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Path switching method and device

A path switching, path technology

Active Publication Date: 2022-08-09
MACROSAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that when the optimal path of a LUN fails, the IO processing path for accessing the LUN will become longer, affecting the IO processing performance; and forwarding IO through the link between the controllers will undoubtedly increase the link between the controllers. burden, affecting the operating efficiency of the system

Method used

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Embodiment Construction

[0054] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as recited in the appended claims.

[0055] Terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. As used in the embodiments of this application and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates o...

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Abstract

The present application provides a path switching method and device, which are applied to a first controller included in a storage device. The first controller is a controller to which the target LUN belongs, and the storage device further includes at least one second controller. The first controller counts the number of front-end IOs that access the target LUN received through the front-end path of the controller, and the number of forwarded IOs that access the target LUN forwarded by the second controller; according to The number of front-end IOs and the number of forwarded IOs are counted to determine whether switching is required; and when it is determined that switching is required, the controller to which the target LUN belongs is switched to reduce the number of forwarded IOs between controllers, thereby improving the front-end IO processing of the storage device. performance and system efficiency.

Description

technical field [0001] The present application relates to the field of storage technologies, and in particular, to a path switching method and device. Background technique [0002] A storage device refers to a device that provides storage functions, usually including multiple controllers and disks for storing data. The multiple controllers can run services at the same time, and when any controller fails, other controllers take over the services of the failed controller, so the reliability is high. [0003] The front-end server is connected to the storage device through a storage area network (English: Storage Area Network, abbreviation: SAN), and can access the same LUN through different controllers (ie, multiple paths) on the storage device. [0004] The front-end server runs multi-pathing software. The multi-pathing software is responsible for selecting the path for delivering IO for the LUN from the multiple paths corresponding to the LUN, usually selecting the optimized...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06
CPCG06F3/0611G06F3/0635G06F3/0658G06F3/067G06F3/0689
Inventor 上官应兰
Owner MACROSAN TECH