Re: Repacking many disconnected blobs

From: Keith Packard <keithp@keithp.com>
Date: Jun 14, 2006, 18:59 UTC
Message-ID: <1150311567.30681.28.camel@neko.keithp.com>
In-Reply-To: <Pine.LNX.4.64.0606141113130.5498@g5.osdl.org>

On Wed, 2006-06-14 at 11:18 -0700, Linus Torvalds wrote:

> You don't _need_ to shuffle. As mentioned, it will only affect the 
> location of the data in the pack-file, which in turn will mostly matter 
> as an IO pattern thing, not anything really fundamental.  If the pack-file 
> ends up caching well, the IO patterns obviously will never matter.

Ok, sounds like shuffling isn't necessary; the only benefit packing gains me is to reduce the size of each directory in the object store; the process I follow is to construct blobs for every revision, then just use the sha1 values to construct an index for each commit. I never actually look at the blobs myself, so IO access patterns aren't relevant.

Repacking after the import is completed should undo whatever horror show I've created in any case.

-- 
keith.packard@intel.com