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eSight V300R009C00 Operation Guide 10

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Typical Scenarios

Typical Scenarios

Performance Fault Analysis

Storage network analysis presents you detailed information about paths from storage devices to hosts. You can check alarms, performance, and host disks of all components on paths to locate faults, find out the fault causes, and rectify the faults.


Maintenance engineer Jack finds that an application on host responds very slowly and cannot be connected frequently, affecting user experience. After analyzing the storage network, Jack performs the following troubleshooting process.

Figure1 shows the performance fault analysis process.

Figure 10-37 Performance fault analysis process


  • On the storage network analysis page, analyze alarms.
    1. On the menu bar, choose Resource > Storage Subnet.

    2. On the navigation bar, choose SAN Analyzer.
    3. In the navigation tree, choose Global View.
    4. You can perform the following operations to adjust the page for better analysis.
      1. Click the small arrow on the left to collapse all nodes in the navigation tree.
      2. Select Wrap or Symmetric to clearly display topologies.
      3. Select Display threshold alarms. The threshold alarms of all devices are displayed. For details about threshold alarm setting, see Configuring a Threshold Alarm.
      4. For details about meanings of icons, click to display the legend.
  • Find the desired host in the global view and check host alarms and performance.
    1. Enter the host IP address in the search box at the upper right corner of the web page to locate the faulty host.
    2. If the host icon is red and the number of alarms is displayed, the host is faulty. Right-click the host and choose NE Explorer. The NE Explorer is displayed. Then you can analyze the fault cause and clear the alarms based on alarm details.
    3. Click the host. The Real-Time Performance and Historical Performance graphs of the host are displayed below the topology view.
    4. Click Select Indicator. You can view performance trend graphs of desired indicators, such as performance indicators of hosts and host components including network adapters, Fibre Channel ports, and disks.

      Real-Time Performance is used to view real-time performance trend. Historical Performance is used to view the performance trend graph at any point in time last year. You can locate the fault cause by viewing performance trend graphs of host indicators.

    5. View indicator performance trend graphs of Fibre Channel switches and storage devices that are connected to the host. Click the device icon. You can view indicator performance trend graphs of the device and components for troubleshooting.

      The preceding analysis method applies to devices. As it involves a large amount of data, it may fail to locate the fault rapidly. For example, you want to view the port performance of a switch, but the global topology view presents you the performance trend graph of all ports on the switch. It is hard to determine which port is connected to the host. To further locate the port that is connected to the host, perform the following operation to go to the host path graph.

  • Go to the end-to-end host path graph for further analysis.
    1. Click the host. Then right-click the host and choose Host Path Graph from the shortcut menu. The host path graph is displayed.
    2. View the Host-->Disk-->Port-->Switch-->Controller-->Storage Device-->LUN graph.
    3. A host may contain multiple disks. You can set search criteria to search for the disks that affect host services.

      For example, set indicators to Disk IO and Descending and set the time to Latest 10 minutes. Then click the query button. 10 disks whose I/Os wait for the longest time in the latest 10 minutes are displayed. Select a disk and view the end-to-end link graph of the disk.

    4. Click below the host path graph to view the Historical Performance and Real-Time Performance of each component on the link. You can locate the cause to slow response to host services by analyzing components whose performance is abnormal.

Configuring a Threshold Alarm

Threshold alarms of a device need to be checked during live network O&M. Storage network analysis enables you to intuitively view threshold alarms of devices on topologies, facilitating troubleshooting.


When viewing threshold alarms, you can set threshold alarms for devices based on site requirements to facilitate specific analysis.


  1. Choose Performance > Monitoring Settings. The Monitoring Settings page is displayed.
  2. In the navigation tree, select the device type for which you want to set a threshold alarm.

    The preset collection task template is displayed on the right.

  3. Click to edit the preset template.
  4. Set indicator thresholds.
  5. Wait for one collection period, go to the storage network analysis page, and view the threshold alarms.
Updated: 2019-09-07

Document ID: EDOC1100011877

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