Along the same lines - Are there plans for ClusterFS to support newer versions of the vanilla kernel? Current patches exist for 2.6.8 and 2.6.9. I ported them to 2.6.18 and got them to work. We'd like to move to 2.6.20 (or better) and have official Lustre patches for that version. Thanks, Timothy Snider Storage Architect Strategic Planning, Technology and Architecture LSI Logic Corporation 3718 North Rock Road Wichita, KS 67226 (316) 636-8736 [EMAIL PROTECTED]
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Andreas Dilger Sent: Tuesday, May 08, 2007 1:24 PM To: Nadolski, Ed Cc: [email protected] Subject: Re: [Lustre-discuss] Lustre on the OSS? On May 08, 2007 09:32 -0600, Nadolski, Ed wrote: > - Do the Lustre modules on the OSS all run entirely in kernel mode? Yes. > Is there anything in the IO path that invokes a user/kernel > transition, or perform any data block copying? For regular userspace IO there is always a copy between userspace and kernel. If you use TCP then there is another copy on receive (either on the client or server depending on whether you are reading or writing). > - Where do the Lustre modules hook into the back-end IO stack on the > OSS? (VFS/VOP? Block? SCSI? submit_bio()?) I'm interested in > optimizing the Linux IO stack but I don't want to collide with any > Lustre changes. The majority of filesystem operations are done at the VFS/VOP level. For bulk data IO (read/write) they use submit_bio() (see filter_io_26.c). > - Does Lustre on the OSS make use of the Linux page cache or direct IO? > Is any of that configurable? Not currently. > - What Linux kernel goes with Lustre 1.6? Depends which distro you are using. Cheers, Andreas -- Andreas Dilger Principal Software Engineer Cluster File Systems, Inc. _______________________________________________ Lustre-discuss mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-discuss _______________________________________________ Lustre-discuss mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-discuss
