Hey Bob, > My own conclusions (supported by Adam Leventhal's excellent paper) are that > > - maximum device size should be constrained based on its time to > resilver. > > - devices are growing too large and it is about time to transition to > the next smaller physical size.
I don't disagree with those conclusions necessarily, but the HDD vendors have significant momentum built up in their efforts to improve density -- that's not going to change in the next 5 years. If indeed transitioned to reducing physical size while improving density, that would imply that there would be many more end-points to deal with, bigger switches, etc. All reasonable, but there are some significant implications. > It is unreasonable to spend more than 24 hours to resilver a single drive. Why? > It is unreasonable to spend very much time at all on resilvering (using > current rotating media) since the resilvering process kills performance. Maybe, but then it depends on how much you rely on your disks for performance. Adam -- Adam Leventhal, Fishworks http://blogs.sun.com/ahl _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
