WO2017173842A1 - Method of partitioning and storing real-time distributed database in memory in energy management system - Google Patents

Method of partitioning and storing real-time distributed database in memory in energy management system Download PDF

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WO2017173842A1
WO2017173842A1 PCT/CN2016/109167 CN2016109167W WO2017173842A1 WO 2017173842 A1 WO2017173842 A1 WO 2017173842A1 CN 2016109167 W CN2016109167 W CN 2016109167W WO 2017173842 A1 WO2017173842 A1 WO 2017173842A1
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data
partition
different
management system
energy management
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吴庆曦
彭晖
王瑾
靳晶
魏娜
陈鹏
季学纯
葛以踊
高原
孟勇亮
孙世明
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国电南瑞科技股份有限公司
国电南瑞南京控制系统有限公司
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    • G—PHYSICS
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    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/22—Indexing; Data structures therefor; Storage structures
    • G06F16/2282—Tablespace storage structures; Management thereof
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor

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  • the invention relates to a partition storage method for a distributed real-time memory database of an energy management system.
  • EMS Energy Management System
  • SCADA data acquisition and monitoring
  • APC automatic power generation control
  • network application analysis network application analysis
  • the energy management system is complex in structure and rich in functions. Its real-time database contains a large amount of data. Due to the large number of single-table records in its real-time in-memory database, data access performance is greatly reduced.
  • the present invention provides a partition storage method for a distributed real-time memory database of an energy management system, which divides a larger data table into multiple data partitions by means of database fragmentation, and stores different record data in different partitions.
  • a partition storage method for a distributed real-time memory database of an energy management system which divides a larger data table into multiple data partitions by means of database fragmentation, and stores different record data in different partitions.
  • different partitions are divided into different files for independent storage.
  • a method for partition storage of a distributed real-time memory database of an energy management system comprising the steps of:
  • Step 1 ID-number and group the data in the data table, each data record has a unique ID number and each data record is assigned a group number;
  • Step 2 Each data record is allocated to a corresponding partition storage file according to the allocated group number
  • Step 3 Create a data table ID number - partition number mapping, and create an index file
  • Step 4 Store the same partition storage file to different data nodes as needed, or store different partition storage files to the same data node.
  • the database index of each data node only includes data already existing on the node.
  • the real-time in-memory database establishes a separate partition index to store the mapping relationship between the ID of each data record in the data table to the group number and the storage location of the data record, and form a separate index file for each data table.
  • the larger data table is divided into multiple data partitions by means of database fragmentation, and different record data is stored in different partitions.
  • different partitions are separately divided into different files for independent storage.
  • FIG. 1 is a schematic diagram of a data file deployment manner in an embodiment of the present invention.
  • the partition storage method of the distributed real-time memory database of the energy management system includes the following steps:
  • Step 1 ID-number and group the data in the data table, each data record has a unique ID number and each data record is assigned a group number;
  • the present invention takes the data table device as an example, and the device table includes two fields dev_id (ID number). And dev_type (group number), as shown in Table 1:
  • Dev_id Dev_type 001 1 002 2 003 1 004 3 005 2 006 1
  • Step 2 Each data record is allocated to a corresponding partition storage file according to the allocated group number
  • dev_type is 1, the record is stored in the partition file table A_ partition 1; corresponding dev_type is 2, and the partition file is stored.
  • Table A_Partition 2; dev_type is 3, and is stored in the partition file table A_Partition 3, which corresponds to Table 2-4:
  • Step 3 Create a data table ID number - partition number mapping, create an index file, the primary key index file is the table A_ primary key in Figure 1, as shown in Table 5:
  • Step 4 Store the same partition storage file to different data nodes as needed, or store different partition storage files to the same data node. As shown in Figure 1, different partitions can be stored on different computer nodes.
  • the database index of each data node only includes data already existing on the node.
  • the data on each computer node is separately constructed with an index, and only the data of the node is included in the index.
  • the real-time in-memory database establishes a separate partition index to store the mapping relationship between the ID of each data record in the data table to the group number and the storage location of the data record, and form a separate index file for each data table.
  • the partition storage method of the distributed real-time memory database of the energy management system of the present invention is combined
  • the work is implemented on the self-developed real-time library of the application layer, and does not depend on the specific operating system, and is applicable to various operating systems.
  • This method guarantees portability and can be safely and stably run on the operating system platforms of IBM AIX, Sun Solaris, Alpha Tru64, HPUX, Linux, Windows, etc. with the real-time database system.
  • the larger data table is divided into multiple data partitions by means of database fragmentation, and different record data is stored in different partitions.
  • different partitions are separately divided into different files for independent storage.

