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remove only configuration. Because MongoDB is started, the configuration is written to DB, Master is configured in the slaves table of local db, and slave is configured in the sources table of local db. If you change the conf file individually, the direct reboot fails, and the log shows the configuration conflict in db. If you modify local DB directly, the modifications will be overwritten quickly.5. Methods of operationCancel slave configuration reb
In the design of the database, we often use the GUID or int to make the key, according to the knowledge has always felt the INT master key efficiency is high, but did not do careful testing can not Explain the truth. I happened to be in the process of optimizing the database today, so I did some testing. Test environment: Desktop computer Pentiun (R) 4 Cpu 3.0
. First, check the structure of the table: Mysql> desc kn_chongzhi; + ------------- + bytes + ------ + ----- + --------- + ---------------- + | Field | Type | Null | Key | Default | Extra | + ------------- + --------------- + ------ + ----- + ----------- + ---------------- + | id | int (10) | NO | PRI | NULL | auto_increment | aa | varchar (32) | NO | MUL | NULL | bizOfferId | varchar (32) | NO | NULL | number | varchar (20) | NO | MUL | NULL | cc |
The primary key of Table A acts as a foreign key in Table B. Who is the primary table and who is the subtable? A as the primary tableB is the slave table I personally think: A foreign key is a type of constraint. There is no master-slave relationship, and only the reference relationship exists, such as the Department t
MYSQL master-slave replication builds the entire process-explore key parameters that cannot be synchronized in real time, mysql master-slave Reprinted please indicate the source: http://blog.csdn.net/guoyjoe/article/details/45873859 1. master database operations 1. Full Database Export Mysqldump-h192.168.1.6 -- all-da
Insert a record to the master table, retrieve the primary key of the record of the master table, and assign values to multiple records from the table. Public void createworkordgrid (pp_workord_hd headobject, list Insert a record to the master table, retrieve the primary key
The following figure: 1. The Server Master key (Service master key) is at the top of the hierarchy and is created automatically when SQL Server is installed to encrypt system data, linked server logins, and database master keys. The first time a service
Tags: style blog http color io os using AR forEncryption in SQL Server is handled in a hierarchical form to provide multiple levels of security. SQL Server contains two key types that are used to encrypt data. Such as:1. Server Master Secret (Service master key), located at the top of the hierarchy and created automati
Known problems: Anything related to encryption involves the sqlserver server master key. Therefore, the issue of "error 15466 during decryption" is involved. You can reset the master key of the server. Note: This operation is computation-intensive !!!! Encrypted data may be lost! Syntax
) #./Configure-prefix =/usr/local/named-enable-threads# Make make install !) # Ls/usr/local/named/(view the directory after installation)Bin etc include lib man sbin var first generates a control key for master-slave data encryption.#/Usr/local/named/sbin/rndc-confgen-a-c bkjia. key-k bkjia The generated/bkjia. key is
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Source: Nanshan Real-time communication on the definition and cultivation of master Nanshan Instant Messaging believes that once the initial stage has been done, the above mentioned things, then a person is basically into the business, the next goal is very simple, to be a master in the selected direction. Master means professional, and in the era of infinite ref
[MySQL FAQ] Series-Why the InnoDB table is recommended to use the self-increment column master keyHttp://imysql.com/2014/09/14/mysql-faq-why-innodb-table-using-autoinc-int-as-pk.shtmlLet's start by understanding some of the key features of the InnoDB engine table: InnoDB engine table is an index organization table (IOT) based on the B + tree; Each table needs to have a clustered index (clustere
-------------------Quote begin------------------------3. If you decide so you can skip the next statement from the master, issue the following statements:mysql> SET GLOBAL S Ql_slave_skip_counter = n; Mysql> START SLAVE; The value of n should be 1 if the next statement from the master does not with Auto_increment or last_insert_id (). Otherwise, the value should be 2. The reason for using a value of of 2 fo
Brush Machine Master Mobile version of the Brush Machine Master team launched a set of key brush machine and root, management of mobile phones and one of the brush machine tools, brush Machine Master Mobile version of the recent upgrade to 2.0.5 version, brush Machine Master
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Build a double master, suddenly think of if the table set the self-increment primary key, when the business at the same time to insert a pair of data in a double library, what is the situation like?For example, a table data on the main library A and the main library B is: ' Ninhao '. When the business writes data at the same time, the data of the library A is ' new Nihao '? What is the data on the main libr
Https SSL/TLS PreMaster/Master Secret (Key) computing Many people are confused about how the PreMaster/Master Secret (Key) is calculated when studying Https SSL/TLS. Recently, by looking at other materials and openssl source code, summarize the computing process of the PreMaster/M
Label:A few days ago, found hanging from the library, the specific error message is as follows: Analysis Ideas 1. Because I am using selective replication, it is only replicated for the following libraries: Card,upay,deal,monitor,collect. Therefore, it is unlikely that the operation for Sas_basic can be copied to the slave library. 2. The entire architecture is 1 Master 2 from, and is selective replication, the above from the library is directly cop
Most of the online solutions are under the command line. I use egit, so I need to add the following sentence to the configuration file in eclipse (my version is Kepler. Window-> preference-> Team-> Git-> Configuration-> repository settings-> select your repository and click Open [Branch "master"]Remote = OriginMerge = refs/heads/Master Second 1. Find the config file in the local project directory (my fil
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