[jboss-jira] [JBoss JIRA] (JGRP-2098) Discovery: reduce messages when IpAddressUUID is used

[Bela Ban (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-2098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13296786#comment-13296786 ] 

Bela Ban commented on JGRP-2098:
--------------------------------

To reduce discovery traffic, an attribute {{only_coord_replies}} (or similar) would be added to {{Discovery}}. When set, only coordinators (not everyone) reply to a {{GET_MBRS_REQ}} with a {{GET_MBRS_RSP}}. 

In addition, logical name and UUID-address mappings are not sent back with the reply (making it smaller). At the end of the day, the coord(s) could simply send empty {{GET_MBR_RSP}} messages, as the sender of those replies will all be coordinators, and their addresses ({{IpAddressUUIDs}}) can be used to send the JOIN-REQs to.

> Discovery: reduce messages when IpAddressUUID is used
> -----------------------------------------------------
>
>                 Key: JGRP-2098
>                 URL: https://issues.jboss.org/browse/JGRP-2098
>             Project: JGroups
>          Issue Type: Feature Request
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 4.0
>
>         Attachments: LESS_PING.java
>
>
> Since IpAddressUUID already contains the physical address, we don't need to exchange physical addresses in the discovery phase.
> Investigate whether this leads to reduced messaging in discovery, ie. only the coords might send a response. Once the new member has the view, it automatically knows the IP addresses and ports of all members, as the addresses in the view are of type IpAddressUUID.
> Also investigate whether address:logical_name associations should be done in a separate protocol, e.g. NAMING.



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