[ceph-users] Re: Deep-scrub much slower than HDD speed

Den fre 28 apr. 2023 kl 14:51 skrev Niklas Hambüchen <niklas@benaco.com>:

Hi all,

...

Scrubs only read data that does exist in ceph as it exists, not every sector of the drive, written or not.

Thanks, this does explain it.

I just discovered:

ZFS had this problem in the past:

* https://utcc.utoronto.ca/~cks/space/blog/solaris/ZFSNonlinearScrubs?showcomm...

That one talks about resilvering, which is not the same as neither ZFS scrubs nor ceph scrubs. Resilvering is copying/moving/rewriting data, which scrubs are not. -- May the most significant bit of your life be positive.