Thanks. That seems to help.
Just for context, we are using a copy-on-write/cloning solution to give developers a prebuilt workspace with all the platforms fully built, as well as sources all cloned,
So they are ready for incremental development.
We create a ext4 diskimage, with a git clone workspace(50G) and 900G of fully built trees, then freeze that diskimage.
Developers have a way to clone that diskimage(into a copy-on-write) copy of the diskimage(in 30 seconds) that they can mount and use for incremental build development.
I did the following.
Mounted the existing filesystem
git update-index --untracked-cache
git update-index --refresh
Not sure what you meant by " working tree state in the diskimage"
I then detached the diskimage, dropped all the caches.
Remounted the diskimage.
git status - The very first git status after dropping the cache now returns in in 1.54 seconds, which seems very much acceptable.
I obviously need to do more read up on what/how git caches.
Can you point to any documentation on what sort of information GIT caches, and how to understand debug that?
I would like to understand what the above git update-index commands actually do, that is making this faster.
Thanks,
Sarvi
Occam’s Razor Rules
On 8/22/19, 11:13 AM, "Junio C Hamano" <gitster@xxxxxxxxx> wrote:
"Saravanan Shanmugham (sarvi)" <sarvi@xxxxxxxxx> writes:
> I suspect warming the filesystem caching is in play.
> But so is the fact that walk every tree to find untracked files as well.
Enable the untracked cache and "update-index --refresh", before
freezing the repository + working tree state in the diskimage?
