Could you please verify below steps on how this will be working - Region X - needs to be replicated Region Y - doesn't need to be replicated Thread # 1 - Writes/puts into Region X in below steps a. Writes/puts into Region X Thread # 2 - Writes into Region Y at exact same time as Thread # 1 in below steps a. Before writing/putting into the cache, call setCacheModeLocal(true) b. Writes/puts into Region Y Thread # 3 - Writes into Region X at exact same time as Thread # 1 in below steps a. Writes/puts into Region X As per your comments Thread # 2 step a) setCacheModeLocal variable is stored locally to it's own thread. Let's go step by step - 1. Thread # 1 step a) is about to write into the region X & before it completes it's writing/putting step.... 2. Thread # 2 step a) sets it to local cache mode. 3. Thread # 1 step a) is now actually writing into the cache - assuming default value of local cache mode variable is false this will be replicated - right? 4. Thread # 2 step b) writes into region Y - it stores locally. 5. Thread # 3 step a) - same as Thread # 1 - correct? So I just need to call setCacheModeLocal(true) only before writing/putting into Region Y. Default value of this variable in local threads is false - right? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4225587#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...