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.*
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