[pve-devel] SSD only Ceph cluster

Alexandre DERUMIER aderumier at odiso.com
Sat Aug 30 15:34:59 CEST 2014


Hi,

currently with firefly, you can expect around 3000-5000 iops by osd,

so any good ssd should be ok.

Recent discussion on ceph mailing list, said that they have remove a lot of lock and bottleneck is current master git. (with performance x5)
https://www.mail-archive.com/ceph-users@lists.ceph.com/msg12486.html

Check this discussion, they are a lot of config samples to get the most performance.


I'll build a full ssd cluster next year, don't have choose ssd model yet.
(maybe intel s3500 800GB or newer models with replication x2)



----- Mail original ----- 

De: "Martin Maurer" <martin at proxmox.com> 
À: pve-devel at pve.proxmox.com 
Envoyé: Samedi 30 Août 2014 12:59:17 
Objet: [pve-devel] SSD only Ceph cluster 

Hi, 

I am looking for the best suitable SSD drives for a Proxmox VE Ceph cluster in our test-lab. The current plan is to use 4 x 512 GB SSD per server for OSD. (12 * 512 GB drives, total net capacity of 2 TB , with a replication of 3.) 

Based on features (power loss protection) and price, the Crucial MX100 looks like a good candidate for this setup. 

Crucial MX100 
- http://www.thessdreview.com/our-reviews/crucial-mx100-ssd-review-256-512-gb/ 
- http://www.anandtech.com/show/8066/crucial-mx100-256gb-512gb-review 

I will connect the SSDs on LSI SAS 9207-8i controllers, using servers and network like described here: 
http://pve.proxmox.com/wiki/Ceph_Server#Recommended_hardware 

Any other recommendations for SSDs or hints to get the best out for this? 

Thanks, 

Martin 

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