> So, along comes btrfs that mimics the feature-set of ZFS but brings along many advantages (much thanks to it being developed much later). Just like SystemTap

> So, along comes btrfs that mimics the feature-set of ZFS but brings along many advantages (much thanks to it being developed much later). Just like SystemTap mimics the feature set of DTrace and brings along many advantages due to its later development: http://dtrace.org/blogs/ahl/2007/08/02/dtrace-knockoffs/ http://dtrace.org/blogs/ahl/2007/08/02/dtrace-knockoffs/