[Linux-cluster] gfs - filesystem size for 64-bit Linux

[Kevin Anderson]

On Tue, 2004-10-19 at 17:38, Anne Hammond wrote:
> The Red Hat documentation for gfs 6.0, page 12, lists the
> requirements for storage devices, with a 2 TB TOTAL gfs space
> (see below).
> 
> We want to run 2 AMD64 servers with Red Hat Linux with a total
> of 10 TB data space.
> 
> Can we only mount 1 2 TB gfs filesystem? Or can there be several
> gfs "filesystems", each with whatever that version of Linux supports
> as the max filesystem size? (16TB under 2.6)

Maximum size of each GFS filesystem for RHEL3 (2.4.x kernel) is 2 TB,
you can have multiple filesystems of that level.  So, to get access to
10TB of data requires a minimum of 5 separate filesystems/storage
combinations.

The theoretical 2.6 kernel limit is 16TB for 32bit platforms, and
>Exabyte for 64bit platforms.  There has been some talk on irc and the
mailing list about people trying those configurations but I have not
heard of any results as of yet. 

> 
> Is anyone out there using > 2 TB gfs on a 64bit system?
> 

To go greater than 2TB requires a 2.6.x kernel.  The 2.4 based kernel
limit is 2 TB regardless of hardware architecture.
 
Kevin