一,系统环境CentOS 6.3 ,master A IP:192.168.1.28,master B ip:192.168.1.29。 二,安装cmake与mysql 1,安装cmake #tar xf c
一,系统环境CentOS 6.3 ,master A IP:192.168.1.28,master B ip:192.168.1.29。
二,安装cmake与mysql
1,安装cmake
#tar xf cmake-2.8.8.tar.gz
#cd cmake-2.8.8
# ./bootstrap
# gmake && gmake install
2,,安装mysql
#useradd -r mysql -s /sbin/nologin
#mkdir -p /data/mysql/{data,binlog,relaylog}
#chown mysql:mysql -R /data/mysql
# tar xf mysql-5.5.27.tar.gz
#cd mysql-5.5.27
#cmake -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci -DEXTRA_CHARSETS=all -DWITH_MYISAM_STORAGE_ENGINE=1 -DWITH_INNOBASE_STORAGE_ENGINE=1 -DENABLED_LOCAL_INFILE=1 -DMYSQL_DATADIR=/data/mysql/data -DWITH_DEBUG=0 -DSYSCONFDIR=/etc -DMYSQL_TCP_PORT=3306
#会编译不过去,提示需要安装ncurses-devel,yum -y install ncurses-devel
#rm -f CMakeCache.txe 重新执行./configure
# make && make install
#cd /usr/local/mysql
#chown -R mysql:mysql *
# cp support-files/mysql.server /etc/rc.d/init.d/mysqld
#chmod +x /etc/init.d/mysqld
#chkconfig mysqld on
# vim /etc/profile 添加PATH=$PATH:/usr/local/mysql/bin
# . /etc/profile(或者export PATH=$PATH:/usr/local/mysql/bin)
# ln -sv /usr/local/mysql/include/ /usr/include/mysql
# echo '/usr/local/mysql/lib' > /etc/ld.so.conf.d/mysql.conf 加载库文件
# ldconfig -v |grep mysql
# vim /etc/man.config 添加一行MANPATH /usr/local/mysql/man
环境已经基本Ok
# cd /usr/local/mysql
scripts/mysql_install_db --user=mysql --datadir=/data/mysql
将主服务器克隆一份,并修改IP与MAC地址,保证两台机器能够互相ping通。

MySQL'sBLOBissuitableforstoringbinarydatawithinarelationaldatabase,whileNoSQLoptionslikeMongoDB,Redis,andCassandraofferflexible,scalablesolutionsforunstructureddata.BLOBissimplerbutcanslowdownperformancewithlargedata;NoSQLprovidesbetterscalabilityand

ToaddauserinMySQL,use:CREATEUSER'username'@'host'IDENTIFIEDBY'password';Here'showtodoitsecurely:1)Choosethehostcarefullytocontrolaccess.2)SetresourcelimitswithoptionslikeMAX_QUERIES_PER_HOUR.3)Usestrong,uniquepasswords.4)EnforceSSL/TLSconnectionswith

ToavoidcommonmistakeswithstringdatatypesinMySQL,understandstringtypenuances,choosetherighttype,andmanageencodingandcollationsettingseffectively.1)UseCHARforfixed-lengthstrings,VARCHARforvariable-length,andTEXT/BLOBforlargerdata.2)Setcorrectcharacters

MySQloffersechar, Varchar, text, Anddenumforstringdata.usecharforfixed-Lengthstrings, VarcharerForvariable-Length, text forlarger text, AndenumforenforcingdataAntegritywithaetofvalues.

Optimizing MySQLBLOB requests can be done through the following strategies: 1. Reduce the frequency of BLOB query, use independent requests or delay loading; 2. Select the appropriate BLOB type (such as TINYBLOB); 3. Separate the BLOB data into separate tables; 4. Compress the BLOB data at the application layer; 5. Index the BLOB metadata. These methods can effectively improve performance by combining monitoring, caching and data sharding in actual applications.

Mastering the method of adding MySQL users is crucial for database administrators and developers because it ensures the security and access control of the database. 1) Create a new user using the CREATEUSER command, 2) Assign permissions through the GRANT command, 3) Use FLUSHPRIVILEGES to ensure permissions take effect, 4) Regularly audit and clean user accounts to maintain performance and security.

ChooseCHARforfixed-lengthdata,VARCHARforvariable-lengthdata,andTEXTforlargetextfields.1)CHARisefficientforconsistent-lengthdatalikecodes.2)VARCHARsuitsvariable-lengthdatalikenames,balancingflexibilityandperformance.3)TEXTisidealforlargetextslikeartic

Best practices for handling string data types and indexes in MySQL include: 1) Selecting the appropriate string type, such as CHAR for fixed length, VARCHAR for variable length, and TEXT for large text; 2) Be cautious in indexing, avoid over-indexing, and create indexes for common queries; 3) Use prefix indexes and full-text indexes to optimize long string searches; 4) Regularly monitor and optimize indexes to keep indexes small and efficient. Through these methods, we can balance read and write performance and improve database efficiency.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 Linux new version
SublimeText3 Linux latest version

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
