over the weekend I tested the UnifiedPush server, deployed on my private OpenShift account. I sent 30k+ messages from my Mac to UP on OpenShift. Messages were received on my iPad and my Galaxy SII.
* 10k Messages from JUnit (via Java Client). Message Rate: every 5 seconds.
* 10k Messages from JUnit (via Java Client). Message Rate: every 2.5 seconds
* 10k Messages from JUnit (via Java Client). Message Rate: every 1.5 seconds
Besides that a cron job was submitting messages to OpenShift (using cURL) every minute.
The system worked fine on OpenShift, and the iOS/Android apps were able to receive the messages just fine.
When I submitted 550 async jobs (using cURL) the apps had issues to display all of the messages, as they came in very quick. However this is a stupid test scenario anyways, as push is not for chats :-)
The OpenShift based deployment of UnifiedPush worked fine for all of these tests.
Currently the cron job is still running and will keep it running.