Accessing disks locally on a server gives read speeds around 100MB/s, write speeds around 267MB/s. Mounting the same disks on the same server via NFS (ie, not using the network at all) gives read speeds around 30MB/s, write speeds around 80MB/s. That's about 30% of the local access speed. Is that to be expected? I'd expect a 10-15% slowdown, but not this much. This is using NFSv4; using NFSv3 improves the speeds slightly (36MB/s read, 95MB/s write). Other parameters we've changed, none of which have a significant impact: - UDP/TCP - rsize and wsize - noatime - noacl - nocto If that's an unexpected slow down, where should we be looking? Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
