[infinispan-dev] Infinispan S3 Cluster + Store Success ! (+serious performance problems)

Hi Infinispan mailing list, a couple of days ago, I succeeded in writing an entity store for qi4j (http://www.qi4j.org/) using Infinispan, the S3 store and the S3_PING JGroups clustering configuration. It works like a charm, discovers new EC2 instances, synchronizes and process transactions perfectly... you did an amazing job. But I have a serious performance problems. When I write an update (<1k) to the cache, it takes around 500 ms to be stored on S3. The best result I achieved was around 10 cache writes per second... it is abysmal (when using httpclient directly I had a min of 100/sec using 20 connections). When I commit a JTA transaction made of 100 cache writes, it takes around 30 seconds (cpu<5%) and the first write ends on S3 after at least 5 seconds of 'idle' time (SSL negotiation??). I disabled the store asynchronism and work without JTA transactions, no effect on performance. I also modified the jClouds configuration, multiplying by 10 all worker threads, connections and the rest... no improvement! When I (load) test my web app (wicket based+qi4j+...infinispan) the cpu stays idle (<5%) and ... JTA transactions fails (timeouts) and I cannot acquire locks before the 10 seconds timeout. Is there something fishy in the jclouds configuration ? in the httpnio use of jclouds ? in the version of jclouds (the trunk one with the blob store seems to be so different) ? Am I missing something ? Any pointer to any doc/help/experience is welcome ;-) Philippe