A computer-executable method, system, and computer program product of managing I/O received within a Lustre file system, the computer-executable method, system, and computer program product comprising: receiving a data I/O request, wherein the data I/O request relates to data stored within the Lustre file system; processing the data I/O request in a journal stored on a fast data storage device within the Lustre file system; analyzing the journal to make a determination related to the data I/O request; and responding to the data I/O request.