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Multi-RAC cluster system and data access method and device

A data access and clustering technology, which is applied in multi-programming devices, structured data retrieval, electronic digital data processing, etc., can solve the problems of downtime maintenance, troublesome operation, and impact on the external service provided by the application, and achieve the effect of short switching time.

Active Publication Date: 2016-11-09
CHINA CONSTRUCTION BANK
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Problems solved by technology

[0003] That is to say, whether in load balancing mode or active / standby mode, when any set of RAC clusters goes down, it will have a great impact on the external services provided by the application.
And when a new RAC cluster needs to be added, it needs to be shut down for maintenance, and the operation is troublesome

Method used

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  • Multi-RAC cluster system and data access method and device

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Embodiment Construction

[0030] In order to facilitate the understanding of various aspects, features and advantages of the technical solutions of the present invention, the present invention will be specifically described below in conjunction with the accompanying drawings. It should be understood that the various implementations described below are only for illustration, rather than limiting the protection scope of the present invention.

[0031] figure 1 It is an example of a schematic flowchart of a data access method based on multiple RAC clusters according to an embodiment of the present invention. refer to figure 1 , the method includes:

[0032] 10: Determine available data sources according to data source configuration information of multiple RAC clusters.

[0033] Optionally, the data source configuration information of multiple RAC clusters in this embodiment may be preconfigured, and may be updated according to specific conditions (for example, fault isolation, data source recovery, etc...

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Abstract

The invention discloses a multi-RAC cluster system and a data access method and device. The data access method comprises the following steps: determining available data sources according to the data source configuration information of a plurality of RAC clusters; choosing the first data source as a target data source from the available data sources according to a routing policy; according to the target data source, operating a corresponding target database; and calling the target database according to the database operating result or re-choosing the second data source as the target data source. By the multi-RAC cluster system and the data access method and device, new RAC clusters can be flexibly and dynamically added, and halt and maintenance are not required; transparency switching between failed RAC clusters and normal RAC clusters can be realized, the switching time is short, and TPS shaking or failed businesses hardly exists; and the RAC clusters are in equivalent relationship, when in downtime of any one RAC cluster, automatic migration of businesses (such as transaction) can be realized and service to the outside is not affected.

Description

technical field [0001] The present invention relates to the field of RAC clusters, and more specifically, to a multi-RAC cluster system, data access method and device. Background technique [0002] The current Oracle RAC has load balancing and active / standby modes. Load balancing cannot guarantee complete linear expansion after the number of machines increases to a certain level; and the performance of the active / standby mode depends more on the processing power of a single server, which becomes the performance bottleneck of the application. Moreover, in both modes, the entire RAC cluster has been down. Once the RAC cluster is down, the entire application cannot be served externally. If you switch to the standby database, the standby database needs to restart the database due to nomount (that is, not loaded), and generally also needs to restart the application at the same time. [0003] That is to say, whether in load balancing mode or active / standby mode, when any set of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/50G06F17/30
CPCG06F9/5088G06F16/25
Inventor 舒展邢磊黎育龙
Owner CHINA CONSTRUCTION BANK
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