Static discovery protocol ------------------------- Key: JGRP-1841 URL: https://issues.jboss.org/browse/JGRP-1841 Project: JGroups Issue Type: Feature Request Reporter: Bela Ban Assignee: Bela Ban Fix For: 3.5 A new protocol which lists *all* members in the following format: || Logical name || UUID || IP address:port || | A | 1 | 192.168.1.5:7800 | | B | 2 | 192.168.1.6:7800 | | C | 3 | 192.168.1.7:7800 | On startup, the static discovery protocol reads this file and populates the {{UUID.cache}} and {{TP.logical_addr_cache}} caches in the transport. Once this is done, there is no need for lookups as the caches should have the complete information. Note that {{TP.logical_addr_cache_max_size}} should be greater than the max number of nodes. When nodes are started, they need to be given the logical name and UUID indicated in the file. The former can be done via {{JChannel.name(String name)}}, the latter should be done via an {{AddressGenerator}}. Note that UUIDs cannot be reused, so when a channel is disconnected and subsequently reconnected, the address generator should pick a different UUID (perhaps a random one). This should be reflected in the config file as well. Also, nodes need to be started in the order in which they are listed, so we can ping the first nodes for coordinatorship. The goals of this protocol are: * Used when IP multicast is not available * Quick startup * Large clusters: using N-1 for multicast simulation quickly generates too much traffic in the discovery phase