NFSIOD(8) System Manager's Manual NFSIOD(8)

nfsiod — local NFS asynchronous I/O

nfsiod [-n num_threads]

nfsiod is deprecated. See nfs.conf(5) for NFS configuration info.

nfsiod controls the maximum number of asynchronous I/O threads used for NFS mounts. Historically, it has consisted of a daemon that never exits. However, asynchronous I/O requests are now serviced by threads launched on demand in the kernel and the nfsiod command simply sets the configuration limit.

Having asynchronous I/O threads improves performance but is not required for correct operation.

The options are as follows:

Specify maximum number of asynchronous I/O threads to be used.

If no maximum is specified, nfsiod displays the current value. The default value is 16. A client should allow enough threads to handle its maximum level of concurrency.

The nfsiod utility exits 0 on success, and >0 if an error occurs.

nfs.conf(5), mount_nfs(8), nfsstat(1)

The nfsiod utility first appeared in 4.4BSD. It's use was deprecated in Darwin 9.

October 25, 2006 macOS 15.2