通过fio压测rbd设备，提高Ceph集群的IOPS

一.fio安装

1.下载fio

fio 官网地址：http://freshmeat.net/projects/fio/

wget http://brick.kernel.dk/snaps/fio-2.0.7.tar.gz

2.确认ceph-devel-compat是否安装

[root@node-2 fio]# rpm -qa | grep ceph-devel-compat

ceph-devel-compat-0.94.6-1.el7.centos.x86_64

如果未安装，先安装ceph-devel-compat，安装需要java环境，如果安装不成功，先安装jdk

yum install ceph-devel-compat

3.安装jdk

下载安装jdk包

wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u91-b14/jdk-8u91-linux-x64.rpm

安装jdk rpm -ivh jdk-8u91-linux-x64.rpm

确认java安装成功 [root@node-2 fio]# java -version

java version "1.8.0_91"

Java(TM) SE Runtime Environment (bui