I have recently been introduced to UNRAID, and find some of its ideas interesting. This caused me to wonder what Hammer had to offer, and if some of UNRAID's ideas could be reproduced in DragonFly. The Hammer docs are imposing to say the least, but after having skimmed over a few, it brought some questions to mind:
1/ If I create a multi-volume filesystem, is it possible (after the death of hardware, for instance) to mount a single volume from the group on another machine and retrieve the contents, or does the whole filesystem need to be mounted together? Is there a utility to find filesystems spanning multiple volumes?
2/ In case of a disk failure in a multi-volume filesystem, what is the procedure for recovery? I'm guessing any PFS would not be restricted to a disk, but would potentially span multiples, so you would have to have a 'top-level' PFS mirror covering the whole filesystem? Or have I missed something obvious?