Hands-On Exercise: Creating a Process Matching Criterion in .NET

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Hands-On Exercise: Creating a Process Matching Criterion
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In this exercise, we will create a process matching criterion to match Notepadexe when executed by an account belonging to the local Users group 1 Open Windows System Resource Manager (Start | Administrative Tools | Windows System Resource Manager) 2 You will be prompted to select the server to administer either the local or a remote node Select This Computer, and then click Connect 3 Right-click Process Matching Criteria in the navigation pane and choose New Process Matching Criteria from the pop-up menu 4 In the Description field, enter AllNotepad as the Criteria Name and This will match any notepad process initiated by any member of the local Users group (Figure 7-4)
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Resource Management and Performance Monitoring
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Figure 7-4 New Process Matching Criteria
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5 Click the Add button to add a new rule 6 In the Included Files Or Command Lines section, choose Application from the drop-down menu and click the Select button 7 Browse to C:\Windows\System32 and select notepadexe Then click Open This will add C:\Windows\System32\notepadexe to your list of included files, as shown in Figure 7-5 8 Click the Users Or Groups tab 9 Click the Add button next to the Included Users And Groups list box 10 Type in Users in the Select Users Or Groups dialog box and then click OK This will add BUILTIN\Users to the list of Included Users And Groups, as shown in Figure 7-6
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Microsoft Windows Server 2008 Administration
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Figure 7-5 Adding notepadexe to the list of included files
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11 Click OK on the Add Rule dialog box to save the settings 12 Click OK on the New Process Matching Criteria dialog box to save this criterion (Figure 7-7)
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Resource Allocation Policies
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Once you ve created your process matching criteria, you can create resource allocation policies These policies dictate how processes get their share of resources Each policy contains a list of one or more process matching criteria that in turn have a set of resource constraints such as CPU allocation, affinity, and memory limits Four resource allocation policies are defined out of the box By default, the Equal_Per_Process policy is set, which gives each process an equal share of CPU time Only one resource allocation policy can be active at any given time This active policy is called the managing policy In the WSRM
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Figure 7-6 Adding BUILTIN\Users to the list of included users and groups
console, this policy is clearly identified by the string {Manage} that appears next to the policy name Following are the resource allocation policies: Equal_Per_Process Each running process gets its equal share of CPU cycles (default) Equal_Per_User Each user s processes get an equal share of CPU cycles Equal_Per_IISAppPool Each IIS application pool s worker process gets an equal share of CPU cycles Equal_Per_Session Each user-session s processes get an equal share of CPU cycles (relates to Terminal Sessions)
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Figure 7-7 The completed new process matching criteria
You can control two types of resource allocation using WSRM: CPU and memory The general procedure for creating a policy is that you assign it a process matching criteria that will tell the policy to which processes it applies, and then allocate a percentage of your overall resources, whether CPU or memory, to those processes Each policy can have multiple associated resource matching criteria and each criterion can then have its own set of resource allocation parameters You can allocate up to 99 percent of the CPU to each process matching criterion, but the total cannot exceed 100 percent The remaining minimal 1 percent is reserved for use by processes placed in the default group NOTE WSRM will not enforce CPU allocation rules until resources begin to get used up Until then, all processes get as much CPU as they want For example, if your server is running only 50 percent CPU utilization, none of your CPU allocation policies will take effect even if you ve specified only that a process should have 20 percent of your CPU resources When your server starts to get closer to its maximum utilization, the processes are constrained based on whatever policy you ve defined
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