Hi everyone,
I'm in the situation that i would need some advice in choosing a proper spinning hdd for ceph ( mostly used for rbd - proxmox vms ) . Looking for both sas and sata hdds.
At the moment i have very bad performance with Seagate 2.5" 5TB because they are SMR drives, which is pretty slow on random writes - which an rbd does a lot. So bassically i cannot use the sata pool without cache tiering in front of it. ( Ceph Luminous / Bluestore ), I end up with slow requests, and those Seagates get fried at a point ( about 1/month going down ) .
Can you please recommend me some spinning drives that a would suite for a rbd sata pool ? Should i definitely go for 10K hdds, or 7.2k would be good ? I'm just not sure what to buy, and i'll need about 25 of them.
Would it be some 2.5" "hi-end" hdds that i can buy or some "reasonably good" ones ?
Actual ceph networking is on 10gb/s, and on ssd pools i reach up to 8000 iops on rbd images.
Thank you !
I'm in the situation that i would need some advice in choosing a proper spinning hdd for ceph ( mostly used for rbd - proxmox vms ) . Looking for both sas and sata hdds.
At the moment i have very bad performance with Seagate 2.5" 5TB because they are SMR drives, which is pretty slow on random writes - which an rbd does a lot. So bassically i cannot use the sata pool without cache tiering in front of it. ( Ceph Luminous / Bluestore ), I end up with slow requests, and those Seagates get fried at a point ( about 1/month going down ) .
Can you please recommend me some spinning drives that a would suite for a rbd sata pool ? Should i definitely go for 10K hdds, or 7.2k would be good ? I'm just not sure what to buy, and i'll need about 25 of them.
Would it be some 2.5" "hi-end" hdds that i can buy or some "reasonably good" ones ?
Actual ceph networking is on 10gb/s, and on ssd pools i reach up to 8000 iops on rbd images.
Thank you !
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