* stable-6.4:
Shortcut during git fetch for avoiding looping through all local refs
FetchCommand: fix fetchSubmodules to work on a Ref to a blob
Silence API warnings introduced by I466dcde6
Allow the exclusions of refs prefixes from bitmap
PackWriterBitmapPreparer: do not include annotated tags in bitmap
BatchingProgressMonitor: avoid int overflow when computing percentage
Speedup GC listing objects referenced from reflogs
FileSnapshotTest: Add more MISSING_FILE coverage
Change-Id: Id0ebfbd85eb815716383b9495eb7dd1f54cf4d74
* stable-6.3:
Shortcut during git fetch for avoiding looping through all local refs
FetchCommand: fix fetchSubmodules to work on a Ref to a blob
Silence API warnings introduced by I466dcde6
Allow the exclusions of refs prefixes from bitmap
PackWriterBitmapPreparer: do not include annotated tags in bitmap
BatchingProgressMonitor: avoid int overflow when computing percentage
Speedup GC listing objects referenced from reflogs
FileSnapshotTest: Add more MISSING_FILE coverage
Change-Id: Iefcf5d832bd0087c1027876f2200689e1150abce
* stable-6.2:
Shortcut during git fetch for avoiding looping through all local refs
FetchCommand: fix fetchSubmodules to work on a Ref to a blob
Silence API warnings introduced by I466dcde6
Allow the exclusions of refs prefixes from bitmap
PackWriterBitmapPreparer: do not include annotated tags in bitmap
BatchingProgressMonitor: avoid int overflow when computing percentage
Speedup GC listing objects referenced from reflogs
FileSnapshotTest: Add more MISSING_FILE coverage
Change-Id: I2ff386d9a096277360e6c7bd5535b49984620fb3
* stable-6.1:
Shortcut during git fetch for avoiding looping through all local refs
FetchCommand: fix fetchSubmodules to work on a Ref to a blob
Silence API warnings introduced by I466dcde6
Allow the exclusions of refs prefixes from bitmap
PackWriterBitmapPreparer: do not include annotated tags in bitmap
BatchingProgressMonitor: avoid int overflow when computing percentage
Speedup GC listing objects referenced from reflogs
FileSnapshotTest: Add more MISSING_FILE coverage
Change-Id: Iff2fba026b49463016015b2fae1a42cf76ee2dbb
* stable-6.0:
Shortcut during git fetch for avoiding looping through all local refs
FetchCommand: fix fetchSubmodules to work on a Ref to a blob
Silence API warnings introduced by I466dcde6
Allow the exclusions of refs prefixes from bitmap
PackWriterBitmapPreparer: do not include annotated tags in bitmap
BatchingProgressMonitor: avoid int overflow when computing percentage
Speedup GC listing objects referenced from reflogs
FileSnapshotTest: Add more MISSING_FILE coverage
Change-Id: Ib5055f2f3b8a313c178d6f6c7c5630285ad5a726
* stable-5.13:
Shortcut during git fetch for avoiding looping through all local refs
FetchCommand: fix fetchSubmodules to work on a Ref to a blob
Silence API warnings introduced by I466dcde6
Allow the exclusions of refs prefixes from bitmap
PackWriterBitmapPreparer: do not include annotated tags in bitmap
BatchingProgressMonitor: avoid int overflow when computing percentage
Speedup GC listing objects referenced from reflogs
FileSnapshotTest: Add more MISSING_FILE coverage
Change-Id: I58ad4c210a5e7e5a1ba6b22315b04211c8909950
The FetchProcess needs to verify that all the refs received point
to objects that are reachable from the local refs, which could be
very expensive but is needed to avoid missing objects exceptions
because of broken chains.
When the local repository has a lot of refs (e.g. millions) and the
client is fetching a non-commit object (e.g. refs/sequences/changes in
Gerrit) the reachability check on all local refs can be very expensive
compared to the time to fetch the remote ref.
Example for a 2M refs repository:
- fetching a single non-commit object: 50ms
- checking the reachability of local refs: 30s
A ref pointing to a non-commit object doesn't have any parent or
successor objects, hence would never need to have a reachability check
done. Skipping the askForIsComplete() altogether would save the 30s
time spent in an unnecessary phase.
Signed-off-by: Luca Milanesio <luca.milanesio@gmail.com>
Change-Id: I09ac66ded45cede199ba30f9e71cc1055f00941b
FetchCommand#fetchSubmodules assumed that FETCH_HEAD can always be
parsed as a tree. This isn't true if it refers to a Ref referring to a
BLOB. This is e.g. used in Gerrit for Refs like refs/sequences/changes
which are used to implement sequences stored in git.
