[Beowulf] Problem with ext3 filesystem?

Michael Will mwill at penguincomputing.com
Thu Feb 12 11:31:29 PST 2009

For large non-lustre filesystems of that size, we have been deploying 
XFS successfully for the last 3-4 years at least. We have a few
deployments using centos plus to get it onto a redhat based system
but generally have to chose Novell SLES to get a fully supported XFS

Cheers, Michael Will
On Thu, Feb 12, 2009 at 01:44:55PM -0500, Joe Landman wrote:
> Dan.Kidger at quadrics.com wrote:
>> And anyway - I thought the maximum size for ext3 was 8TB ?
> It is w/o the patches.  With patches it can get to 16TB.  I seem to  
> remember that the 16TB required an 8kB page size (e.g. Itanium2 kernel).
>> I know that there are patches to bring it up to 16TB, but does
>> anybody trust these and use them for production systems?
> I am sure a few people are using this.  We just don't advise/recommend  
> this file system at these sizes.
> Lustre uses a (significantly patched) ext3 right now to get beyond 8TB  
> per OSD.  Since they appear to be migrating over to zfs, and their  
> patches aren't in the kernel yet (will go back and recheck), this is  
> still a problem.
> Since we have customers/users with 40+ TB on single boxen we don't  
> normally recommend file systems that run close to their limits in daily  
> usage scenarios.  That and fsck ...  well ...
> Joe
> -- 
> Joseph Landman, Ph.D
> Founder and CEO
> Scalable Informatics LLC,
> email: landman at scalableinformatics.com
> web  : http://www.scalableinformatics.com
>        http://jackrabbit.scalableinformatics.com
> phone: +1 734 786 8423 x121
> fax  : +1 866 888 3112
> cell : +1 734 612 4615
> _______________________________________________
> Beowulf mailing list, Beowulf at beowulf.org
> To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf

More information about the Beowulf mailing list