Hi George, We have several journal partition on our SSDs too. Using ceph-deploy utility (as Dan mentioned before),I think it is best way:
ceph-deploy osd create HOST:DISK[:JOURNAL] [HOST:DISK[:JOURNAL]...] where journal will be the path to journal disk (not to partition): ceph-deploy osd create osdserver01:sda:/dev/sdm osdserver01:/sdb:/dev/sdm #(this will create sda1, sdm1 and sdb1, sdm2 , sdm1 and sdm2 journal). Be sure the disks are empty using "ceph-deploy osd list" and "ceph-deploy osd zap". regards, I 2016-07-06 14:11 GMT+02:00 Dan van der Ster <d...@vanderster.com>: > We have 5 journal partitions per SSD. Works fine (on el6 and el7). > > Best practice is to use ceph-disk: > > ceph-disk prepare /dev/sde /dev/sdc # where e is the osd, c is an SSD. > > -- Dan > > > On Wed, Jul 6, 2016 at 2:03 PM, George Shuklin <george.shuk...@gmail.com> > wrote: > > Hello. > > > > I've been testing Intel 3500 as journal store for few HDD-based OSD. I > > stumble on issues with multiple partitions (>4) and UDEV (sda5, sda6,etc > > sometime do not appear after partition creation). And I'm thinking that > > partition is not that useful for OSD management, because linux do no > allow > > partition rereading with it contains used volumes. > > > > So my question: How you store many journals on SSD? My initial thoughts: > > > > 1) filesystem with filebased journals > > 2) LVM with volumes > > > > Anything else? Best practice? > > > > P.S. I've done benchmarking: 3500 can support up to 16 10k-RPM HDD. > > _______________________________________________ > > ceph-users mailing list > > ceph-users@lists.ceph.com > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- ############################################################################ Iban Cabrillo Bartolome Instituto de Fisica de Cantabria (IFCA) Santander, Spain Tel: +34942200969 PGP PUBLIC KEY: http://pgp.mit.edu/pks/lookup?op=get&search=0xD9DF0B3D6C8C08AC ############################################################################ Bertrand Russell: *"El problema con el mundo es que los estúpidos están seguros de todo y los inteligentes están llenos de dudas*"
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