HP-UX 11i June 2003 Release Notes

New and Changed Disk and File Management Features
Other NFS Changes
Chapter 11
229
Other NFS Changes
new at 11i
original release
Three additional features have been added to NFS:
• Loopback transport support has been added to transport-independent RPC.
• Automatic user-space thread generation has been enabled in the RPC library.
• NFS server-side performance enhancements have been added.
Loopback Transport Support
Loopback transport provider devices (tlclts, tlcots, and tlcotsod) have been added
to the TI-RPC definition file, /etc/netconfig. Also, the system now has the following
new loopback transport-specific directories and files:
/etc/net/loopback_transport_name/hosts
/etc/net/loopback_transport_name/services
The following ONC/NFS daemons support loopback transport requests:
• /usr/sbin/rpcbind
• /usr/sbin/keyserv
• /usr/sbin/rpc.nisd
• /usr/sbin/nis_cachemgr
The netid and address fields in the rpcinfo call (which queries /usr/sbin/rpcbind to
determine what services have been registered) now give the loopback device name plus
an address name, rather than just the netbuf address provided by udp and tcp
transport.
Additionally, the ticlts loopback transport device has a randomly generated string
address.
User-Space Thread Generation
To process incoming RPC requests, the svc_run() function call in the RPC library
automatically generates a thread on behalf of the application. The threads are managed
by the RPC library software. RPC threads may be created when calling the RPC library.
NFS Server-Side Performance Enhancements
The NFS server daemon, /usr/sbin/nfsd, has been modified to enhance performance.
As a result, the user may see more nfsd daemon processes running than requested,
depending on the number requested and the number of processors configured. This
change is documented in the nfsd (1M) manpage.
The NFS client-side buffer cache management has been modified to improve server
performance from a VxFS file system mounted on the client.
The performance enhancements included have given HP industry leading NFS SPECsfs
benchmark values on our V-Class platforms.