[Updated] D8431: upgrade: support upgrade and downgrade from persistent nodemap
marmoute (Pierre-Yves David)
phabricator at mercurial-scm.org
Thu May 7 21:01:23 UTC 2020
marmoute updated this revision to Diff 21315.
REPOSITORY
rHG Mercurial
CHANGES SINCE LAST UPDATE
https://phab.mercurial-scm.org/D8431?vs=21108&id=21315
BRANCH
default
CHANGES SINCE LAST ACTION
https://phab.mercurial-scm.org/D8431/new/
REVISION DETAIL
https://phab.mercurial-scm.org/D8431
AFFECTED FILES
mercurial/helptext/internals/requirements.txt
mercurial/upgrade.py
tests/test-persistent-nodemap.t
CHANGE DETAILS
diff --git a/tests/test-persistent-nodemap.t b/tests/test-persistent-nodemap.t
--- a/tests/test-persistent-nodemap.t
+++ b/tests/test-persistent-nodemap.t
@@ -439,3 +439,99 @@
.hg/store/00changelog-????????????????.nd: size=121536, sha256=bb414468d225cf52d69132e1237afba34d4346ee2eb81b505027e6197b107f03 (glob) (pure !)
.hg/store/00changelog-????????????????.nd: size=121536, sha256=909ac727bc4d1c0fda5f7bff3c620c98bd4a2967c143405a1503439e33b377da (glob) (rust !)
.hg/store/00changelog-????????????????.nd: size=121088, sha256=342d36d30d86dde67d3cb6c002606c4a75bcad665595d941493845066d9c8ee0 (glob) (no-pure no-rust !)
+
+Test upgrade / downgrade
+========================
+
+downgrading
+
+ $ cat << EOF >> .hg/hgrc
+ > [format]
+ > use-persistent-nodemap=no
+ > EOF
+ $ hg debugformat -v
+ format-variant repo config default
+ fncache: yes yes yes
+ dotencode: yes yes yes
+ generaldelta: yes yes yes
+ sparserevlog: yes yes yes
+ sidedata: no no no
+ persistent-nodemap: yes no no
+ copies-sdc: no no no
+ plain-cl-delta: yes yes yes
+ compression: zlib zlib zlib
+ compression-level: default default default
+ $ hg debugupgraderepo --run --no-backup --quiet
+ upgrade will perform the following actions:
+
+ requirements
+ preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
+ removed: persistent-nodemap
+
+ $ ls -1 .hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
+ [1]
+ $ hg debugnodemap --metadata
+
+
+upgrading
+
+ $ cat << EOF >> .hg/hgrc
+ > [format]
+ > use-persistent-nodemap=yes
+ > EOF
+ $ hg debugformat -v
+ format-variant repo config default
+ fncache: yes yes yes
+ dotencode: yes yes yes
+ generaldelta: yes yes yes
+ sparserevlog: yes yes yes
+ sidedata: no no no
+ persistent-nodemap: no yes no
+ copies-sdc: no no no
+ plain-cl-delta: yes yes yes
+ compression: zlib zlib zlib
+ compression-level: default default default
+ $ hg debugupgraderepo --run --no-backup --quiet
+ upgrade will perform the following actions:
+
+ requirements
+ preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
+ added: persistent-nodemap
+
+ $ ls -1 .hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
+ 00changelog-*.nd (glob)
+ 00changelog.n
+ 00manifest-*.nd (glob)
+ 00manifest.n
+
+ $ hg debugnodemap --metadata
+ uid: * (glob)
+ tip-rev: 5005
+ tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
+ data-length: 121088
+ data-unused: 0
+ data-unused: 0.000%
+
+Running unrelated upgrade
+
+ $ hg debugupgraderepo --run --no-backup --quiet --optimize re-delta-all
+ upgrade will perform the following actions:
+
+ requirements
+ preserved: dotencode, fncache, generaldelta, persistent-nodemap, revlogv1, sparserevlog, store
+
+ optimisations: re-delta-all
+
+ $ ls -1 .hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
+ 00changelog-*.nd (glob)
+ 00changelog.n
+ 00manifest-*.nd (glob)
+ 00manifest.n
+
+ $ hg debugnodemap --metadata
+ uid: * (glob)
+ tip-rev: 5005
+ tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
+ data-length: 121088
+ data-unused: 0
+ data-unused: 0.000%
diff --git a/mercurial/upgrade.py b/mercurial/upgrade.py
--- a/mercurial/upgrade.py
+++ b/mercurial/upgrade.py
@@ -78,6 +78,7 @@
localrepo.SPARSEREVLOG_REQUIREMENT,
localrepo.SIDEDATA_REQUIREMENT,
localrepo.COPIESSDC_REQUIREMENT,
+ localrepo.NODEMAP_REQUIREMENT,
}
for name in compression.compengines:
engine = compression.compengines[name]
@@ -105,6 +106,7 @@
localrepo.SPARSEREVLOG_REQUIREMENT,
localrepo.SIDEDATA_REQUIREMENT,
localrepo.COPIESSDC_REQUIREMENT,
+ localrepo.NODEMAP_REQUIREMENT,
}
for name in compression.compengines:
engine = compression.compengines[name]
@@ -132,6 +134,7 @@
localrepo.SPARSEREVLOG_REQUIREMENT,
localrepo.SIDEDATA_REQUIREMENT,
localrepo.COPIESSDC_REQUIREMENT,
+ localrepo.NODEMAP_REQUIREMENT,
}
for name in compression.compengines:
engine = compression.compengines[name]
@@ -990,7 +993,7 @@
Function should return ``True`` if the file is to be copied.
"""
# Skip revlogs.
- if path.endswith((b'.i', b'.d')):
+ if path.endswith((b'.i', b'.d', b'.n', b'.nd')):
return False
# Skip transaction related files.
if path.startswith(b'undo'):
diff --git a/mercurial/helptext/internals/requirements.txt b/mercurial/helptext/internals/requirements.txt
--- a/mercurial/helptext/internals/requirements.txt
+++ b/mercurial/helptext/internals/requirements.txt
@@ -142,3 +142,16 @@
August 2019). The requirement will only be present on repositories
that have opted in to this format (by having
``format.bookmarks-in-store=true`` set when they were created).
+
+persistent-nodemap
+==================
+
+The `nodemap` index (mapping nodeid to local revision number) is persisted on
+disk. This provides speed benefit (if the associated native code is used. The
+persistent nodemap is only used for two revlogs: the changelog and the manifest
+log.
+
+Support for this requirement was added in Mercurial 5.5 (released August 2020).
+Note that as of 5.5, only instalation compiled with the Rust extension will
+benefit from a speedup. The other instalation will do the necessary work to keep
+the index up to date, but will suffer a slowdown.
To: marmoute, #hg-reviewers, mharbison72, Alphare, durin42
Cc: durin42, Alphare, mercurial-patches, mharbison72, mercurial-devel
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