Re: Trimming gdk-pixbuf repository

[Alberto Ruiz <aruiz gnome org>]

2011/5/24 Yasushi SHOJI <yashi atmark-techno com>:
> At Sat, 21 May 2011 03:37:38 +0200,
> Olav Vitters wrote:
>>
>> On Thu, Mar 17, 2011 at 09:06:32PM +0000, Alberto Ruiz wrote:
>> > I am looking for comments from git experts on any of the operations
>> > I'm doing and how feasible would be to rewrite the git.gnome.org
>> > repository. The resulting repository can be found in my github
>> > site[0].
>>
>> Any git experts who can look at this again?
>>
>> https://mail.gnome.org/archives/gtk-devel-list/2011-March/msg00066.html
>
> I'm not a git expert per se, but I would be against the idea if I was
> asked for the following reasons:
>
>  - the trim changes the SHA1 ID
>   check the commit with PIXBUF_0_0 tag; the cuurent gdk-pixbuf repo
>   on git.gnome.org has f0723b00 but the trimed one has 534df8c.  this
>   is due to git's _feature_.

That shouldn't be a big deal given the bandwidth savings.

>  - we usually clone a few times
>   most of us do not re-clone every time we hack on it.  rather, we
>   keep the cloned repo handy and reuse all the time.

_You_ usually do not re-clone, I have several test machines, and those
get wiped once in a while, and every time I have to setup a new
environment is a PITA.

In any case, what worries me the most is bandwidth usage (though I
don't have any numbers), it seems weird to me that we are moving away
from tar.gz/bz2 to save bandwidth and still we waste so much bandwidth
cloning gtk3/2/gdk-pixbuf

>  - there is another way to reduce the transfer size (if you have gtk+ repo)
>   you can tell git to reference gtk+ git repo when you clone gdk-pixbuf
>
>        $ /usr/bin/time git clone --reference gtk+ git://git.gnome.org/gdk-pixbuf
>        Cloning into gdk-pixbuf...
>        remote: Counting objects: 30651, done.
>        remote: Compressing objects: 100% (7683/7683), done.
>        remote: Total 30184 (delta 25544), reused 26364 (delta 22362)
>        Receiving objects: 100% (30184/30184), 36.57 MiB | 375 KiB/s, done.
>        Resolving deltas: 100% (25544/25544), completed with 417 local objects.
>        18.33user 1.47system 2:31.32elapsed 13%CPU (0avgtext+0avgdata 430768maxresident)k
>        541864inputs+210072outputs (102major+51069minor)pagefaults 0swaps

I'm not sure there's a sensible way to do this in jhbuild

>   it is bigger than trimed one (29.40 MiB) but 6 MiB is negligible
>   IMO.  here is the log of full clone via my slow wireless
>   connection, just in case.

>
>        $ /usr/bin/time git clone git://git.gnome.org/gdk-pixbuf
>        Cloning into gdk-pixbuf...
>        remote: Counting objects: 229825, done.
>        remote: Compressing objects: 100% (33082/33082), done.
>        remote: Total 229825 (delta 197326), reused 228509 (delta 196355)
>        Receiving objects: 100% (229825/229825), 133.96 MiB | 413 KiB/s, done.
>        Resolving deltas: 100% (197326/197326), done.
>        55.00user 3.84system 5:41.92elapsed 17%CPU (0avgtext+0avgdata 110496maxresident)k
>        12872inputs+575600outputs (10major+15953minor)pagefaults 0swaps
>
> just my two cents.
> --
>          yashi
>



-- 
Un saludo,
Alberto Ruiz