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Distributed memory system and updating and querying method thereof

A distributed storage and query request technology, applied in transmission systems, special data processing applications, instruments, etc., can solve the problems of master-slave database server speed mismatch, transaction processing availability reduction, data set destruction, etc., to achieve high query speed The effect of parallelism, reduced management and maintenance costs, and large data capacity

Inactive Publication Date: 2013-04-10
TIANJIN NANKAI UNIV GENERAL DATA TECH
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  • Claims
  • Application Information

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Problems solved by technology

There are two fatal problems in the passive update data set: Once the main processor failure causes data damage, the passive update data set will also be destroyed
A careful study of the two-phase commit protocol reveals that the availability of transaction processing is halved in order to obtain this backup data set
Second, full serialization introduces a master-slave database server speed mismatch
Forced synchronization causes the speed of the entire system to be reduced to a fully serialized level

Method used

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  • Distributed memory system and updating and querying method thereof
  • Distributed memory system and updating and querying method thereof

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Embodiment Construction

[0030] figure 1 is a schematic diagram of an embodiment of the present invention, by figure 1 It can be seen that this embodiment includes three security groups, and each security group includes three nodes, each of which has a certain transaction processing capability, and the nodes in each system can be connected to each other through the network or other means , can access each other through the network or other connection methods. Each security group (SafeGroup) is also connected to each other and can also access each other.

[0031] figure 2 It is a schematic diagram of the content stored in the three nodes included in a certain security group (SafeGroup) in the embodiment, represented by figure 2 It can be seen that, in addition to storing its own data, each node also stores mirror data of other nodes in the system, and the stored content is the same.

[0032] The metadata in this embodiment includes: a list of all available nodes in the system, a correspondence ta...

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Abstract

The invention provides a distributed memory system, which comprises a safety group consisting of at least one node, wherein the node is used for saving data and can be used for saving copies of other nodes in the same safety group. In addition, the invention also provides an updating and querying method aiming at the distributed memory system. The distributed memory system has the beneficial effects that the system has high usability, high query parallelism and management and extension capacity of large data volume and the management cost and the maintenance cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of data storage, in particular to a distributed storage system with high availability. Background technique [0002] Facing the explosive growth of data volume, there are still many technical problems that need to be solved urgently in the current database technology. For the database, recording the correct processing results is only the most basic requirement. In addition, the database also needs to improve the processing speed, data availability, data security and data set expansion. Big data puts forward higher requirements on the above four aspects. [0003] According to the laws of physics, increasing redundancy is the only way to increase data availability. At present, it is mainly through hardware level redundancy, communication link level redundancy, software redundancy and data redundancy. Data redundancy is often used to improve high availability. [0004] Traditional data redundancy schemes include the ...

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Application Information

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IPC IPC(8): G06F17/30H04L29/08
Inventor 任景彪孟祥斌施宁崔维力武新赵伟
Owner TIANJIN NANKAI UNIV GENERAL DATA TECH