Hi,
TCP/IP Engineering is aware of the problem.
A workaround given by them is to use
the directory and name caches :
With ovms_xqp_plus_enabled = 0
# ls - hangs
With ovms_xqp_plus_enabled = 7
# ls - DOES NOT hang - works as expected
To show ovms_xqp_plus_enabled:
$ tcpip sysconfig -q nfs ovms_xqp_plus_enabled
nfs:
ovms_xqp_plus_enabled = 0
And to set ovms_xqp_plus_enabled:
$ tcpip sysconfig -r nfs ovms_xqp_plus_enabled=7
ovms_xqp_plus_enabled: reconfigured
$ tcpip sysconfig -q nfs ovms_xqp_plus_enabled
nfs:
ovms_xqp_plus_enabled = 7
For more information on the File Name Cache
see :
http://h71000.www7.hp.com/doc/732final/6526/6526pro_047.html#troub_nfs_fileexcerpt :
In addition, you can also use the NFS sysconfig attribute ovms_xqp_plus_enabled to modify the behavior of the NFS server to take advantage of the directory and name caches. This attribute is specified as a bit mask. The default value is 0, or OFF.
The following list describes the mask values:
1 (open directory on LOOKUP)
When an NFS LOOKUP operation is performed on a directory, the directory is accessed. This allows subsequent operations to use the directory cache. If the name cache is enabled, entries will be posted to it.
2 (open directory on READDIR)
When an NFS READDIR operation is received, the directory is accessed. This allows subsequent operations to use the directory cache.
4 (open file on GETATTR)
When the attributes of a file subject to record format conversion are read and the MODUS_OPERANDI mask 512 is enabled, the file's true size (that is, its converted size) is to be returned. If this option is enabled, then the access to convert the file will be cached for up to the number of seconds specified by the subsystem attribute vnode_age . If the ODS name cache is also enabled, the size and conversion information will be retained in the ODS cache until either the file is deleted or the entry is replaced by another, subject to the LRU behavior.
Obtain a combination of choices by adding the desired values. For example, enter 7 for a combination of the three.
When directory caching is enabled, the system must be configured to be able to handle the increased directory cache requirements. The following SYSGEN parameters may need to be increased, depending on the maximum number of files that the NFS server may access at any given time. This maximum is determined by the FILLM quota of the NFS$SERVER account and the SYSGEN parameter CHANNELCNT .
Hth,
/HF
