


Talk about the current situation, prospects and opportunities of CentOS6.5_x64
Environment: CentOS6.5_x64Python version: 2.6 Use pyinstaller to package pyinstaller can package the python program into a binary file. The packaged file can also be executed in an environment without python (but there must be relevant underlying libc related so files). pyinstaller supports packaging python programs into a single file. All it does is convert text into binary, which does not speed up python. On the contrary, it will affect the running speed of the packaged program. Install pyinstaller through pip: pip install pyinstaller through source code: python setup.py install packager plus the -F parameter can package the program into a separate file: pyinstaller -F test1.py Use virtualenv packaging virtualenv is used to package an application Create an "isolated" Python
1. Detailed introduction to program packaging
Introduction: Environment: CentOS6.5_x64Python version: 2.6 Use pyinstaller to package pyinstaller can package python programs into binary files. The packaged files can also be executed in environments without python (but there must be relevant underlying libc related so files). pyinstaller supports packaging python programs into a single file. All it does is convert text into binary, which does not speed up python. On the contrary, it will affect the running speed of the packaged program. Install p...
2. MySQL-Detailed explanation of dual-machine HA based on Keepalived (picture and text)
Introduction: 1. Environment description: OS: CentOS6.5_X64 MASTER: 192.168.0.202 BACKUP: 192.168.0.203 VIP: 192.168.0.2042, configure two Mysql masters Synchronization Regarding the installation of MySQL, you can also refer to "MySQL - CentOS6.5 Compile and Install MySQL5.6.16". Master-master synchronization is based on master-slave synchronization and the slave server is configured as
3. Sample code for MySQL-CentOS6.5_x64 installation and configuration drbd8.4.2
# #Introduction: 1. Host resources: NameIP configuration remarks Master192.168.0.152sda/10G,sdb/10G; Slave192.168.0.153sda/10G,sdb/10G; *************** *******************************DRBD download address: htt
4. MySQL——CentOS6.5_x64 installation configuration drbd8.4.2
5.
PHP7+Nginx configuration and installation tutorial detailed explanation php7 mysql php7 installation tutorial ubuntu php
Introduction: nginx, php7: Detailed explanation of the configuration and installation tutorial of PHP7+Nginx: Below, the editor of this site will share with you the configuration and installation tutorial of PHP7+Nginx for your benefit. For reference, please forgive me if this article is not well written. System environment: centos6.5 x64 software version: nginx-1.10.0 php-7.0.6 Install NginxNginx official website: http://nginx.org/ First install some components that the compilation depends on. Copy the code as follows: yum install pcre pcre-devel openssl openssl-devel -y##6.
Keepalived+Mysql for MySQL high availability##Introduction: Environment description: OS: CentOS6.5_X64MASTER: 192.168.0.202BACKUP: 192.168.0.203VIP: 192.168.0.2041. Configure two Mysql master master synchronization [root@master~]#yuminstallmysql -servermy
##7. Installation and configuration of MongoDB database under CentOS 6.5_X64
Introduction: Linux operating system: CentOS6.5_X64IP address: 192.168.1.12 Purpose: Install and configure MongoDB database Specific operations: 1. Close SElinux, configure firewall 1. vi /
8. CentOS 6.5_x64 Install Oracle 11g R2
##Introduction: Installation environment: Operation System: CentOS6.5_x64 Desktop host name: Oracledb Memory: 1G (official minimum requirement 1G) Hard disk: 40G (4.29G and 1.7G required for enterprise version installation
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Stored procedures are precompiled SQL statements in MySQL for improving performance and simplifying complex operations. 1. Improve performance: After the first compilation, subsequent calls do not need to be recompiled. 2. Improve security: Restrict data table access through permission control. 3. Simplify complex operations: combine multiple SQL statements to simplify application layer logic.

The working principle of MySQL query cache is to store the results of SELECT query, and when the same query is executed again, the cached results are directly returned. 1) Query cache improves database reading performance and finds cached results through hash values. 2) Simple configuration, set query_cache_type and query_cache_size in MySQL configuration file. 3) Use the SQL_NO_CACHE keyword to disable the cache of specific queries. 4) In high-frequency update environments, query cache may cause performance bottlenecks and needs to be optimized for use through monitoring and adjustment of parameters.

The reasons why MySQL is widely used in various projects include: 1. High performance and scalability, supporting multiple storage engines; 2. Easy to use and maintain, simple configuration and rich tools; 3. Rich ecosystem, attracting a large number of community and third-party tool support; 4. Cross-platform support, suitable for multiple operating systems.

The steps for upgrading MySQL database include: 1. Backup the database, 2. Stop the current MySQL service, 3. Install the new version of MySQL, 4. Start the new version of MySQL service, 5. Recover the database. Compatibility issues are required during the upgrade process, and advanced tools such as PerconaToolkit can be used for testing and optimization.

MySQL backup policies include logical backup, physical backup, incremental backup, replication-based backup, and cloud backup. 1. Logical backup uses mysqldump to export database structure and data, which is suitable for small databases and version migrations. 2. Physical backups are fast and comprehensive by copying data files, but require database consistency. 3. Incremental backup uses binary logging to record changes, which is suitable for large databases. 4. Replication-based backup reduces the impact on the production system by backing up from the server. 5. Cloud backups such as AmazonRDS provide automation solutions, but costs and control need to be considered. When selecting a policy, database size, downtime tolerance, recovery time, and recovery point goals should be considered.

MySQLclusteringenhancesdatabaserobustnessandscalabilitybydistributingdataacrossmultiplenodes.ItusestheNDBenginefordatareplicationandfaulttolerance,ensuringhighavailability.Setupinvolvesconfiguringmanagement,data,andSQLnodes,withcarefulmonitoringandpe

Optimizing database schema design in MySQL can improve performance through the following steps: 1. Index optimization: Create indexes on common query columns, balancing the overhead of query and inserting updates. 2. Table structure optimization: Reduce data redundancy through normalization or anti-normalization and improve access efficiency. 3. Data type selection: Use appropriate data types, such as INT instead of VARCHAR, to reduce storage space. 4. Partitioning and sub-table: For large data volumes, use partitioning and sub-table to disperse data to improve query and maintenance efficiency.

TooptimizeMySQLperformance,followthesesteps:1)Implementproperindexingtospeedupqueries,2)UseEXPLAINtoanalyzeandoptimizequeryperformance,3)Adjustserverconfigurationsettingslikeinnodb_buffer_pool_sizeandmax_connections,4)Usepartitioningforlargetablestoi


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