When a user gives an instruction for performance management of a target device using the Web Console, the performance management unit for this product saves the device performance data for each device, and stores them as performance data to the Management Server. This performance data is displayed on a graph.
To conduct performance management, sufficient disk space is required on the Management Server for performance data storage. Make sure that sufficient disk space is ensured referring to the ETERNUS SF Installation and Setup Guide.
When performing performance management, configure and start the performance management by using the Web Console.
Enter the range of target Logical Volume (LUN_V) that is obtained for performance information in the Web Console.
Specifying the range of Logical Volume (LUN_V) reduces the effects on the disk area stored performance data and the loads resulting from obtaining performance information.
Refer to "Start/Change Settings of/Stop Performance Monitoring" in the ETERNUS SF Web Console Guide for details on the operation procedures.
Information
Since performance information is obtained internally in units of 64 for Logical Volume, performance information in the neighboring area of the Logical Volume setting is also obtained.
For example, if a range of 70 to 80 is set for Logical Volume (LUN_V) on the screen, the information of Logical Volume between 64 and 127 is obtained internally.
At this time, after instructing it to start the performance management, the monitoring range which is displayed on the Web Console is not the value specified at the start time but the value converted to units of 64.
When starting performance management, "Monitoring" is displayed on the "Performance Monitoring Status".
Refer to "Display Performance Monitoring Status" in the ETERNUS SF Web Console Guide for details on the operation procedures.
The following table shows the value of "Performance Monitoring Status", the corresponding status, and the appropriate actions.
Value of "Performance Monitoring Status" | Status | Appropriate Action |
|---|---|---|
Monitoring | Performance is being monitored. (Normal) | The action is no required. |
Recovering | Performance monitoring is being recovered (e.g. device time-out). | The Express's manager cannot communicate with a disk storage system. |
Error | Performance monitoring error (e.g. device time-out, writing to the performance information file failed.) | The Express's manager cannot communicate with a disk storage system. |
Stop | Performance monitoring has stopped. (Normal) | The action is no required. |
However, the value of "Performance Monitoring Status" may differ in present value. Reload the setting for ETERNUS Disk storage system and make sure the system is up-to-date.
Refer to "Reload ETERNUS Disk Storage System Configuration Information" in the ETERNUS SF Web Console Guide for details on the operation procedures.
The performance information is acquired from ETERNUS Disk storage system at 60 second (fixed) intervals.
Information
In LAN traffic or cross-subnet (where there is a gateway between the performance monitoring target device and the Management Server) situations, it may not be possible to obtain the performance information inside the monitoring interval that was set. Please change the monitoring interval when you cannot acquire performance information on each monitoring interval.
Since the performance management unit is started as a daemon of the Management Server, the unit continues obtaining performance information while the Management Server is active, without starting the Web Console.
The logical configuration of the storage device is recognized, and the obtaining of performance information starts. At the start of obtaining performance information of the selected storage system, an amount of time (tens of seconds to several minutes) is spent to obtain the logical configuration before any performance information is actually obtained.
Confirm by displaying the graph using the Web Console. In addition, the performance information can be output to the CSV format file by using the storageadm perfdata command.
Refer to "Display Performance Information Graph" and "Export Performance Information" in the ETERNUS SF Web Console Guide for details on the operation procedures for Web Console.
Select the number of Logical Volume or RAID Group whose performance information you want to display in graph.
Note
The ETERNUS Disk storage system performance information for SDVs is not supported. The value for the performance information about the RAID Group containing a SDV also cannot be guaranteed.
Select the number of the disk whose performance information you want to display in graph.
Select the CM or CM CPU whose performance information you want to display in graph.
Select the CM Port from a list of ports whose performance information you want to display in graph.
Select the performance information you want to display in graph.
If an I/O delay from the server node to a storage system occurs, the user can check for the cause in the storage system by using the methods described below. These are only examples, so all causes of I/O delays cannot be determined by use of these methods.
Identify the time when the I/O processing delay occurred and the access path where the delay occurred.
Use this software to check the Affinity Group number and Logical Volume number of the ETERNUS Disk storage system defined in the target access path.
Using performance management, display and check the target Logical Volume performance values.
If a response of the Logical Volume unit takes a long time, check RAID Group performance. If a response of RAID Group also takes a long time, find another Logical Volume belonging to RAID Group, and find the LUNs to which the Logical Volume is allocated. Check the I/O statuses of these Logical Volumes, and check for a heavy load on RAID Group. If there is a heavy load, move the appropriate Logical Volume to another RAID Group, or take other appropriate action.
Execute performance management processing on the Web Console.
Refer to "Start/Change Settings of/Stop Performance Monitoring" in the ETERNUS SF Web Console Guide for details on the operation procedures.
Device configuration information is independently maintained in the performance management.
To change the device configuration, update the device configuration information that is maintained by the performance management functionality according to the procedure shown below. Also perform the update if the configuration for a device that has executed performance management has been changed.
Record the performance monitoring settings contents (if performance monitoring is used)
<Recorded settings contents>
Performance monitoring targets (Minimum LUN_V, Maximum LUN_V)
Stop performance monitoring (if performance monitoring is used)
Refer to "4.2.2.7 Instruction for Stopping Performance Management".
Change the configuration for a device that has executed performance management.
Start performance monitoring based on the settings contents recorded in step 1. (if performance monitoring is used).
Make sure to set it to create configuration information.
Refer to "4.2.2.2 Instruction for Performance Management".
Note
If the configuration for a device that has executed performance management has been changed, the configuration information before the change is used for performance management. Performance information cannot be guaranteed prior to the configuration information update.
