I apologize if this is the wrong place to ask this. I looked at the
archives for both zfs-code and zfs-discuss, and this seemed like the
more appropriate list to post my query.
I recently read about ZFS and it seems to be a very cool thing. I've
been reading various webpages and looking through
> 1. zio.c has functions like "zio_rewrite" and
> "zio_rewrite_gang_members". ZFS is copy-on-write, so it should never
> be rewriting anything, right? Also, zio_write_compress makes a
> cryptic reference to spa_sync.
Right. The only time we rewrite an existing block is when the block
was allo
