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Add orphan_scan_delay_ms mount option

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Add a mount option to set the delay betwen scanning of the orphan list.
The sysfs file for the option is writable so this option can be set at
run time.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2022-02-11 12:55:25 -08:00
parent f3b7c683f0
commit a67ea30bb7
5 changed files with 114 additions and 21 deletions
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15
utils/man/scoutfs.5
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@@ -21,6 +21,21 @@ contains the filesystem's metadata.
.sp
This option is required.
.TP
.B orphan_scan_delay_ms=<number>
This option sets the average expected delay, in milliseconds, between
each mount's scan of the global orphaned inode list. Jitter is added to
avoid contention so each individual delay between scans is a random
value up to 20% less than or greater than this average expected delay.
.sp
The minimum value for this option is 100ms which is very short and is
only reasonable for testing or experiments. The default is 10000ms (10
seconds) and the maximum is 60000ms (1 minute).
.sp
This option can be changed in an active mount by writing to its file in
the options directory in the mount's sysfs directory. Writing a new
value will cause the next pending orphan scan to be rescheduled
with the newly written delay time.
.TP
.B quorum_slot_nr=<number>
The quorum_slot_nr option assigns a quorum member slot to the mount.
The mount will use the slot assignment to claim exclusive ownership of