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https://issues.apache.org/jira/browse/YARN-3409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16102100#comment-16102100
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Konstantinos Karanasos commented on YARN-3409:
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We can use brackets instead of square brackets:
{{node1:java=8(string),ssd=false(boolean)}}.
Using {{:}} both for the node and the data type will lead to confusion I am
afraid. In the expression {{n1:java=jdk8,n2:boolean=false}}, one could read it
as node n1 has an attribute java=jdk8, and node n2 has an attribute
boolean=false, while another can think that n2 is the name of an attribute in
n1.
> Support Node Attribute functionality
> ------------------------------------
>
> Key: YARN-3409
> URL: https://issues.apache.org/jira/browse/YARN-3409
> Project: Hadoop YARN
> Issue Type: New Feature
> Components: api, capacityscheduler, client
> Reporter: Wangda Tan
> Assignee: Naganarasimha G R
> Attachments: 3409-apiChanges_v2.pdf (4).pdf,
> 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).
> Attributes are orthogonal to partition, they’re describing features of node’s
> hardware/software just for affinity. Some example of attributes:
> - 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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