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Shard Aging (OLAP)
JoeWinter edited this page Feb 19, 2015
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[Table of Contents](https://github.com/dell-oss/Doradus/wiki/OLAP Databases: Table-of-Contents) | Previous | Next
OLAP Data Model: Shard Aging
When at least one shard is assigned an expiration date, Doradus OLAP automatically creates a background `data-aging` task that checks for and deletes expired segments once per day. Optionally, the schedule of an application's `data-aging` task can be explicitly controlled in the schema via the aging-check-frequency application option.
Technical Documentation
[Doradus OLAP Databases](https://github.com/dell-oss/Doradus/wiki/Doradus OLAP Databases)
- Architecture
- OLAP Database Overview
- OLAP Data Model
- Doradus Query Language (DQL)
- OLAP Object Queries
- OLAP Aggregate Queries
- OLAP REST Commands
- Architecture
- Spider Database Overview
- Spider Data Model
- Doradus Query Language (DQL)
- Spider Object Queries
- Spider Aggregate Queries
- Spider REST Commands
- [Installing and Running Doradus](https://github.com/dell-oss/Doradus/wiki/Installing and Running Doradus)
- [Deployment Guidelines](https://github.com/dell-oss/Doradus/wiki/Deployment Guidelines)
- [Doradus Configuration and Operation](https://github.com/dell-oss/Doradus/wiki/Doradus Configuration and Operation)
- [Cassandra Configuration and Operation](https://github.com/dell-oss/Doradus/wiki/Cassandra Configuration and Operation)