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  • Theoretical Computer Science (AREA)
  • Databases & Information Systems (AREA)
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Abstract

A method of partitioning and storing a real-time distributed database in memory in an energy management system is characterized by the following steps: Step 1., numbering data in a table using an identifier number and grouping the same, wherein each data entry has a unique ID number and is assigned with a group number; Step 2., assigning, according to the assigned group number, each data entry to a corresponding partitioned file; Step 3: establishing mapping between a table ID number and a partition number, and creating an index file; and Step 4: storing according to requirements a partitioned file to different data nodes, or storing different partitioned files to a same data node. The embodiment stores different data records to different partitions, and independently stores different partitions as different files for ensuring concurrent access of the partitioned data.

Description

能量管理系统分布式实时内存数据库的分区存储方法Partition storage method for distributed real-time memory database of energy management system 技术领域Technical field
本发明涉及一种能量管理系统分布式实时内存数据库的分区存储方法。The invention relates to a partition storage method for a distributed real-time memory database of an energy management system.
背景技术Background technique
能量管理系统(EMS)是现代电网调度自动化系统(含硬、软件)的总称，其主要功能由基础功能和应用功能两个部分组成。基础功能包括：计算机、操作系统和EMS支撑系统，而应用功能包括：数据采集与监视(SCADA)、自动发电控制(AGC)与计划、网络应用分析等。Energy Management System (EMS) is a general term for modern power grid dispatching automation systems (including hardware and software). Its main functions are composed of basic functions and application functions. The basic functions include: computer, operating system and EMS support system, and application functions include: data acquisition and monitoring (SCADA), automatic power generation control (AGC) and planning, network application analysis.
能量管理系统结构复杂、功能丰富，其实时数据库包含大量数据，由于其实时内存数据库中，单表记录数过大，导致数据访问性能大大降低。The energy management system is complex in structure and rich in functions. Its real-time database contains a large amount of data. Due to the large number of single-table records in its real-time in-memory database, data access performance is greatly reduced.
发明内容Summary of the invention
针对上述问题，本发明提供一种能量管理系统分布式实时内存数据库的分区存储方法，通过数据库分片的方式将较大的数据表分成多个数据分区，将不同的记录数据存储于不同的分区中，同时为了保证分区数据可以并发访问，将不同的分区进行分成不同文件独立存储。In view of the above problems, the present invention provides a partition storage method for a distributed real-time memory database of an energy management system, which divides a larger data table into multiple data partitions by means of database fragmentation, and stores different record data in different partitions. In order to ensure that the partitioned data can be accessed concurrently, different partitions are divided into different files for independent storage.
为实现上述技术目的，达到上述技术效果，本发明通过以下技术方案实现：In order to achieve the above technical effects and achieve the above technical effects, the present invention is achieved by the following technical solutions:
能量管理系统分布式实时内存数据库的分区存储方法，其特征在于，包括如下步骤：A method for partition storage of a distributed real-time memory database of an energy management system, comprising the steps of:
步骤1、将数据表中的数据进行ID编号和分组，每条数据记录拥有唯一的ID编号且每条数据记录被分配一个分组编号；Step 1. ID-number and group the data in the data table, each data record has a unique ID number and each data record is assigned a group number;
步骤2、每条数据记录根据分配的分组编号分配到对应的分区存储文件中；Step 2: Each data record is allocated to a corresponding partition storage file according to the allocated group number;
步骤3、建立数据表ID编号-分区编号映射，创建索引文件； Step 3: Create a data table ID number - partition number mapping, and create an index file;
步骤4、根据需要将同一个分区存储文件存储到不同的数据节点，或将不同的分区存储文件存储到同一个数据节点。Step 4. Store the same partition storage file to different data nodes as needed, or store different partition storage files to the same data node.
优选，每个数据节点的数据库索引只包括本节点上已有的数据。Preferably, the database index of each data node only includes data already existing on the node.
优选，实时内存数据库建立单独的分区索引存储数据表中每条数据记录的ID到数据记录所属分组编号及存储位置的映射关系，并为每张数据表形成独立的索引文件。Preferably, the real-time in-memory database establishes a separate partition index to store the mapping relationship between the ID of each data record in the data table to the group number and the storage location of the data record, and form a separate index file for each data table.
本发明的有益效果是：The beneficial effects of the invention are:
第一、实现实时数据库中数据分区的独立存储；First, realize independent storage of data partitions in the real-time database;
第二、提供分片数据的并发读写；Second, provide concurrent reading and writing of fragmented data;
第三、数据的可移植性强。Third, the data is highly portable.
通过数据库分片的方式将较大的数据表分成多个数据分区，将不同的记录数据存储于不同的分区中，同时为了保证分区数据可以并发访问，将不同的分区进行分成不同文件独立存储。The larger data table is divided into multiple data partitions by means of database fragmentation, and different record data is stored in different partitions. In order to ensure that the partitioned data can be accessed concurrently, different partitions are separately divided into different files for independent storage.
