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used to start or schedule applications, nor can it manage resource usage of OS processes; only non-OS processes can be managed with WSRM WSRM also has the ability to generate reports These reports can show how many resource-speci c processes users have used, which can be helpful (especially around proving service-level agreements) If you are familiar with WSRM under Windows 2003, the actual con guration and functionality of WSRM is unchanged; the only change is that, under Windows 2003, WSRM was installed from a separate CD and was a separate installation step With Windows Server 2008, WSRM is now a built-in feature that is installed via the Add Features wizard When installed, the Windows Internal Database feature is also installed, which stores resource policies and resource usage for tracking purposes (No con guration is performed during the install) After WSRM is installed, a shortcut is added to the Administrative Tools folder for the WSRM MMC snap-in; upon initialization, select this to connect to the local computer or a remote server
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WSRM is focused around resource allocation policies, which consist of either a number of processes or users to which the resource allocation policy applies You can also use generic resource allocation polices, which are provided out of the box (see Figure 19-30) The policies can be used to con gure resource usage so it s spread equally between the processes, users, or sessions on the system (or even spread over IISAppPool instances on a IIS Web server) These resource allocation policies can then be con gured to manage the resources on the system using the Set as Managing Policy option If you just want to collect data on process usage based on the policy, use the Set as Pro ling Policy action To create your own policy, rst create a new process-matching policy to detail the applications or users/groups that the resource allocation policy will apply to Select Process Matching Criteria in the console tree and select the New Process Matching Criteria action A name is given to the criteria Click the Add button to add a new rule for the matching criteria This can consist of selecting running processes, services, an application, or IIS App Pool (see Figure 19-31), or users or groups can be selected If an application is selected, a le Explorer dialog is opened, allowing executable or COM les to be selected; however, if Running Process is selected, a process list is displayed that allows processes to be chosen from those currently running This is the same for registered services: a list of services is displayed that can be selected for inclusion in the policy Each processingmatching criteria instance can be assigned portions of resources to be
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restricted to Therefore, do not place multiple processes in a singlematching criteria instance that requires separate resource allocations An existing process-matching criterion can be modi ed after it s created by viewing its properties
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FIGURE 19-30 The WSRM main interface
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FIGURE 19-31 Adding a new process-matching criterion
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The next stage to create your own policy is to create a resource allocation policy via the New Resource Allocation Policy action when the Resource Allocation Polices console tree item is selected A name must be given to the policy, and then process-matching criteria are added to the policy Click the Add button to open the Add or Edit Resource Allocation dialog, as shown in Figure 19-32 The General tab allows a portion of the CPU to be allocated to the current process The create resource allocation process keeps track of the amount of CPU currently allocated to processes and displays the amount of remaining CPU that can be allocated The priority of each process-matching criteria is shown in the Priority column when viewing the resource allocation policy in the main WSRM manager; the lower the priority number, the higher the priority (priority 1 is the highest priority resource allocation) Any CPU not allocated to a processmatching criterion is left to the residual bucket, which is effectively available to any other non-OS processes on the system
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FIGURE 19-32 Adding process matches to a resource allocation policy The Memory tab allows con guration around maximum values for working set memory and committed memory Remember that working set memory is the amount of data residing in memory, whereas committed memory is the amount of virtual memory for a process The Advanced tab
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allows processes to be linked to a speci c processor A suballocation of processor resources can also be con gured if multiple processes exist within a single process-matching criterion to spread processor in different ways up to the resource con gured for the process group General suballocations can be speci ed (such as spread evenly over the processes, sessions, or users), or a speci c policy can be created (see Figure 19-33) After the resource allocation policy is created, enable it via Set as Managing Policy action This enforces resource use for the processes on the system that are included in the policy
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