Implement MaxCapacityUsageInstanceConstraint soft constraint (#463)

The constraint evaluates the score by checking the max used capacity key out of all the capacity
keys.
The higher the maximum usage value for the capacity key, the lower the score will be, implying
that it is that much less desirable to assign anything on the given node.
It is a greedy approach since it evaluates only the most used capacity key.
6 files changed
tree: 7dd8206bffc766d3d9f5b0c6cb125460a8e94399
  1. helix-admin-webapp/
  2. helix-agent/
  3. helix-core/
  4. helix-front/
  5. helix-rest/
  6. recipes/
  7. scripts/
  8. website/
  9. .gitignore
  10. build
  11. bump-up.command
  12. deploySite.sh
  13. helix-style-intellij.xml
  14. helix-style.xml
  15. hpost-review.sh
  16. LICENSE
  17. NOTICE
  18. pom.xml
  19. README.md
README.md

Apache Helix

Helix is part of the Apache Software Foundation.

Project page: http://helix.apache.org/

Mailing list: http://helix.apache.org/mail-lists.html

Build

mvn clean install package -DskipTests

WHAT IS HELIX

Helix is a generic cluster management framework used for automatic management of partitioned, replicated and distributed resources hosted on a cluster of nodes. Helix provides the following features:

  1. Automatic assignment of resource/partition to nodes
  2. Node failure detection and recovery
  3. Dynamic addition of Resources
  4. Dynamic addition of nodes to the cluster
  5. Pluggable distributed state machine to manage the state of a resource via state transitions
  6. Automatic load balancing and throttling of transitions