On 2009-12-05, at 16:13, Richard Lefebvre wrote: > Would it be safe to create a file on a lustre file system and use it > as > a loop device for mounting? > > Sort of doing something like this (creates a 100G file): > > mount -t lustre msdser...@o2ib0:/lustre /mnt/lustre > dd if=/dev/zero of=/mnt/lustre/myfsfile bs=1024 count=104857600 > mkfs.ext3 /mnt/lustre/myfsfile > mkdir /mnt/myfs > mount -o loop /mnt/lustre/myfsfile /mnt/myfs
You mean like sanity.sh test 54c does? Yes. However, I'm not totally sure that ext3 on top of a loop device is "safe", regardless of whether this is Lustre or not. Some users do this (with ext2) to have a node-local mechanism for accessing a lot of small files. It is also possible to use such loopback files in read-only mode (again with ext2 only) from many nodes at one time. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
