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安装flashcachewget https://github.com/facebook/flashcache/archive/master.ziptar xf flashcache-master.tarcd flashcache-masteruname -aLinux xiaomi 2.6.32-220.el6.x86_64 #1 SMP Tue Dec 6 19:48:22 GMT 2011
## flashcache出现的背景环境1.长期积攒的大数据量如果将这些数据全部放在大容量的SATA、SAS盘上时，会发现性能(响应时间)不够；2.如果全放在SSD上时，又会发现成本很高。3.即使公司能够大气到都放到SSD上，你会发现1TB的数据里面可能只有200G是经常被访问的，300G可能偶尔被访问到，最后剩下的500G可能已经成为历史数据了，几乎不被访问到，如果全部都放在SSD上有略有浪费。
翻译自 http://code.google.com/p/mysql-master-ha/wiki/Advantages#Advantages_of_MHAAdvantages of MHA/* mha优点 */一、Master failover and slave promotion can be done very quickly/* master故障切换 和 slave提升 都是
翻译自 : http://code.google.com/p/mysql-master-ha/wiki/Architecture一、Architecture of MHA/*mha的结构(架构)*/When a master crashes, MHA recovers rest slaves as below. /* 当master崩溃时，mha按照下面恢复剩余的slave们 */In relay
翻译自 http://code.google.com/p/mysql-master-ha/wiki/OverviewDifficulties of Master FailoverMaster Failover is not as trivial as it might seem. Take the most typical MYSQL deployment case of a sin
A primary objective of MHA is automating master failover and slave promotion within short (usually 10-30 seconds) downtime, without suffering from replication consistency problems, without spending mo
rm /root/.ssh -frssh-keygen -t rsa 在各个机器上执行cat /root/.ssh/id_rsa.pub 吧各个机器的这个文件都拷出来，当一个模板用echo "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA07DhqapHjfGP6Q
# 1.删除已有公钥 rm /root/.ssh -fr #2.创建公钥 ssh-keygen -t rsa 一路直接【回车】就可以了 #3.查看是否创建成功钥匙 ls /root/.ssh/ id_rsa(密钥) id_rsa.pub(公钥) known_hosts #4.把公钥 id_rsa.pub 复制到需要从自身远程登录的机器(192.168.75.134)上： sc
#1.为 in_1.bbb、out_1.bbb 添加数据create table in_1.bbb(id int); create table out_1.bbb(id int); insert into in_1.bbb values(1); insert into out_1.bbb values(1);# 以上操作 master-blkh-slave 都没有问题，潜在的问题是 ou
#! /bin/sh`chkconfig NetworkManager off``chkconfig acpid off``chkconfig anacron off``chkconfig apmd on``chkconfig atd off``chkconfig a
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