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https://issues.apache.org/jira/browse/YARN-8002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16393937#comment-16393937
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Weiwei Yang commented on YARN-8002:
-----------------------------------
Hi [~leftnoteasy]
Please see outline of the changes
*AllocationTags*
This is an encapsulation of tags under a certain namespace.
*AllocationTagsManager*
The old API only returns cardinality by OP for +a given application+. The major
change to this class is to add the ability to return cardinality for +a set of
applications+ (aka the scope of a namespace). Using following API
{code}
public long getNodeCardinalityByOp(NodeId nodeId, AllocationTags tags,
LongBinaryOperator op)
public long getRackCardinalityByOp(String rack, AllocationTags tags,
LongBinaryOperator op)
{code}
So the caller only need to provide an AllocationTags (tags with namespace), and
this works for all types of namespaces.
*PlacementConstraintsUtil*
The process of eval PC is unified to following
{code}
// Parse a namespace from given target key
AllocationTagNamespace namespace = AllocationTagNamespace.parse(targetKey);
// Construct target by current app and all apps
TargetApplications ta = new TargetApplications(currentAppId,
atm.getAllApplicationIds());
// Evaluate the namespace according to the given target, before it can be
consumed.
namespace.evaluate(ta);
// Get cardinality for given allocation tags
tm.getRackCardinalityByOp(node.getRackName(), allocationTags, Long::max)
{code}
Rest of changes are UTs, basically I am trying to use \{{AllocationTags}},
\{{AllocationNamespace}} to avoid too many if-else clause when handling certain
type of namespace.
Please see if this helps. Thanks
> Support NOT_SELF and ALL namespace types for allocation tag
> -----------------------------------------------------------
>
> Key: YARN-8002
> URL: https://issues.apache.org/jira/browse/YARN-8002
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Reporter: Weiwei Yang
> Assignee: Weiwei Yang
> Priority: Major
> Attachments: YARN-8002.001.patch, YARN-8002.002.patch
>
>
> This is a continua task after YARN-7972, YARN-7972 adds support to specify
> tags with namespace SELF and APP_ID, like following
> * self/<tag>
> * app-id/<appid>/<tag>
> this task is to track the work to support 2 of remaining namespace types
> *NOT_SELF* & *ALL* (we'll support app-label later),
> * not-self/<tag>
> * all/<tag>
> this will require a bit refactoring in {{AllocationTagsManager}} as it needs
> to do some proper aggregation on tags for multiple apps.
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