[Xen-users] Searching for a Filesystem / Storage Solution

[Kyrios <kyrios@xxxxxxxxx>]

Hi list :)

I'm currently planning to setup the following environment:

4 - 16 physical nodes (starting with 4)
Each Node is a x86 Machine with 160GB Diskspace.
Each Node should run about 10 Virtual Machines.
Each Virtual Machine needs about 2GB Filesystem.
Live Migration should be used for maintenance times and to redistribute the VMs depending on the load they generate.

Live Migration needs SAN Storage. Since SAN Storage is expensive I'd like to avoid buying a dedicated solution.
This is why I'm searching for a fault tolerant solution using the hardware already available.

I already read articles about:
* LVS
* GFS
* DRBD
* GlusterFS
* GNBD

But now I'm totally confused.

Has anyone any good article or Howto on this issue?

What I'm looking for is a virtual Filesystem over all the nodes which can handle if one node goes down.

Current ideas are something like: Create Block Devices with DRBD using 2 nodes each. Create a stripe over all available DRBDs using LVM and export the Logical Volumes to the DomUs. The problem with that is that I'm "losing" half of the storage (mirroring) - which would be okay - and worse that I would have a single point of failure (The server which is exporting the Logical Volumes).

Would Xen work with some kind of cluster Filesystem?

I'm really totaly confused.

Best Regards
Thorsten

-- 
... black holes are where god divided by zero.
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