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  Case of power grid data security

  Background Overview 1. Demand analysis the current system status of the power grid is as follows: (1) it is mainly divided into two computer rooms: the production environment and the test environment (prefecture and city), and the two computer rooms are physically isolated, but there are some springboard mechanisms at present, from the test environment computer room, we can get some information about the existence of fortress machines to achieve the purpose of obtaining data.

  2022-06-01 05:37:39 Views: 215
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  Implementation of hash Lookup Table in MYSQL INNODB

  Original error please point out: version: 5.7.14 source position is hash0hash.h hash0hash.cc as a data structure with optimal time complexity O (1), but worst time complex alignment O (n), but in good design ha

  2022-06-01 05:37:34 Views: 211
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  Uncover the secret of tens of billions of requests for highly available Redis (codis) distributed clusters

  Abstract: as the king of kv database in noSql, redis is favored by developers because of its high performance, low latency and rich data structure, but because redis is limited in horizontal scalability, how to achieve horizontal expansion and non-intrusive business is a lot of use of redis.

  2022-06-01 05:37:30 Views: 299
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  [ASM] Oracle ASM + 11gR2 + RHEL6.5 installation

  [ASM] Oracle ASM + 11gR2 + RHEL6.5 installation 1.1 introduction 1.1.1 ASMLib1.1.2 what is udev1.1.3 Why ASMLIB and why not1.2

  2022-06-01 05:37:18 Views: 251
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  The relationship between interactive_timeout and wait_timeout

  Interactive_timeout = 28800wait_timeout = 2880 hours both defaults to 28800s, that is, 8 hours; interactive_timeout means that mysql is shutting down

  2022-06-01 05:37:18 Views: 221
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  The cliff style of Yingke's market capitalization

  Not long ago, Yingke, the first live broadcast stock of Hong Kong stocks, released its financial results for the first half of 2019, and the data results were not satisfactory. Investors who heard the wind seemed to have lost patience in the face of Yingke's first loss, with shares falling 4.39% on Aug. 27. It finally closed at 1.09 yuan per share, while

  2022-06-01 05:37:14 Views: 271
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  Mysql character set viewing and setting

  The character set problem of MySQL is mainly two concepts, one is Character Sets, the other is Collations, the former is character content and coding, and the latter is some rules for comparing the former. These two parameter sets can be used in a database instance or a single database

  2022-06-01 05:37:14 Views: 264
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  How MYSQL INNODB calculates the maximum capacity and number of rows of B + tree tables

  Consider the table structure as follows: create table testzh (id int primary key auto_increment, id2 int,id3 int); insert data: delimiter / / cre

  2022-06-01 05:37:12 Views: 254
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  Sketch for mac (powerful vector drawing design software) 65 Chinese active version

  Powerful vector drawing software: Sketch 64 has been completely new online! Sketch for mac Chinese version is an innovative vector drawing software with simple design, palettes, panels, menus, windows and controls and powerful vector drawing and text tools, including perfect

  2022-06-01 05:37:01 Views: 236
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  Two options in SQL Server query Optimization

  In this article, we will introduce two concepts available in SQL Server, which are noteworthy techniques when using SQL Server. 1. OPTI has been added in OPTIMIZE FOR UnknownSQL Server 2005 version.

  2022-06-01 05:37:01 Views: 213
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  PostgreSQL DBA (96)-System Conf (client_min_messages)

  PostgreSQL provides the parameter client_min_messages to control the level of messages returned to the customer. The size of messages returned by different levels varies, and the default is NOTICE. In general, if the client executes SQL statements infrequently

  2022-06-01 05:36:56 Views: 283
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  Linux dynamically modifies max user processes limits

  The limits parameter of the mysql process can be used as follows: echo-n 'Max processes=SOFT_LIMITS:HARD_LIMITS' > / proc/ `pidof mysqld` / lim

  2022-06-01 05:36:56 Views: 274
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  Controlfile_header of oracle

  SYS@hyyk > select table_name from dict where table_name like'% CONTROL%'; TABLE_NAME-

  2022-06-01 05:36:55 Views: 268
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  PostgreSQL Literacy course

  Download PostgreSQL from this link. When installing, remember the initial password you set for user postgres and the default port number 5432, which you need to use later. Install the graphical management UI pgadmin, which can be obtained from this link. Installation completed

  2022-06-01 05:36:55 Views: 253
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  The first instance cannot be started after the second database instance is created on 12c

  12.2.0.1 is installed on Windows 10, and the first instance, orcl, is installed as a non-empty database. After normal use, shut down the instance. Create a second database instance, zlcdb, and create a container database. After you can use it normally, close the instance. Start again

  2022-06-01 05:36:50 Views: 211
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  From Oracle to PostgreSQL: the most complete control file

  Original: from Oracle to PostgreSQL: most complete control file (top) https://www.enmotech.com/web/detail/1/770/1.html from Oracle to PostgreSQL: the most

  2022-06-01 05:36:50 Views: 284
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  Mysqld_multi password verification failed after 5.6.25

  Reason: As of MySQL 5.6.25, my_print_defaults masks passwords by default. Use this option to display pass

  2022-06-01 05:36:49 Views: 302
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  Mysql error ERROR 1093

  Today, in an attempt to update a table with a subquery, the following error was received: ERROR 1093 (HY000): You can't specify target table'vmemorymembermembers in for upd

  2022-06-01 05:36:49 Views: 230
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  MySQL: a failure caused by improper setting of innodb_thread_concurrency

  Source version: 5.7.22 1. Welcome to follow my "in-depth understanding of MySQL Master and Slave principle 32", as follows: if the picture can not be displayed, please see the following link: https://www.jianshu.com/p/d636215d767

  2022-06-01 05:36:49 Views: 259
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  Static and dynamic registration of Oracle snooping

  Static registration: dynamic registration by parsing listene.ora files: dynamic registration from the PMON process to listening. In the case of no listener.ora configuration file, if the monitoring is started, the monitoring is dynamic registration. Listeners created with graphical netca are also available by default

  2022-06-01 05:36:49 Views: 221