[jboss-jira] [JBoss JIRA] Commented: (JGRP-1181) PING messages to entire cluster limit scalability.

[Bela Ban (JIRA)]

    [ https://jira.jboss.org/browse/JGRP-1181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12551515#action_12551515 ] 

Bela Ban commented on JGRP-1181:
--------------------------------

Another possibility could be to define a number N which is a rank; everyone higher than N does NOT response. 
Example: we have {A,B,C,D,E,F,G}. If we set N=3, then that means that A, B and C will respond, but nobody else.

This is the same as saying the oldest N members should reply.

If A leaves, then we'll have view {B,C,D,E,F,G} and with N=3, B, C and D will respond.

> PING messages to entire cluster limit scalability.
> --------------------------------------------------
>
>                 Key: JGRP-1181
>                 URL: https://jira.jboss.org/browse/JGRP-1181
>             Project: JGroups
>          Issue Type: Feature Request
>            Reporter: Jonathan Oddy
>            Assignee: Bela Ban
>             Fix For: 2.11
>
>
> PING messages generate a response from every node that receives them. In a large cluster this will lead to a large number of responses needing to be processed. Making PINGs target-able (e.g. ping to only coordinators, ping to anyone with a view not matching ViewID N) could significantly reduce the number of nodes responding to a request.

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