附图说明DRAWINGS
图1是本发明实施例中数据文件部署方式的示意图。FIG. 1 is a schematic diagram of a data file deployment manner in an embodiment of the present invention.
具体实施方式detailed description
下面结合附图和具体的实施例对本发明技术方案作进一步的详细描述，以使本领域的技术人员可以更好的理解本发明并能予以实施，但所举实施例不作为对本发明的限定。The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can understand the invention.
能量管理系统分布式实时内存数据库的分区存储方法，包括如下步骤：The partition storage method of the distributed real-time memory database of the energy management system includes the following steps:
步骤1、将数据表中的数据进行ID编号和分组，每条数据记录拥有唯一的ID编号且每条数据记录被分配一个分组编号；Step 1. ID-number and group the data in the data table, each data record has a unique ID number and each data record is assigned a group number;
本发明以数据表device为例，device表包含2个字段dev_id(ID编号)， 和dev_type(分组编号)，如表1所示：The present invention takes the data table device as an example, and the device table includes two fields dev_id (ID number). And dev_type (group number), as shown in Table 1:
表1Table 1
dev_idDev_id dev_typeDev_type
001001 11
002002 22
003003 11
004004 33
005005 22
006006 11
步骤2、每条数据记录根据分配的分组编号分配到对应的分区存储文件中；Step 2: Each data record is allocated to a corresponding partition storage file according to the allocated group number;
数据表按照dev_type进行分区后变为3个分区，并将分区数据写入到对应的分区文件：对应dev_type为1，记录存入分区文件表A_分区1；对应dev_type为2，存入分区文件表A_分区2；dev_type为3，存入分区文件表A_分区3，分别对应为表2-4：After the data table is partitioned according to dev_type, it becomes 3 partitions, and the partition data is written to the corresponding partition file: corresponding dev_type is 1, the record is stored in the partition file table A_ partition 1; corresponding dev_type is 2, and the partition file is stored. Table A_Partition 2; dev_type is 3, and is stored in the partition file table A_Partition 3, which corresponds to Table 2-4:
表2 分区文件表A_分区1Table 2 partition file table A_ partition 1
dev_idDev_id dev_typeDev_type
001001 11
003003 11
006006 11
表3 分区文件表A_分区2Table 3 partition file table A_ partition 2
dev_idDev_id dev_typeDev_type
002002 22
005005 22
表4 分区文件表A_分区3Table 4 partition file table A_ partition 3
dev_idDev_id dev_typeDev_type
004004 33
007007 33
步骤3、建立数据表ID编号-分区编号映射，创建索引文件，主键索引文件即图1中的表A_主键，如表5所示：Step 3: Create a data table ID number - partition number mapping, create an index file, the primary key index file is the table A_ primary key in Figure 1, as shown in Table 5:
表5 主键索引文件表A_主键Table 5 Primary Key Index File Table A_ Primary Key
dev_idDev_id 分区编号Partition number 存储位置storage location
001001 11 11
002002 22 11
003003 11 22
004004 33 11
005005 22 22
006006 11 33
007007 33 22
步骤4、根据需要将同一个分区存储文件存储到不同的数据节点，或将不同的分区存储文件存储到同一个数据节点，如图1所示，不同分区可存储在不同的计算机节点上。Step 4. Store the same partition storage file to different data nodes as needed, or store different partition storage files to the same data node. As shown in Figure 1, different partitions can be stored on different computer nodes.
优选，每个数据节点的数据库索引只包括本节点上已有的数据。每个计算机节点上的数据单独构造索引，索引中只包含本节点的数据。Preferably, the database index of each data node only includes data already existing on the node. The data on each computer node is separately constructed with an index, and only the data of the node is included in the index.
优选，实时内存数据库建立单独的分区索引存储数据表中每条数据记录的ID到数据记录所属分组编号及存储位置的映射关系，并为每张数据表形成独立的索引文件。Preferably, the real-time in-memory database establishes a separate partition index to store the mapping relationship between the ID of each data record in the data table to the group number and the storage location of the data record, and form a separate index file for each data table.
本发明涉及的能量管理系统分布式实时内存数据库的分区存储方法是结合 工作在应用层的自主开发的实时库上实现，不依赖于具体的操作系统，适用于各种操作系统。本方法保证了可移植性，能够随着实时数据库系统安全、稳定地运行在IBM AIX、Sun Solaris、Alpha Tru64、HPUX、Linux、Windows等操作系统平台上。The partition storage method of the distributed real-time memory database of the energy management system of the present invention is combined The work is implemented on the self-developed real-time library of the application layer, and does not depend on the specific operating system, and is applicable to various operating systems. This method guarantees portability and can be safely and stably run on the operating system platforms of IBM AIX, Sun Solaris, Alpha Tru64, HPUX, Linux, Windows, etc. with the real-time database system.
本发明的有益效果是：The beneficial effects of the invention are:
第一、实现实时数据库中数据分区的独立存储；First, realize independent storage of data partitions in the real-time database;
第二、提供分片数据的并发读写；Second, provide concurrent reading and writing of fragmented data;
第三、数据的可移植性强。Third, the data is highly portable.
通过数据库分片的方式将较大的数据表分成多个数据分区，将不同的记录数据存储于不同的分区中，同时为了保证分区数据可以并发访问，将不同的分区进行分成不同文件独立存储。The larger data table is divided into multiple data partitions by means of database fragmentation, and different record data is stored in different partitions. In order to ensure that the partitioned data can be accessed concurrently, different partitions are separately divided into different files for independent storage.
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或者等效流程变换，或者直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。 The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims (3)

