Quick Test Setup of MySQL Cluster
To familiarize you with the basics, we will describe the simplest
possible configuration for a functional MySQL Cluster. After this,
you should be able to design your desired setup from the
information provided in the other relevant sections of this
chapter.
First, you need to create a configuration directory such as
/var/lib/mysql-cluster
, by executing the
following command as the system root
user:
shell> mkdir /var/lib/mysql-cluster
In this directory, create a file named
config.ini
that contains the following
information. Substitute appropriate values for
HostName
and DataDir
as
necessary for your system.
# file "config.ini" - showing minimal setup consisting of 1 data node,
# 1 management server, and 3 MySQL servers.
# The empty default sections are not required, and are shown only for
# the sake of completeness.
# Data nodes must provide a hostname but MySQL Servers are not required
# to do so.
# If you don't know the hostname for your machine, use localhost.
# The DataDir parameter also has a default value, but it is recommended to
# set it explicitly.
# Note: [db], [api], and [mgm] are aliases for [ndbd], [mysqld], and [ndb_mgmd],
# respectively. [db] is deprecated and should not be used in new installations.
[ndbd default]
NoOfReplicas= 1
[mysqld default]
[ndb_mgmd default]
[tcp default]
[ndb_mgmd]
HostName= myhost.example.com
[ndbd]
HostName= myhost.example.com
DataDir= /var/lib/mysql-cluster
[mysqld]
[mysqld]
[mysqld]
You can now start the ndb_mgmd
management
server. By default, it attempts to read the
config.ini
file in its current working
directory, so change location into the directory where the file is
located and then invoke ndb_mgmd
:
shell> cd /var/lib/mysql-cluster
shell> ndb_mgmd
Then start a single data node by running ndbd
:
相关文档:
http://www.cnblogs.com/neonlight/archive/2008/08/25/1276178.html
近一段时间,很多部门同事反映在使用mysql的过程出现数据库连接自动断开的问题,我对该问题做了一些实验。
关于mysql自动断开的问题研究结果如下,在mysql中有相关参数设定,当数据库连接空闲一定时间后,服务器就
会断开等待超时的连接:
1、相关参 ......
表设计方面:
1、字段名尽量简化,不要超过18个字符
2、使用尽量小的数据类型,例如:MEDIUMINT比INT少占用25%空间
3、字段类型应尽量避免设置成可变长度,如:VARCHAR、BLOB、TEXT
4、用于比较的不同字段,应设置相同的类型及长度
5、尽可能将字段声明为NOT NULL,并指定DEFAULT
6、主索引尽可能短
7、仅创建真正 ......
sudo apt-get install mysql-server mysql-client
sudo apt-get install sun-java6-jdk(安装出意外,sudo dpkg -P sun-java6-bin,然后重新安装)
sudo vi /etc/network/interfaces 配置网络
auto eth0
iface eth0 inet dhcp(static)
address 192.168.8.108
netmask 255.255.255.0
gateway 192.168.8.1
:x保存
sud ......
1、选取最适用的字段属性
MySQL可以很好的支持大数据量的存取,但是一般说来,数据库中的表越小,在它上面执行的查询也就会越快。因此,在创建表的时候,为了获得更好的性能,我们可以将表中字段的宽度设得尽可能小。例如,在定义邮政编码这个字段时,如果将其设置为CHAR(255),显然给数据库增加了不必要的空间,甚至使 ......