>>So, what is better, with or without expander ? :-) it's also better without expander.
expander works like a switch, so the disks share the sas bandwidth. and also, sometime, expander firmware can be buggy, can give timeout,.... without expander, you should have a dedicated sas connection by disk. ----- Mail original ----- De: "Denny Fuchs" <[email protected]> À: "proxmoxve" <[email protected]> Envoyé: Jeudi 29 Septembre 2016 21:46:30 Objet: [PVE-User] CEPH planning: Expander vs. SAS 9305-16i / SAS 9305-24i 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 _______________________________________________ pve-user mailing list [email protected] http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user _______________________________________________ pve-user mailing list [email protected] http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
