# Advanced data lifecycle management

This section explains how data lifecycle is maintained when working with a tiered Weka system configuration, together with the options for control. The following subjects are covered:

* Advanced explanation of [time-based policies for data storage location](https://docs.weka.io/4.0/fs/tiering/advanced-time-based-policies-for-data-storage-location).
* System behavior when [tiering, accessing or deleting data in tiered filesystems](https://docs.weka.io/4.0/fs/tiering/data-management-in-tiered-filesystems).
* [Transition between SSD-only and tiered filesystems.](https://docs.weka.io/4.0/fs/tiering/transition-between-tiered-and-ssd-only-filesystems)
* How to [manually pre-fetch tiered data from an object-store and release of data from SSD to the object-store](https://docs.weka.io/4.0/fs/tiering/pre-fetching-from-object-store).