面朝大海 春暖花开
发布时间:2014-11-18 12:17:39
表格 B-1. 特殊的shell变量变量含义$0脚本名字$1位置参数 #1$2 - $9位置参数 #2 - #9${10}位.........【阅读全文】
发布时间:2014-11-07 12:20:33
[+] Mysql到底是怎么实现MVCC的?这个问题无数人都在问,但google中并无答案,本文尝试从Mysql源码中寻找答案。 在Mysql中MVCC是在Innodb存储引擎中得到支持的,Innodb为每行记录都实现了三个隐藏字段:6字节的事务ID(DB_TRX_ID )7字节的回滚指针(DB_ROLL_PTR)隐藏的ID.........【阅读全文】
发布时间:2014-11-07 09:54:34
Consistent Nonlocking ReadsA consistent read means that InnoDB uses multi-versioning to present to a query a snapshot of the database at a point in time. The query sees the changes made by transactions that committed before that point of time, and no changes made by later or.........【阅读全文】
发布时间:2014-09-22 14:01:58
1.插入安装盘2.进去/Package目录3.安装telnet 客户端查看客户端有没安装 rpm -q telnet安装客户端 rpm -ivh telnet-0.17-39.el6.x86_64.rpm4.安装服务器查看服务端有没安装 rpm -q telnet-server安装服务端 rpm -ivh telnet-server-0.17-39.el6.x86_64.rpmwarning: CentOS/telnet-server-0.17-39.el6.x86_64rpm: He.........【阅读全文】