Online data migration method

A data and disk technology, applied in the field of online data migration, can solve problems such as low efficiency and poor versatility, and achieve the effect of improving efficiency

Inactive Publication Date: 2011-06-22
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] In order to overcome the disadvantages of low efficiency and poor versatility of existing data migration methods, the present invention provides an online data migration method

Method used

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Embodiment Construction

[0026] refer to Figure 1~2 .

[0027] The method of the present invention manages read and write requests through multiple paths and bitmap records and controls the data migration process so that the source disk can still be read and written normally during the data migration process, thereby reducing system downtime and maintenance time.

[0028] The data migration management system realizing the method of the present invention is installed on the business server; the business server is connected to the old and new disk arrays through the optical fiber switch, and accesses the logical disks thereon at the same time.

[0029] The data migration system implementing this method includes four parts: multipath management driver, distributor, bitmap and migration management control program.

[0030] The multipath management driver maps the new disk N and the old disk O into a logical disk L, which is provided upward to the operating system. When the operating system performs a w...

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Abstract

The invention discloses an online data migration method, which is used for solving the technical problems of low efficiency and low universality of the conventional data migration method. The technical scheme comprises the following steps of: copying data in a logic unit number (LUN) of a source logic unit into the LUN of a target logic unit, and continuously running a system and a service in a data migration process; simultaneously copying the data updated into the LUN of the source logic unit into the LUN of the target logic unit in the migration process; simultaneously reflecting updating and copying processes by using a single bitmap mapping table; and after the data migration process is finished, using and updating used equipment at any time, and deleting the used equipment. The system and the service are continuously run in the data migration process, so the data migration efficiency and the data migration universality are improved.

Description

technical field [0001] The invention relates to a data migration method, in particular to an online data migration method. Background technique [0002] refer to image 3 . Data migration is a task that needs to be carried out when the existing information system needs to be upgraded as the amount of enterprise information increases. Existing data migration methods mainly include: offline data migration and XML-based data migration. The literature "Research and Design of General Data Migration Tools in Information Systems, Computer and Modernization, Issue 6, 2010, Issue 178" discloses a method for data conversion and migration between heterogeneous databases based on XML. This method analyzes the data format of the source database based on XML, and migrates to the new database after conversion. [0003] But there are at least the following problems in the prior art: 1. The source database cannot be updated during the data conversion and migration process, and normal busi...

Claims

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Application Information

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IPC IPC(8): G06F17/30
Inventor 张晓李战怀张延园
Owner NORTHWESTERN POLYTECHNICAL UNIV
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