Today Apache Lucene and Solr PMC announced another version of Apache Lucene library and Apache Solr search server numbred 4.3.1. This is a minor bugfix release.
Solr
Switch Query Parser – quick look
The number of different query parsers in Solr was always an amusement for me. Can someone here say how many of them are currently available and say what are those? Anyway, in this entry we won’t be talking about all the query parsers available in Solr, but we will take a quick look at one of them – the SwitchQueryParser introduced in Solr 4.2.
Solr 4.2: Index structure reading API
With the release of Solr 4.2 we’ve got the possibility to use the HTTP protocol to get information about Solr index structure. Of course, if one wanted to do that prior to Solr 4.2 it could be achieved by fetching the schema.xml file, parsing it and then getting the needed information. However when Solr 4.2 was released we’ve got a dedicated API which can return the information we need without the need of parsing the whole schema.xml file.
Apache Lucene and Solr 4.3
Today Apache Lucene and Solr PMC announced another version of Apache Lucene library and Apache Solr search server numbred 4.3. This is a next release continuing the 4th version of both Apache Lucene and Apache Solr.
Solr 4.3: shard splitting quick look
With the release of Solr 4.3 we’ve got a long awaited feature – we can now split shards of collections that were already created and have data (in SolrCloud type deployment). In this entry we would like to try that feature and see how it works. So let’s do it.
Apache Lucene and Solr 4.2.1
Today Apache Lucene and Solr PMC announced another version of Apache Lucene library and Apache Solr search server numbred 4.2.1. This is a minor bugfix release.
Autocomplete on multivalued fields using faceting
In the previous blog post about auto complete on multi-valued field we discussed how highlighting can help us get the information we are interested in. We also promised that we will get back to the topic and we will show how to achieve a similar functionality with the use of Solr faceting capabilities. So, let’s do it.
Apache Lucene and Solr 4.2
Today Apache Lucene and Solr PMC announced another version of Apache Lucene library and Apache Solr search server numbred 4.2. This is a next release continuing the 4th version of both Apache Lucene and Apache Solr.
SolrCloud HOWTO
What is the most important change in 4.x version of Apache Solr? I think there are many of them but Solr Cloud is definitely something that changed a lot in Solr architecture. Until now, bigger installations suffered from single point of failure (SPOF) – there was only the one master server and when this server was going down, the whole cluster lose the ability to receive new data. Of course you could go for multiple masters, where a single master was responsible for indexing some part of the data, but still, there was a SPOF present in your deployment. Even if everything worked, due to commit interval and the fact that slave instances checked the presence of new data periodically, the solution was far from ideal – the new data in the cluster appeared minutes after commit.
Autocomplete on multivalued fields using highlighting
One of the recent topics I came across was auto complete feature based on Solr multi-valued fields (for example, this question was asked on Stack Overflow). Let’s look what possibilities we have.