Mastering Mesos

Two-level scheduling

Mesos has a two-level scheduling mechanism to allocate resources to and launch tasks on different frameworks. In the first level, the master process that manages slave processes running on each node in the Mesos cluster determines the free resources available on each node, groups them, and offers them to different frameworks based on organizational policies, such as priority or fair sharing. Organizations have the ability to define their own sharing policies via a custom allocation module as well.

In the second level, each framework's scheduler component that is registered as a client with the master accepts or rejects the resource offer made depending on the framework's requirements. If the offer is accepted, the framework's ...