Well, this threshold would be configurable, naturally. Probably relate to a function of number of hits over a given period of time rather than a fixed number of hits, as this needs to decay as well. Perhaps the same half-life parameters used for the degree of participation. Tunneling (ClusteredCacheLoader?) is pretty efficient compared to a state transfer as it only pulls back the contents of individual node as opposed to an entire region. FLUSH blocking the entire cluster for state transfer within a specific Partition would be a problem though, although Bela did mention some improvements in JGroups 2.6 that may be able to deal with this. Bela? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4077016#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...