mysql安装
1. 安装 OpenSSL:下载 OpenSSL Version 0.9.6 (www.openssl.org)
shell> zcat 0.96l.tar.gz | tar xvf -
shell> ./config
shell> make
shell> make install
2. 安装 MySQL:
下载 MySQL Version 4.0.14 Source (mysql-4.0.14.tar.gz)
shell> groupadd mysql
shell> useradd -g mysql mysql
shell> gunzip shell> cd mysql-VERSION
shell> ./configure --prefix=/usr/local/mysql --with –openssl --with -vio
shell> make
shell> make install
shell> cp support-files/my-medium.cnf /etc/my.cnf
shell> cd /usr/local/mysql
shell> bin/mysql_install_db --user=mysql
shell> chown -R root .
shell> chown -R mysql var
shell> chgrp -R mysql .
shell> bin/mysqld_safe --user=mysql &
3. 修改mysql密码及访问权限 (根据需要。可能造成安全问题)
shell> cd /usr/local/mysql/bin/
shell> ./mysql -u root –p
mysql> INSERT INTO mysql.user VALUES ('%','root', PASSWORD('1qw23e'),'Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0);
4. 生成SSL证书
DIR=`pwd`/openssl
PRIV=$DIR/private
mkdir $DIR $PRIV $DIR/newcerts
cp /usr/share/ssl/openssl.cnf $DIR
replace ./demoCA $DIR -- $DIR/openssl.cnf
# Create necessary files: $database, $serial and $new_certs_dir
# directory (optional)
touch $DIR/index.txt
echo "01" > $DIR/serial
# Generation of Certificate Authority(CA)
openssl req -new -x509 -keyout $PRIV/cakey.pem -out $DIR/cacert.pem \
-config $DIR/openssl.cnf
Note : if you were requested to enter "PEM pass", please enter different "PEM pass" in the following steps.
# Create server request and key
openssl req -new -keyout $DIR/server-key.pem -out \
$DIR/server-req.pem -days 3600 -config $DIR/openssl.cnf
# Remove the passphrase from the key (optional)
openssl rsa -in $DIR/server-key.pem -out $DIR/server-key.pem
# Sign server cert
openssl ca -policy policy_anything -out $DIR/server-cert.pem \
-config $DIR/openssl.cnf -infiles $DIR/server-req.pem
# Create client request and key
openssl req -new -keyout $DIR/client-key.pem -out \
$DIR/client-req.pem -days 3600 -config $DIR/openssl.cnf
# Remove a passphrase from the key (optional)
openssl rsa -in $DIR/client-key.pem -out $DIR/client-key.pem
# Sign client cert
openssl ca -policy policy_anything -out $DIR/client-cert.pem \
-config $DIR/openssl.cnf -infiles $DIR/client-req.pem
5. 修改选项文件
/etc/my.cnf
[client]
ssl-ca=$DIR/cacert.pem
ssl-cert=$DIR/client-cert.pem
ssl-key=$DIR/client-key.pem
[mysqld]
ssl-ca=$DIR/cacert.pem
ssl-cert=$DIR/server-cert.pem
ssl-key=$DIR/server-key.pem
6. 测试启动mysql
$DIR 是选项文件my.cnf 的路径
shell> mysqld --defaults-file=$DIR/my.cnf &
Then invoke a client program using the same option file:
shell> mysql --defaults-file=$DIR/my.cnf
执行以下语句,如果返回以下结果,安装完全成功
mysql> SHOW VARIABLES LIKE 'have_openssl';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| have_openssl | YES |
+---------------+-------+
7. 启动MySQL daemon
/usr/local/libexec/mysqld -u mysql & 或者 /usr/local/sbin/mysqld &

mysql'sblobissuitableForStoringBinaryDataWithInareLationalDatabase,而ilenosqloptionslikemongodb,redis和calablesolutionsolutionsolutionsoluntionsoluntionsolundortionsolunsonstructureddata.blobobobissimplobisslowdeperformberbutslowderformandperformancewithlararengedata;

toaddauserinmysql,使用:createUser'username'@'host'Indessify'password'; there'showtodoitsecurely:1)choosethehostcarecarefullytocon trolaccess.2)setResourcelimitswithoptionslikemax_queries_per_hour.3)usestrong,iniquepasswords.4)Enforcessl/tlsconnectionswith

toAvoidCommonMistakeswithStringDatatatPesInMysQl,CloseStringTypenuances,chosethirtightType,andManageEngencodingAndCollationsEttingSefectery.1)usecharforfixed lengengtrings,varchar forvariable-varchar forbariaible length,andtext/blobforlargerdataa.2 seterters seterters seterters

mysqloffersechar,varchar,text,and denumforstringdata.usecharforfixed Lengttrings,varcharerforvariable長度,文本forlarger文本,andenumforenforcingDataAntegrityWithaEtofValues。

優化MySQLBLOB請求可以通過以下策略:1.減少BLOB查詢頻率,使用獨立請求或延遲加載;2.選擇合適的BLOB類型(如TINYBLOB);3.將BLOB數據分離到單獨表中;4.在應用層壓縮BLOB數據;5.對BLOB元數據建立索引。這些方法結合實際應用中的監控、緩存和數據分片,可以有效提升性能。

掌握添加MySQL用戶的方法對於數據庫管理員和開發者至關重要,因為它確保數據庫的安全性和訪問控制。 1)使用CREATEUSER命令創建新用戶,2)通過GRANT命令分配權限,3)使用FLUSHPRIVILEGES確保權限生效,4)定期審計和清理用戶賬戶以維護性能和安全。

chosecharforfixed-lengthdata,varcharforvariable-lengthdata,andtextforlargetextfield.1)chariseffity forconsistent-lengthdatalikecodes.2)varcharsuitsvariable-lengthdatalikenames,ballancingflexibilitibility andperformance.3)

在MySQL中處理字符串數據類型和索引的最佳實踐包括:1)選擇合適的字符串類型,如CHAR用於固定長度,VARCHAR用於可變長度,TEXT用於大文本;2)謹慎索引,避免過度索引,針對常用查詢創建索引;3)使用前綴索引和全文索引優化長字符串搜索;4)定期監控和優化索引,保持索引小巧高效。通過這些方法,可以在讀取和寫入性能之間取得平衡,提升數據庫效率。


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