Create an instance in MongoDB master-slave mode

Create an instance in MongoDB master-slave mode For databases, the master-slave architecture mode is often used to ensure data security and high availability. for Mongodb, this article describes how to build a simple Mongodb master-slave

MongoDB replica set implementation and read/write splitting

MongoDB replica set implementation and read/write splitting In the previous article "building an instance in MongoDB master-slave mode", we briefly introduced how to build a master-slave Mongodb server environment. However, Mongodb does not

Oracle archiving logs

Oracle archiving logs Archive Log is a non-active backup of redo logs. archive logs can be used to keep all redo history records. When the database is in ARCHIVELOG mode and the log is switched, the background process ARCH will save the redo log

C-Basic redis cache access

C-Basic redis cache access Introduction Let's talk about redis installation. The environment used here is. Linux version 4.4.0-22-generic (buildd@lgw01-41) (gcc version 5.3.1 20160413 (Ubuntu 5.3.1-14ubuntu2) ) #40-Ubuntu SMP Thu May 12 22:03:46 UTC

Fast Switchover in Data Guard, some suggestions for Failover

Fast Switchover in Data Guard, some suggestions for Failover In fact, Failover and Switchover are both a headache and a key process for everyone to deal with disasters. Assume that you are sleeping in the middle of the night, and you are awakened by

MySQL getting started

MySQL getting started Operating System: CentOS 6.7MySQL version: 5.6.30 1. Preparations 2. System Configuration 3. CMake compilation Configuration 4. make & make install 5. Subsequent configuration and Testing Reference 1. Preparations First,

Installing Oracle 11gR2 in RHEL 6.5

Installing Oracle 11gR2 in RHEL 6.5 Record the process of installing Oracle 11gR2 in RHEL 6.5, and hope to help you. 1. Disable selinux and use vi/etc/selinux/config Selinux = disabled 2. Use yum to install rpm Yum-y install compat-db compat-db42

MySQL table sharding auto-incremental ID Solution

MySQL table sharding auto-incremental ID Solution After we perform the table sharding operation on MySQL, we cannot rely on the automatic increment of MySQL to generate a unique ID, because the data has been distributed to multiple tables. Avoid

Master-slave database settings for Yii2

Master-slave database settings for Yii2 As the project grows, the master and slave databases are still indispensable. Using the Yii framework for development, how do I set the master and slave databases? It is actually very simple. First, modify the

MongoDB replica set node role introduction and election process analysis

MongoDB replica set node role introduction and election process analysis A replica set ReplicaSet is generally composed of a group of mongod instances, which work together to provide highly available database access services. Different Nodes in the

The Oracle Database verifies whether the imported metadata of IMP overwrites the historical table data.

The Oracle Database verifies whether the imported metadata of IMP overwrites the historical table data. Scenario: When imp imports data, the final trigger reports an error and exits without importing stored procedures, triggers, and functions.Now

MySQL database migration

MySQL database migration MySQL database migration (direct migration of data files) In late October this year, the company's servers needed to be migrated, which involved MySQL database migration. Check the MySQL data file size, which is close to 60

Detailed description of mysqlbinlog Based on Log Recovery

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Configure MySQL Master-Slave replication (Master-Slave) on CentOS)

Configure MySQL Master-Slave replication (Master-Slave) on CentOS) The previous article introduced the installation of MySQL without compiling, which is really convenient. Now let's take a look at how to configure MySQL master-slave replication. For

How to install MySQL without compilation on centos

How to install MySQL without compilation on centos MySQL without compilation is very convenient and saves a lot of time. I am using MySQL-x86_64. The next step is the installation process in CentOS6.5. # Install dependency packagesYum install-y

Use Redis extension in Yii2

Use Redis extension in Yii2 Redis is a good Nosql database. Its advantage over Memcached is that it can persist data. To use Redis in Yii2, you must first expand Redis. You can add redis in composer. json. "require": { "php": ">=5.4.0",

Recovery of RMAN data from different machines is incomplete

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Oracle Partition Table online redefinition field not null

Oracle Partition Table online redefinition field not null Oracle uses DBMS_REDEFINITION to redefine a table online. It synchronizes data to an intermediate table in the new structure based on the materialized view, and then implements it by renaming

Impact of the resource role on the quota of the quota tablespace

Impact of the resource role on the quota of the quota tablespace Two days ago, I saw a brother in the Forum saying that the user set the table space's quota, but the data volume that exceeds the quota can still be inserted into the tablespace. I

Default MySQL test Database Permissions

Default MySQL test Database Permissions By default, the mysql. db table contains rows that allow any user to access databases starting with "test" and "test. The value of the User field in these rows is null, indicating matching any User. This means

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