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The following services form part of Squirro or are built-in services that Squirro uses. They can all be controlled with the service command as shown in the previous section.
| Name | Description |
|---|---|
| crond | Task runner that executed scheduled tasks regularly. |
| elasticsearch | Main data storage for indexed data. |
| monit | Service monitor used to automatically start services again when they are stopped. |
| mysqld | Relational database used for storage of metadata about Squirro projects. |
| nginx | Web server through which all the requests for the frontend and the Squirro services are served. |
| redis-server | NoSQL database used for caching. |
| sqbulkd | Bulk importing of data. |
| sqcachecleansingd | Cleans the Varnish cache when data changes. |
| sqclusterd | Controls multi-cluster setup of Squirro. |
| sqconfigurationd | Manages application configuration |
| . | |
| sqcontentd | Extracts relevant content from web pages. See Noise Removal in the Data Loading and Processing manual. |
| sqemailsenderd | Sends out emails on behalf of Squirro. |
| sqfeedd | Data provider for feeds. See Feed Provider in the Data Loading and Processing manual. |
| sqfileimportd | Used to import CSV data through the web interface. |
| sqfilteringd | Handles search tagging rules. See Search Tagging in the Data Loading and Processing manual. |
| sqfingerprintd | Manages the fingerprints (Smart Filters). |
| sqfrontendd | Frontend service, implementing the main web interface of Squirro. |
| sqpipelined | Pipeline service. Manages the process of enriching and indexing data. See Data Enrichment in the Data Loading and Processing manual. |
| sqplumberd | Executes pipelets as part of the pipeline. See Pipelets in the Data Loading and Processing manual. |
| sqproviderd | Endpoint for the providers to import data into the system. See |
| Data Connectors in the Data Loading and Processing manual. | |
| sqrelatedstoryd | Detects near-duplicates as part of the pipeline. See Near-Duplicate Detection in the Data Loading and Processing manual. |
| sqschedulerd | Executes scheduled jobs that the Squirro application needs to run. |
| sqsourcerd | Finds data sources for input criteria, such as a query or a web site URL. |
| sqsquirreld | Web crawler component. |
| sqthumblerd | Calculates thumbnails for item images that are displayed in Squirro. |
| sqtopicd | Endpoint for the Squirro API. See Working with |
| Squirro APIs in the API Reference. | |
| sqtopicproxyd | Internal web service access to some project metadata. |
| squserd | Endpoint for user management and authentication. See Authentication in the Reference manual. |
| squserproxyd | Internal web service access to some user data. |
| sqwebshotd | Analyzes web stories and identifies the most relevant image to use for visualization |
| . |