Change-Id: I414f5b7d9f2184b2d7d53af1dfcd68cccb725ca4
When running a GC.repack() against a repository with over one
thousands of refs/heads and tens of millions of ObjectIds,
the calculation of all bitmaps associated with all the refs
would result in an unreasonable big file that would take up to
several hours to compute.
Test scenario: repo with 2500 heads / 10M obj Intel Xeon E5-2680 2.5GHz
Before this change: 20 mins
After this change and 2300 heads excluded: 10 mins (90s for bitmap)
Having such a large bitmap file is also slow in the runtime
processing and have negligible or even negative benefits, because
the time lost in reading and decompressing the bitmap in memory
would not be compensated by the time saved by using it.
It is key to preserve the bitmaps for those refs that are mostly
used in clone/fetch and give the ability to exlude some refs
prefixes that are known to be less frequently accessed, even
though they may actually be actively written.
Example: Gerrit sandbox branches may even be actively
used and selected automatically because its commits are very
recent, however, they may bloat the bitmap, making it ineffective.
A mono-repo with tens of thousands of developers may have
a relatively small number of active branches where the
CI/CD jobs are continuously fetching/cloning the code. However,
because Gerrit allows the use of sandbox branches, the
total number of refs/heads may be even tens to hundred
thousands.
Change-Id: I466dcde69fa008e7f7785735c977f6e150e3b644
Signed-off-by: Luca Milanesio <luca.milanesio@gmail.com>
The InMemoryRepository is used in tests (e.g. in gerrit tests) and it
can be useful to create a custom MemRefDatabase for some tests.
Change-Id: I6fbbbfe04400ea1edc988c8788c8eeb06ca8480a
The annotated tags should be excluded from the bitmap associated
with the heads-only packfile. However, this was not happening
because of the check of exclusion of the peeled object instead
of the objectId to be excluded from the bitmap.
Sample use-case:
refs/heads/main
^
|
commit1 <-- commit2 <- annotated-tag1 <- tag1
^
|
commit0
When creating a bitmap for the above commit graph, before this
change all the commits are included (3 bitmaps), which is
incorrect, because all commits reachable from annotated tags
should not be included.
The heads-only bitmap should include only commit0 and commit1
but because PackWriterBitPreparer was checking for the peeled
pointer of tag1 to be excluded (commit2) which was not found in
the list of tags to exclude (annotated-tag1), the commit2 was
included, even if it wasn't reachable only from the head.
Add an additional check for exclusion of the original objectId
for allowing the exclusion of annotated tags and their pointed
commits. Add one specific test associated with an annotated tag
for making sure that this use-case is covered also.
Example repository benchmark for measuring the improvement:
# refs: 400k (2k heads, 88k tags, 310k changes)
# objects: 11M (88k of them are annotate tags)
# packfiles: 2.7G
Before this change:
GC time: 5h
clone --bare time: 7 mins
After this change:
GC time: 20 mins
clone --bare time: 3 mins
Bug: 581267
Signed-off-by: Luca Milanesio <luca.milanesio@gmail.com>
Change-Id: Iff2bfc6587153001837220189a120ead9ac649dc
When cloning huge repositories I observed percentage of object counts
turning negative. This happened if lastWork * 100 exceeded
Integer.MAX_VALUE.
Change-Id: Ic5f5cf5a911a91338267aace4daba4b873ab3900
We are adding commit-graph loading to the DFS stack and the stats object doesn't have fields to track that.
This change replicates the stats of the primary index for the commit-graph.
Signed-off-by: Xing Huang <xingkhuang@google.com>
Change-Id: I4a657bed50083c4ae8bc9f059d4943d612ea2d49
This adds support for shallow cloning. The CloneCommand and the
FetchCommand now have the new options --depth, --shallow-since and
--shallow-exclude to tell the server that the client doesn't want to
download the complete history.
Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=475615
Change-Id: I8f113bed25dd6df64f2f95de6a59d4675ab8a903
GC needs to get a ReflogReader for all existing refs to list all objects
referenced from reflogs. The existing Repository#getReflogReader method
accepts the ref name and then resolves the Ref to create a ReflogReader.
GC calling that for a huge number of Refs one by one is very slow. GC
first gets all Refs in bulk and then calls getReflogReader for each of
them.
Fix this by adding another getReflogReader method to Repository which
accepts a Ref directly.
This speeds up running JGit gc on a mirror clone of the Gerrit
repository from 15:36 min to 1:08 min. The repository used in this test
had 45k refs, 275k commits and 1.2m git objects.
