Re: [libvirt] Repack git repo?

On 08/03/2017 09:57 AM, Daniel P. Berrange wrote: > On Thu, Aug 03, 2017 at 09:16:13AM +0200, Michal Privoznik wrote: >> So I was checking out the repo the other day and it took ages. So it got >> me thinking what might be the problem. Looks like a part of it is that >> our pack is split among ~250 files. Therefore when somebody does >> checkout git needs to repack it into a single pack every time. And this >> may take ages on such slow processor as Atom is. However, reading some >> docs on this it looks like 'git gc --aggressive' is not advised rather >> than 'git repack'. > > I created a 'tmp' repo and ran 'repack' on it, but afaict, there's no > appreciable difference. In fact, there is. I just finished running 'git repack -a -d' over the 'tmp' repo and here are the results: $ time git clone git://libvirt.org/libvirt.git libvirt_temp.git Cloning into 'libvirt_temp.git'... remote: Counting objects: 236385, done. remote: Compressing objects: 100% (38422/38422), done. remote: Total 236385 (delta 200296), reused 232761 (delta 196975) Receiving objects: 100% (236385/236385), 297.08 MiB | 5.55 MiB/s, done. Resolving deltas: 100% (200296/200296), done. real 2m40.089s user 1m2.831s sys 0m2.970s $ time git clone git://libvirt.org/tmp tmp.git Cloning into 'tmp.git'... remote: Counting objects: 236365, done. remote: Compressing objects: 100% (35400/35400), done. remote: Total 236365 (delta 200277), reused 236065 (delta 199977) Receiving objects: 100% (236365/236365), 297.19 MiB | 6.17 MiB/s, done. Resolving deltas: 100% (200277/200277), done. real 1m16.209s user 1m7.782s sys 0m2.940s In the first case, the network transmission took ~54s, so prep work on server took ~1m45s. In the second case, network transmission took 48s, so prep work took just ~28s. Therefore I think it makes sense to run the command. If nobody objects I can do that later today.