Configure the OnDemand instance on Saturn.

在saturn上配置OnDemand实例。

Install the OnDemand software on both nodes.

在两个节点上安装OnDemand软件。

Conservative governor: A more gradual ondemand

保守调控器：更具渐进性的随需应变方式

The following command will start the OnDemand instance.

下述命令将启动OnDemand实例。

Ondemand governor: Frequency change based on processor use.

随需应变调控器：基于处理器的频率变更。

Create the OnDemand database and test the instance on Saturn.

创建OnDemand数据库并在saturn上测试该实例。

The tuned ondemand governor was running with an up_threshold of 98 as well.

调优的ondemand调控器也使用up _ threshold为98的设置运行。

Figure 7 compares all five governors with ondemand and conservative threshold tuning.

图7比较所有5个调控器，其中ondemand和conservative的阈值进行了调优。

If you set this value to 100, the governor will act exactly like the ondemand governor.

如果把这个值设置为100，这个调控器的表现会与ondemand调控器完全一样。

Now we'll compare how the tuned ondemand and conservative governors behave with this workload.

现在我们将比较调优的ondemand和conservative调控器在这个工作负载下的表现。

If you load the ondemand governor, you will see a directory called ondemand in the cpufreq directory.

如果装载ondemand调控器，会在cpufreq目录中看到ondemand目录。

In this section, I'll compare the tuned ondemand and conservative governors to the other three governors.

在这个小节中，我将比较调优的ondemand和conservative调控器与其他3个调控器。

If the governor is set to conservative or ondemand, you will also see a directory of the governor's name here.

如果调控器设置为conservative或ondemand，还会在这里看到与调控器同名的目录。

Verify that the cluster is up and running on both nodes and that you can access OnDemand via the Windows client.

检查群集是否启动并在两个节点上运行，能够通过Windows客户机访问群集。

Tap OnDemand to view a list of 25, 000 TV shows and movies, mostly free, that you can play instantly - on your TV.

敲击“点播”，会看到25000个电视节目和电影的列表，大部分都是免费的，你可以立刻在你家的电视上播放这些节目。

The saturn_svc adapter will be configured for IPAT since this will be the address to which the OnDemand clients will connect.

saturn_svc适配器配置用于IPAT，因为OnDemand客户要连接的就是这个地址。

Note that any changes to the ondemand settings will be applied systemwide so you will not need to change the setting for each processor.

注意，对 ondemand 设置的任何修改会应用于整个系统范围，所以不需要为每个处理器修改设置。

The conservative governor is the most power-efficient for a load of 8-12 percent utilization, closely followed by the ondemand governor.

conservative调控器在8 - 12%的利用率负载水平上的能效最高，紧随其后的是ondemand调控器。

OnDemand USES several directories defined by the ars.cfg, ars.dbfs, and ars.cache configuration files as well as the installation directory.

OnDemand使用通过配置文件ars . cfg、ars . dbfs和ars . cache定义的几个目录以及安装目录。

Verify that the cluster migrates all the resources and starts the OnDemand application on cassini and that you can access it via the Windows client.

检查群集是否迁移了所有资源，在cassini上启动OnDemand应用程序，看看能否通过Windows客户程序访问它。

The ondemand up_threshold is set to 80 by default, meaning that once the CPU utilization reaches above 80 percent, the governor will increase the frequency.

ondemand up _ threshold默认设置为80，表示一旦CUP利用率达到80%以上，ondemand调控器将提高频率。

As you can see by the dotted lines, both the default and tuned ondemand governor achieved a very similar score, so changing the up_threshold does not show any performance impact.

从图中的虚线可以看出，默认和调优ondemand调控器获得了非常相似的得分，可见，更改up _ threshold不会影响性能。

Figure 3 compares the ondemand governor's effectiveness running the default configuration, an up_threshold of 80 versus the tuned ondemand governor, running with an up_threshold of 98.

图3比较ondemand调控器以默认配置(up _ threshold为80)运行的效果和以调优后的设置(up _ threshold为98)运行的效果。

Here you can see that for almost every load, the tuned ondemand governor with an upwards utilization threshold of 98 is slightly more power efficient than the default ondemand governor.

从图4可以看出，对于几乎每一个负载水平，调优后的ondemand调控器(利用率阈值为98)比默认ondemand调控器的能效都略高一些。

You can see that the conservative governor saves about 20w over the performance governor; that is, there is no processor frequency scaling and the ondemand governor saves about 15w on average.

可以看出，conservative调控器比performance调控器大约节约了20w；也就是说，没有处理器变频且ondemand调控器平均节约15w。

Note: The server configuration information for the OnDemand client should not need to be changed. You should still be able to access the OnDemand server even though it is actually running on cassini.

提示：OnDemand 客户的服务器配置信息应该不需要修改，虽然 OnDemand 实际上运行在 cassini 之上，但您应该仍能访问它。