I use NFS, which works really great and is faster than what most people believe. With the exception of no local page cache which impact latency for some applica

I use NFS, which works really great and is faster than what most people believe. With the exception of no local page cache which impact latency for some applications. iSCSI is another great alternative, and with iSCSI you will also benefit from your local page cache. Though only one machine can use one iSCSI volume at the time. NFS can be shared between different machines. In my setup there is no special network tuning either, it is completely basic MTU is 1500, NO VLAN's, both iSCSI and regular network traffic works great without impacting for each other. Performance is excellent with the cheap Mellanox ConnextX-2 ethernet cards you find on Ebay for 20 USD. There are some really excellent, cheap, silent and with 10G SFP+ ports network switches available too for just 100USD