Remove shared transport ----------------------- Key: JGRP-1844 URL: https://issues.jboss.org/browse/JGRP-1844 Project: JGroups Issue Type: Task Affects Versions: 3.5 Reporter: Bela Ban Assignee: Bela Ban Fix For: 4.0 I'm thinking of deprecating the shared transport [1] and remove it in 4.0. The replacement would be fork channels [2]. Here's my reasoning: * Shared transports are quite a complex beast: initialization (ref counting), cluster-name and local-addr are not used in TP when shared, duplicate logic. Removing this will make the code base smaller * All protocols *above* shared transports are not shared, e.g. FD_SOCK, NAKACK, UNICAST etc all maintain their own threads, retransmission tables, sockets etc. With fork channels, everything up to the FORK protocol *is* shared * TUNNEL doesn't work with shared transports (throws an exception) * Hidden insertion of TP$ProtocolAdapter into the stack when shared transports are used * Unneeded cost of sending N-1 messages (e.g. with TCP). Currently we send a message with dest null and no IP multicast capable transport to all physical addresses in the transport, which is a waste Thoughts ? My +100 for removing shared transports in 4.0... [1] http://www.jgroups.org/manual/html/user-advanced.html#SharedTransport [2] http://www.jgroups.org/manual/html/user-advanced.html#ForkChannel