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From "Burn Lewis (JIRA)" <...@uima.apache.org>
Subject [jira] [Commented] (UIMA-5214) Add option to restrict vertical scaling of DUCC service instances
Date Tue, 11 Apr 2017 20:14:41 GMT

    [ https://issues.apache.org/jira/browse/UIMA-5214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15964897#comment-15964897

Burn Lewis commented on UIMA-5214:

With UIMA-4712 fixed shares are allocated horizontally if possible, i.e. places no more than
1 share for each job/service on the same node.  But when all available nodes have 1 it reverts
to vertical scaling, so the remains share may stack up on the same node.
We could add an option for jobs & services to indicate which type of stacking is desired,
and if the number per node is restricted.  e.g. if a service uses a dedicated port it could
request "horizontal" with a max of 1.  Currently this applies only to fixed allocations ...
if we extend this to preemptable requests it would affect the selection of resources to be
preempted if we try to maintain the desired stacking.
Perhaps both attributes could be specified in one new property, e.g.  --process_stacking with
value: (horizontal|vertical)<-max-per-node>
  --process_stacking horizontal-5
  --process_stacking vertical

> Add option to restrict vertical scaling of DUCC service instances
> -----------------------------------------------------------------
>                 Key: UIMA-5214
>                 URL: https://issues.apache.org/jira/browse/UIMA-5214
>             Project: UIMA
>          Issue Type: Improvement
>          Components: DUCC
>            Reporter: Burn Lewis
>            Priority: Minor
>             Fix For: future-DUCC
> Could also add an option to request horizontal or vertical scaling

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