On Wed, 2005-04-20 at 07:59 -0700, Linus Torvalds wrote:
> external-parent
> comment for this parent
>
> and the nice thing about that is that now that information allows you to
> add external parents at any point.
>
> Why do it like this? First off, I think that the "
On Wed, Apr 20, 2005 at 05:57:34PM +0200, Martin Uecker wrote:
> On Wed, Apr 20, 2005 at 11:28:20AM -0400, C. Scott Ananian wrote:
>
> > Yes, I guess this is the detail I was going to abandon. =)
> >
> > I viewed the fact that the top-level hash was dependent on the exact chunk
> > makeup a 'mis
On Wed, Apr 20, 2005 at 11:28:20AM -0400, C. Scott Ananian wrote:
Hi,
> A merkle-tree (which I think you initially pointed me at) makes the hash
> of the internal nodes be a hash of the chunk's hashes; ie not a straight
> content hash. This is roughly what my current implementation does, but
On Wed, 20 Apr 2005, Martin Uecker wrote:
You can (and my code demonstrates/will demonstrate) still use a whole-file
hash to use chunking. With content prefixes, this takes O(N ln M) time
(where N is the file size and M is the number of chunks) to compute all
hashes; if subtrees can share the same
On Wed, Apr 20, 2005 at 10:30:15AM -0400, C. Scott Ananian wrote:
Hi,
your code looks pretty cool. thank you!
> On Wed, 20 Apr 2005, Martin Uecker wrote:
>
> >The other thing I don't like is the use of a sha1
> >for a complete file. Switching to some kind of hash
> >tree would allow to introduc
On Thu, 21 Apr 2005, David Woodhouse wrote:
>
> The reason for doing this is that without it, we can't ever have a full
> history actually connected to the current trees. There'd always be a
> break at 2.6.12-rc2, at which point you'd have to switch to an entirely
> different git repository.
Qu
On Wed, 20 Apr 2005, Linus Torvalds wrote:
- _keep_ the same compression format, but notice that we already have an
object by looking at the uncompressed one.
With a chunked file, you can also skip writing certain *subtrees* of the
file as soon as you notice it's already present on disk. I can
On Wed, 20 Apr 2005, Martin Uecker wrote:
The other thing I don't like is the use of a sha1
for a complete file. Switching to some kind of hash
tree would allow to introduce chunks later. This has
two advantages:
You can (and my code demonstrates/will demonstrate) still use a whole-file
hash to us
On Wed, 20 Apr 2005, Jon Seymour wrote:
>
> Am I correct to understand that with this change, all the objects in the
> database are still being compressed (so no net performance benefit), but by
> doing the SHA1 calculations before compression you are keeping open the
> possibility that at so
On Wed, 2005-04-20 at 02:08 -0700, Linus Torvalds wrote:
> I converted my git archives (kernel and git itself) to do the SHA1
> hash _before_ the compression phase.
I'm happy to see that -- because I'm going to be asking you to make
another change which will also require a simple repository conver
> The main point is not about trying different compression
> techniques but that you don't need to compress at all just
> to calculate the hash of some data. (to know if it is
> unchanged for example)
>
Ah, ok, I didn't understand that there were extra compresses being
performed for that reason.
On 4/20/05, Martin Uecker <[EMAIL PROTECTED]> wrote:
> The storage method of the database of a collection of
> files in the underlying file system. Because of the
> random nature of the hashes this leads to a horrible
> amount of seeking for all operations which walk the
> logical structure of som
On Wed, Apr 20, 2005 at 10:11:10PM +1000, Jon Seymour wrote:
> On 4/20/05, Linus Torvalds <[EMAIL PROTECTED]> wrote:
> >
> >
> > I converted my git archives (kernel and git itself) to do the SHA1 hash
> > _before_ the compression phase.
> >
>
> Linus,
>
> Am I correct to understand that with
On 4/20/05, Linus Torvalds <[EMAIL PROTECTED]> wrote:
>
>
> I converted my git archives (kernel and git itself) to do the SHA1 hash
> _before_ the compression phase.
>
Linus,
Am I correct to understand that with this change, all the objects in
the database are still being compressed (so no n
* Linus Torvalds <[EMAIL PROTECTED]> wrote:
> So to convert your old git setup to a new git setup, do the following:
> [...]
did this for two repositories (git and kernel-git), it works as
advertised.
Ingo
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