[jboss-jira] [JBoss JIRA] Commented: (JGRP-1331) Digest: remove low seqno and compress highest_delivered and highest_received seqnos

[ https://issues.jboss.org/browse/JGRP-1331?page=com.atlassian.jira.plugin.... ] Bela Ban commented on JGRP-1331: -------------------------------- OK, so the following optimizations were done: - low seqno was removed from the digest - highest_delivered and highest_received were compressed (Util.encodeLongSequence()). Since we know that highest_received is usually only a small offset to highest_delivered, we can only send the delta - Added a generic method Util.encodeLong(long num) to send only the relevant bits of a long across the wire. E.g. a seqno=30000 uses only 2 bytes (plus 1 length byte), instead of 8 ! - Applied Util.encodeLong() and Util.encodeLongSequence() to a bunch of classes, e.g. Range, NakAckHeader.seqno etc. Whenever we send longs that have only a few bits set, this compression reduces the data sent over the wire dramatically ! - Reduced the serialized JoinRsp by sending the member list only once, and not twice (in the view and the digest). A JoinRsp containing a 1000 members generates 43'000 bytes of serialized data, but onyl 23'000 bytes of serialized data with the new compressed code. See SizeTest.testlargeJoinRsp() -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira