Hi, On 10/7/24 09:27, Phong Tran Thanh wrote:
How about the disable scrub and deep-scrub
neither scrubbing nor deep-scrubbing should be disabled, it is an integral part of ensuring data consistency and data availability. if you disable it, ceph will not know when/if data on the disks/ssds has silently been corrupted due to e.g. media faults/degradation and therefore will not be able to fix it for you. if you don't notice it in time and manually correct it, you will loose your data.
i want to disable it because of its effect on many I/O of my cluster.
on small clusters, this can be indeed an issue. I'd recommend to adjust the settings for how much scrubbing is done in parallel (prefered) as well as how often (last resort). have a look at the documentation here: https://docs.ceph.com/en/latest/rados/configuration/osd-config-ref/#scrubbin...
If enabled, scrubbing is not complete and takes a long time.
depending on the hardware/disk sizes, scrubbing can indeed take quite some time. but that is normal and not something to worry about. Regards, Daniel