Hi Guys, We have an HPC environment which currently has a single master host that stores the entire data around 100T and exports that data via NFS to the clients. We are using OpenZFS on the single master host. But now we need to store much more data around 500T and we are facing scalability issues with ZFS as it can't be scaled out. So, we are considering replacing OpenZFS with Ceph. I have gone the online docs on https://docs.ceph.com and I have come up with the following ceph deployment plan :- We would start deploying Ceph with 4 hosts ( HP Proliant servers ) each running RockyLinux 9. One of the hosts called ceph-adm will be smaller one and will have following hardware :- 2x4T SSD with raid 1 to install OS on. 8 Core with 3600MHz freq. 64G RAM We are planning to run all Ceph daemons except OSD daemon like monitor , metadata ,etc on this host. We will have 3 hosts to run OSD which will store actual data. Each OSD host will have following hardware 2x4T SSD with raid 1 to install OS on. 22X8T SSG to store data ( OSDs ) ( without partition ). We will use entire disk without partitions Each OSD host will have 128G RAM ( No swap space ) Each OSD host will have 16 cores. All 4 hosts will connect to each via 10G nic. The 500T data will be accessed by the clients. We need to have read performance as fast as possible. We can't afford data loss and downtime. So, we want to have a Ceph deployment which serves our purpose. So, please advise me if the plan that I have designed will serve our purpose. Or is there a better way , please advise that. Thanks, Gagan We have a HP storage server with 12 SDD of 5T each and have set-up hardware RAID6 on these disks. HP storage server has 64G RAM and 18 cores. So, please advise how I should go about setting up Ceph on it to have best read performance. We need fastest read performance. Thanks, Gagan