HP CIFS Client A.02.02 Administrator's Guide

Configuration File
Configuration Parameters
Chapter 7112
nfsTimeout This integer variable defines the initial timeout in 1/10
seconds that is used by the kernel when it requests
data from HP CIFS Client. This value is doubled on
each retry. Together with nfsRetransmit, this defines
the absolute timeout for NFS requests. A value of 50 (5
seconds) avoids frequent retries of already running
(slow) requests and ensures a total timeout of about 2
minutes. This should be sufficient even for the slowest
devices and links. If you use a jukebox, it may also be
necessary to increase requestTimeout.
nfsRetransmit This integer variable defines the number of retries the
kernel attempts when HP CIFS Client does not reply in
time. The timeout starts with nfsTimeout and is
doubled on each retry. Retransmissions should not be
necessary, because HP CIFS Client should not lose any
requests. However, if your system's NFS client puts
high loads on NFS servers and has small maximum
socket buffer sizes, requests can get lost due to buffer
overflows. A value of 5 (which is also the default)
should be a good choice. You may want to experiment
with nfsTimeout to get the optimum performance even
with frequent buffer overflows.
nfsSockRxBuf
This integer variable sets the receive buffer size of the
socket used to communicate with the kernel. If the
value given is out of the acceptable range for your
machine, the HP CIFS Client automatically limits the
range. Increase the buffer size if you have extremely
slow writes.
nfsSockTxBuf This integer variable sets the transmit buffer size of
the socket used to communicate with the kernel. It is
not be necessary to set an explicit buffer size.
nfsTransferSize This integer variable defines the maximum block size
used in data transfer between the kernel and HP CIFS
Client. The maximum allowed value is 8k (8192). It
may be necessary to reduce the value if the NFS socket
has frequent overflows, as it may be the case with AIX
3.x. It is useful to use only powers of 2 as block sizes.
The default is 8192.