[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=13288190#comment-13288190 ] 

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

Here's an example: say we use TCP and have cluster A,B,C,D,E, which is subsequently split into AB and CDE. There's no way for the AB side of the brain to know that there's a CDE side, and vice versa.

With UDP, it is simple: every side sends a multicast and so the two sides learn of each other. However, with TCP, we have to send messages individually to single members. Without discovery, neither side will know about the other.

> 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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