Option 1 is the official way, option 2 will be a lot faster if it works for you (I was never in the situation requiring this so can't say) and option 3 is for filestore and not applicable to bluestore
On Wed, 10 Jul 2019 at 07:55, Davis Mendoza Paco <davis.men...@gmail.com> wrote: > What would be the most appropriate procedure to move blockdb/wal to SSD? > > 1.- remove the OSD and recreate it (affects the performance) > ceph-volume lvm prepare --bluestore --data <device> --block.wal > <wal-device> --block.db <db-device> > > 2.- Follow the documentation > > http://heiterbiswolkig.blogs.nde.ag/2018/04/08/migrating-bluestores-block-db/ > > 3.- Follow the documentation > > https://swamireddy.wordpress.com/2016/02/19/ceph-how-to-add-the-ssd-journal/ > > Thanks for the help > > El dom., 7 jul. 2019 a las 14:39, Christian Wuerdig (< > christian.wuer...@gmail.com>) escribió: > >> One thing to keep in mind is that the blockdb/wal becomes a Single Point >> Of Failure for all OSDs using it. So if that SSD dies essentially you have >> to consider all OSDs using it as lost. I think most go with something like >> 4-8 OSDs per blockdb/wal drive but it really depends how risk-averse you >> are, what your budget is etc. Given that you only have 5 nodes I'd probably >> go for fewer OSDs per blockdb device. >> >> >> On Sat, 6 Jul 2019 at 02:16, Davis Mendoza Paco <davis.men...@gmail.com> >> wrote: >> >>> Hi all, >>> I have installed ceph luminous, witch 5 nodes(45 OSD), each OSD server >>> supports up to 16HD and I'm only using 9 >>> >>> I wanted to ask for help to improve IOPS performance since I have about >>> 350 virtual machines of approximately 15 GB in size and I/O processes are >>> very slow. >>> You who recommend me? >>> >>> In the documentation of ceph recommend using SSD for the journal, my >>> question is >>> How many SSD do I have to enable per server so that the journals of the >>> 9 OSDs can be separated into SSDs? >>> >>> I currently use ceph with OpenStack, on 11 servers with SO Debian >>> Stretch: >>> * 3 controller >>> * 3 compute >>> * 5 ceph-osd >>> network: bond lacp 10GB >>> RAM: 96GB >>> HD: 9 disk SATA-3TB (bluestore) >>> >>> -- >>> *Davis Mendoza P.* >>> _______________________________________________ >>> ceph-users mailing list >>> ceph-users@lists.ceph.com >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>> >> > > -- > *Davis Mendoza P.* >
_______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