Change-Id: I474897fdc6652923e35d461c065a29f54d9949f4
Remove tycho-extras-version, because Tycho and Tycho Extras are
meanwhile in a single repository and maintained together.
Update
- build-helper-maven-plugin to 3.3.0
- eclipse-jarsigner-plugin to 1.3.5
- jacoco-maven-plugin to 0.8.8
- japicmp to 0.17.1
- maven-antrun-plugin to 3.1.0
- maven-clean-plugin to 3.2.0
- maven-compiler-plugin to 3.10.1
- maven-dependency-plugin to 3.5.0
- maven-deploy-plugin to 3.0.0
- maven-enforcer-plugin to 3.1.0
- maven-install-plugin to 3.1.0
- maven-jar-plugin to 3.3.0
- maven-javadoc-plugin to 3.4.1
- maven-jxr-plugin to 3.3.0
- maven-pmd-plugin to 3.20.0
- maven-project-info-reports-plugin to 3.4.2
- maven-resources-plugin to 3.3.0
- maven-shade-plugin to 3.4.1
- maven-site-plugin to 4.0.0-M4
- maven-surefire-plugin to 3.0.0-M8
- spotbugs-maven-plugin to 4.7.3.0
- spring-boot-maven-plugin to 2.7.7
Change-Id: I14d9ff06d2f509d782eb63adfa6b5733649f11f1
* stable-6.4:
Cache trustFolderStat/trustPackedRefsStat value per-instance
Refresh 'objects' dir and retry if a loose object is not found
Change-Id: Iea8038dfde29ab988501469f86ee829e578a2fe8
* stable-6.3:
Cache trustFolderStat/trustPackedRefsStat value per-instance
Refresh 'objects' dir and retry if a loose object is not found
Change-Id: I1db2b51ae8101f345d08235d4f3dc416bfcb42d5
* stable-6.2:
Cache trustFolderStat/trustPackedRefsStat value per-instance
Refresh 'objects' dir and retry if a loose object is not found
Change-Id: Ibc9bffab8c9ef9c39384b53c142d99878f7f3f98
* stable-6.1:
Cache trustFolderStat/trustPackedRefsStat value per-instance
Refresh 'objects' dir and retry if a loose object is not found
Change-Id: I9e876f72f735f58bf02c7862a3d8e657fc46a7b9
Instead of re-reading the config every time the methods using these
values were called, cache the config value at the time of instance
construction. Caching the values improves performance for each of the
method calls. These configs are set based on the filesystem storing the
repository and unlikely to change while an application is running.
Change-Id: I1cae26dad672dd28b766ac532a871671475652df
Signed-off-by: Nasser Grainawi <quic_nasserg@quicinc.com>
A new loose object may not be immediately visible on a NFS
client if it was created on another client. Refreshing the
'objects' dir and trying again can help work around the NFS
behavior.
Here's an E2E problem that this change can help fix. Consider
a Gerrit multi-primary setup with repositories based on NFS.
Add a new patch-set to an existing change and then immediately
fetch the new patch-set of that change. If the fetch is handled
by a Gerrit primary different that the one which created the
patch-set, then we sometimes run into a MissingObjectException
that causes the fetch to fail.
Bug: 581317
Change-Id: Iccc6676c68ef13a1e8b2ff52b3eeca790a89a13d
Signed-off-by: Kaushik Lingarkar <quic_kaushikl@quicinc.com>
and update
- com.google.gson to 2.10.0.v20221207-1049"
- org.apache.commons.compress to 1.22.0.v20221207-1049
- org.apache.httpcomponents.httpclient to 4.5.14.v20221207-1049
- org.apache.httpcomponents.httpcore to 4.4.16.v20221207-1049
Change-Id: I8da9be68162636ca2530ea042b069c533c7d975a
RevWalk#createCommit() will inspect the commit-graph file to find the
specified object's graph position and then return a new RevCommitCG
instance.
RevCommitGC is a RevCommit with an additional "pointer" (the position)
to the commit-graph, so it can load the headers and metadata from there
instead of the pack. This saves IO access in walks where the body is not
needed (i.e. #isRetainBody is false and #parseBody is not invoked).
RevWalk uses automatically the commit-graph if available, no action
needed from callers. The commit-graph is fetched on first access from
the reader (that internally can keep it loaded and reuse it between
walks).
The startup cost of reading the entire commit graph is small. After
testing, reading a commit-graph with 1 million commits takes less than
50ms. If we use RepositoryCache, it will not be initialized util the
commit-graph is rewritten.
