Not with Bluestore, it really isn't. I have a very fast enterprise NVME in front of HDD and the only thing it does is it helps with DB latency. Writes are as slow as the HDD. Z On Sun, Dec 5, 2021 at 12:26 PM Szabo, Istvan (Agoda) < Istvan.Szabo@xxxxxxxxx> wrote: > It worth to separate if you have faster drive, let’s say a write optimized > nvme or optane drive. > > Istvan Szabo > Senior Infrastructure Engineer > --------------------------------------------------- > Agoda Services Co., Ltd. > e: istvan.szabo@xxxxxxxxx > --------------------------------------------------- > > On 2021. Dec 5., at 10:38, Md. Hejbul Tawhid MUNNA <munnaeebd@xxxxxxxxx> > wrote: > > Email received from the internet. If in doubt, don't click any link nor > open any attachment ! > ________________________________ > > 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 > > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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