On Thu, Oct 24, 2013 at 5:15 AM, Leon Fauster leonfauster@googlemail.com wrote:
What kind of throughput and latency are you talking about here? NFS shouldn't add that much overhead to reads compared to disk head latency and if you enable client caching might be considerably faster. If you are writing over NFS you don't get the same options, though and sync mounts are going to be slow.
bonded (just for failover) interface with speed: 1000Mb/s duplex: Full
ping gives me a round-trip echo packet with ~ 0.139 ms
writes ~ 57,9 MB/s (dd test) reads ~ 59,7 MB/s (uncached), 3,9 GB/s (cached) (dd test)
How do those compare to the native disk speed on your NFS server (if it is a host where you can access the disks locally)? And does the dd speed improve it you use a very large block size?