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493908c4b4
As mentioned in zpoolprops(7), on some SSDs, it may not be desirable to use ZFS autotrim because a large number of trim requests can degrade disk performance; instead, the pool should be manually trimmed at regular intervals. Add a new daily periodic script for this purpose, 801.trim-zfs. If enabled (daily_trim_zfs_enable=YES; the default is NO), it will run a 'zpool trim' operation on all online pools, or on the pools listed in 'daily_trim_zfs_pools'. The trim is not started if the pool is degraded (which matches the behaviour of the existing 800.scrub-zfs script) or if a trim is already running on that pool. Having autotrim enabled does not inhibit the periodic trim; it's sometimes desirable to run periodic trims even with autotrim enabled, because autotrim can elide trims for very small regions. PR: 275965 MFC after: 1 week Reviewed by: imp Pull Request: https://github.com/freebsd/freebsd-src/pull/956 |
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