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Re: [RFC/PATCH 0/8] Add configuration options for split-index

From
Duy Nguyen <pclouds@gmail.com>
Date
Jul 12, 2016, 16:01 UTC
Message-ID
<CACsJy8ApNJ+EBOVNC0GoPUaO898QRqHUZ2yQ39Qg5uGq4sHHGg@mail.gmail.com>
In-Reply-To
<20160711172254.13439-1-chriscool@tuxfamily.org>

On Mon, Jul 11, 2016 at 7:22 PM, Christian Couder <christian.couder@gmail.com> wrote:

Show 17 quoted lines
> Future work
> ~~~~~~~~~~~
>
> One thing that is probably missing is a mechanism to avoid having too
> many changes accumulating in the (split) index while in split index
> mode. The git-update-index documentation says:
>
>         If split-index mode is already enabled and `--split-index` is
>         given again, all changes in $GIT_DIR/index are pushed back to
>         the shared index file.
>
> but it is probably better to not expect the user to think about it and
> to have a mechanism that pushes back all changes to the shared index
> file automatically when some threshold is reached. The threshold could
> be for example when $GIT_DIR/index size is larger than 25% of the
> shared index size. Opinions, test results or test ideas are welcome on
> this.

Oh yes I would like something like this. I stuck to the basics because as you see you need to define some criteria to re-split again, but without experimenting on real repos, I could just have gone the wrong way. Index file size or the percentage of entries in linked/shared indexes are two good candidates. You can also just re-split on commands that likely lead to increasing linked index size a lot (maybe git-reset), or run long enough that some extra processing won't get noticed. For example git-gc should definitely re-split if this feature is on, but I can't say if it's often enough.

-- 
Duy
Previous: Christian CouderNext: Christian Couder
Message 16 of 19 in “Add configuration options for split-index”
  1. 0/8 Add configuration options for split-indexChristian Couder, Jul 11, 2016
  2. 2/8 split-index: add {add,remove}_split_index() functionsChristian Couder, Jul 11, 2016
  3. 3/8 read-cache: add and then use tweak_split_index()Christian Couder, Jul 11, 2016
  4. 5/8 Documentation/config: add information for core.splitIndexChristian Couder, Jul 11, 2016
  5. 6/8 Documentation/git-update-index: talk about core.splitIndex config varChristian Couder, Jul 11, 2016
  6. 7/8 t1700: add tests for core.splitIndexChristian Couder, Jul 11, 2016
  7. 4/8 update-index: warn in case of split-index incoherencyChristian Couder, Jul 11, 2016
  8. 8/8 read-cache: unlink old sharedindex filesChristian Couder, Jul 11, 2016
  9. Duy NguyenJul 11, 2016
  10. Christian CouderJul 12, 2016
  11. Duy NguyenJul 12, 2016
  12. Christian CouderJul 12, 2016
  13. Duy NguyenJul 13, 2016
  14. Christian CouderJul 13, 2016
  15. 1/8 config: add git_config_get_split_index()Christian Couder, Jul 11, 2016
  16. Duy NguyenJul 12, 2016
  17. Christian CouderJul 23, 2016
  18. Duy NguyenJul 25, 2016
  19. Christian CouderJul 25, 2016

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