Hybrid hierarchy storage system in MilkyWay2 supercomputer

Withtherapidimprovementofcomputationcapabilityinhighperformancesupercomputersystem,theimbalanceofperformancebetweencomputationsubsystemandstoragesubsystemhasbecomemoreandmoreserious,especiallywhenvariousbigdataareproducedrangingfromtensofgigabytesuptoterabytes.Toreducethisgap,large-s