Checking the operating status of volumes in the performance graphs

You can display and check the operating status of each volume with respect to IOPS, response time (time required to respond to a server request), and transfer rate. You can also download the contents of each performance graph as a CSV file.

1. In the dashboard or in the navigation bar, click Servers. If you are not using Storage Advisor Embedded to manage servers, click Volumes in the dashboard or in the navigation bar, and then skip to step 3.
2. Click the server name to open the server details page.
3. Click the volume name to open the volume details page.

   If VSP Fx00 models or VSP Gx00 models are used and the QoS settings are enabled for volumes, the items displayed in the volume details window and the Performance Monitor tab differ from those in normal times.

4. On the Performance Monitor, check the operating status based on the graphs of IOPS, response time, and transfer rate.

   The volume details window has the following configuration.

   

   • Volume overview

   • Contents of QoS settings

     If using VSP Fx00 models or VSP Gx00 models, QoS information appears only when QoS settings are enabled.

     The occurrence time displayed in the QOS ALERT TIME tab is the time that the last alert was issued.

     Note:

     • If you use the web-based user interface, the date and time when an alert was issued are displayed based on the time zone set for the system of the management client. If you use the REST API, the data and time are returned based on Coordinated Universal Time (UTC).

     • If you change the time zone of the storage system, the times displayed for alerts that were issued before the change will be invalid.

   

   • Activity status performance graph

     If using VSP Fx00 models or VSP Gx00 models with QoS settings for volumes enabled, the items displayed in the performance status graph are different from those usually displayed.

     The information displayed when QoS settings are enabled are as follows.

     Performance Monitor tab (IOPS)

     Displayed item	Description
     Received	Number of commands requested from the server
     Completed	Number of commands processed by the storage system
     Upper Limit	Value specified for IOPS UPPER LIMIT
     Lower Limit	Value specified for IOPS LOWER LIMIT

     Performance Monitor tab (Response Time)

     Displayed item	Description
     Actual Time	Time required to respond to a request from the server
     Target Time	Value specified for TARGET RESPONSE TIME

     Performance Monitor tab (Transfer Rate)

     Displayed item	Description
     Received	Data transfer speed for commands requested from the server
     Completed	Actual data transfer speed with which the storage system processed the commands
     Upper Limit	Value specified for TRANSFER RATE UPPER LIMIT
     Lower Limit	Value specified for TRANSFER RATE LOWER LIMIT

     CAUTION:

     • I/O information between the server and the storage system is monitored, but I/O information between storage systems is not monitored.

     • The times displayed in performance graphs are the times when data was measured by the storage system, instead of the standard displayed times (times when data was acquired by the client).

   Note:

   Performance reports might not show the current information if performance data is not obtained from the storage system. This issue should resolve itself after some time when the storage system is less busy.