第一步:生成密匙对,我用的是rsa的密钥。使用命令 ”ssh-keygen -t rsa”
[user1@rh user1]$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/user1/.ssh/id_rsa):
Created directory '/home/user1/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/user1/.ssh/id_rsa.
Your public key has been saved in /home/user1/.ssh/id_rsa.pub.
The key fingerprint is:
e0:f0:3b:d3:0a:3d:da:42:01:6a:61:2f:6c:a0:c6:e7 user1@rh.test.com
[user1@rh user1]$
生成的过程中提示输入密钥对保存位置,直接回车,接受默认值就行了。接着会提示输入一
个不同于你的password的密码,直接回车,让它空着。当然,也可以输入一个
其中公共密钥保存在 ~/.ssh/id_rsa.pub
私有密钥保存在 ~/.ssh/id_rsa
之后把这个密钥对中的公共密钥复制到你要访问的机器上去,并保存为
~/.ssh/authorized_keys.
[user1@rh user1]$ scp ~/.ssh/id_rsa.pub rh1:/home/user1/.ssh/authorized_keys
user1@rh1's password:
id_rsa.pub 100% 228 3.2MB/s 00:00
至此完成。登录不用密码了
Posted by admin at 10:38 上午 on 三月 1st, 2010.
Categories: linux. Tags: ssh, ssh密钥.
grant replication slave on *.* to repluser1@192.168.8.126 identified by ‘111111′;
Posted by admin at 6:54 下午 on 一月 14th, 2010.
Categories: 幸福录音带.
第一步,准备测试数据。
[root@node1 ~]# sysbench –test=oltp –oltp-table-size=1000000 –mysql-table-engine=myisam –mysql-db=test –mysql-socket=/opt/mysql1/data/mysql.sock –mysql-user=root prepare
sysbench 0.4.12: multi-threaded system evaluation benchmarkNo DB drivers specified, using mysql
Creating table ’sbtest’…
Creating 1000000 records in table ’sbtest’… |
同时,在另一个窗口使用vmstat去关注cpu idle、context switch,一些必要参数的变化,随时掌握系统的运行状况。

第二步,20个用户同时并发500000条查询请求,对测试表sbtest进行只读操作。执行完成总时间大概26分钟左右,执行中最长的一次操作接近9分钟,还有结果中95%这个指标我们也会关注。
[root@node1 ~]# sysbench –num-threads=20 –max-requests=500000 –test=oltp –oltp-table-size=1000000 –mysql-db=test –mysql-socket=/opt/mysql1/data/mysql.sock –mysql-user=root –oltp-read-only run
sysbench 0.4.12: multi-threaded system evaluation benchmarkNo DB drivers specified, using mysql
Running the test with following options:
Number of threads: 20Doing OLTP test.
Running mixed OLTP test
Doing read-only test
Using Special distribution (12 iterations, 1 pct of values are returned in 75 pct cases)
Using “LOCK TABLES READ” for starting transactions
Using auto_inc on the id column
Maximum number of requests for OLTP test is limited to 500000
Threads started!
Done.OLTP test statistics:
queries performed:
read: 7000112
write: 0
other: 1000016
total: 8000128
transactions: 500008 (322.15 per sec.)
deadlocks: 0 (0.00 per sec.)
read/write requests: 7000112 (4510.14 per sec.)
other operations: 1000016 (644.31 per sec.)Test execution summary:
total time: 1552.0822s
total number of events: 500008
total time taken by event execution: 31034.2430
per-request statistics:
min: 3.56ms
avg: 62.07ms
max: 521.56ms
approx. 95 percentile: 95.59msThreads fairness:
events (avg/stddev): 25000.4000/61.39
execution time (avg/stddev): 1551.7121/0.16 |
通过vmstat监测,会发现cpu空闲保持在34%上下,context switch的速度在每秒29000左右。

下面是用strace这个工具去监测sysbench的执行,你可以看到从fd3到fd22一共20并发请求的执行状况。

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Posted by admin at 12:28 下午 on 一月 12th, 2010.
Categories: mysql. Tags: mysql, status, sysbench.
mysqlmanager的管理方式貌似在慢慢被遗忘,现流行用mysqld_multi来管理多个实例:
配置文件: my.cnf
[mysqld_multi]
mysqld = /usr/bin/mysqld_safe
mysqladmin = /usr/bin/mysqladmin
user = root
password = defage
[mysqld1]
datadir=/opt/data1
socket=/opt/data1/mysql.sock
pid-file=/opt/data1/mysql1.pid
log=/opt/data1/mysql1.log
user=mysql
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=1
default-character-set=utf8
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[mysqld2]
datadir=/opt/data2
socket=/opt/data2/mysql.sock
pid-file=/opt/data2/mysql2.pid
log=/opt/data2/mysql2.log
user=mysql
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=1
port=3307
default-character-set=utf8
[mysqld3]
datadir=/opt/data3
socket=/opt/data3/mysql.sock
pid-file=/opt/data3/mysql3.pid
log=/opt/data3/mysql3.log
user=mysql
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=1
port=3308
default-character-set=utf8
启动:
mysqld_multi –config-file=/etc/my.cnf start 1 ;只启动第一个mysql服务,相关文件由my.cnf中mysql1设定。
mysqld_multi –config-file=/etc/my.cnf start 1-4,启动 第1至4mysql服务
Posted by admin at 5:27 下午 on 一月 11th, 2010.
Categories: mysql. Tags: mysqld_multi.
安装sysbench:
tar zxvf sysbench-4.12
cd sysbench-4.12
./configure –prefix=/usr/local/sysbench -with-mysql-includes=/usr/local/mysql/include/mysql –with-mysql-libs=/usr/local/mysql/lib/mysql
make && make install
出现这个错误是没有指定相应的–with-mysql-includes和–with-mysql-libs目录.找到正确的目录从新编译。
3、make的时候出现
../libtool: line 2412: Xsysbench: command not found
../libtool: line 2547: X-lmysqlclient_r: command not found
../libtool: line 2547: X-lz: command not found
../libtool: line 2547: X-lcrypt: command not found
只要先运行一次./autogen.sh,然后再configure,make就可以了.autogen.sh文件在sysbench-4.12解压目录下的.
1 、准备数据
#sysbench –debug=off –test=oltp –mysql-host=127.0.0.1 –mysql-user=root –mysql-password=defage –oltp-table-size=1000000 –mysql-db=test –oltp-table-name=stest –num-threads=20 –max-requests=10000 –oltp-auto-inc=off –mysql-engine-trx=yes –db-driver=mysql –mysql-port=3307 prepare
2、测试
# sysbench –debug=off –test=oltp –mysql-host=10.15.2.137 –mysql-user=test –mysql-password=test –oltp-table-size=1000000 –mysql-db=test –oltp-table-name=stest –num-threads=20 –max-requests=10000 –oltp-auto-inc=off –mysql-engine-trx=yes run
3、删除数据
# sysbench –debug=off –test=oltp –mysql-host=10.15.2.137 –mysql-user=test –mysql-password=test –oltp-table-size=1000000 –mysql-db=test –oltp-table-name=stest –num-threads=20 –max-requests=10000 –oltp-auto-inc=off –mysql-engine-trx=yes cleanup
提示错误:sysbench 0.4.10: multi-threaded system evaluation benchmark
FATAL: no database driver specified
FATAL: failed to initialize database driver!
则是sysbench没有指定对应的数据库driver,在上面的命令后加参数 –db-driver=mysql即可
Posted by admin at 3:49 下午 on 一月 8th, 2010.
Categories: mysql. Tags: mysql, mysql测试, sysbench.