I can only acknowledge this. Speed went down as the cache tier went full. Even with superfast PCIe SSDs.
Additionally i think it is error prone. I ran into the problem, that a ssd stuck because it was full causing the complete storage to stuck. There is a parameter for the maximum size of the cache, but it does not prevent a single ssd in the cache-tier to be filled completely - at least i didn't find any method despite of the balance factor for the osds, but that didn't help. I my setup there were 3 SSDs for caching. One of them went full, even when the sum of the used storage was smaller than the maximum cache size. Kind Regards Valentin ________________________________________ Von: pve-user [pve-user-boun...@pve.proxmox.com]" im Auftrag von "Lindsay Mathieson [lindsay.mathie...@gmail.com] Gesendet: Sonntag, 9. Oktober 2016 00:21 An: PVE User List Betreff: Re: [PVE-User] Ceph Cache Tiering On 9/10/2016 7:45 AM, Lindsay Mathieson wrote: > cache tiering was limited and a poor fit for VM Hosting, generally the > performance was with it "was *worse* with it" :) -- Lindsay Mathieson _______________________________________________ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user _______________________________________________ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
