On Sun, Jul 14, 2013 at 05:25:29PM +1000, Brett Pemberton wrote:
to extend or resize the volume, you've got to tell it which disk(s) to allocate the free space from.
Nope. You can, but you don't have to.
oh well, consider that an example of lvm's difficulty to learn and remember. I've been using LVM for a lot longer than ZFS but I still find it difficult and complicated to work with, and the tools are clumsy and awkward. nowadays, i see them as first generation pool & volume management tools, functional but inelegant. later generation tools like btrfs and ZFS not only add more features (like compression, de-duping, etc etc) by blurring the boundaries between block devices and file systems but more importantly they add simplicity and elegance that is missing from the first generation. and as for lvextend, lvreduce, and lvresize - it's completely insane for there to be three tools that do basically the same job. sure, i get that there are historical and compatibility reasons to keep lvextend and lvreduce around, but they should clearly be marked in the man page as "deprecated, use lvresize instead" (or even just "same as lvresize") because for a newcomer to LVM or even a long term but infrequent user (as is normal, lvm isn't exactly daily-usage) they just add confusion - i have to remind myself every time I use them that extend doesn't mean anything special in LVM, it's not something extra i have to do before or after a resize, it's just a resize. craig -- craig sanders <cas@taz.net.au> BOFH excuse #144: Too few computrons available.