Block Level N-Way IP Mirroring
Original Publication Date: 2003-Feb-28
Included in the Prior Art Database: 2003-Feb-28
Disclosed is an application of an N-way tree data structure in an IP networking environment to achieve a self-adapting N-way recursive data redundancy solution. The tree is constructed of iSCSI mirror volumes. Each tree root or subtree root is a system with a RAID 1 volume. The RAID 1 volume consists of the mirror primary, backed by local SCSI storage, and (N - 1) mirror secondaries, each an iSCSI volume mapped in across the IP network. The (N - 1) secondaries are leaves of the tree or subtree roots for further brancing of the tree. Adding intelligence to the iSCSI mirrors allows the N-way mirror tree to become a policy-based self-healing data redundancy tree. The design goals are discussed along with how they are met, and a Figure illustrates the architecture of the system.