2x10gig lag across two switches with 2x40gig. should be enough bandwidth On Mon, Feb 9, 2015 at 6:10 AM, Eneko Lacunza <elacunza@xxxxxxxxx> wrote: > Hi, > > The common recommendation is to use a good (Intel S3700) SSD disk for > journals for each 3-4 OSDs, or otherwise to use internal journal on each > OSD. Don't put more than one journal on the same spinning disk. > > Also, it is recommended to use 500G-1TB disks, specially if you have a 1gbit > network; otherwise when a OSD fails recover time can be quite long. Also > look in the mailing list archives for some tunning of backfiling for smalls > ceph clusters. > > Cheers. > Eneko > > > On 06/02/15 16:48, pixelfairy wrote: >> >> 3 nodes, each with 2x1TB in a raid (for /) and 6x4TB for storage. all >> of this will be used for block devices for kvm instances. typical >> office stuff. databases, file servers, internal web servers, a couple >> dozen thin clients. not using the object store or cephfs. >> >> i was thinking about putting the journals on the root disk (this is >> how my virtual cluster works, because in that version the osds are 4G >> instead of 4TB), and keeping that on its current raid 1, for >> resiliency but im worried about making a performance bottleneck. >> tempted to swap these out with ssds. if so, how big should i get? is >> 1/2TB enough? >> >> the other thought was little partitions on each osd. were doing xfs >> because i dont know enough about brtfs to feel comfortable with that. >> would the performance degredation be worse? >> >> is there a better way? >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > > -- > Zuzendari Teknikoa / Director Técnico > Binovo IT Human Project, S.L. > Telf. 943575997 > 943493611 > Astigarraga bidea 2, planta 6 dcha., ofi. 3-2; 20180 Oiartzun (Gipuzkoa) > www.binovo.es > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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