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Add a note about the journaling mode in the OPFS VFS. No code changes.

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FossilOrigin-Name: e79c95fc130fc302719690eb6391d96070aff825b2b51ef6c4ad459d9a8918d7
This commit is contained in:
stephan 2023-04-24 04:25:42 +00:00
parent 022a042897
commit 92df71a360
3 changed files with 17 additions and 9 deletions
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10
ext/wasm/api/sqlite3-vfs-opfs.c-pp.js
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@ -1189,7 +1189,15 @@ const installOpfsVfs = function callee(options){
/* Truncate journal mode is faster than delete for /* Truncate journal mode is faster than delete for
this vfs, per speedtest1. That gap seems to have closed with this vfs, per speedtest1. That gap seems to have closed with
Chrome version 108 or 109, but "persist" is very roughly 5-6% Chrome version 108 or 109, but "persist" is very roughly 5-6%
faster than truncate in initial tests. */ faster than truncate in initial tests.
For later analysis: Roy Hashimoto notes that TRUNCATE
and PERSIST modes may decrease OPFS concurrency because
multiple connections can open the journal file in those
modes:
https://github.com/rhashimoto/wa-sqlite/issues/68
*/
"pragma journal_mode=persist;", "pragma journal_mode=persist;",
/* /*
This vfs benefits hugely from cache on moderate/large This vfs benefits hugely from cache on moderate/large

14
manifest
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@ -1,5 +1,5 @@
C CLI\sto\shave\s"undocumented"\sdot-commands,\snot\susually\sshown\sby\s.help C Add\sa\snote\sabout\sthe\sjournaling\smode\sin\sthe\sOPFS\sVFS.\sNo\scode\schanges.
D 2023-04-23T00:12:23.282 D 2023-04-24T04:25:42.837
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -496,7 +496,7 @@ F ext/wasm/api/sqlite3-api-worker1.js 40a5b1813fcbe789f23ae196c833432c8c83e7054d
F ext/wasm/api/sqlite3-license-version-header.js 0c807a421f0187e778dc1078f10d2994b915123c1223fe752b60afdcd1263f89 F ext/wasm/api/sqlite3-license-version-header.js 0c807a421f0187e778dc1078f10d2994b915123c1223fe752b60afdcd1263f89
F ext/wasm/api/sqlite3-opfs-async-proxy.js 70914ae97784d3028150bbf252e07a423056c42cc345903c81b5fae661ce512f F ext/wasm/api/sqlite3-opfs-async-proxy.js 70914ae97784d3028150bbf252e07a423056c42cc345903c81b5fae661ce512f
F ext/wasm/api/sqlite3-v-helper.js e5c202a9ecde9ef818536d3f5faf26c03a1a9f5192b1ddea8bdabf30d75ef487 F ext/wasm/api/sqlite3-v-helper.js e5c202a9ecde9ef818536d3f5faf26c03a1a9f5192b1ddea8bdabf30d75ef487
F ext/wasm/api/sqlite3-vfs-opfs.c-pp.js 69987029bead5a35f1b854e50c3453b527a497a2be35910b2cf07a4d36ec2299 F ext/wasm/api/sqlite3-vfs-opfs.c-pp.js 14130dc3f0830cd994162684eee3c42615aa3bca15950d2a7b48fe5c4b6e657f
F ext/wasm/api/sqlite3-wasi.h 25356084cfe0d40458a902afb465df8c21fc4152c1d0a59b563a3fba59a068f9 F ext/wasm/api/sqlite3-wasi.h 25356084cfe0d40458a902afb465df8c21fc4152c1d0a59b563a3fba59a068f9
F ext/wasm/api/sqlite3-wasm.c c42413ca9f3e64c424b2bbfc5decf639670ca38bc8f7afb7760d5379398c9307 F ext/wasm/api/sqlite3-wasm.c c42413ca9f3e64c424b2bbfc5decf639670ca38bc8f7afb7760d5379398c9307
F ext/wasm/api/sqlite3-worker1-promiser.c-pp.js 2710a06a59620c6bf7ce298ab1fb6c9ce825b9f9379728b74c486db6613beecc F ext/wasm/api/sqlite3-worker1-promiser.c-pp.js 2710a06a59620c6bf7ce298ab1fb6c9ce825b9f9379728b74c486db6613beecc
@ -2059,8 +2059,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P f097ca70b5b967d1aadebd74ac5020813e00b7c30cc543814dbf5f359d1328f1 P 17f5dd2d2ae02a95180b9208b7de805922ba20271d3263e3193f0d46f4ec324c
R 62624db0a9c4c2fd6a3100f573d3f96a R 7c6f5a98ea12f09a60bc441886d297ed
U larrybr U stephan
Z 113b1c901dbc06332b9973dc3c2cd6a4 Z c684703beca8cd9cb5def7974649e125
# Remove this line to create a well-formed Fossil manifest. # Remove this line to create a well-formed Fossil manifest.

2
manifest.uuid
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@ -1 +1 @@
17f5dd2d2ae02a95180b9208b7de805922ba20271d3263e3193f0d46f4ec324c e79c95fc130fc302719690eb6391d96070aff825b2b51ef6c4ad459d9a8918d7