Hi.
We run z10, z/VM 5.4 and SLES10 SP1.

Problem: we need a 'moveable' NFS-server.

Current idea: two identical SLES10 that have a NFS server configured
and have access to a dasd disk owned by a non-linux vmuserid.
each server can link to the disk and starts network+nfsserver or detach
disk and stop network+nfsserver, both servers have the same IPaddress.

We have vmsecure and all in place to control that only one Linux server at
a time can do LINK vmuser00 300 300 W. (they are in different vm 
systems/computerhalls)

The idea is to have the linux server 'coming first' to LINK the disc in Write 
mode
and start the network with ipaddress1 and start the NFS-server, exporting that 
disk.

The other linux server that could not LINK to the disk in write mode, just sit 
there
doing nothing, including does not start the network(or stops it)

What I want is to send a signal from the online server to the 'offline' server
to take over the disk, unmounts, offline and detach first.

Or even better have some smart communication via IUCV so the server can 
cooperate
and decide who will take over the disk.

Can I use CP SEND something...  and trigger it in SLES10 ?
Or any other response to this ?

Maybe we can have some smart solution for common IUCV communication in place 
for SP2 ?

___________________________________________
Tore Agblad
Volvo Information Technology
Infrastructure Mainframe Design & Development, Linux servers
Dept 4352  DA1S 
SE-405 08, Gothenburg  Sweden

Telephone: +46-31-3233569
E-mail: [email protected]

http://www.volvo.com/volvoit/global/en-gb/

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