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openzfs / zfs

OpenZFS on Linux and FreeBSD
https://openzfs.github.io/openzfs-docs
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Are zfs_scrub_delay and zfs_scan_idle no longer tunneable? #14132

Open thatguyatgithub opened 1 year ago

thatguyatgithub commented 1 year ago

Hello. I'm using zfs-2.1.6-2 on Debian with Linux 6.0.0-2-amd64 system.

When attempting to speed up the scrub process, I was not able to find any of the referred zfs_scrub_delay and zfs_scan_idle parameters on the sysfs at /sys/module/zfs/parameters/*.

I'm kind of desperate because the scrub process is increasingly taking more and more, and the 300G of data will take longer than a month by this rate :-(

I was following this https://openzfs.github.io/openzfs-docs/Performance%20and%20Tuning/ZIO%20Scheduler.html, which appears to be the latest reference. Any idea which parameters have superseded them?

rincebrain commented 1 year ago

You may find the notes in #10253 germane to your interests.

amotin commented 1 year ago

What have you done to your pool to make 300GB scrub run for a month? Are you using some incredibly small blocks and having terrible fragmentation? Of your pool is constantly busy with workload? Or something is failing?