Please don't reply to lustre-devel. Instead, comment in Bugzilla by using the following link: https://bugzilla.lustre.org/show_bug.cgi?id=10744
Created an attachment (id=9365) Please don't reply to lustre-devel. Instead, comment in Bugzilla by using the following link: --> (https://bugzilla.lustre.org/attachment.cgi?id=9365&action=view) survey of various software RAID 0 methods Here is a survey of various software RAID 0 methods. Since current versions of Lustre typically perform 1 MB IOs, I only plotted (and in most cases only surveyed) this size. As you can see, the results show modest improvements for reads with high region counts, but not much improvement for lower counts. There's not much performance difference between LVM (DM) or MD RAID - LVM is faster with low region counts but not by much. Performance is also largely insensitive to chunk size. Unfortunately, writes are a different story. Both subsystems show consistently worse write performance, even lower than with only one LUN. Again, larger chunk sizes don't improve things much. I will discuss this issue with our IO specialists and see if there is a way to improve write performance. _______________________________________________ Lustre-devel mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-devel
