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:
https://communities.intel.com/community/itpeernetwork/blog/2015/11/20/the-future-ssd-is-here-pcienvme-boosts-ceph-performance
and ceph-users from october 2015:
http://www.spinics.net/lists/ceph-users/msg22494.html
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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