Hello all, We are going to deploy Openstack cloud with researchers as primary target users. We will have around 100 GPUs with 12-15 servers with Infiniband interconnect. We still do not know the exact spec of servers nor GPUs but mostly we will have A100s and Intel Xeon processors. What sort of RAM and Storage requirements we need for a cluster of this size? Of course, this depends a lot on use cases and this cloud will be primarily used for HPC and AI. For the storage, we are mainly interested in the block storage requirements for provisioning VMs. We will most probably have a shared parallel file system as scratch and project spaces. Is there any rule of thumb to get to the RAM and storage requirement numbers based on compute infrastructure we will have? If we can estimate a sort of "lower bound" that would be really helpful for us. If anyone have clusters of this size at your organizations and if you can share the RAM ans storage details of your clouds, that would be very useful for us too. Thanks a lot and have a great day!! Regards Mahendra