[Xen-users] Shared SAN disk LUN between 2 servers and migration problem

[Pekka.Panula@xxxxxxxx]

HI

Dom0 is CentOS 5.2, 64-bit, Xen version
3.2.1 and 3.2.2.

I got Fiber SAN disk system and 2 servers
and i am making shared LUN available to both servers. Then i got multipath
layer running on both Dom0s and so Xen is seeing device-mapper file, instead
of two /dev/sdX devices, then i have setup Xen domU (HVM Windows 2003)
using /dev/mapper/sharedLUN as physical storage to my windows server. 

Do i need one more layer to setup migration
working? It seems now that if i migrate between servers i get filesystem
corruptions.

Perhaps some sort of cache on Linux
that it not written to disk system yet is causing this and when server
is migrated device state is not same on target servers multipath device,
eg. some part of write operation is not written to shared lun device so
target Xen dont have complete state.

Whats the best way so cache problem
do not occur, eg. both multipath devices has same state on both servers,
i am not wanting to duplicate data and use anything separate cluster file
system,  so is there some sort of system how to get this problem fixed?

Terveisin/Regards,
   Pekka Panula, Net Servant Oy
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users