ElasticSearch 1.0, TokuMX 1.4, Plan 9 GPLv2’d and Python 3.4RC1 – Snippets


ElasticSearch 1.0 springs out: The search-oriented NoSQL database, built upon Lucene, ElasticSearch has hit version 1.0. It’s a big release with a lot of changes and a lot of new features – an API for selective snapshot/restore, federated search, aggregation, distributed percolation and software “circuit breakers” to stop some more dangerous actions from overwhelming the system. An interesting post from Found.no on ElasticSearch sums up the pros and cons (like no authentication or authorisation) places ElasticSearch in the domain of “secondary store” to be used alongside a primary database.

TokuMX 1.4: Tokutek’s “MongoDB-with-Toku-engine”, TokuMX, has hit version 1.4 and is addressing the performance of sharding and replication. Toku’s engine is reputed to be very good for particular use cases and it’s interesting to see alternative storage engines under the MongoDB infrastructure.

Plan 9 goes GPL2: It’s been a long time under a open source (but unblessed-by-the-FSF) licence, but the venerable and inspiring Plan 9 has not been relicensed (mostly) under the GPLv2. In an announcement. It can be downloaded from the Akaros project (or cloned from the GitHub repo) which seems to be breeding Inferno/Plan 9 with their own many-core large-smp research.

Python 3.4 on final approach: Out of beta and hitting release candidate a few days ago, Python 3.4 is now imminent. It’s expected to land just over a month from now on March 16. Check back to our coverage of the last beta for more details of what’s coming.

Apache Lucene and Solr go 4.5

solrThe text-search library Lucene and Solr, the search platform built on top of it, have both been updated to version 4.5. Version 4.4 came out in July so what’s changed in this version bump?

Well, first of all, for Lucene, the DocValues mechanism which allows typed storage to be associated with documents has been updated to allow for missing values and there’s now an in-memory supporting DocIDSet which is more efficient for carrying around smaller lists of documents. Other changes can be found in the Lucene 4.5 release notes.

Solr 4.5, as usual, benefits and supports these changes as it is built on Lucene, but the search platform has also had its own set of improvements. For example, when running a sharded cluster, its possible to now set up custom routing to the various shards, including routing based on field values. Faceted searches are now multi-threaded, the solr.xml configuration file is now storable in ZooKeeper and the CloudSolrServer has the ability to send updates directly to shard leaders. Again, more details are available in the Solr 4.5 release notes and the PDF of the updated Solr reference guide is available through the Apache mirrors. Both Lucene and Solr also have various bugfixes and performance improvements.