1. 在MySQL源代码目录下新建脚本 install.sh,把下面的代码添加到这个脚本中: #!/bin/bash##################################################### MySQL Server Config ###########################################################Determine to install M
1. 在MySQL源代码目录下新建脚本 install.sh,把下面的代码添加到这个脚本中:<code> #!/bin/bash ############################################ ######### MySQL Server Config ############## ############################################ #Determine to install MySQL server #"0" means do not install server programs INST_SERVER=1 #MySQL installation path INST_PATH="/usr/local/mysql" #Define the ports of MySQL installation, intput strings of #PORT with whitespace separated. #e.g. "3306 3307" means install two MySQL servers: # The first server will be installed to $INST_PATH/1 and listen 3306 port. # The second server will be installed to $INST_PATH/2 and listen 3307 port. # ... ... INST_PORTS="3306" #The management server information MGM_HOST="192.168.1.253" MGM_PORT="2200" ########################################### ######### MySQL Cluster Config ############ ########################################### #Determine to install cluster #"0" means do not install cluster programs INST_CLUSTER=1 #Define COMPUTERs in config.ini, intput strings of HostName with #whitespace separated. #The Id attribute is auto increment and start with 1. #e.g. "192.168.1.253 192.168.252" will generate the following code # [COMPUTER] # Id=1 # HostName=192.168.1.253 # [COMPUTER] # Id=2 # HostName=192.168.1.252 COMPUTERS="192.168.1.253 192.168.1.252" #Define MGMs in config.ini, intput strings of HostName with whitespace separated. #e.g. "192.168.1.253 192.168.252" will generate the following code # [MGM] # HostName=192.168.1.253 # [MGM] # HostName=192.168.1.252 MGMS="192.168.1.253" #Define DBs in config.ini, intput ids of ExecuteOnComputer with whitespace separated. #e.g. "1 2" will generate the following code # [DB] # ExecuteOnComputer=1 # [DB] # ExecuteOnComputer=2 DBS="1" #Define APIs in config.ini, intput ids of ExecuteOnComputer with whitespace separated. #e.g. "1 0 1 2" will generate the following code # [API] # ExecuteOnComputer=1 # [API] # [API] # ExecuteOnComputer=1 # [API] # ExecuteOnComputer=2 APIS="1 0 2 2" ###################################################################### ########## Starting to install programs, do not modify them! ######### ###################################################################### echo "Starting to install programs" > install.log #Find installation path if [ $# -gt 0 ] then INST_PATH="$1" else INST_PATH="/usr/local/mysql" fi if [ 0 -lt $INST_SERVER ] then echo "Now, installing the MySQL servers..." #Loop to install mysql servers INSTALLED_SERVER_COUNT=1 for PORT in $INST_PORTS do #Define the current mysql server installation path MYSL_PATH=$INST_PATH/$INSTALLED_SERVER_COUNT #Configure mysql server echo "Exec ./configure --prefix=$MYSL_PATH --with-pthread --with-unix-socket-path=$MYSL_PATH/var/mysql.sock --with-mysqld-user=root --with-tcp-port=$PORT --with-charset=gbk --with-ndbcluster" >> install.log ./configure --prefix=$MYSL_PATH --with-pthread --with-unix-socket-path=$MYSL_PATH/var/mysql.sock --with-mysqld-user=root --with-tcp-port=$PORT --with-charset=gbk --with-ndbcluster #Make mysql server echo "Exec make && make install" >> install.log make && make install #Create var directory for mysql data mkdir -p $MYSL_PATH/var #Create my.cnf echo "Create $MYSL_PATH/var/my.cnf" >> install.log echo "[client]" > $MYSL_PATH/var/my.cnf echo "port=$PORT" >> $MYSL_PATH/var/my.cnf echo "socket=$MYSL_PATH/var/mysql.sock" >> $MYSL_PATH/var/my.cnf echo "" >> $MYSL_PATH/var/my.cnf echo "[mysqld]" >> $MYSL_PATH/var/my.cnf echo "ndbcluster" >> $MYSL_PATH/var/my.cnf echo "ndb_connectstring=host=$MGM_HOST:$MGM_PORT" >> $MYSL_PATH/var/my.cnf echo "user=root" >> $MYSL_PATH/var/my.cnf echo "port=$PORT" >> $MYSL_PATH/var/my.cnf echo "basedir=$MYSL_PATH/" >> $MYSL_PATH/var/my.cnf echo "datadir=$MYSL_PATH/var/" >> $MYSL_PATH/var/my.cnf echo "socket=$MYSL_PATH/var/mysql.sock" >> $MYSL_PATH/var/my.cnf echo "default-character-set=gbk" >> $MYSL_PATH/var/my.cnf echo "default-storage-engine=INNODB" >> $MYSL_PATH/var/my.cnf echo "max_connections=500" >> $MYSL_PATH/var/my.cnf echo "" >> $MYSL_PATH/var/my.cnf echo "query_cache_size=33M" >> $MYSL_PATH/var/my.cnf echo "table_cache=1520" >> $MYSL_PATH/var/my.cnf echo "tmp_table_size=16M" >> $MYSL_PATH/var/my.cnf echo "thread_cache=38" >> $MYSL_PATH/var/my.cnf echo "" >> $MYSL_PATH/var/my.cnf echo "#MyISAM Specific options" >> $MYSL_PATH/var/my.cnf echo "#skip-myisam" >> $MYSL_PATH/var/my.cnf echo "" >> $MYSL_PATH/var/my.cnf echo "#INNODB Specific options" >> $MYSL_PATH/var/my.cnf echo "#skip-innodb" >> $MYSL_PATH/var/my.cnf chmod 755 $MYSL_PATH/var/my.cnf #Install mysql database echo "Exec $MYSL_PATH/bin/mysql_install_db" >> install.log $MYSL_PATH/bin/mysql_install_db #Create mysql control script if [ -e $MYSL_PATH/share/mysql/mysql.server ] then #Use default mysql control script #Create mysql server start script echo "Create $MYSL_PATH/start" >> install.log echo "$MYSL_PATH/share/mysql/mysql.server start" > $MYSL_PATH/start echo "Chmod 755 $MYSL_PATH/start" >> install.log chmod 755 $MYSL_PATH/start #Create mysql server stop script echo "Create $MYSL_PATH/stop" >> install.log echo "$MYSL_PATH/share/mysql/mysql.server stop" > $MYSL_PATH/stop echo "Chmod 755 $MYSL_PATH/stop" >> install.log chmod 755 $MYSL_PATH/stop #Create mysql server restart script echo "Create $MYSL_PATH/restart" >> install.log echo "$MYSL_PATH/share/mysql/mysql.server restart" > $MYSL_PATH/restart echo "Chmod 755 $MYSL_PATH/restart" >> install.log chmod 755 $MYSL_PATH/restart else #Use custom mysql control script #Create mysql server start script echo "Create $MYSL_PATH/start" >> install.log echo "$MYSL_PATH/libexec/mysqld &" > $MYSL_PATH/start echo "Chmod 755 $MYSL_PATH/start" >> install.log chmod 755 $MYSL_PATH/start #Create mysql server stop script echo "Create $MYSL_PATH/stop" >> install.log echo "$MYSL_PATH/bin/mysqladmin -u root -p shutdown" > $MYSL_PATH/stop echo "Chmod 755 $MYSL_PATH/stop" >> install.log chmod 755 $MYSL_PATH/stop #Create mysql server restart script echo "Create $MYSL_PATH/restart" >> install.log echo "$MYSL_PATH/bin/mysqladmin -u root -p shutdown" > $MYSL_PATH/restart echo "$MYSL_PATH/libexec/mysqld &" >> $MYSL_PATH/restart echo "Chmod 755 $MYSL_PATH/restart" >> install.log chmod 755 $MYSL_PATH/restart fi #Clean mysql server to get ready for the next installation echo "Exec make clean" >> install.log make clean INSTALLED_SERVER_COUNT=$(($INSTALLED_SERVER_COUNT + 1)) done echo "Configurations! MySQL servers has been installed successfully." echo "" echo "1. To start mysql server, use the following command:" echo " cd <mysql_installation_path>" echo " ./start" echo "" echo "2. To stop mysql server, use the following command:" echo " cd <mysql_installation_path>" echo " ./stop" echo "" echo "3. To restart mysql server, use the following command:" echo " cd <mysql_installation_path>" echo " ./restart" fi #Install cluster programs if [ 0 -lt $INST_CLUSTER ] then if [ -e $INST_PATH/1 ] then echo "Now, installing the cluster programs..." #Define the cluster installation path CLST_PATH=$INST_PATH/cluster #Create cluster directory echo "Exec mkdir -p $CLST_PATH" >> install.log mkdir -p $CLST_PATH #Copy cluster binaries echo "Exec cp $INST_PATH/1/bin/ndb* $CLST_PATH/" >> install.log cp $INST_PATH/1/bin/ndb* $CLST_PATH/ echo "Exec cp $INST_PATH/1/libexec/ndb* $CLST_PATH/" >> install.log cp $INST_PATH/1/libexec/ndb* $CLST_PATH/ #Create config.ini echo "Create $CLST_PATH/config.ini" >> install.log #Write default global configuration echo "[TCP DEFAULT]" >> $CLST_PATH/config.ini echo "" >> $CLST_PATH/config.ini echo "[MGM DEFAULT]" >> $CLST_PATH/config.ini echo "" >> $CLST_PATH/config.ini echo "[DB DEFAULT]" >> $CLST_PATH/config.ini echo " NoOfReplicas=1" >> $CLST_PATH/config.ini echo "" >> $CLST_PATH/config.ini echo "[API DEFAULT]" >> $CLST_PATH/config.ini echo "" >> $CLST_PATH/config.ini #Write computers configuration COMPUTER_ID=1 for COMPUTER in $COMPUTERS do echo "[COMPUTER]" >> $CLST_PATH/config.ini echo " Id=$COMPUTER_ID" >> $CLST_PATH/config.ini echo " HostName=$COMPUTER" >> $CLST_PATH/config.ini echo "" >> $CLST_PATH/config.ini COMPUTER_ID=$(($COMPUTER_ID + 1)) done #Write management server configuration for MGM in $MGMS do echo "[MGM]" >> $CLST_PATH/config.ini echo " HostName=$MGM" >> $CLST_PATH/config.ini echo "" >> $CLST_PATH/config.ini done #Write storage nodes configuration for DB in $DBS do echo "[DB]" >> $CLST_PATH/config.ini echo " ExecuteOnComputer=$DB" >> $CLST_PATH/config.ini echo "" >> $CLST_PATH/config.ini done #Write mysql servers configuration for API in $APIS do echo "[API]" >> $CLST_PATH/config.ini if [ 0 -ne $API ] then echo " ExecuteOnComputer=$API" >> $CLST_PATH/config.ini fi echo "" >> $CLST_PATH/config.ini done #Create Ndb.cfg echo "Create $CLST_PATH/Ndb.cfg" >> install.log echo "host=$MGM_HOST:$MGM_PORT" >> $CLST_PATH/Ndb.cfg echo "" >> $CLST_PATH/Ndb.cfg echo "Configurations! Cluster programs has been installed successfully." echo "" echo "1. To start management server(MGM), use the following command:" echo " cd $CLST_PATH" echo " ./ndb_mgmd" echo "" echo "2. To start stroage node(DB), use the following command:" echo " cd $CLST_PATH" echo " ./ndbd" echo "" echo "3. To manage the cluster, use the following command:" echo " cd $CLST_PATH" echo " ./ndb_mgm" echo "" echo "4. Else, nothing to do.;)" echo "" echo "Enjoy yourself." else echo "Cluster installation has been stopped, the reason is:"; echo " No database server installed." echo "So you can not use cluster programs in this machine!" fi fi </mysql_installation_path></mysql_installation_path></mysql_installation_path></code> |
3. 执行该脚本:./install.sh 或者 ./install

