On Wed, Oct 07, 2009 at 12:41:27PM -0400, Rik van Riel wrote: > Ryo Tsuruta wrote: > > >If once dm-ioband is integrated into the LVM tools and bandwidth can > >be assigned per device by lvcreate, the use of dm-tools is no longer > >required for users. > > A lot of large data center users have a SAN, with volume management > handled SAN-side and dedicated LUNs for different applications or > groups of applications. > > Because of alignment issues, they typically use filesystems directly > on top of the LUNs, without partitions or LVM layers. We cannot rely > on LVM for these systems, because people prefer not to use that. > I am one of these people that does not use LVM, because I have no need to with the SAN. The SAN spreads the volume across many disks, I do not need to do it. LVM would add layers of complexity than I do not need. I do use currently use EVMS to allow me to expand volumes without rebooting. But, with the newer kernels I do not even need that since I can just expand the LUN and the the filesystem (I do not use partitions either). Why was device-mapper stuff moved into LVM2? IMHO it should have stayed separate. Andy -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
