Hello Mevludin Blazevic, Yes it is quite possible, I did it on my cluster. I put the cephDB (WAL + RocksDB) hard drives on the SSD drives. That increases the performance of HDD. Regards -----Message d'origine----- De : Mevludin Blazevic <mblazevic@xxxxxxxxxxxxxx> Envoyé : vendredi 22 octobre 2021 11:30 À : Ceph Users <ceph-users@xxxxxxx> Objet : Ceph performance optimization with SSDs Caution! External email. Do not open attachments or click links, unless this email comes from a known sender and you know the content is safe. Dear Ceph users, I have a small Ceph cluster where each host consist of a small amount of SSDs and a larger number of HDDs. Is there a way to use the SSDs as performance optimization such as putting OSD Journals to the SSDs and/or using SSDs for caching? Best regards, Mevludin -- Mevludin Blazevic, M.Sc. University of Koblenz-Landau Computing Centre (GHRKO) Universitaetsstrasse 1 D-56070 Koblenz, Germany Room A023 Tel: +49 261/287-1326 _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx