iSCSI Method and System for recovery of iSCSI storage system used network distributed file system

摘要

The present invention relates to a method and system for effectively recovering a failure in an asymmetric cluster distributed file system using an iSCSI storage system. The present invention relates to a method for failover of a network distributed file system based iSCSI storage system in which a block layout manager processes iSCSI block read and write requests of a specific iSCSI target belonging to a specific iSCSI gateway by a specific iSCSI initiator A first step of recording at least one of read and write type information, data size information, and LUN information; A second step of transferring at least one of read and write type information, data size information and LUN information to the iSCSI session manager; the iSCSI session manager aggregating the information for each iSCSI gateway; iSCSI session manager updates the iSCSI gateway rank index from the information aggregated for each iSCSI gateway; iSCSI session manager monitors the presence or absence of failure of each iSCSI gateway through an agent installed in each iSCSI gateway; And a sixth step of distributing to the normal iSCSI gateway all of the iSCSI targets belonging to the iSCSI gateway when the iSCSI session manager determines that the specific iSCSI gateway has failed.