[infinispan-dev] JGRP-1317 and large clusters

[Manik Surtani]

On 12 Sep 2013, at 15:15, Bela Ban <bban at redhat.com> wrote:

> FYI,
> 
> 
> if you're running large clusters, you might be interested to know that I 
> implemented another optimization: JGRP-1317 [1].
> 
> The effect of it is that (in decreasing order of importance):
> 
> - Regular view messages to existing members don't carry a digest any 
> longer. This is a significant size reduction, as a digest has 2 longs 
> per member (although compressed for network transmission)
> 
> - Where we have a view and a digest (e.g. JoinRsp, merge response, 
> MergeView), the digest's 'members' field and the view's 'members' field 
> point to the same memory location
> 
> - When we send such an object across the network, the 'members' field is 
> only marshalled once, leading to smaller messages
> 
> 
> Next up, I'm going to tackle [2] which will reduce the size of view 
> messages even further: instead of sending the *full view* every time, we 
> only send delta views. I believe JGRP-1317 and JGRP-1354 will have a 
> huge impact on systems with a large number of nodes.

Nice!

> 
> 
> [1] https://issues.jboss.org/browse/JGRP-1317
> [2] https://issues.jboss.org/browse/JGRP-1354
> 
> 
> -- 
> Bela Ban, JGroups lead (http://www.jgroups.org)
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--
Manik Surtani