| Hi! We’re planning our third ceph cluster and been trying to find how to maximize IOPS on this one. Our needs: * Pool for MySQL, rbd (mounted as /var/lib/mysql or equivalent on KVM servers) * Pool for storage of many small files, rbd (probably dovecot maildir and dovecot index etc) So I’ve been reading up on: and ceph-users from october 2015: We’re planning something like 5 OSD servers, with: * 4x 1.2TB Intel S3510 * 8st 4TB HDD * 2x Intel P3700 Series HHHL PCIe 400GB (one for SSD Pool Journal and one for HDD pool journal) * 2x 80GB Intel S3510 raid1 for system * 256GB RAM * 2x 8 core CPU Intel(R) Xeon(R) CPU E5-2630 v3 @ 2.40GHz or better This cluster will probably run Hammer LTS unless there are huge improvements in Infernalis when dealing 4k IOPS. The first link above hints at awesome performance. The second one from the list not so much yet.. Is anyone running Hammer or Infernalis with a setup like this? Is it a sane setup? Will we become CPU constrained or can we just throw more RAM on it? :D Kind Regards, David Majchrzak |
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