A pretty subtle change happened in the transition from Lucene/Solr 3 to 4. The abstract method for CharFilterFactory changed from public CharStream create(CharStream input); to public abstract Reader create(Reader input); What ’s up with this change? Why did it happen? Well first, let’s take a step back and explain why CharStream existed. CharStream inherited from [...]
In our daily adventures on our computers and the Internet, we often find/create notes or documents that we would like to keep for later, that we attempt to organize. We put them in our email, in Google Docs, in Dropbox, in Gist, and countless other places. Then when we want to find them later, it’s [...]
I’m Jonathan Thompson, a rising 4th year CS major at UVA. This is my first blog post as an intern at OSC, I hope you enjoy it! While my teammate Krystal worked on integrating OSCAR, the OSC Automated Robot, with Solr, I forked the project and used it as an opportunity to demo Elasticsearch. Was [...]
National Day of Civic Hacking at OpenSource Connections What OSC is excited to join 86 other venues across the US for civic hacking and camaraderie. Come join us and find like minded folks to help you save the world. Better yet, lend your skills to someone else's great idea! When Saturday, June 1 from 9:00AM [...]
A new feature of Lucene 4 – pluggable codecs – allows for the modification of Lucene’s underlying storage engine. Working with codecs and examining their output yields fascinating insights into how exactly Lucene’s search works in its most fundamental form. The centerpiece of a Lucene codec is it’s postings format. Postings are a commonly thrown [...]
We’re cohosting a hackathon with FoundationDB on Friday. For those of you not in the know, FoundationDB is a pretty exciting addition to the NoSQL space. It brings flexible, arbitrary transactionality (including atomic cross-row joins in a distributed system) to NoSQL. My colleague Doug Turnbull got very excited about the technology a few months ago [...]
Much of the crew just got back from Lucene Revolution. It was an incredible experience to hang out with the cream-of-the-crop of the Lucene/Solr community. It continues to be clear that modern applications of all stripes are increasingly driven by search as the primary UI component. Users of these applications expect rich interactivity. And because [...]
On a recent engagement, we were posed with the problem of sorting through 6.5 million foreign patent documents and indexing them into Solr. This totaled about 1 TB of XML text data alone. The full corpus included an additional 5 TB of images to incorporate into the index; this blog post will only cover the [...]
