Solr Feature Comparison
General Solr Features
- Based on Apache Lucene Search Library
- Complete query capabilities, such as keyword, Boolean and +/- queries. Also supports proximity searches, wildcards, fielded searches, term/field/document weights, find-similar, spell-checking, auto-suggest, multi-lingual and more.
- Sort by relevancy, date, or any field. Strong out-of-the box relevancy ranking means little custom tweaking except in extreme cases.
- Query term highlighting in result sets.
- Faceting of results and control over number and types of facets displayed.
- Scalable, with low overhead indexes, rapid incremental indexing, and distributed search. Index replication reduces system downtime.
- HTML-based administration interface (LW builds on this, however).
- Open interfaces based on standards such as XML, JSON, CSV and HTTP to load data and get results.
Other features have been added over successive releases.
System Configuration and Setup | ||||
| Feature | Solr 1.4.1 | Solr 3.6 | Solr 4.0 | |
| Wizard-based installation | ||||
| Built-in version-to-version migration tools | ||||
| ReST API for configuration | ||||
Connectors | ||||
| Feature | Solr 1.4.1 | Solr 3.6 | Solr 4.0 | |
| Websites | ||||
| SolrXML | ||||
| Local filesystems | ||||
| SMB (Windows Shares) | ||||
| HDFS, S3 | ||||
| JDBC | ||||
| SharePoint | ||||
| Load CSV | ||||
| Post JSON | ||||
| Create custom connectors | ||||
Indexing Content | ||||
| Feature | Solr 1.4.1 | Solr 3.6 | Solr 4.0 | |
| UI for configuration of data sources | ||||
| UI dashboard for monitoring crawl and index processes | ||||
| Scheduling content indexing | ||||
| Transform XML Solr docs via XSLT for indexing | ||||
| Various fixes for multi-threaded DIH | ||||
| Near-Realtime | ||||
| New Lucene index format | ||||
| Batch crawling | ||||
| Embedded Luke to analyze indexes | ||||
Index Management | ||||
| Feature | Solr 1.4.1 | Solr 3.6 | Solr 4.0 | |
| UI for adding and updating fields |  |  |  | |
| TermsComponent for access to indexed terms |  | |||
| Lockless Writes (DocumentWriterPerThread) |  |  | ||
| Automaton based auto-complete/suggest |  | |||
| Data-specific indexing codecs |  |  | ||
| Per-field similarity definition |  |  | ||
Query Handling | ||||
| Feature | Solr 1.4.1 | Solr 3.6 | Solr 4.0 | |
| eDismax query parser |  | |||
| Spell Check |  | |||
| Unary operators (+,-,!) will not be operators if followed by whitespace |  |  | ||
| Mixed range operators (such as { and ] ) are legal |  |  | ||
| Open-ended ranges (such as [a TO *]) |  |  | ||
| KStemmer |  | |||
| Spellcheck without separate index |  |  | ||
| Locale-sensitive range queries |  |  | ||
| Realtime Get to retrieve the latest version of a document without a commit |  |  | ||
| Hunspell Stemmer |  | |||
| Language Identification |  | |||
| Psuedo-Joins to select a set of documents based on their relationship to a second set of documents |  |  | ||
Results and Relevance | ||||
| Feature | Solr 1.4.1 | Solr 3.6 | Solr 4.0 | |
| Spatial search, filtering, boosting, sorting |  | |||
| Grouping (Field Collapsing) |  | |||
| User alerts for new content |  |  |  | |
| Suggester (Auto-complete) |  | |||
| Popularity-based ranking (Click Scoring Relevance Framework) |  |  |  | |
| Per-field/flexible scoring |  |  | ||
| Numeric range faceting |  | |||
| Numeric range faceting in distributed search |  | |||
| CSV response writer |  | |||
| Ruby, JSON, XML, Python and response writers | ||||
| Sort by output of a FunctionQuery | ||||
| Highlighting improvements (such as fastvectorhighlight) | ||||
| SolrJ parses grouped and range responses | ||||
| Pseudo-field support to return extra data such as function query values, score explanation and field aliasing with stored fields | ||||
| Relevance Function Queries | ||||
| Pivot Faceting | ||||
| Conditional function queries | ||||
| Per-segment field faceting for improved performance with Near-Real Time search | ||||
| New ranking algorithms (BM25, LM, DFR, etc.) | ||||
| Highlight a facet term instead of query term when browsing facet results | ||||
Security | ||||
| Feature | Solr 1.4.1 | Solr 3.6 | Solr 4.0 | |
| HTTPS encryption between components | ||||
| Access Control List integration for document access control | ||||
| LDAP or Active Directory for user authentication | ||||
| Solr filter queries (fq) for document access control | ||||
Deployment and Monitoring | ||||
| Feature | Solr 1.4.1 | Solr 3.6 | Solr 4.0 | |
| MBeans for indexing activity | ||||
| MBeans for search activity | ||||
| MBeans for filter, result and document caches | ||||
| MBeans for crawling activity | ||||
| Zabbix integration | ||||
| Nagios integration | ||||
| Built-in QPS Dashboard | ||||
| Searchable log files | ||||
| StatsComponent support for dates and strings | ||||
Scaling and Performance | ||||
| Feature | Solr 1.4.1 | Solr 3.6 | Solr 4.0 | |
| SolrCloud Phase 1 (distributed search, cluster state, read-side fault tolerance, and centralized configurations) | ||||
| SolrCloud Phase 2 (distributed indexing, real-time GET, read & write fault tolerance, and cluster elasticity) | ||||
| Distributed search | ||||
| Memory improvements for searching and sorting | ||||
| Post filters and filter cache controls | ||||
| Fast fuzzyquery | ||||
| Tiered merge policy | ||||
| Distributed search grouping (distributed field collapsing) | ||||