nfs3_jukebox_delay(5)nfs3_jukebox_delay(5)NAMEnfs3_jukebox_delay - control the length of time the NFS version 3
client waits before re-transmitting a request after receiving a
NFS3ERR_JUKEBOX error
VALUES
Failsafe
Default
Allowed values
Recommended values
A warning will be issued at runtime if the tunable is set to a value
less then 100 hundredths of a second or greater than 60000 hundredths
of a second since this is outside the tested limits. This is not a
serious warning but just an information message for the administrator.
DESCRIPTION
controls the duration of time that the NFS version 3 client waits to
transmit a new request after receiving the error from a previous
request. The error, is generally returned from the server when the file
is temporarily unavailable for some reason. These situations are gener‐
ally associated with hierarchical storage and CD or tape jukeboxes.
Who Is Expected to Change This Tunable?
The distributed file system administrator should examine this value
depending on the speed of the storage on the NFS file server.
Restrictions on Changing
The tunable is dynamic; tuning will take effect immediately on the run‐
ning system.
When Should the Value of This Tunable Be Raised?
The value should be increased if there are long delays in making the
file available. This will reduce network overhead due to repeated
retransmissions.
What Are the Side Effects of Raising the Value?
Increasing the delay before retransmission will impact performance if
the file unavailability is shorter than the increased delay.
When Should the Value of This Tunable Be Lowered?
If the time the file is unavailable is small, then decreasing this
value should not impact performance.
What Are the Side Effects of Lowering the Value?
If the time the file is unavailable is large, then there will be an
increase in network overhead.
WARNINGS
All HP-UX kernel tunable parameters are release specific. This parame‐
ter may be removed or have its meaning changed in future releases of
HP-UX.
Installation of optional kernel software, from HP or other vendors, may
cause changes to tunable parameter values. After installation, some
tunable parameters may no longer be at the default or recommended val‐
ues. For information about the effects of installation on tunable val‐
ues, consult the documentation for the kernel software being installed.
For information about optional kernel software that was factory
installed on your system, see at
AUTHOR
was developed by Sun Microsystems, Inc.
SEE ALSOkctune(1M), sam(1M), gettune(2), settune(2), values(5).
Tunable Kernel Parameters nfs3_jukebox_delay(5)