METHOD AND APPARATUS FOR DATA MIGRATION

摘要

A system and method of managing the storage of data in a data system when data is to be migrated between a first data system and a second data system is disclosed. A plurality of storage processors is disposed in the communications paths between clients and the first and the second data systems. A chunk of data to be migrated from the first data system to the second data system is represented by a bit map identifying the data that has been transferred, and the bit maps of each of a group of storage processors of the plurality of storage processors performing the migration is maintained coherent across the storage processors. The migration process permits read and write access to the data during the migration process.

主权项

1. A system for managing the storage of data, comprising:
a first data storage system and a second data storage system; a plurality of storage processors disposed in a fabric between a client processor, and the first data storage system and the second data storage system, the storage processors having coherency links; wherein a group of the plurality of storage processors are configured to migrate data stored in a range of data addresses of the first data storage system to the second data storage system such that the client processor can access data stored in the range of data addresses of the first data system during the time that the data stored in a range of data addresses in the first data system is being migrated to the second data system.