For some I/O application (not open source software) that can be only ran on the customer system, we can only analyze from the Lustre debug log, which makes the debug processing complicated between the customer and developer.

It would better that we can reproduce the bug directly according to the Lustre debug log.

Thus we propose a mechanism to simulate the I/O call sequences via multiop according to the parsing result from the Lustre debug log and try to reproduce the bug happened on the customer environment.