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Change MySQL default character set to UTF-8 in my.cnf?
...want to add the following to my.cnf
[client]
default-character-set=utf8
[mysql]
default-character-set=utf8
[mysqld]
collation-server = utf8_unicode_ci
init-connect='SET NAMES utf8'
character-set-server = utf8
If you want to change the character set for an existing DB, let me know... your quest...
MySQL query String contains
I've been trying to figure out how I can make a query with MySQL that checks if the value (string $haystack ) in a certain column contains certain data (string $needle ), like this:
...
SQL: deleting tables with prefix
...
You cannot do it with just a single MySQL command, however you can use MySQL to construct the statement for you:
In the MySQL shell or through PHPMyAdmin, use the following query
SELECT CONCAT( 'DROP TABLE ', GROUP_CONCAT(table_name) , ';' )
AS statement...
搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...常是 2个副本 + 1个仲裁。
说了这么多，还是来实战一下如何搭建高可用的mongodb集群：
首先确定各个组件的数量，mongos 3个， config server 3个，数据分3片 shard server 3个，每个shard 有一个副本一个仲裁也就是 3 * 2 = 6 个，总共需要...
Nginx缓存解决方案：SRCache - 更多技术 - 清泛网 - 专注C/C++及内核技术
....shared, key, value, expire)
end
return status
最后一个问题：如何判断缓存是否生效了？试试下面的命令：
shell> curl -v "http://foo.com/test?x=123&y=abc"
< X-SRCache-Fetch-Status: HIT
< X-SRCache-Store-Status: BYPASS
目前我主要用srcache来缓存一些接口...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...切换连接？目前需要手工切换。
主节点的读写压力过大如何解决？
从节点每个上面的数据都是对数据库全量拷贝，从节点压力会不会过大？
数据压力大到机器支撑不了的时候能否做到自动扩展？
这篇文章看完这些问题就...
Remote connect to clearDB heroku database
How can i perform a remote connect to ClearDB MySQL database on heroku using for example MySQL Query Browser. Where to get url, port, login and password?
...
Run php script as daemon process
... service:
[Unit]
Description=My PHP Daemon Service
#May your script needs MySQL or other services to run, eg. MySQL Memcached
Requires=mysqld.service memcached.service
After=mysqld.service memcached.service
[Service]
User=root
Type=simple
TimeoutSec=0
PIDFile=/var/run/myphpdaemon.pid
ExecStart=/u...
C/C++ 如何向上取整？ - C/C++ - 清泛网 - 专注C/C++及内核技术
C/C++ 如何向上取整？一般地，向上取整有两种方法：#include <math.h>int _tmain(int argc, _TCHAR* argv[]){int a = 6, b = 5; ceil函数printf("%d...一般地，向上取整有两种方法：
#include <math.h>
int _tmain(int argc, _TCHAR* argv[])
{
int a = 6, b = 5;
//ce...
ERROR: Error 1005: Can't create table (errno: 121)
I have troubles with forward engineering my MySQL database into WAMP server..
I was going to post an image of the schema but as this is my first post I can't.
...