From: Joshua Jensen <jjensen@workspacewhiz.com>
Date: Fri, 24 Sep 2010 19:30:30 GMT
Subject: Re: git-upload-pack bandwidth cap over SSH?
Message-ID: <4C9CFC56.3030501@workspacewhiz.com>
In-Reply-To: <4C9CB9E9.8010901@workspacewhiz.com>

  ----- Original Message -----
From: Joshua Jensen
Date: 9/24/2010 8:47 AM
>  Our Git repository central server is running on some kind of 
> enterprise VM software.  I can push repository changes through the 
> Gitolite-monitored SSH tunnel at 10+ megabytes per second.
>
> A 'git pull' operation (even a fresh clone of the packed repository) 
> always caps at 1.55 MiB/s, according to the "Receiving objects" line 
> in the status text.
>
> Thinking it might be a hardware issue (half duplex?), I installed 
> VirtualBox on my Windows 7 64-bit machine and then made an Ubuntu 
> Gitolite install.  Running on my local hardware, the push is roughly 
> 12 megabytes per second.  The 'git pull' downstream again caps at 1.55 
> MiB/s.
>
> Are there any configuration settings within Git that may limit the 
> git-upload-pack operation's speed?
>
> I realize this could be a MinGW issue via the msysGit client.
>
> Update: I just copied a large file via 'scp', and the downstream still 
> capped at 1.55-ish megabytes per second.  So it isn't Git.
Replying to my own message... I take that back.  I'm not sure what I was 
seeing, but I can consistently run scp and copy files at 6+ megabytes 
per second.

With that in mind, I'm back to looking at Git's pull performance over 
SSH.  It never exceeds 1.55 MiB/s.

Josh