Thanks Eugen for pointing it out. I reread this link. https://ceph.readthedocs.io/en/latest/rados/configuration/bluestore-config-ref/ It seems that, for the mix of HDD and SSD, I don't need to create WAL device, just primary on HDD and DB on SSD, and WAL will be using DB device cause it's faster. Is that correct?
Tony > -----Original Message----- > From: Eugen Block <ebl...@nde.ag> > Sent: Monday, August 24, 2020 1:19 AM > To: ceph-users@ceph.io > Subject: [ceph-users] Re: Add OSD with primary on HDD, WAL and DB on SSD > > Hi, > > if you shared your drivegroup config we might be able to help identify > your issue. ;-) > > The last example in [1] shows the "wal_devices" filter for splitting wal > and db. > > Regards, > Eugen > > > [1] https://docs.ceph.com/docs/master/cephadm/drivegroups/#dedicated- > wal-db > > > > Zitat von Tony Liu <tonyliu0...@hotmail.com>: > > > Hi, > > > > I am able to add OSD with primary on HDD, WAL and DB on SSD on > > dashboard. LVs are created on SSD for OSDs. > > How can I achieve the same by CLI? > > > > I tried with drivegroups, which adds OSD, but not WAL and DB. > > Should I handle LV for WAL and DB separately? > > Anything I am missing here? > > > > > > Thanks! > > > > Tony > > > > > > _______________________________________________ > > ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an > > email to ceph-users-le...@ceph.io > > > _______________________________________________ > ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an > email to ceph-users-le...@ceph.io _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
