Updates to this story
After twenty years, he writes from his bog, he's "decided to try something new". He says he's had a fantastic time at both Sun and Oracle and hopes that "Solaris and ZFS Storage are wildly successful," while wishing his best to the community to make it happen.
Bonwick's a top storage guy who pioneered and has been pivotal in ZFS, detailing developments to the community on his blog. While there is no animosity revealed in his announcement it could raise eyebrows on Oracle's commitment to Solaris - what commitment? - as he takes his leave.
Along with the exodus of other top Sun engineers since Oracle took the reigns.
He hints in his goodbye notice that he's working on the Next Big Thing - whatever that is. Bonwick doesn't seem to be sure himself but thinks it's worth a pop.
His last day at Oracle will be on Thursday, September 30, 2010.