Am 06.11.2012 01:14, schrieb Josh Durgin:
On 11/05/2012 09:13 AM, Dennis Jacobfeuerborn wrote:
Hi,
I'm thinking about building a ceph cluster and I'm wondering what a good
configuration would look like for 4-8 (and maybe more) 2HU 8-disk or 3HU
16-disk systems.
Would it make sense to make each disk an individual OSD or should I
perhaps
create several raid-0 and create OSDs from those?
This mainly depends on your ratio of disks to cpu/ram. Generally we
recommend 1GB ram and 1Ghz per OSD. If you've got enough cpu/ram,
running 1 OSD/disk is pretty common. It makes recovering from a
single disk failure faster.
Just i node while using SSDs i've seen osd processes using up to two 3.6
Ghz cores. So under heavy load and disks and network with enough speed 1
ghz might be even too low. Right now i'm calculating with 1 3.6Ghz Core
per OSD when using 10GBE and SSDs.
Greets,
Stefan
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