mysql一张表1亿天数据_1亿条数据在PHP中实现Mysql数据库分表100张

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1亿条数据在PHP中实现Mysql数据库分表100张

http://php-z.com/thread-2115-1-1.html

(出处: PHP-Z)

当数据量猛增的时候,大家都会选择库表散列等等方式去优化数据读写速度。笔者做了一个简单的尝试,1亿条数据,分100张表。具体实现过程如下:

首先创建100张表:

$i=0;

2 while($i<=99){

3 echo "$newNumber \r\n";

4 $sql="CREATE TABLE `code_".$i."` (

5 `full_code` char(10) NOT NULL,

6 `create_time` int(10) unsigned NOT NULL,

7 PRIMARY KEY (`full_code`),

8 ) ENGINE=MyISAM DEFAULT CHARSET=utf8";

9 mysql_query($sql);

10 $i++;

下面说一下我的分表规则,full_code作为主键,我们对full_code做hash

函数如下:

$table_name=get_hash_table('code',$full_code);

2 function get_hash_table($table,$code,$s=100){

3 $hash = sprintf("%u", crc32($code));

4 echo $hash;

5 $hash1 = intval(fmod($hash, $s));

6 return $table."_".$hash1;

7 }

CREATE TABLE IF NOT EXISTS `code` (

2 `full_code` char(10) NOT NULL,

3 `create_time` int(10) unsigned NOT NULL,

4 INDEX(full_code)

5 ) T

这样我们通过select * from code就可以得到所有的full_code数据了。

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