Re: packs and trees

From: Linus Torvalds <torvalds@osdl.org>
Date: Jun 21, 2006, 03:54 UTC
Message-ID: <Pine.LNX.4.64.0606202046290.5498@g5.osdl.org>
In-Reply-To: <46a038f90606201241x3dec242dicde245a24c3ab9ab@mail.gmail.com>

On Wed, 21 Jun 2006, Martin Langhoff wrote:

Show 5 quoted lines

> 
> If you are asking about the ext3 performance problems, I think Linus
> discussed that a while ago, why unpacked repos are slow (in addition
> to huge), and there were some suggestions of using hashed directory
> indexes.

Yes. I think most distros still default to nonhashed directories, but for any large-directory case you really want to turn on hashing.

I forget the exact details, it's somethng like

	tune2fs -O dir_index

or something to turn it on (if I remember correctly, that will only affect any directories then created after that, but you can effect that by just doing a "git repack -a -d" which will remove all old object directories, and now subsequent directories will be done with indexing on).

Personally, I just ended up using packs extensively, so I think I'm still running without indexing on all my machines ;)

		Linus