Bug: 574368
Change-Id: I90d0f64af24f3acc3eae6da984eae302d338f5ee
Signed-off-by: kylezhao <kylezhao@tencent.com>
Add a couple tests that confirm what the docs say about isModified() and
equals(MISSING_FILE) behavior.
Change-Id: I6093040ba3594934c3270331405a44b2634b97c5
Signed-off-by: Nasser Grainawi <quic_nasserg@quicinc.com>
In shallow repos, GC writes to the commit-graph that shallow commits
do not have parents. This won't be true after a "git fetch --unshallow"
(and before another GC).
Do not write the commit-graph from shallow clones of a repo. The
commit-graph must have the real metadata of commits and that is not
available in a shallow view of the repo.
Change-Id: Ic9f2358ddaa607c74f4dbf289c9bf2a2f0af9ce0
Signed-off-by: kylezhao <kylezhao@tencent.com>
Currently, we always read packed-refs file when 'trustFolderStat'
is false. Introduce a new config 'trustPackedRefsStat' which takes
precedence over 'trustFolderStat' when reading packed refs. Possible
values for this new config are:
* always: Trust packed-refs file attributes
* after_open: Same as 'always', but refresh the file attributes of
packed-refs before trusting it
* never: Always read the packed-refs file
* unset: Fallback to 'trustFolderStat' to determine if the file
attributes of packed-refs can be trusted
Folks whose repositories are on NFS and have traditionally been
setting 'trustFolderStat=false' can now get some performance improvement
with 'trustPackedRefsStat=after_open' as it refreshes the file
attributes of packed-refs (at least on some NFS clients) before
considering it.
For example, consider a repository on NFS with ~500k packed-refs. Here
are some stats which illustrate the improvement with this new config
when reading packed refs on NFS:
trustFolderStat=true trustPackedRefsStat=unset: 0.2ms
trustFolderStat=false trustPackedRefsStat=unset: 155ms
trustFolderStat=false trustPackedRefsStat=after_open: 1.5ms
Change-Id: I00da88e4cceebbcf3475be0fc0011ff65767c111
Signed-off-by: Kaushik Lingarkar <quic_kaushikl@quicinc.com>
A ternary search tree is a type of tree where nodes are arranged in a
manner similar to a binary search tree, but with up to three children
rather than the binary tree's limit of two.
Each node of a ternary search tree stores a single character, a
reference to a value object and references to its three children named
equal kid, lo kid and hi kid. The lo kid pointer must point to a node
whose character value is less than the current node. The hi kid pointer
must point to a node whose character is greater than the current
node.[1] The equal kid points to the next character in the word. Each
node in a ternary search tree represents a prefix of the stored strings.
All strings in the middle subtree of a node start with that prefix.
Like other prefix trees, a ternary search tree can be used as an
associative map with the ability for incremental string search. Ternary
search trees are more space efficient compared to standard prefix trees,
at the cost of speed.
They allow efficient prefix search which is important to implement
searching refs by prefix in a RefDatabase.
Searching by prefix returns all keys if the prefix is an empty string.
Bug: 576165
Change-Id: If160df70151a8e1c1bd6716ee4968e4c45b2c7ac
FileRepository's ObjectReader#getCommitGraph will return commit-graph
when it exists and core.commitGraph is true.
DfsRepository is not supported currently.
Change-Id: I992d43d104cf542797e6949470e95e56de025107
Signed-off-by: kylezhao <kylezhao@tencent.com>
If the last line came from the patch, use the patch to determine whether
or not there should be a trailing newline. Otherwise use the old text.
Add test cases for
- no newline at end, last line not in patch hunk
- no newline at end, last line in patch hunk
- patch removing the last newline
- patch adding a newline at the end of file not having one
all for core.autocrlf false, true, and input.
Add a test case where the "no newline" indicator line is not the last
line of the last hunk. This can happen if the patch ends with removals
at the file end.
Bug: 581234
Change-Id: I09d079b51479b89400ad300d0662c1dcb50deab6
Also-by: Yuriy Mitrofanov <a2terminator@mail.ru>
Signed-off-by: Thomas Wolf <twolf@apache.org>
This change makes JGit can read .git/objects/info/commit-graph file
and then get CommitGraph.
Loading a new commit-graph into memory requires additional time. After
testing, loading a copy of the Linux's commit-graph(1039139 commits)
is under 50ms.
Bug: 574368
Change-Id: Iadfdd6ed437945d3cdfdbe988cf541198140a8bf
Signed-off-by: kylezhao <kylezhao@tencent.com>
Ivan Frade