Synchronizing a distributed mirror

Details Synchronizing a distributed mirror Synchronizing a distributed mirror

2006-01-31

2006-01-31

Kim, Hong (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S114000, C711S153000

Reexamination Certificate

active

06993635

ABSTRACT:
Apparatus and methods for synchronizing a distributed mirror. A computer system incorporating the invention may divide a mirror source into N chunks, assigning N storage processors responsibility for respective chunks of the mirror. The storage processors then may communicate among themselves to synchronize a distributed mirror. The storage processors may communicate mirror source blocks or their addresses and host-initiated (user) data requests. A storage processor may assist the synchronization of a mirror. The processor may accept responsibility for a chunk of a mirror source and communicate with a second storage processor responsible for another chunk of the mirror source to synchronize the mirror. The storage processor may track addresses of source blocks currently in use for synchronization, as well as addresses of source blocks to be synchronized after the blocks currently in use for synchronization.

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