On Oct 06, 2007 10:28 -0400, Aaron Knister wrote: > Oh, right I forgot about that. Well...if i had an 8tb lun and split > it into 2 volume groups using LVM do you think the performance would > be worse than making 2 raids at the hardware level?
Well, it won't be doing the disks any favours, since you'll now have contention between the OSTs, and the kernel will be doing a poor job with the IO elevator decisions. I would suggest making 2 smaller RAID LUNs instead. In the end it is up to you to decide if the IO performance is acceptable. You can do some testing using lustre-iokit to see what the component device performance is. > On Oct 5, 2007, at 6:18 PM, Andreas Dilger wrote: > > >On Oct 05, 2007 13:14 -0400, Aaron Knister wrote: > >>Make that 6x 9.7TB luns. > > > >Lustre (== ext3) doesn't support >= 8TB LUNs. > 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
