Managing NFS and KRPC Kernel Configurations in HP-UX 11i v3 (762807-001, March 2014)

Restrictions on Changing
Default: 600 tenths of a second (1 minute)
Min: 10 tenths of a second (1 second)
Max: 36000 tenths of a second (1 hour)
Note: If the tunable is set to a value less than 10 tenths of a
second or greater than 36000 tenths of a second, an
informational warning is issued at runtime. These values are
outside the tested limits.
Restrictions on Changing
The nfs4_cots_timeo tunable is dynamic. System reboot is not required to activate changes made to
this tunable. Any change made to the value of the tunable is effective immediately. However, the
timeout duration is set per filesystem at mount time. The system administrator must unmount and re-
mount the filesystem after changing this tunable. Only NFSv4 mount points are affected by changing
the value of the nfs4_cots_timeo tunable.
Modifying the Value
If you are experiencing a large number of timeouts on connection-oriented NFSv4 filesystems,
increase the value of this tunable. However, a large number of connection-oriented timeouts can be
an indication of networking hardware and software problems.
2.1.36 nfs4_do_symlink_cache
Description
The nfs4_do_symlink_cache tunable caches the contents of symbolic links in NFSv4 mounted
filesystems. If the server changes the contents of a symbolic link, and if either the time stamps are not
updated or the granularity of the time stamp is too large, then the changes become visible to the client
after a long time interval.
The nfs2_do_symlink_cache tunable caches the contents of symbolic links in NFSv2 mounted
filesystems. The nfs3_do_symlink_cache tunable caches the contents of symbolic links in NFSv3
mounted filesystems. For more information on these tunables, see:
• nfs2_do_symlink_cache
• nfs3_do_symlink_cache
Tested Values
Default: 1 (Symbolic link cache is enabled)
Min: 0 (Symbolic link cache is disabled)
Max: 1
Restrictions on Changing
The nfs4_do_symlink_cache tunable is dynamic. System reboot is not required to activate changes
made to this tunable. Only NFSv4 mount points are affected by changing the value of the
nfs4_do_symlink_cache tunable.