ACID屬性包括原子性、一致性、隔離性和持久性,是數據庫設計的基石。 1.原子性確保事務要么完全成功,要么完全失敗。 2.一致性保證數據庫在事務前後保持一致狀態。 3.隔離性確保事務之間互不干擾。 4.持久性確保事務提交後數據永久保存。

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MySQL使用SQL命令管理數據。 1.基本命令包括SELECT、INSERT、UPDATE和DELETE。 2.高級用法涉及JOIN、子查詢和聚合函數。 3.常見錯誤有語法、邏輯和性能問題。 4.優化技巧包括使用索引、避免SELECT*和使用LIMIT。

MySQL是一種高效的關係型數據庫管理系統,適用於存儲和管理數據。其優勢包括高性能查詢、靈活的事務處理和豐富的數據類型。實際應用中,MySQL常用於電商平台、社交網絡和內容管理系統,但需注意性能優化、數據安全和擴展性。

SQL和MySQL的關係是標準語言與具體實現的關係。 1.SQL是用於管理和操作關係數據庫的標準語言,允許進行數據的增、刪、改、查。 2.MySQL是一個具體的數據庫管理系統,使用SQL作為其操作語言,並提供高效的數據存儲和管理。

InnoDB使用redologs和undologs確保數據一致性和可靠性。 1.redologs記錄數據頁修改,確保崩潰恢復和事務持久性。 2.undologs記錄數據原始值,支持事務回滾和MVCC。

EXPLAIN命令的關鍵指標包括type、key、rows和Extra。 1)type反映查詢的訪問類型,值越高效率越高,如const優於ALL。 2)key顯示使用的索引,NULL表示無索引。 3)rows預估掃描行數,影響查詢性能。 4)Extra提供額外信息,如Usingfilesort提示需要優化。

Usingtemporary在MySQL查詢中表示需要創建臨時表,常見於使用DISTINCT、GROUPBY或非索引列的ORDERBY。可以通過優化索引和重寫查詢避免其出現,提升查詢性能。具體來說,Usingtemporary出現在EXPLAIN輸出中時,意味著MySQL需要創建臨時表來處理查詢。這通常發生在以下情況:1)使用DISTINCT或GROUPBY時進行去重或分組;2)ORDERBY包含非索引列時進行排序;3)使用複雜的子查詢或聯接操作。優化方法包括:1)為ORDERBY和GROUPB


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