Database Administrator

Innobackupex-Based Incremental backup and recovery MySQL Hot Backup (physical backup) can be used with full backup and Incremental backup to reduce the I/O pressure on the database and the occupation of system resources. Incremental backup is based

Mysqldump back up and restore a MySQL database Brief Introduction: The mysqldump command can be used to export all specified databases and tables as SQL scripts, which can be used on Mysql in different sections. For example, to upgrade the Mysql

Implementation of MySQL read/write splitting in RHEL6.5 I. Requirements 1. Configure two MySQL servers and one proxy server to implement read/write splitting of the MySQL proxy. 2. You only need to access the MySQL proxy server. The actual SQL query

Servlet update execution error ORA-12518 ORA-12518: TNS: listener cocould not hand off client connection This error is generally tested for database concurrency by multiple users, The backend executes an update using the servlet method, but the

Formula for calculating the average transaction response time in the Oracle database, and the oracle Response Time Calculation Formula of average transaction response time in Oracle Database   Note: This formula is taken from: eel , p316   Top 5

Oracle Database for the Data Type of database fields, oracle Data TypeModify the Data Type of Oracle Data Columns Method 1: // Create the same temporary table Create table T_BUSINESS_MODEL_TEMP as select * from T_BUSINESS_MODEL where 1 = 2;//

Mysql performance optimization suggestions, Mysql Performance Optimization For Mysql performance optimization, refer to [1], [2], and [3]. Some of the articles that have been used and have relatively good results are as follows:1. Practical

Innobackupex-Based Incremental backup and recovery MySQL Hot Backup (physical backup) can be used with full backup and Incremental backup to reduce the I/O pressure on the database and the occupation of system resources. Incremental backup is based

Oracle Installation tutorial, oracle Installation tutorial The installation of Oracle reminds me of the time when I installed SQL server last year. I 'd like to record the installation and hope to help some people. First of all, I will not talk much

SQL statement concise tutorial for linux --- CREATE VIEW, concise tutorial --- create A View can be considered as a virtual table. Unlike a table, a table stores actual data, while a table is built on a table architecture and does not actually store

An error is reported when a mysql-mmm environment is set up, and a mysql-mmm environment is reported. The following information is displayed when mmm_contorl show is executed after monitor is started. ERROR: Can't connect to monitor daemon!

Search for mongodb process numbers and mongodb process numbers The mongodb PID must be called for monitoring purposes, Method 1: Add pidfilepath =/var/run/mongodb. pid to the interaction file. After mongodb is restarted, Note: The PID file

Alex's Hadoop rookie Tutorial: 9th Sqoop1 exporting mysql and hadoopsqoop1 from Hbase or Hive Today we will talk about how to use sqoop to export Hbase or Hive stuff to mysql. But I want to tell you in advance Currently, sqoop cannot export data

Data migration methods, steps, and experiencesData migration methods, steps, and experiencesIn projects, we often encounter historical data migration problems after the system is completely replaced, to show respect for the historical work of the

SQLite summary, sqliteZookeeper Generally, the static data type is fixed, while SQLite uses the dynamic data type, which is automatically determined based on the stored value. SQLite has the following five data types: 1. NULL: NULL.2. INTEGER: A

[Translated from mos] What is the difference between basic table compression and advanced compression in oracle databases?Differences between basic table compression and advanced compression,Extracted from the mos Article Difference Between Basic

SQL Server Character Processing (LastIndexOf usage), STUFF, CHARINDEX, REVERSE, LEN, charindexDECLARE @ s VARCHAR (100)SET @ s = 'r1-1-1 'Get the number after the last "-"Select REVERSE (@ s) Return Value: 1-1-1R reversed characters select LEN (@ s)

Solution to slow query caused by high water level line and water level line As we all know, with the continuous DML operations on table records, the high watermark line (HWM) of the table will be continuously improved. After the DELETE operation,

MongoDB (3)-add, delete, modify, and query operations MongoDB, as a non-relational database, is very different from the addition, deletion, modification, and query of traditional databases. Here we only outline the knowledge points. In actual use,

Mysql optimization: a deep understanding of the storage engine, index optimization, mysql Index Compare the storage methods of the two storage engines in the database: MyIsam: If you observe carefully, you will find that the database using this