Michael Wodniok (wodniok) writes:
> Hi all,
>
> digging around debugging, why our (small: 10 Hosts/~60 OSDs) cluster is so
> slow even while recovering I found out one of our key issues are some SSDs
> with SLC cache (in our case Samsung SSD 870 EVO) - which we just recycled
> from other use cases in the hope to speed up our mainly hdd based cluster. We
> know it's a little bit random which objects get accelerated when not used as
> cache.
Somewhat off-topic, but... may I recommend *not* using the 870s ?
There is an issue with 870s failing around 14-17 TB written if they're
not running the latest firmware... I recently pulled 25 of them out of
our storage because of this.
https://twitter.com/regnauld/status/1502185863052152833
Cheers,
Phil
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