Hi, With 3T disks coming out soon, can anyone tell me what is involved with creating an OST that is bigger than 16T (on the 1.8.x branch)? Will Lustre support 32T or 64T LUNs any time soon? Thanks. Roger Spellman Staff Engineer Terascala, Inc. 508-588-1501 www.terascala.com <http://www.terascala.com/> -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.lustre.org/pipermail/lustre-discuss/attachments/20100621/b3bed6d2/attachment.html
> Hi, With 3T disks coming out soon, can anyone tell me what is > involved with creating an OST that is bigger than 16T (on the > 1.8.x branch)?It is very easy: please submit patches for extending the 1.8.x branch to use ZFS or XFS or JFS as the underlying storage layer.> Will Lustre support 32T or 64T LUNs any time soon?It already does, but only with one or more 8TiB/16TiB filesystem inside them. Part of the issue here is that large (> 4TiB) filesystem management is largely an unsolved research problem, and while some salesmen claim they can routinely do much larger single (as opposed to chunked like Lustre) filesystems, they are the same type of salemen who were selling derivatives until recently (they are fantastic, as long as everything goes all right). Of course as many "contributors" to this list show, there are those persuaded that they know better, and feel lucky. Good luck to their customers and/or employers.
On 2010-06-21, at 12:47, Roger Spellman wrote:> With 3T disks coming out soon, can anyone tell me what is involved with creating an OST that is bigger than 16T (on the 1.8.x branch)?The first step is to get the latest e2fsprogs from Git, which has alpha support for > 2^32 block filesystems, then port the lustre patches to same. If you specify the "force_over_16tb" mount option to ext4-based ldiskfs, then you can begin TESTING the support for > 16TB OSTs. We haven''t yet begun testing this ourselves, so feedback is welcome.> Will Lustre support 32T or 64T LUNs any time soon?That''s hard to say, but starting testing on it will definitely speed up the process. Cheers, Andreas -- Andreas Dilger Lustre Technical Lead Oracle Corporation Canada Inc.