[PVE-User] CEPH planning: Expander vs. SAS 9305-16i / SAS 9305-24i

[Denny Fuchs]

hi,

we want to build a CEPH storage out of 6 OSD Nodes with 24 SSD … we consider now to buy the first test hardware and try it out. But where we don’t know, which is better: i asking :-)

We want to buy 6 x http://www.aicipc.com/ProductDetail.aspx?ref=RSC-2AH

But don’t know, if it is better to use the expander version from the chassis and a SAS 9305-16i, or the non expander version with a SAS 9305-24i  HBA. The motherboard we are testing is a https://www.asus.com/de/Commercial-Servers-Workstations/Z10PRD16/ and a powerful CPU and 128GB ram for each OSD node. The network switched from 10Gb/s ethernet to 56Gb/s Infiniband ….


I wrote also the complete (except infiniband) plan also in the forum:

https://forum.proxmox.com/threads/hw-planning-ceph-3-x-osd-cluster-for-pve-4-2.27555/#post-138692

So, what is better, with or without expander ? :-)

cu denny