##// END OF EJS Templates
upstream » mercurial-mirror
RSS

Clone from https://www.mercurial-scm.org/repo/hg-all

nodemap: introduce append-only incremental update of the persistent data...
nodemap: introduce append-only incremental update of the persistent data Rewriting the full nodemap for each transaction has a cost we would like to avoid. We introduce a new way to write persistent nodemap data by adding new information at the end for file. Any new and updated block as added at the end of the file. The last block is the new root node. With this method, some of the block already on disk get "dereferenced" and become dead data. In later changesets, We'll start tracking the amount of dead data to eventually re-generate a full nodemap. Differential Revision: https://phab.mercurial-scm.org/D7886
marmoute - - Load All Authors

File last commit:

r44805:50ad851e default
r44805:50ad851e default
Show More
test-persistent-nodemap.t
67 lines | 2.9 KiB | text/troff | Tads3Lexer
/ tests / test-persistent-nodemap.t
History | Annotation | Raw |Copy content |Copy permalink
===================================
Test the persistent on-disk nodemap
===================================
$ hg init test-repo
$ cd test-repo
$ cat << EOF >> .hg/hgrc
> [experimental]
> exp-persistent-nodemap=yes
> [devel]
> persistent-nodemap=yes
> EOF
$ hg debugbuilddag .+5000
$ f --size .hg/store/00changelog.n
.hg/store/00changelog.n: size=18
$ f --sha256 .hg/store/00changelog-*.nd
.hg/store/00changelog-????????????????.nd: sha256=b961925120e1c9bc345c199b2cc442abc477029fdece37ef9d99cbe59c0558b7 (glob)
$ hg debugnodemap --dump-new | f --sha256 --size
size=122880, sha256=b961925120e1c9bc345c199b2cc442abc477029fdece37ef9d99cbe59c0558b7
$ hg debugnodemap --dump-disk | f --sha256 --bytes=256 --hexdump --size
size=122880, sha256=b961925120e1c9bc345c199b2cc442abc477029fdece37ef9d99cbe59c0558b7
0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0010: ff ff ff ff ff ff ff ff ff ff fa c2 ff ff ff ff |................|
0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0030: ff ff ff ff ff ff ed b3 ff ff ff ff ff ff ff ff |................|
0040: ff ff ff ff ff ff ee 34 00 00 00 00 ff ff ff ff |.......4........|
0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0080: ff ff ff ff ff ff f8 50 ff ff ff ff ff ff ff ff |.......P........|
0090: ff ff ff ff ff ff ff ff ff ff ec c7 ff ff ff ff |................|
00a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00b0: ff ff ff ff ff ff fa be ff ff f2 fc ff ff ff ff |................|
00c0: ff ff ff ff ff ff ef ea ff ff ff ff ff ff f9 17 |................|
00d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
$ hg debugnodemap --check
revision in index: 5001
revision in nodemap: 5001
add a new commit
$ hg up
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo foo > foo
$ hg add foo
$ hg ci -m 'foo'
$ f --size .hg/store/00changelog.n
.hg/store/00changelog.n: size=18
(The pure code use the debug code that perform incremental update, the C code reencode from scratch)
#if pure
$ f --sha256 .hg/store/00changelog-*.nd --size
.hg/store/00changelog-????????????????.nd: size=123072, sha256=136472751566c8198ff09e306a7d2f9bd18bd32298d614752b73da4d6df23340 (glob)
#else
$ f --sha256 .hg/store/00changelog-*.nd --size
.hg/store/00changelog-????????????????.nd: size=122880, sha256=bfafebd751c4f6d116a76a37a1dee2a251747affe7efbcc4f4842ccc746d4db9 (glob)
#endif
$ hg debugnodemap --check
revision in index: 5002
revision in nodemap: 5002