I am currently looking for drives for an upcoming proxmox server build.
So it is going to be mostly random read / write and not a lot of sequential.
One option would be to go with "normal" m2 ssds on a pcie riser.
The server is pcie gen3 and now i am thinking about just going with gen4 drives,
bc the cost is not to much different and i have them in case i upgrade in the future to a newer platform.
I am aware that they will obviously be limited by the gen3 pcie interface for sequentiell speeds.
But what about random speed / iops?, most of the gen3 ssds i found where around 350k iops while gen4 where around 700k
Would a gen4 ssd on a gen3 board still achieve those iops (or at least better ones than the gen3 ssds like reach 500k or sth)?
My mathematical thoughts where the following
pcie x4 gen3 bandwith - 3500mb/s = 3 560 000kb/s
4k iops ~ 4000kb each
3 560 000 / 4 = 896 000
Am i wrong or would a pcie gen3 x4 be able to do close to 900k iops (theoretically) at 4k size?
Also in case i upgrade to a gen4 board in the future i would definitely have faster drives if i go with gen4 now.
And yes i am aware of low endurance / tbw and missing plp on some consumer ssds, but lets leave that out for now.
What are your thoughts?
So it is going to be mostly random read / write and not a lot of sequential.
One option would be to go with "normal" m2 ssds on a pcie riser.
The server is pcie gen3 and now i am thinking about just going with gen4 drives,
bc the cost is not to much different and i have them in case i upgrade in the future to a newer platform.
I am aware that they will obviously be limited by the gen3 pcie interface for sequentiell speeds.
But what about random speed / iops?, most of the gen3 ssds i found where around 350k iops while gen4 where around 700k
Would a gen4 ssd on a gen3 board still achieve those iops (or at least better ones than the gen3 ssds like reach 500k or sth)?
My mathematical thoughts where the following
pcie x4 gen3 bandwith - 3500mb/s = 3 560 000kb/s
4k iops ~ 4000kb each
3 560 000 / 4 = 896 000
Am i wrong or would a pcie gen3 x4 be able to do close to 900k iops (theoretically) at 4k size?
Also in case i upgrade to a gen4 board in the future i would definitely have faster drives if i go with gen4 now.
And yes i am aware of low endurance / tbw and missing plp on some consumer ssds, but lets leave that out for now.
What are your thoughts?