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* [PATCH v1 0/8] Many promisor remotes
@ 2018-12-11  5:27 Christian Couder
  2018-12-11  5:27 ` [PATCH v1 1/8] fetch-object: make functions return an error code Christian Couder
                   ` (7 more replies)
  0 siblings, 8 replies; 10+ messages in thread
From: Christian Couder @ 2018-12-11  5:27 UTC (permalink / raw)
  To: git
  Cc: Junio C Hamano, Jeff King, Ben Peart, Jonathan Tan,
	Jonathan Nieder, Stefan Beller, Nguyen Thai Ngoc Duy, Mike Hommey,
	Lars Schneider, Eric Wong, Christian Couder, Jeff Hostetler,
	Eric Sunshine, Beat Bolli

This path series is a follow up from the "remote odb" patch series
that I sent earlier this year, which were a follow up from previous
series. See the links section for more information.

The goal of this patch series is to make it possible to have and to
fetch missing objects from multiple remotes instead of only one.

For now the fetch order is the order of the remotes in the config.

I selected the name "Promisor remote" over "Partial clone remote"
because it is shorter and because it is not only about cloning.

The existing extensions.partialclone is respected, but it is not
written in the config when a partial clone or fetch is made. Instead
remote.<name>.promisor is set to "true". This may create a
compatibility issue, but it makes it possible to start using many
promisor remotes by just cloning and fetching from different remotes
with partial clone filters. The compatibility issue could be resolved
in a future iteration by just setting extensions.partialclone instead
of remote.<name>.promisor the first time a promisor remote is used.

In general I have tried to change as few things as possible.

Yeah, this is missing documentation for now.

High level overview of this patch series
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  - Patch 1/8:

This makes functions in fetch-object.c return an error code, which is
necessary to later tell that they failed and try another promisor
remote when there is more than one. This could also just be seen as a
fix to these functions.

  - Patch 2/8:

This introduces the minimum infrastructure for promisor remotes.

  - Patch 3/8, 4/8 and 5/8:

This add a few missing bits in the promisor remote infrastructure that
will be needed in the following patches.

  - Patch 6/8:

This replaces the previous interface to use only one promisor remote
defined in extensions.partialclone by the new interface created by the
previous patches.

  - Patch 7/8:

This replaces the way a partial clone filter was handled by a new way
based on the previous patches that support more than one partial clone
filter.

  - Patch 8/8:

This adds a test case that shows that now more than one promisor
remote can be used.

Links
~~~~~

This new patch series is a follow up from the discussions related to
the remote odb V4 patch series:

https://public-inbox.org/git/20180802061505.2983-1-chriscool@tuxfamily.org/

Especially in:

https://public-inbox.org/git/CAP8UFD3nrhjANwNDqTwx5ZtnZNcnbAFqUN=u=LrvzuH4+3wQQA@mail.gmail.com/

I said that I would like to work on things in the following order:

  1) Teaching partial clone to attempt to fetch missing objects from
multiple remotes instead of only one using the order in the config.

  2) Simplifying the protocol for fetching missing objects so that it
can be satisfied by a lighter weight object storage system than a full
Git server.

  3) Making it possible to explicitly define an order in which the
remotes are accessed.

  4) Making the criteria for what objects can be missing more
aggressive, so that I can "git add" a large file and work with it
using Git without even having a second copy of that object in my local
object store.

And this patch series is about the 1).

This patch series on GitHub:

https://github.com/chriscool/git/commits/many-promisor-remotes

The previous remote odb patch series on GitHub:

V5: https://github.com/chriscool/git/commits/remote-odb
V4: https://github.com/chriscool/git/commits/remote-odb5
V3: https://github.com/chriscool/git/commits/remote-odb3
V2: https://github.com/chriscool/git/commits/remote-odb2
V1: https://github.com/chriscool/git/commits/remote-odb1

Discussions related to previous versions of the odb patch series:

V4: https://public-inbox.org/git/20180802061505.2983-1-chriscool@tuxfamily.org/
V3: https://public-inbox.org/git/20180713174959.16748-1-chriscool@tuxfamily.org/
V2: https://public-inbox.org/git/20180630083542.20347-1-chriscool@tuxfamily.org/
V1: https://public-inbox.org/git/20180623121846.19750-1-chriscool@tuxfamily.org/



Christian Couder (8):
  fetch-object: make functions return an error code
  Add initial support for many promisor remotes
  promisor-remote: implement promisors_get_direct()
  promisor-remote: add promisor_remote_reinit()
  promisor-remote: use repository_format_partial_clone
  Use promisors_get_direct() and has_promisor_remote()
  promisor-remote: parse remote.*.partialclonefilter
  t0410: test fetching from many promisor remotes

 Makefile                      |   1 +
 builtin/cat-file.c            |   5 +-
 builtin/fetch.c               |  13 +--
 builtin/gc.c                  |   3 +-
 builtin/repack.c              |   3 +-
 cache-tree.c                  |   3 +-
 connected.c                   |   3 +-
 fetch-object.c                |  13 +--
 fetch-object.h                |   4 +-
 list-objects-filter-options.c |  51 ++++++------
 list-objects-filter-options.h |   3 +-
 packfile.c                    |   3 +-
 promisor-remote.c             | 147 ++++++++++++++++++++++++++++++++++
 promisor-remote.h             |  22 +++++
 sha1-file.c                   |  14 ++--
 t/t0410-partial-clone.sh      |  26 +++++-
 t/t5601-clone.sh              |   3 +-
 t/t5616-partial-clone.sh      |   4 +-
 unpack-trees.c                |   6 +-
 19 files changed, 269 insertions(+), 58 deletions(-)
 create mode 100644 promisor-remote.c
 create mode 100644 promisor-remote.h

-- 
2.20.0.rc2.14.g1379de12fa.dirty


^ permalink raw reply	[flat|nested] 10+ messages in thread
* [PATCH v1 0/8] Introducing odb remote
@ 2018-05-13 10:32 Christian Couder
  2018-05-13 10:32 ` [PATCH v1 8/8] t0410: test fetching from many promisor remotes Christian Couder
  0 siblings, 1 reply; 10+ messages in thread
From: Christian Couder @ 2018-05-13 10:32 UTC (permalink / raw)
  To: git
  Cc: Junio C Hamano, Jeff King, Ben Peart, Jonathan Tan,
	Nguyen Thai Ngoc Duy, Mike Hommey, Lars Schneider, Eric Wong,
	Christian Couder, Jeff Hostetler

This is a follow up from the patch series called "Promisor remotes and
external ODB support" that I sent earlier this year.

Following discussions of these patch series, where Junio said "a
minimum s/ext/remote/ would clarify what it is", I decided to rename
"external odb" to "odb remote". I am still open to another name, but I
think that "odb remote" works well with "odb helper" that was already
used in the series and is as good or perhaps better than "remote odb",
as a "remote odb" I think would be easier to confuse with a regular
"remote".

Another obvious difference with the previous series is that this
series is only about integrating with the promisor/narrow clone work
and showing that it makes it possible to use more than one promisor
remote. Everything that is not necessary for that integration has been
removed for now (though you can still find it in one of my branches on
GitHub if you want).

This makes this patch series much shorter than the previous ones and
already useful. So hopefully this will make it possible to start
reviewing and merging it.

There is one test in patch 8/8 that shows that more than one promisor
remote can now be used, but I feel that it could be interesting to add
other such tests, so I am open to ideas in this area.

High level overview of this patch series
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  - Patch 1/8:

This makes functions in fetch-object.c return an error code, which is
necessary to later tell that they failed and try another odb remote
when there is more than one. This could also just be seen as a fix to
these functions.

  - Patch 2/8:

This introduces the minimum infrastructure for odb remotes.

  - Patches 3/8 and 4/8:

These patches implement odb_remote_get_direct() and
odb_remote_get_many_direct() using the functions from fetch-object.c.
These new functions will be used in following patches to replace the
functions from fetch-object.c.

  - Patch 5/8:

This implement odb_remote_reinit() which will be needed to reparse the
odb remote configuration.

  - Patches 6/8 and 7/8:

These patches integrate the odb remote mechanism into the
promisor/narrow clone code. The "extensions.partialclone" config
option is replaced by "odb.<name>.promisorRemote" and
"core.partialclonefilter" is replaced by "odb.<name>.partialclonefilter".

  - Patch 8/8:

This adds a test case that shows that now more than one promisor
remote can be used.

Links
~~~~~

