same machine.


> I am slightly worried about the long time these uploads take. For
> example the upload of results from the elfutils builders takes a
> significant amount of time (almost half) of the build (4 to 5 out of
> 10 to 12 minutes). Especially on the slower workers this can cause
> them to get behind on the build queue.

Yeah, this appears to be a buildbot infrastructure limitation.
Something is very inefficient about the way it evaluates file upload
directives.  If it turns into a bigger problem, can try to revisit.


> The bunsendb.git is currently ~400MB and contains ~2000 results. It
> seems it compresses fairly well and could maybe use a periodic
> repacking (making a local clone reduces the size to ~260MB).

No big deal, auto repack will do most of the work fine.

Added to that, there is the bunsenql.sqlite database, which is at the
moment around 2GB.  It will ebb and flow with the bunsendb.git
contents.


I think all of the above storage levels are sustainable for at least
several months at this rate, after which point we could start aging
out old data.  (Plus we have an extra TB of space for /sourceware[12]
that I plan to bring online shortly.)


- FChE