mirror_zfs/man
Brian Behlendorf c85ac731a0
Improve resilver ETAs
When resilvering the estimated time remaining is calculated using
the average issue rate over the current pass.  Where the current
pass starts when a scan was started, or restarted, if the pool
was exported/imported.

For dRAID pools in particular this can result in wildly optimistic
estimates since the issue rate will be very high while scanning
when non-degraded regions of the pool are scanned.  Once repair
I/O starts being issued performance drops to a realistic number
but the estimated performance is still significantly skewed.

To address this we redefine a pass such that it starts after a
scanning phase completes so the issue rate is more reflective of
recent performance.  Additionally, the zfs_scan_report_txgs
module option can be set to reset the pass statistics more often.

Reviewed-by: Akash B <akash-b@hpe.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #14410
2023-01-25 11:28:54 -08:00
..
man1 Update arc_summary and arcstat outputs 2023-01-05 09:29:13 -08:00
man4 Improve resilver ETAs 2023-01-25 11:28:54 -08:00
man5 Consistentify miscellaneous style on remaining manpages 2021-06-09 14:35:53 -07:00
man7 Configure zed's diagnosis engine with vdev properties 2023-01-23 13:14:25 -08:00
man8 Use setproctitle to report progress of zfs send 2023-01-17 10:17:35 -08:00
Makefile.am Add Linux namespace delegation support 2022-06-10 09:51:46 -07:00