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/etc/nfsd [ -u nuservers ] [ -t ntservers ]
/etc/biod [ nservers ]
nfsd starts the NFS server daemons that handle client filesystem requests. The nfsd daemon serves as a user application entry point into the kernel-based NFS server. Depending on the option or options used, server daemons are started to handle only those NFS requests sent over UDP, only those NFS requests sent over TCP, or some daemons are started to handle UDP requests and some are started to handle TCP requests. Nuservers and ntservers are the number of server daemons to start. This number should be based on the load expected on this server.
biod runs on an NFS client and starts nservers asynchronous block I/O daemons, which do read-ahead and write-behind of blocks from the client's buffer cache. Its primary function is to increase the performance of block I/O operations on remote filesystems.