Method and apparatus for migration of a virtualized file system, data storage system for migration of a virtualized file system, and file server for use in a data storage system

摘要

The present invention relates to a method and an apparatus for data migration of a first file system in a data storage system comprising a plurality of client computers 100, a first file system managing unit 310 for managing the first file system and being connected to the plurality of client computers 100, and a second file system managing unit 410 for managing a second file system and being connected to the first file system managing unit 310, the second file system comprising a plurality of data files and the first file system comprising a plurality of external link objects, each external link object of the first file system being associated with a respective data file of the second file system for enabling client access to the respective data file of the second file system.

主权项

1. An apparatus for data migration of a first file system in a data storage system comprising a plurality of client computers, a first file system managing unit for managing the first file system and being connected to the plurality of client computers, and a second file system managing unit for managing a second file system and being connected to the first file system managing unit,
the second file system comprising a plurality of data files and the first file system comprising a plurality of external link objects, each external link object of the first file system being associated with a respective data file of the second file system for enabling client access to the respective data file of the second file system; the apparatus comprising the first file system managing unit adapted to: divide file content data of a first file of the second file system into a first group of migration data blocks, and migrate file content data of a first file of the second file system from the second file system managing unit to the first file system managing unit in units of migration data blocks of the first group of migration data blocks, wherein client access to data content of a migration data block of the first group of migration data blocks is temporarily held off while the respective migration data block is migrated from the second file system managing unit to the first file system managing unit, and client access requests directed to the respective migration data block of the first group of migration data blocks received during migration of the respective migration data block are queued and executed after the respective migration data block of the first group of migration data blocks has been migrated.