[jboss-jira] [JBoss JIRA] Commented: (JGRP-2) Memory based flow control

[Bela Ban (JIRA)]

    [ http://jira.jboss.com/jira/browse/JGRP-2?page=comments#action_12342685 ] 
            
Bela Ban commented on JGRP-2:
-----------------------------

Memory monitoring could be done by (JDK 5 only) java.lang.management.MemoryMXBean, with notifications.

> Memory based flow control
> -------------------------
>
>                 Key: JGRP-2
>                 URL: http://jira.jboss.com/jira/browse/JGRP-2
>             Project: JGroups
>          Issue Type: Feature Request
>    Affects Versions: 2.2.8
>            Reporter: Bela Ban
>         Assigned To: Bela Ban
>             Fix For: 2.x
>
>   Original Estimate: 2 weeks
>  Remaining Estimate: 2 weeks
>
> Memory and retransmission based flow control protocol. Should be much faster than the current FC
> on a fast network, we can still run out of memory because received_msgs/delivered_msgs becomes very big.
>   Instead of basing FC on the speed of the network, we should also take the number of messages processed
>   (a.k.a delivered_msgs/received_msgs) into account, and only send credits when that number falls below a
>   certain threshold. First: look at the number of received/delivered msgs in the perf test !
>   --> Look into memory-based FC: criteria for sending credits are
>       - available free memory
>       - outstanding retransmission requests (sender sends with each message number of messages sent,
>         receiver keeps track of how many messages received, if diff is > threshold --> pause)
>       - [optional] latency

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