[CentOS] ZFS on Linux in production?

On 10/25/2013 00:44, John R Pierce wrote:
> current version of OpenZFS no longer relies on 'version numbers',
> instead it has 'feature flags' for all post v28 features.

This must be the zpool v5000 thing I saw while researching my previous 
post.  Apparently ZFSonLinux is doing the same thing, or is perhaps also 
based on OpenZFS.