NVMe Journal and Mixing IO

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Hi,

We are designing a new Ceph cluster. Some of the cluster wil be used to run vms and most of it wil be used for file storage and object storage. 
We want to separate the workload for vms (high IO / small block) from the bulk storage (big block lots of latency) since mixing IO seems to be a bad idea. 

The new NVMe disks (for example Intel P3600 or P3700) can handle 64K queues with 64K commands each while AHCI can handle 1 queue with 32 commands.

Would the performance loss from mixing IO be less if you would use NVMe disks?

Thnx!

Greetinx Atze
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