ondemand

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

OnDemand only requires a user account for the instance owner .

OnDemand只需要实例所有者的用户帐户，通常就是root用户。

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

You can throw in Content Manager OnDemand as transactional data is involved here .

还可以额外使用ContentManagerOnDemand，因为这里涉及事务性数据。

The following command will start the OnDemand instance

下述命令将启动OnDemand实例

For this load , the default ondemand governor had a slightly better performance per watt .

对于这个负载水平，默认ondemand调控器拥有的“性能/瓦特”值略好一些。

If you set this value to100 , 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。

Install the OnDemand software on both nodes

在两个节点上安装OnDemand软件

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。

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。

The tuned ondemand governor was running with an up_threshold of98 as well .

调优的ondemand调控器也使用upthreshold为98的设置运行。

Conservative governor : A more gradual ondemand

保守调控器：更具渐进性的随需应变方式

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。

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。

Ondemand : This value is the same as respawn but applies only to run levels a , b , and c.

ondemand：该值与respawn相同，但只适用于运行级别a、b和c。

After the printed output and index values are stored , you can use any of the OnDemand client programs to query and retrieve documents .

在保存印刷品及其索引之后，您就可以使用任何OnDemand客户程序查询和检索文档。

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。

Introduced in the2.6.10 kernel , the ondemand governor was the first in-kernel governor to dynamically change processor frequency based on processor utilization .

内核中引入的随需应变调控器是首款根据处理器利用率动态更改处理器频率的内核调控器。

The ondemand governor checks the processor utilization and if it exceeds the threshold , the governor will set the frequency to the highest available .

随需应变调控器将检查处理器利用率，如果发现其超过阀值，则会将频率设置为可用的最高值。

The following graphs compare the effects of two tunable in-kernel governors , conservative and ondemand , and the performance governor as a baseline comparison .

以下图形比较conservative和ondemand这两个可调优内核调控器和作为基准比较的performance调控器。

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 conservative governor is the most power-efficient for a load of8-12 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。

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

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

Here you can see that for almost every load , the tuned ondemand governor with an upwards utilization threshold of98 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。

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upthreshold不会影响性能。