On 4/12/21 5:46 PM, Dan van der Ster wrote:
> Hi all,
>
> bdev_enable_discard has been in ceph for several major releases now
> but it is still off by default.
> Did anyone try it recently -- is it safe to use? And do you have perf
> numbers before and after enabling?
>
I have done so on SATA SSDs in a few cases and: it worked
Did I notice a real difference? Not really.
It's highly debated if this still makes a difference with modern flash
devices. I don't think there is a real conclusion if you still need to
trim/discard blocks.
Wido
> Cheers, Dan
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