>> a big difference between the decisions is in data integrety.
>> it's much easier to break a fs that rewrites than it is a
>> worm-based fs.
>
> True. But there's a grey area here: an FS that *never* rewrites
> live blocks, but can reclaim dead ones. That's essentially
> what ZFS does.
unfortunately, i would think that can result in data loss since
i can can no longer take a set of copies of the fs {fs_0, ... fs_n}
and create a new copy with all the data possibly recovered
by picking a set "good" blocks from the fs_i, since i can make
a block dead by removing the file using it and i can make it
live again by writing a new file.
perhaps i've misinterpreted what you are saying?
> What's your personal experience on aoe vs. iscsi?
i have no iscsi experience.
aoe has been pretty fun to work with. the spec can
be read in half an hour. (it's maybe ten pages.) i
implemented a virtual aoe target for plan 9, vblade,
from scratch on a friday evening.
- erik
