Hi,

the diskmon issue in RAC 11.2 was a firewall issue. The clusterware is running OK now and also the new ACFS (ASM Cluster filesystem) seems to work properly using a
shared ZFS volume.

Cheers, Marc
--- Begin Message ---
Hi,

I double checked the configuration with xm and the "w!" option seems to be configured :-( I also upgraded to build 123, but also no change in behaviour. Thus is this a RAC 11.2 problem or is there a general problem using zvols as as shared disks for xVM domains ?

   (device
       (vbd
           (protocol x86_64-abi)
           (uuid 048d282d-da4c-2e0b-b9f4-f3f4cc0811c7)
           (dev xvdc:disk)
           (uname phy:/dev/zvol/dsk/rpool/export/xvm/asm1)
           (mode 'w!')
           (backend 0)
           (bootable 0)
           (VDI )
       )
   )
   (device
       (vbd
           (protocol x86_64-abi)
           (uuid 078a81f8-76f3-cb82-ab43-91169ff7d4b7)
           (dev xvdd:disk)
           (uname phy:/dev/zvol/dsk/rpool/export/xvm/asm2)
           (mode 'w!')
           (backend 0)
           (bootable 0)
           (VDI )
       )
   )

--- Begin Message ---
Hi,

I just tried to setup a fresh Oracle RAC 11.2. For this reason I created two paravirtualized guests running Oracle unbreakeable Linux 5.3 64 bit. Each guest owns a private disk (zvol)
and is connected to two shared disks (also zvols):

   <disk type='block' device='disk'>
     <driver name='phy'/>
     <source dev='/dev/zvol/dsk/rpool/export/xvm/asm1'/>
     <target dev='xvdc' bus='xen'/>
    * <shareable/>*
   </disk>
   <disk type='block' device='disk'>
     <driver name='phy'/>
     <source dev='/dev/zvol/dsk/rpool/export/xvm/asm2'/>
     <target dev='xvdd' bus='xen'/>
     *<shareable/>*
   </disk>

However the shareable tag seems to be ignored. When the second node tries to join the cluster the CRS diskmon returns a timeout. I think this is because the first node locks the shared disk exclusively. In other XEN environments the tag "w!" is used to enable shared access to a disk. As I did not find any hint in terms of this issue in xVM I assumed "shareable" could be the solution, but obviously it isn't. So how to solve this issue ind xVM on Opensolaris ? Is there an easy xVM internal solution or
do I need to use iSCSI ?

Many thanks, Marc




--- End Message ---
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