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Posted to common-commits@hadoop.apache.org by ww...@apache.org on 2018/09/18 09:20:51 UTC
hadoop git commit: YARN-8787. Fix broken list items in
PlacementConstraints documentation. Contributed by Masahiro Tanaka.
Repository: hadoop
Updated Branches:
refs/heads/trunk b6ad84ebb -> 78a0d173e
YARN-8787. Fix broken list items in PlacementConstraints documentation. Contributed by Masahiro Tanaka.
Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/78a0d173
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/78a0d173
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/78a0d173
Branch: refs/heads/trunk
Commit: 78a0d173e4f0c2f2679a04edd62a60fb76dde4f0
Parents: b6ad84e
Author: Weiwei Yang <ww...@apache.org>
Authored: Tue Sep 18 17:19:33 2018 +0800
Committer: Weiwei Yang <ww...@apache.org>
Committed: Tue Sep 18 17:19:39 2018 +0800
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.../hadoop-yarn-site/src/site/markdown/PlacementConstraints.md.vm | 2 ++
1 file changed, 2 insertions(+)
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http://git-wip-us.apache.org/repos/asf/hadoop/blob/78a0d173/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/PlacementConstraints.md.vm
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diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/PlacementConstraints.md.vm b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/PlacementConstraints.md.vm
index 4ac1683..a583493 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/PlacementConstraints.md.vm
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/PlacementConstraints.md.vm
@@ -87,6 +87,7 @@ An example of PlacementSpec is the following:
zk=3,NOTIN,NODE,zk:hbase=5,IN,RACK,zk:spark=7,CARDINALITY,NODE,hbase,1,3
```
The above encodes three constraints:
+
* place 3 containers with tag "zk" (standing for ZooKeeper) with node anti-affinity to each other, i.e., do not place more than one container per node (notice that in this first constraint, the SourceTag and the TargetTag of the constraint coincide);
* place 5 containers with tag "hbase" with affinity to a rack on which containers with tag "zk" are running (i.e., an "hbase" container should not be placed at a rack where an "zk" container is running, given that "zk" is the TargetTag of the second constraint);
* place 7 containers with tag "spark" in nodes that have at least one, but no more than three, containers with tag "hbase".
@@ -132,6 +133,7 @@ The example constraints used above could be extended with namespaces as follows:
zk=3,NOTIN,NODE,not-self/zk:hbase=5,IN,RACK,all/zk:spark=7,CARDINALITY,NODE,app-id/appID_0023/hbase,1,3
```
The semantics of these constraints are the following:
+
* place 3 containers with tag "zk" (standing for ZooKeeper) to nodes that do not have "zk" containers from other applications running;
* place 5 containers with tag "hbase" with affinity to a rack on which containers with tag "zk" (from any application, be it the same or a different one) are running;
* place 7 containers with tag "spark" in nodes that have at least one, but no more than three, containers with tag "hbase" belonging to application with ID `appID_0023`.
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