A management node includes a distributed task management unit that divides a task including a plurality of processing targets and allocates the task to a plurality of execution nodes, and an execution status information memory update unit that updates execution status information of the task in accordance with execution status update requests from the execution nodes. Other embodiments are disclosed. The base structures encapsulate the Data Instances and can generally be identical in form and function, and application independent. At least some of the gastight cladding tubes have a multilayer wall.