Control method and system for IO request during data migration process

A technology of IO request and migration process, which is applied in the input/output process of data processing, electrical digital data processing, instruments, etc., and can solve problems such as destruction, data inconsistency, and loss

Inactive Publication Date: 2017-05-10
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If during the data migration process, the user happens to perform an IO operation on the storage unit to be migrated, if th...

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  • Control method and system for IO request during data migration process
  • Control method and system for IO request during data migration process

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Embodiment Construction

[0046] The core of the present invention is to provide a method and system for controlling IO requests during the data migration process, which can control the IO requests during the data migration process, and avoid performing IO operations on the storage units being migrated after the migration is completed. Data inconsistency, loss, and corruption occur.

[0047] In order to make the above objects, features and advantages of the present invention more comprehensible, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0048] In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways than those described here, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Accordingly, t...

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Abstract

The invention discloses a control method and system for an IO request during a data migration process. The method comprises steps of dividing a logic volume into a plurality of first data sectors having the same size, defining the first data sector as a data migration unit, detecting a data migration state of a data sector of the first data sector corresponding to a current IO request data block, and controlling an IO request execution action according to the data migration state of the data sector of the first data sector corresponding to the current IO request data block. During the data migration process, a user happens to execute an IO request to a migrated storage unit, and determines the data migration state of the first data sector corresponding to the current IO request and determines whether the data migration of the first data sector conflicts with the IO request; then the user controls the IO request according to a determining result, so IO operation to the storage unit under migration can be avoided; and data inconsistency, loss and damage after the migration can be avoided.

Description

technical field [0001] The invention relates to the technical field of data migration, in particular to a method and system for controlling IO requests during data migration. Background technique [0002] With the development of information technology, data migration is often encountered in the field of storage software. Data migration refers to the transfer of data between different storage devices, moving data to a new storage space, and releasing the original storage space so that new data can be accommodated. [0003] Data migration can balance the available space of different storage devices, and can also balance the IO load of different controllers. Automatic tiering technology is to complete the exchange of data by means of migration. Migration involves a large amount of data copying, so the entire migration process usually takes a long time, but it is transparent to users and should not affect user IO operations. If during the data migration process, the user happ...

Claims

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Application Information

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IPC IPC(8): G06F3/06
CPCG06F3/0619G06F3/0644G06F3/0647G06F3/0683
Inventor 刘丹
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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