[STORM-1093] Launching Workers with resources specified in resource-aware schedulers

• Type: Story
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Component/s: storm-core
• Assignee: Zhuo Liu
• Reporter: Zhuo Liu
• Created: 07/Oct/15 14:28
• Updated: 20/Oct/15 00:23
• Resolved: 19/Oct/15 20:08

Description

Currently, we have Resource Aware Scheduler (STORM-894) in nimbus, which can allocate different types of resource (CPU, onheap-memory, offheap-memory) to the workers assigned to each topology's tasks.

However, such resources are not visible to the supervisor, therefore, supervisor will still launch workers with fixed amount of heap size memory (e.g., -Xmx=768M).

Therefore, we need a whole set of schemes that allow nimbus to put different types of resources to each worker slot, then push the resources with assignment to ZooKeepers; also, at the supervisor side, such resources in each worker slot should be used by supervisor for launching a worker's JVM (initially, the JVM heap size).
This scheme can be used not only by RAS scheduler (STORM-893), but also by any customized scheduler for conducting mem/cpu/network resource specified-scheduling.

In the future, the resources of memory, CPU and network can also be used by supervisor to launch a worker in a resource-segregated container, such as a CGroup or Docker, with isolated Memory/CPU/Network resources.

Issue Links

• relates to: STORM-893 Resource Aware Scheduling