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Naganarasimha G R commented on YARN-3409:
-----------------------------------------

bq.  node1:java=8\[string\],ssd=false\[boolean\]
thanks for clarifying  [~kkaranasos], IIUC you want basically {{"key=value"}} pairs. I also some what agree with your approach except that {{"[ ]"}} are generally used as optional parameters for a CLI command, so it would be little complicated to be captured in help. So can we think of something like {{node1:java=jdk8,ssd:boolean=false,ethernetcards:long=2}} where in after attribute name if type is not mentioned we can consider it as string? 

> 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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