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https://issues.apache.org/jira/browse/YARN-3409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15733152#comment-15733152
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Wangda Tan commented on YARN-3409:
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And,
bq. do you mean having an extra affinity/anti-affinity constraint expression or
use the same constraint expression? Probably we will need a separate one.
I would prefer to use the same one, this is why I suggest to name the field to
"placementStrategy" instead of "constraintExpression". To me YARN-4902 is the
goal, we should align new changes to RequestRequest to the new proposal.
So example of how to specify anti-affinity and constraint may look like:
{code}
# Run on node with JDK5 or JDK6, and anti-affinity to itself's container
placement-strategy = (JDK5 || JDK6) && anti-affinity-to <my-application>
# Run on node with CENTOS6 and SSD, and affinity-to application-2
placement-strategy = CENTOS6 && SSD && affinity-to application_3333_0002
{code}
Please share your thoughts on this.
> Add constraint node labels
> --------------------------
>
> Key: YARN-3409
> URL: https://issues.apache.org/jira/browse/YARN-3409
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: api, capacityscheduler, client
> Reporter: Wangda Tan
> Assignee: Naganarasimha G R
> Attachments: Constraint-Node-Labels-Requirements-Design-doc_v1.pdf,
> YARN-3409.WIP.001.patch
>
>
> Specify only one label for each node (IAW, partition a cluster) is a way to
> determinate how resources of a special set of nodes could be shared by a
> group of entities (like teams, departments, etc.). Partitions of a cluster
> has following characteristics:
> - Cluster divided to several disjoint sub clusters.
> - ACL/priority can apply on partition (Only market team / marke team has
> priority to use the partition).
> - Percentage of capacities can apply on partition (Market team has 40%
> minimum capacity and Dev team has 60% of minimum capacity of the partition).
> Constraints are orthogonal to partition, they’re describing attributes of
> node’s hardware/software just for affinity. Some example of constraints:
> - glibc version
> - JDK version
> - Type of CPU (x86_64/i686)
> - Type of OS (windows, linux, etc.)
> With this, application can be able to ask for resource has (glibc.version >=
> 2.20 && JDK.version >= 8u20 && x86_64).
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