Wera Linux Configuration - NFS

The WERA real time processor (CL7, vxWorks) uses NFS protocol to store the measured data to the Linux machine. To enable NFS access for the CL7 to the Linux machine, add the following lines to /etc/exports:

/home/wera/data 192.168.0.1(rw) /home/wera/vxworks 192.168.0.1(rw) /home/wera/etc 192.168.0.1(rw) /home/wera/weralogs 192.168.0.1(rw)

In /etc/sysconfig/nfs edit USE_KERNEL_NFSD_NUMBER from 4 to 8:

# the kernel nfs-server supports multiple server threads # USE_KERNEL_NFSD_NUMBER="8"

The NFS server can be started from the Run_level Editor (SuSE 8.1 Professional).
Activate NFS for Run_levels 2,3,5

You should not use Reiser FS for the NFS monted directories, as a significant increase in data transfer times
from the CL7 to the Linux host will be observed (a factor greater than 10!). The extended file system XFS is a good choice.

To initialize the data disk(s) with XFS, log in as root and enter the following commands:

If the data disk(s) are already mounted, enter
$ umount /data
Then generate the XFS file system (on e.g. /dev/sdb1) by entering
$ mkfs -t xfs -l size=32768b -f /dev/sdb1

Now you can mount the device /dev/sdb1 to /data:

$ mount -t xfs -o logbufs=8,logbsize=32768 /dev/sdb1 /data

Mounting the device(s) can be performed at boot time by e.g. using SUSE YAST2. YAST2 enters the necessary commands to /etc/fstab. It is important, that the mount options show above are included in the mount command in /etc/fstab.

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Comments to: gurgel@ifm.uni-hamburg.de (Klaus-Werner Gurgel)