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Method for storing real-time database by using similar cluster

A database and data technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as system crashes, unreusable fragments of computer memory, and increased space resource overhead, and achieve high performance.

Inactive Publication Date: 2010-12-01
南京国电南自轨道交通工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in this case, because the real-time database allocates space for each data independently, it is a little difficult in organization and management; and because the space required by various data types is different, with the addition and deletion operations in multiple submissions, A large number of fragments that cannot be reused will be generated in the computer memory. With the operation of the system
It is unacceptable that the overhead of space resources will continue to increase, or even run out, causing the system to crash

Method used

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  • Method for storing real-time database by using similar cluster
  • Method for storing real-time database by using similar cluster
  • Method for storing real-time database by using similar cluster

Examples

Experimental program
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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] The storage structure of this real-time database uses a data structure similar to clustering in the database as the basic data unit, that is, the same type of data is stored centrally. Specifically, each data unit contains a list of the same data type, and only this type of data is stored in the data list, so the space occupied by each data is consistent. This data unit also contains a bitmap established for this data list. The length of the bitmap is equal to the number of data in the list. Each bit in the bitmap corresponds to a data sequence in the list, indicating that this data is available. Used or used. The value of the bit is 0, which means it can be used, that is, new data can be stored; it is 1, which means it has been used, that is, the data has been stored, and it cannot be used for the storage of new data. Because each data is repr...

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PUM

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Abstract

The invention discloses a technique for storing a real-time database by using a similar cluster and supporting operating submission. Data are stored by using a data unit similar to a cluster in the real-time database so as to realize operating incremental submission of the real-time database. Operations can be independently performed respectively during submitting and the time overhead is comparable with the real-time data access, so a plurality of submitted operations can be performed among the real-time data accesses in turn without affecting the real-time access of the real-time database. The distributed data spaces are slightly more than the requirement of actual data spaces during primary submission so as to avoid space resource waste caused by a large amount of idle spaces distributed in advance during the primary submission. Meanwhile, only when new data spaces are assuredly needed or a large amount of data spaces are assuredly not used during submission, the spaces are integrally applied or released by using the data unit as a unit so as to avoid the problem that the used spaces cannot be reused.

Description

Technical field: [0001] The technical invention relates to the field of industrial automation, in particular to the field of distributed monitoring systems. The technical invention can be widely applied to applications such as power grid monitoring, electrified railways and urban rail transit, and comprehensive monitoring in the field of industrial automation. Background technique: [0002] In the field of industrial control, with the development of automation technology, more and more engineering applications, such as industrial production, power dispatching, building automation, fire prevention and control, etc., use monitoring systems to realize process or application automation. When the monitoring system is applied to a certain project, it generally first configures the required data structure according to the requirements of the project application, and then generates the data in the corresponding real-time database according to the configuration at runtime, and operate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 戴宏斌金舒包德梅
Owner 南京国电南自轨道交通工程有限公司
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