Hi Andreas, On Fri, Dec 15, 2006 at 03:10:57PM -0700, Andreas Dilger wrote:
> > It's x86_64, so 4KB. I don't think scatter/gather descriptors come into > > play at this point since the 4MB write will be broken up into smaller > > writes by the MD layer. > > Hmm, though wouldn't the incoming request itself have to be put into an > bio in order to be submitted? There are patches in bug 9945 that Bull > has been testing in this area. I really don't know what goes on when using MD. It does seem logical that bios would be used at the input side of the MD device.. Alex, can you you comment on this? All I know is that 2 and 4 MB IOs work with a chunk size of 128 KB but not with a chunk size of 256 KB, and no error message is printed when it doesn't work. Cheers, Jody _______________________________________________ Lustre-devel mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-devel
