On Wed, Dec 13, 2017 at 04:18:06PM -0800, Randy Dunlap wrote: > Use ASCII characters ___ or ---, not whatever those bottom block characters are. Argh, sorry, I removed those for an internal review but forgot to remove them here. > > > + > > + The purpose of this unstriping is to provide better QoS in noisy > > + neighbor environments. When two partitions are created on the > > + aggregate drive without this unstriping, reads on one partition > > + can affect writes on another partition. This is because the partitions > > + are striped across the two cores. When we unstripe this hardware RAID 0 > > + and make partitions on each new exposed device the two partitions are now > > + physically separated. > > + > > + With the module we were able to segregate a fio script that has read and > > + write jobs that are independent of each other. Compared to when we run > > + the test on a combined drive with partitions, we were able to get a 92% > > + reduction in five-9ths read latency using this device mapper target. > > 5/9ths > although I can't quite parse that sentence. I'll reword it, thanks. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
