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Add a third I/O mode: O_DIRECT|O_SYNC, change parameters to data_io/meta_io/journal_io

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Vitaliy Filippov
2023-08-09 00:57:08 +03:00
parent ab8627c9fa
commit 7333022adf
14 changed files with 236 additions and 157 deletions
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docs/config/layout-cluster.en.md
+3 -2
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@@ -96,8 +96,9 @@ SSD cache or "media-cache" - for example, a lot of Seagate EXOS drives have
it (they have internal SSD cache even though it's not stated in datasheets).
Setting this parameter to "all" or "small" in OSD parameters requires enabling
disable_journal_fsync and disable_meta_fsync, setting it to "all" also requires
enabling disable_data_fsync.
[disable_journal_fsync](layout-osd.en.yml#disable_journal_fsync) and
[disable_meta_fsync](layout-osd.en.yml#disable_meta_fsync), setting it to
"all" also requires enabling [disable_data_fsync](layout-osd.en.yml#disable_data_fsync).
TLDR: For optimal performance, set immediate_commit to "all" if you only use
SSDs with supercapacitor-based power loss protection (nonvolatile