ETERNUS SF Express V15.0 Operation Guide

4.2.1 Overview

This software supports performance management for ETERNUS Disk storage systems. The performance management enables users to get details about the operation and load statuses of devices.

Additionally, by knowing the number of active disks, it is possible to verify the Eco-mode status of the ETERNUS Disk storage system.

Note

• Do not execute performance monitoring for one ETERNUS Disk storage system from more than one server (*) at the same time.

  *: Any of Management Servers of ETERNUS SF Express, Softek Storage Cruiser, ETERNUS SF Storage Cruiser and Systemwalker Resource Coordinator.

• The performance management always starts up when the administrative server starts up. For devices in which performance management settings have been configured, performance information collection starts in the background. Accordingly, performance information is collected regardless of whether the Web Console is started or not. To stop performance information collection, execute performance management stop processing.

4.2.1.1 Performance Information Types

The following information can be managed:

	Performance information	Unit
Logical Volume RAID Group	Read/Write count	IOPS
	Read/Write data transfer rate	MB/S
	Read/Write response time	msec
	Read/Pre-fetch/Write cache hit rate	%
Disk drive	Disk busy rate	%
CM	Load (CPU usage) rate	%
	Copy remaining amount	GB
CM Port	Read/Write count	IOPS
	Read/Write data transfer rate	MB/S
Device	Number of active disks	Disk
	Power consumption	W
	Temperature	C

Note

• If there is a difference between the internal clocks of the administrative server and the target device, a time lag may occur in the performance graph.
  To prevent this phenomenon, we recommend to setup NTP to stay in sync with the administrative server and the target device.

• If restarting a target device during performance management, the device may fail to acquire the correct performance information after the restart.
  We recommend to stop the performance management before restarting a target device.

• Support for Logical Volume and RAID Group performance information varies according to the volume type and the ETERNUS Disk storage system model. However, we cannot guarantee the values for the RAID Group performance information including SDV.

  		DX60	DX80	DX90	DX60 S2	DX80 S2	DX90 S2
  Logical Volume RAID Group	Standard Volume	A	A	A	A	A	A
  	Thin Provisioning Volume Thin Provisioning Pool	N/A	N/A	N/A	N/A	A	A
  	Snap Data Volume Snap Data Pool Volume	N/A	N/A	N/A	N/A	N/A	N/A

  (A=supported, N/A=not supported)

• Performance management cannot be done for ETERNUS Disk storage systems which do not have Logical Volume (LUN).

• The CM Port performance information for the ETERNUS Disk storage system device displays the following information.

  		DX60	DX80	DX90	DX60 S2	DX80 S2	DX90 S2
  CM Port	FC-CA	A	A	A	A	A	A
  	FC-RA	N/A	N/A	A (*1)	N/A	N/A	A (*1)
  	FC-CA/RA	N/A	N/A	N/A	N/A	A	A (*2)
  	iSCSI-CA	A	A	N/A	A	A	A
  	iSCSI-RA	N/A	N/A	N/A	N/A	N/A	A (*1)
  	iSCSI-CA/RA	N/A	N/A	N/A	N/A	A	A (*2)
  	FCoE	N/A	N/A	N/A	N/A	A	A
  	SAS	N/A	N/A	N/A	N/A	N/A	N/A

  (A=supported, N/A=not supported)

  (*1)Performance information during the execution of REC is displayed as follows:

  • It is displayed as Read performance information, if the port is set on the Initiator.

  • It is displayed as Write performance information, if the port is set on the Target.

  (*2)Performance information during the execution of REC includes the following information.

  • Read performance information includes the performance information during the execution of REC, if the port is set on the Initiator.

  • Write performance information includes the performance information during the execution of REC, if the port is set on the Target.

• RDB performance information cannot be displayed in environments that use the REC Disk Buffered Consistency function.

4.2.1.2 Performance Graph Window Types

It is possible to display the following graph.

One-day Graph window

Based on the mean values for 10-minute periods, a line graph for a one-day period is displayed.

Information

• Following performance values are displayed as they are obtained from the device (not their mean values).

  • CM Copy remaining amount

  • Number of active disks

  • Power consumption

  • Temperature

• If the summer time functionality of the operating system is enabled, a part of the graph that is supposed to show the data around the switch to summer time may not be displayed correctly.

• Each performance graph might not be displayed at every monitoring interval of 60 minutes depending on the LAN traffic condition or network environment, for example, the administrative server and target device of the performance monitoring exist in the different subnets.