Configuration influxdb v 1.7.3 for 9M ps

Hi, all. Please, help configur influxdb for remote storage prometheus metrics. I 'm having 350 node_exporeter, and 30s custom exporter. It’s now i am having 9M series ps. How are you recomend hardware config for influxdb ?!

It’s now host having:
8 CPU on 2 sockets, 12 GB Mem, storage 100G. Speed now writing 500 IOPS.