ZFS fast scrub: Difference between revisions
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# echo "zfs_scrub_delay/W0" | mdb -kw | # echo "zfs_scrub_delay/W0" | mdb -kw | ||
zfs_scrub_delay:0x4 = 0x0 | zfs_scrub_delay:0x4 = 0x0 | ||
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This sets the scrub delay to zero... your system will do a lot of scrubbing and not so much other things. | This sets the scrub delay to zero... your system will do a lot of scrubbing and not so much other things. | ||
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# echo "zfs_scrub_delay/W4" | mdb -kw | # echo "zfs_scrub_delay/W4" | mdb -kw | ||
zfs_scrub_delay:0x0 = 0x4 | zfs_scrub_delay:0x0 = 0x4 | ||
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But remember I told you: NEVER DO THIS!!! | But remember I told you: NEVER DO THIS!!! | ||
Revision as of 23:56, 25 November 2021
NEVER DO THIS!!!
If you need a fast scrub to get to production state after an bloody hard unplanned downtime... and so on...
I would expect you to not to do this.
But it worked for me:
# echo "zfs_scrub_delay/D" | mdb -k
zfs_scrub_delay:
zfs_scrub_delay:4
# echo "zfs_scrub_delay/W0" | mdb -kw
zfs_scrub_delay:0x4 = 0x0
This sets the scrub delay to zero... your system will do a lot of scrubbing and not so much other things.
Remember to set it back to the old value later (4 in this example)!
# echo "zfs_scrub_delay/W4" | mdb -kw
zfs_scrub_delay:0x0 = 0x4
But remember I told you: NEVER DO THIS!!!
