TensComplement

1. summary TensComplement and MacZFS
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The other ZFS on OSX

Don Brady, former Senior Software engineer at Apple, has started a company http://tenscomplement.com/ to provide a commercially supported version of ZFS for OSX including a GUI. Don is one of two intrepid originators of the port of ZFS to Mac OS, starting as a skunkworks project within Apple. His work is the spiritual successor of the MacZFS project, without which, we may not be here.

The company recently made its external release in March, 2011, as a limited public beta. Currently this implementation is sync'd to ZFS pool version 28 directly from Illumos, which is significantly further ahead than the MacZFS port's zpool version 8. In addition, Don knows the architecture and implementation of behind-the-scenes OSX specifics which means that it will likely be a much better port ultimately than MacZFS. Here are more comparative details.

Ten's Complement describes itself as "an open source company" and is working closely with the Illumos community, while they decide how to handle the specific licensing terms of their impending code release.

All that is publicly known to date is the fact that the CDDL requires the release and copyright assignment of any derivative work (patches to the upstream ZFS code), for example as Apple had already done.

The MacZFS community very excitedly awaits news of their further plans, and offers to help them in any possible way.

Ars Technica article about them, interviewing Don, and mentioning MacZFS at the end.