Which Sphinx version are you? Let us help you pick.
2.2.2-beta (Feb 2014)
Now with complete JSON support, GROUP <N> BY extensions, HAVING clause, online ALTER, ATTACH into existing RT indexes, even more ranking signals, English and German moprhology, RLP Chinese segmenter support, and more!
Please note that some features might not be production stable.
If you managed to hit a bug in Sphinx Beta release please submit all the details to our Bug Tracker.
What is a Sphinx Beta? It's a release in which, to the best of our knowledge,
Core indexing and searching functionality does, of course, fall into the "existing features" category and should be rock solid at all times.
2.1.6-release (Feb 2014)
Generally recommended release.
Current stable release, with support for real-time indexes, string attributes, optimized index format, initial JSON attributes and many other features.
All the latest fixes are included, but if you’re looking for brand new features you may want to consider the beta release.
“Sphinx Stable Release” means that:
Ubuntu users: install our official Launchpad's repository to get the latest release every week (temporarily only 12.04 LTS packages are available) :
sudo add-apt-repository ppa:builds/sphinxsearch-beta
We're constantly fixing old things and adding new things, and open source means you can check what's on the bleeding edge at any time. Or dig into the project history. We keep a public read-only SVN repository mirror at Google Code for that.
Both beta and release versions from The Times Past.