The situation is:
- I am running VMware ESX 3.5 (3 ESX Hosts w/ vCenter Server in a Cluster);
- I need five Virtual Machines to read from the same disk running a clustered file system;
- I cannot replicate data for each Virtual Machine due to capacity; and
- I need to avoid a single point of failure (sharing from a VM is not a viable option);
In a traditional system I would point two servers at the same LUN and used a clustered file-system and this is what I'm looking for an equivalent of inside of a virtualised environment.
I have a SAN and can use Raw Disk Mappings (RDM) from a VM to map to a LUN however there is LUN limit on the SAN and I am unable to establish a LUN for each Virtual Machine.
Is there a clever way around this or am I snookered?
I'm looking to run a clustered application and need to share file content and configuration between two Virtual Machines, about 50gb. This was previously done using a shared LUN on a SAN. I require both load balancing and HA of the machines. I do not have the capacity to replicate the data on each VM and the application cannot tolerate any sync-lag.
Essentially I "just" need a way to point each VM at a single LUN and allow the VM to then control that disk.
Licensed features include HA/DRS