ONCplus B.11.31.15 Release Notes (5992-5685, September 2012)

NOTE: Client failover support is limited to read-only mounts or static filesystems that are not
modified often.
• Enhanced NFS logging
NFS server logging enables an NFS server to provide a record of file operations that are
performed on its filesystems.
New AutoFS Features in ONCplus B.11.31_LR
AutoFS supports the following features:
• On-Demand Mounting of Hierarchical Filesystems
In earlier versions, AutoFS mounted an entire set of filesystems if they were hierarchically
related. However, in HP-UX 11i v3, AutoFS mounts only those filesystems that users access.
Other filesystems that are hierarchically related to these filesystems are mounted only when
they are requested. Hierarchical filesystem mounting prevents unnecessary mounting and
unmounting, and improves performance.
• Browsability
AutoFS enables a user to browse the potential mount-points for indirect maps without actually
mounting each filesystem.
• Concurrent mount or unmount
AutoFS performs concurrent mounts and unmounts using the multithreaded automountd
daemon. Concurrent mounting or unmounting prevents services from hanging if a server is
unavailable.
• Reliable NFS ping
AutoFS supports a -retry=n mount option for an NFS map entry to configure the ping
timeout value. The default timeout value is 10 seconds. The ping command can impose a
load on the network if used during normal operations or from automated scripts.
• NFS loopback mount
By default, AutoFS uses the Local File Systems (LOFS) mounts for locally mounted filesystems.
AutoFS provides an option to allow loopback NFS mounts for the local mount. Use this option
in high availability NFS environments.
• Client-side Failover Support
If the current server goes down, AutoFS enables a mounted NFS read-only filesystem to
transparently switch over to an alternate server.
• Backend Support
AutoFS supports the storage and distribution of AutoFS maps in the following:
◦ Files
◦ Network Information Service (NIS)
◦ Lightweight Data Access Protocol (LDAP)
• Filesystem Support
AutoFS supports the automatic mounting and unmounting of the following filesystems:
◦ NFS (All versions including NFSv4)
◦ CacheFS
30 Features Introduced in previous versions of ONCplus