Hi, what I was suggesting in the call in order to get rid of the indexing: Currently we're doing this: 1. thread on primary owner executes the write and sends indexing request (synchronous RPC) to index master, waits for the response 2. remote/OOB thread on indexing master enqueues the indexing request and waits 3. indexing thread (on indexing master) retrieves the request, processes it and wakes up the waiting remote/OOB thread 4. remote/OOB thread sends RPC response 5. primary owner receives the RPC response (in OOB thread, inside JGroups) and wakes up the thread sending the RPC What I suggest is that: 1. thread on primary owner executes the write and sends indexing request as asynchronous RPC (single message) to index master, and waits on a custom synchronization primitive 2. remote/OOB thread on indexing master enqueues the indexing request and returns back to the threadpool 3. indexing thread (on indexing master) retrieves the request, processes it and sends asynchronouse RPC (again single message) to the primary owner 4. primary owner (in OOB thread) receives the message and wakes up thread waiting on the custom synchronization primitive (in Infinispan) My 2c Radim -- Radim Vansa <rvansa(a)redhat.com&gt; JBoss DataGrid QA _______________________________________________ infinispan-dev mailing list infinispan-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev