Dear Zakhar and Anthony, Thank you for your valuable feedback. Maybe, my information was wrong. after creating VG and LV our command was below to create osd for SATA-HDD ceph-deploy osd create --bluestore --data ceph-block-2/block-2 --block-db ceph-db-0/db-2 cephosd1 So, we are using separate block db. Currently we are planning to install new OSD with SATA-SSD. so block-db will not be required. we will use device-class and different replicated_rule $ceph osd crush set-device-class SSD osd.10 $ceph osd crush rule create-replicated replicated_rule_SSD default host SSD Are we good to go? Regards, Munna On Sun, Dec 5, 2021 at 3:09 PM Zakhar Kirpichenko <zakhar@xxxxxxxxx> wrote: > Hi! > > If you use SSDs for OSDs, there's no real benefit from putting DB/WAL on a > separate drive. > > Best regards, > Z > > On Sun, Dec 5, 2021 at 10:15 AM Md. Hejbul Tawhid MUNNA < > munnaeebd@xxxxxxxxx> wrote: > >> Hi, >> >> We are running openstack cloud with backend ceph storage. Currently we >> have >> only HDD storage in our ceph cluster. Now we are planning to add new >> server and osd with SSD disk. Currently we are using separate SSD disk for >> journal disk. >> >> Now if we install new OSD with SSD disk, do we need separate SSD disk for >> the journal? What will be the best approach. >> >> Regards, >> Munna >> _______________________________________________ >> 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
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