Mercurial > hg
diff mercurial/revlogutils/constants.py @ 47234:616b8f412676
revlogv2: introduce a very basic docket file
This is the first stone toward using a docket file in revlogv2. Right now the
docket is very basic and only store the version number (which is -also- stored
into the index file…) and the other files have fixed name. This new
implementation break transactionally… but they are no test checking
transactionally for revlogv2… So I take this as an opportunity to start small.
They are no usage of revlogv2 outside of tests anyway.
The docket keeps the `.i` naming used by previous version index to preserve a
unique entry point. We could decide to use a different name and look it up
first, or to fully rework this in a future "store" version. However that does
not seems necessary right now.
We will re-introduces transactionality (and associated testing…) in a later
changesets.
A long list of TODOs have been added to the relevant comment.
Differential Revision: https://phab.mercurial-scm.org/D10624
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Mon, 03 May 2021 12:34:11 +0200 |
parents | 4d1c893b9095 |
children | 130c9f7ed914 |
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--- a/mercurial/revlogutils/constants.py Mon May 17 15:05:24 2021 +0200 +++ b/mercurial/revlogutils/constants.py Mon May 03 12:34:11 2021 +0200 @@ -133,20 +133,22 @@ b'inline': _no, b'generaldelta': _no, b'sidedata': False, + b'docket': False, }, REVLOGV1: { b'inline': _from_flag(FLAG_INLINE_DATA), b'generaldelta': _from_flag(FLAG_GENERALDELTA), b'sidedata': False, + b'docket': False, }, REVLOGV2: { - # There is a bug in the transaction handling when going from an - # inline revlog to a separate index and data file. Turn it off until - # it's fixed, since v2 revlogs sometimes get rewritten on exchange. - # See issue6485 + # The point of inline-revlog is to reduce the number of files used in + # the store. Using a docket defeat this purpose. So we needs other + # means to reduce the number of files for revlogv2. b'inline': _no, b'generaldelta': _yes, b'sidedata': True, + b'docket': True, }, }