This patch series on GitHub:

https://github.com/chriscool/git/commits/odb-remote

Version 1 and 2 of the "Promisor remotes and external ODB support" series:

https://public-inbox.org/git/20180103163403.11303-1-chriscool@tuxfamily.org/
https://public-inbox.org/git/20180319133147.15413-1-chriscool@tuxfamily.org/

Version 1 and 2 of the "Promisor remotes and external ODB support" series on GitHub:

https://github.com/chriscool/git/commits/gl-small-promisor-external-odb12
https://github.com/chriscool/git/commits/gl-small-promisor-external-odb71


Christian Couder (8):
  fetch-object: make functions return an error code
  Add initial odb remote support
  odb-remote: implement odb_remote_get_direct()
  odb-remote: implement odb_remote_get_many_direct()
  odb-remote: add odb_remote_reinit()
  Use odb_remote_get_direct() and has_external_odb()
  Use odb.origin.partialclonefilter instead of core.partialclonefilter
  t0410: test fetching from many promisor remotes

 Makefile                      |   2 +
 builtin/cat-file.c            |   5 +-
 builtin/fetch.c               |  13 ++--
 builtin/gc.c                  |   3 +-
 builtin/repack.c              |   3 +-
 cache.h                       |   2 -
 connected.c                   |   3 +-
 environment.c                 |   1 -
 fetch-object.c                |  15 +++--
 fetch-object.h                |   6 +-
 list-objects-filter-options.c |  49 ++++++++------
 list-objects-filter-options.h |   3 +-
 odb-helper.c                  |  45 +++++++++++++
 odb-helper.h                  |  18 ++++++
 odb-remote.c                  | 118 ++++++++++++++++++++++++++++++++++
 odb-remote.h                  |  10 +++
 packfile.c                    |   3 +-
 setup.c                       |   7 +-
 sha1-file.c                   |   9 +--
 t/t0410-partial-clone.sh      |  54 +++++++++++-----
 t/t5500-fetch-pack.sh         |   4 +-
 t/t5601-clone.sh              |   2 +-
 t/t5616-partial-clone.sh      |   4 +-
 unpack-trees.c                |   6 +-
 24 files changed, 306 insertions(+), 79 deletions(-)
 create mode 100644 odb-helper.c
 create mode 100644 odb-helper.h
 create mode 100644 odb-remote.c
 create mode 100644 odb-remote.h

-- 
2.17.0.590.gbd05bfcafd


^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2018-12-11  5:28 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-12-11  5:27 [PATCH v1 0/8] Many promisor remotes Christian Couder
2018-12-11  5:27 ` [PATCH v1 1/8] fetch-object: make functions return an error code Christian Couder
2018-12-11  5:27 ` [PATCH v1 2/8] Add initial support for many promisor remotes Christian Couder
2018-12-11  5:27 ` [PATCH v1 3/8] promisor-remote: implement promisors_get_direct() Christian Couder
2018-12-11  5:27 ` [PATCH v1 4/8] promisor-remote: add promisor_remote_reinit() Christian Couder
2018-12-11  5:27 ` [PATCH v1 5/8] promisor-remote: use repository_format_partial_clone Christian Couder
2018-12-11  5:27 ` [PATCH v1 6/8] Use promisors_get_direct() and has_promisor_remote() Christian Couder
2018-12-11  5:27 ` [PATCH v1 7/8] promisor-remote: parse remote.*.partialclonefilter Christian Couder
2018-12-11  5:27 ` [PATCH v1 8/8] t0410: test fetching from many promisor remotes Christian Couder
  -- strict thread matches above, loose matches on Subject: below --
2018-05-13 10:32 [PATCH v1 0/8] Introducing odb remote Christian Couder
2018-05-13 10:32 ` [PATCH v1 8/8] t0410: test fetching from many promisor remotes Christian Couder

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