METHOD FOR JOURNALING AND RECOVERING SHARED DISK FILE SYSTEM

摘要

PURPOSE: A method for journaling and recovering a shared disk file system is provided to increase a journaling speed by transmitting the changed metadata through network without reflecting to a disk if one host changes the metadata and other host accesses the same metadata in a shared disk environment such as an SAN(Storage Area Network) environment. CONSTITUTION: If a system call operation for processing journaling is occurred, a new transaction region is allotted and initialized by staring a transaction for guaranteeing the recovery, and a transaction type is set. The transaction manages the lock information by getting the lock information for the changed information and adding it to the transaction, and the update of the changed metadata is pinned while the metadata is changed(201). The changed metadata added to the transaction and the changed information for the important general data are stored in a journal space, and the lock information connected to the transaction is unlocked(203).