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Page 103 © Copyright 2019 Dell Inc. Lab Exercise: Host I/O Limits Setup Dell EMC Unity Implementation and Administration Lab Guide Change the frequency range to Real Time . Wait at least 1 minute for the graphic to refresh and populate with information. Both I/O measures should default to zero since there is no write activity from the Host to this LUN at the moment. Both I/O measures should default to zero since there is no write activity from the Host to this LUN at the moment. 8. From the Student Desktop system taskbar, open an RDC session to WIN1. In the Computer(s): WIN1 Click the Connect button. From the Windows Security window, select More choices . Select Use a different account. From the Enter your credentials window, input the following: Username: \ administrator Password: emc2Local! Click Ok. 9. From the WIN1 system taskbar open File Explorer . Expand the Local Disk (C: ) tree and open the Big_Files folder. There are some large files that are located in this folder which will be used to generate some write I/O to the WIN1 LUN0 . 10. Highlight, right-click and copy the four 1 GB files. 11. Highlight, right-click and copy the four 1 GB files. Paste the files into the drive. Wait for the copy operation to complete. [email protected]
Page 104 © Copyright 2019 Dell Inc. Lab Exercise: Host I/O Limits Setup Dell EMC Unity Implementation and Administration Lab Guide 12. Return to the Unisphere session. Observe in the graphic the Bandwidth KB/s and Throughput IO/s used by the host to perform the copy operation. Close the WIN1 LUN0 Properties window. 13. Return to the RDC session to WIN1 . Delete all of the 1 GB files that were copied to the folder. Close the window. This completes part 1 of the lab exercise. [email protected]
Page 105 © Copyright 2019 Dell Inc. Lab Exercise: Host I/O Limits Setup Dell EMC Unity Implementation and Administration Lab Guide Create a Host I/O Limits Policy for a LUN In this part of the lab, you create a Host I/O Limits policy and associate it to WIN1 LUN0 . 1. Open Unisphere session to UnityVSA-Source.Navigate to System > Performance > Host I/O Limits . Navigate to System > Performance > Host I/O Limits . 2. On the Host I/O LImits page, you can define Host I/O Limit policies. Limiting I/O bandwidth and throughput provides more predictable performance in system workloads between hosts, their applications, and storage resources. Click the + icon to create a limit. The Create Host I/O Limit wizard opens. 3. You can limit I/O traffic to block storage resources (LUNs, Consistency Groups) by setting a threshold here (throughput and/or bandwidth). In the Provide a Name and Limits section enter the configuration information for a new Host I/O Limit policy: Name: Silver_Policy Description: Good (Class Service) Shared: Unchecked Limit Type: Absolute Limit (radio button selected) Maximum IO/S: 800 Maximum Bandwidth: 9000 KBPS Click Next to continue the wizard.

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