Masterless distributed batch scheduling engine

A distributed, high availability scalable task execution framework that does not use a master. Each server periodically checks if there are new jobs that are scheduled to execute immediately and picks a task for execution. Multiple batch server configurations can be created and executed during a specific time period where each server can behave differently to provide improved response time to online users. Each server can be configured to execute a different number of parallel tasks during a time period, execute fewer tasks or no batch task at all, and then change server behavior to execute many tasks in parallel at a different time when there are no online users. Automatic transaction assists in task restart in the case of infrastructure failures. If infrastructure failure happens before the task completes, the transaction will be rolled back by the database automatically.