
none /dev/sh m tmpfs default s 0  0
none /proc proc default s 0  0
none /sys sysfs defaul ts 0  0
/dev/Vol Grou p00/Lo gVol 01 swap swap defaults 0 
0
jupiter: /auto/ home /home nfs default s 0 
0
LOCAL:/ /tmnt hpssf s noa uto,cos =2 0 
0
LOCAL:/ho me/u ser1 /home /hpss /user 1 hpssf s noa uto,m axsegs z 0  0
remote -site:/h ome/u ser2 /ho me/re mote- hpss /user 2 hpssfs no auto,i p=eth0 0 
0
The last three entries are VFS Interface mount entries (indicated by the fi le system type “hpssfs”). The 
first two of these provide for the HPSS directories from the local HPSS site to be  mounted on to two 
local mount points. The last entry provides for a directory tree from a remote HPSS site to be  mounted on 
to a local mount point. See the man pages for the /etc/fstab file and the mount(8)  command for more 
information about setting up this file.
The above HPSS directory trees then can be mounted as follows:
# su -
# mount /tmnt
# mount /home/hpss/user1
# mount /home/remote-hpss/user2
4.
14.4.3.  Mount OptionsThe VFS Interface provides mount options to better meet specific usage scenarios. The  following table 
lists the mount options which can be specified either via the mount command (using the -o option) or 
via /etc/fstab.
Table 5. HPSS VFS Interface Mount Options
Mount Option  Mount Description
acregtimeo Seconds to cache file attributes.  The shorter this value, the more  frequently 
communication to HPSS is required.  Synchronization between separate vfs nodes 
or mount points may benefit for a shorter cache period with the expense of longer 
latencies. 
acdirtimeo Seconds to cache directory attributes.  The shorter this value, the more frequentl y 
communication to HPSS is required.  Synchronization between separate vfs nodes 
or mount points may benefit for a shorter cache period with the expense of longer 
latencies. 
stack Size of stack.  You should not have to change this. 
debug Doesn’t do anything at this point.  Possible future use.
acregtimeo Seconds to cache file attributes.  The shorter this value, the more frequently communication 
to HPSS is required.  Synchronization between separate vfs nodes or mount points may 
benefit for a shorter cache period with the expense of longer latencies.
HPSS Management Guide November 2009
Release 7.3 (Revision 1.0) 352