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The goal is to (a) reduce the number of properties needed and (b) determine the values dynamically.

Examples:

Determine the best min/max size of a thread pool
Find out what the best timeout values are for retransmission, e.g. based on average retransmission times
Determine the optimal number of credits in FC

This is similar to the JVM setting where, starting with 1.5, the initial values can be set, but over time, the JVM dynamically changes them.

In the best case, a config contains only a list of protocols without any properties, and JGroups will figure out the correct values.

is related to

JGRP-1037 Ergonomics: size thread pools dynamically

JGRP-1118 NAKACK: use_mcast_xmit should be set based on the available transport

JGRP-1053 UNICAST: set retransmission timeout based on actual retransmission times

JGRP-1054 NAKACK: retransmission timeouts based on actual retransmission values

relates to

JGRP-1129 Ergonomics: size max_bundle_size and max_bundle_timeout (in TP) dynamically

JGRP-1238 STABLE: determine best value for max_bytes

JGRP-1244 Discovery: set max_rank dynamically

(2 relates to)