Cosbench测试

```xml
写（上传）、4K：
<?xml version="1.0" encoding="UTF-8" ?>
<workload name="perf-test-tk" description="sample benchmark for s3">
	<workflow>
		<workstage name="4k-write-test1">
			<work name="w1" workers="100" interval="2" runtime="600" driver="driver1">
				<operation type="write" ratio="100" config="cprefix=testsmallfile;oprefix=aa-4kb-1-;containers=r(1,1);objects=r(1,100000000);sizes=c(4)KB;" />
				<storage type="s3" config="path_style_access=true;accesskey=ksjaldkfjioon;secretkey=dajkhsdfklhsdlkf;endpoint=http://192.168.12.12" />
			</work>
 		</workstage>
	</workflow>
</workload>

读（下载）、4K：
<?xml version="1.0" encoding="UTF-8" ?>
<workload name="perf-test-tk" description="sample benchmark for s3">
	<storage config="path_style_access=true;accesskey=jkhdkfahsdh;secrekey=jkdhfklasdfklsdlfjk;endpoint=http://192.168.12.12" type="s3" />
	<workflow>
		<workstage name="init">
			<work config="cprefix=s3testbucket;containers=r(1,1)" type="init" workers="1" />
		</workstage>
		<workstage name="prepare">
			<work config="cprefix=s3testbucket;oprefix=a4kobject-1-;containers=r(1,1);objects=r(1,100000);sizes=c(4)KB" type="prepare" workers="100" />
		</workstage>
	</workflow>
</workload>

runtime：测试时间（单位：s）
driver：客户端，一般情况，客户端数对应节点数
type：类型，读、写
ratio：当前操作数占总操作数的比例
cprefix：桶名前缀
oprefix：对象前缀
containers：桶的个数
objects：对象个数，有写场景尽量设置大一点，保证对象名不会重复
sizes：对象大小
accesskey：接入证书
secretkey：安全证书
endpoint：存储节点的业务地址
```

测试完成后返回“web console”主页面，点击“view details”进入数据结果页面，
记录各项性能数据。