[
https://issues.apache.org/jira/browse/STORM-898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15041653#comment-15041653
]
ASF GitHub Bot commented on STORM-898:
--------------------------------------
Github user revans2 commented on a diff in the pull request:
https://github.com/apache/storm/pull/921#discussion_r46693605
--- Diff: storm-core/src/jvm/backtype/storm/scheduler/Topologies.java ---
@@ -67,4 +67,17 @@ public TopologyDetails getByName(String topologyName) {
}
return _allComponents;
}
+
+ public Topologies getCopy() {
+ return new Topologies(this.topologies);
+ }
+
+ @Override
+ public String toString() {
+ String ret = "Topologies:\n";
+ for (TopologyDetails td : this.getTopologies()) {
+ ret += td.toString() + "\n";
+ }
+ return ret;
--- End diff --
Can we use a StringBuilder here instead?
```
StringBuilder ret = new StringBuilder();
ret.append("Topologies:\n");
for (TopologyDetails td : this.getTopologies()) {
ret.append(td).append('\n');
}
return ret.toString();
```
(Also minor)
> Add priorities and per user resource guarantees to Resource Aware Scheduler
> ---------------------------------------------------------------------------
>
> Key: STORM-898
> URL: https://issues.apache.org/jira/browse/STORM-898
> Project: Apache Storm
> Issue Type: New Feature
> Components: storm-core
> Reporter: Robert Joseph Evans
> Assignee: Boyang Jerry Peng
> Attachments: Resource Aware Scheduler for Storm.pdf
>
>
> In a multi-tenant environment we would like to be able to give individual
> users a guarantee of how much CPU/Memory/Network they will be able to use in
> a cluster. We would also like to know which topologies a user feels are the
> most important to keep running if there are not enough resources to run all
> of their topologies.
> Each user should be able to specify if their topology is production, staging,
> or development. Within each of those categories a user should be able to give
> a topology a priority, 0 to 10 with 10 being the highest priority (or
> something like this).
> If there are not enough resources on a cluster to run a topology assume this
> topology is running using resources and find the user that is most over their
> guaranteed resources. Shoot the lowest priority topology for that user, and
> repeat until, this topology is able to run, or this topology would be the one
> shot. Ideally we don't actually shoot anything until we know that we would
> have made enough room.
> If the cluster is over-subscribed and everyone is under their guarantee, and
> this topology would not put the user over their guarantee. Shoot the lowest
> priority topology in this workers resource pool until there is enough room to
> run the topology or this topology is the one that would be shot. We might
> also want to think about what to do if we are going to shoot a production
> topology in an oversubscribed case, and perhaps we can shoot a non-production
> topology instead even if the other user is not over their guarantee.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
