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https://issues.apache.org/jira/browse/ARROW-2558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17659584#comment-17659584
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Rok Mihevc commented on ARROW-2558:
-----------------------------------
This issue has been migrated to [issue
#18907|https://github.com/apache/arrow/issues/18907] on GitHub. Please see the
[migration documentation|https://github.com/apache/arrow/issues/14542] for
further details.
> [Plasma] avoid walk through all the objects when a client disconnects
> ---------------------------------------------------------------------
>
> Key: ARROW-2558
> URL: https://issues.apache.org/jira/browse/ARROW-2558
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++ - Plasma
> Reporter: Zhijun Fu
> Assignee: Zhijun Fu
> Priority: Minor
> Labels: pull-request-available
> Fix For: 0.10.0
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> Currently plasma stores list-of-clients in ObjectTableEntry, which is used to
> track which clients are using a given object, this serves for two purposes:
> - If an object is in use.
> - If the client trying to abort an object is the one who created it.
> A problem with list-of-clients approach is that when a client disconnects, we
> need to walk through all the objects and remove the client pointer from the
> list for each object.
> Instead, we could add a reference count in ObjectTableEntry, and store
> list-of-object-ids in client structure. This could both goals that the
> original approach is targeting, while when a client disconnects, it just walk
> through its object-ids and dereference each ObjectTableEntry, there's no need
> to walk through all objects.
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