Re: Global Filesystem Limits

["Benjamin J. Weiss" <benjamin birdvet org>]

Markus Miller wrote:

> Hi,
>
> we are going to buy a new database cluster. The two servers will be connected to a Dell CX700 (EMC Clarion) with about 4 TB of available storage. We want to uses Red Hat Global File System to avoid using RAW device. 
>
> Reviewing the GFS Admin Guide on page 12 it says:
> ---snip---
> 2 TB maximum, for total of all storage connected to a GFS cluster. Linux 2.4 kernels do not support devices larger than 2 TB; therefore the total size of storage available to GFS cannot exceed 2 TB.
> ---snip---
>
> I did some research in Internet and definitely the Kernel 2.4 does not sopport devices larger than 2 TB. This makes me think that each LUN presented to the server must be smaller than 2 TB and I would suppose that I could create various GFS with sizes smaller than 2 TB. Is that correct, or does the capacity of the storage itself has to be smaller than 2 TB to be used by GFS?
>
>  
Why not wait for a couple of weeks?  RHEL 4 is in beta, and it uses the 
2.6 kernel.  I don't know what it's max device size is, but I know that 
it's bigger than 2TB.

Ben