From the news:
The Apache Nutch PMC are extremely pleased to announce the release of Apache Nutch v1.6. This release includes over 20 bug fixes, the same in improvements, as well as new functionalities including a new HostNormalizer, the ability to dynamically set fetchInterval by MIME-type and functional enhancements to the Indexer API inluding the normalization of URL’s and the deletion of robots noIndex documents. Other notable improvements include the upgrade of key dependencies to Tika 1.2 and Automaton 1.11-8. Please see the list of changes or the release report made in this version for a full breakdown. The release is available here.
See the Nutch 1.x tutorial.
From the news:
The Apache Nutch PMC are very pleased to announce the release of Apache Nutch v2.1. This release continues to provide Nutch users with a simplified Nutch distribution building on the 2.x development drive which is growing in popularity amongst the community. As well as addressing ~20 bugs this release also offers improved properties for better Solr configuration, upgrades to various Gora dependencies and the introduction of the option to build indexes in elastic search. Please see the list of changes made in this version for a full breakdown. The release is available here.
See the Nutch 2.x tutorial.
I haven’t done a detailed comparison but roughly, Nutch 1.x relies upon Solr for storage and Nutch 2.x relies upon Gora and HBase.
Surprised that isn’t in the FAQ.
Perhaps I will investigate further and offer a short summary of the differences.