The requirements are listed in the INSTALL file. There are piles of differences between the new C version and the old perl version, including a different config file syntax to let you more easily batch common input sets through the same set of matches. I'll publish a complete feature list when I get around to it, which isn't right now.

The tarball comes with a sample grok.conf that shows you a a few different things you can do with the new version.

To run it, once you've built it, you must have a 'grok.conf' in the same directory from which you are running the 'grok' binary.

Please send any questions you have to grok-users@googlegroups.com.

Download: grok-beta-20081228.tar.gz