ZFSguru is an operating system specially designed for reliable data storage. ZFSguru is based on FreeBSD, an advanced UNIX operating system.

allows volumes and/or their snapshots, to be replicated between physically separated servers in real time, or by point-in-time, over virtually unlimited distances

People are finding that setting 'zildisable' seems to increase their performance - especially NFS/ZFS performance. But what does setting 'zildisable' to 1 really do?