  1. 能量管理系统分布式实时内存数据库的分区存储方法，其特征在于，包括如下步骤：A method for partition storage of a distributed real-time memory database of an energy management system, comprising the steps of:
    步骤1、将数据表中的数据进行ID编号和分组，每条数据记录拥有唯一的ID编号且每条数据记录被分配一个分组编号；Step 1. ID-number and group the data in the data table, each data record has a unique ID number and each data record is assigned a group number;
    步骤2、每条数据记录根据分配的分组编号分配到对应的分区存储文件中；Step 2: Each data record is allocated to a corresponding partition storage file according to the allocated group number;
    步骤3、建立数据表ID编号-分区编号映射，创建索引文件；Step 3: Create a data table ID number - partition number mapping, and create an index file;
    步骤4、根据需要将同一个分区存储文件存储到不同的数据节点，或将不同的分区存储文件存储到同一个数据节点。Step 4. Store the same partition storage file to different data nodes as needed, or store different partition storage files to the same data node.
  2. 根据权利要求1所述的能量管理系统分布式实时内存数据库的分区存储方法，其特征在于，每个数据节点的数据库索引只包括本节点上已有的数据。The method for partition storage of a distributed real-time in-memory database of an energy management system according to claim 1, wherein the database index of each data node includes only data existing on the node.
  3. 根据权利要求1所述的能量管理系统分布式实时内存数据库的分区存储方法，其特征在于，实时内存数据库建立单独的分区索引存储数据表中每条数据记录的ID到数据记录所属分组编号及存储位置的映射关系，并为每张数据表形成独立的索引文件。 The method for partition storage of a distributed real-time in-memory database of an energy management system according to claim 1, wherein the real-time in-memory database establishes a separate partition index to store the ID of each data record in the data table to the group number and storage of the data record. The mapping of locations and the formation of separate index files for each data table.
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