Sun Storage Common Array Manager (CAM): How to Collect Performance Data for Sun Storage Arrays

Asset ID:	1-71-1003966.1
Update Date:	2017-05-12
Keywords:

Solution Type Technical Instruction Sure

Solution 1003966.1 : Sun Storage Common Array Manager (CAM): How to Collect Performance Data for Sun Storage Arrays

Applies to:

Sun Storage 6780 Array - Version All Versions and later
Sun Storage 2530 Array - Version Not Applicable and later
Sun Storage 6580 Array - Version All Versions and later
Sun Storage 2530-M2 Array - Version Not Applicable and later
Sun Storage 6140 Array - Version All Versions and later
All Platforms

Goal

This document reviews the procedures for collecting performance statistics from arrays that can be managed using Sun Storage Common Array Manager (CAM). It is intended to provide an overview of the statistics collected.

Solution

Configuring Performance Collection

Using the Browser User Interface (BUI)

After starting CAM and selecting the array, performance settings may be found in the Administration tab -> Performance Monitoring. You can enable or disable monitoring as well as define two (or 3) tunables.

Polling Interval

Set for 1, 5, or 15 minutes. At this interval, the array will be contacted for new array data for all fields, and the management software will be updated with the new statistics. Calculations for statistics will be made over this interval.

Data Retention Period

Set for 1 hour, 2 hours, 4 hours, 1 day, or forever. This setting dictates how long the Peak data will be listed in the output collected. This only affects the collection of peak data until collection is turned off.
Note that CAM does not hold historical performance data. If historical performance data are needed, they need to be manually maintained with a periodic statistics collection, for example using 'sscs list performance' in a cron job.

SET BASELINE (2510 iSCSI only with 7.35 firmware or later)

Clicking the Set Baseline button sets the baseline time to the current array system time, and the counters will display based on the values at that time.

Using the sscs CLI

sscs location:

Solaris: /opt/SUNWstkcam/bin/
Linux: /opt/sun/cam/bin/
Windows: C:\Program Files\Sun\Common Array Manager\bin

Syntax:

sscs modify -a array --status on|off --poll 1|5|15 --retention forever|1HR|2R|4HR|1DAY performance

Example:

# sscs modify -a array --status on --poll 1 --retention 1HR

Listing the tunables

# sscs list -a array -T performance
Array: array
State: On
Polling Interval: 1 minute
Data Retention Period: 1 hour

For the 2510 iSCSI array, running version 7.35 firmware or newer, both resource-type keyword "iperformance" and "performance" can be used to change state for data collection.

Syntax:

# sscs modify -a array --status on|off --poll 1|5|15 --retention forever|1HR|2R|4HR|1DAY --baseline true|false iperformance

Example:

# sscs modify -a array --status on --poll 5 --retention forever --baseline true iperformance

Listing the tunables

# sscs list -a array -T performance
Array: s2510-a
State:                  On
Polling Interval:       5 minutes
Data Retention Period: Forever

ARRAY NAME:   s2510-a
======================

BASELINE STATISTICS
======================
Controller B Baseline Time:       January 18, 2013 1:39:15 PM EST
< . . . . >

Collecting & Viewing Statistics

Collecting array statistics using the BUI

Expand Storage Systems
Expand Your Array Name
Expand Administration
Click Performance Monitoring

Collecting array statistics using sscs

# sscs list -a array --type array_stats performance

Collecting array statistics using sscs for 2510

# sscs list -a array --type array_stats --baseline true|false iperformance

Collecting controller statistics using the BUI

Expand Storage Systems
Expand Your Array Name
Expand Physical Devices
Click Controllers
Click View Performance Statistics button

Collecting controller statistics using sscs

# sscs list -a array --type controller_stats performance

Collecting controller statistics using sscs for the 2510

# sscs list -a array --type controller_stats --baseline true|false iperformance

Collecting volume statistics using the BUI

Expand Storage Systems
Expand Your Array Name
Click Volumes
Click View Performance Statistics button

Collecting volume statistics using sscs

# sscs list -a array --type volume_stats -g hostgrp -h host -v volume performance

Collecting volume statistics using sscs for the 2510

# sscs list -a array --type volume_stats -g hostgrp -h host -v volume --baseline true|false iperformance

Note that the hostgrp, volume, and host values may be comma delimited for listing multiple hosts, hostgroups, or specific volumes. Without these options, the output will list all array volumes and their performance statistics.

There was a problem where performance statistics were not reported (all zero values) for any volumes not owned by the controller gathering the statistics. This was resolved in CAM release 6.8.
Reference Internal Oracle <Bug 15654610>

Statistics Definition

The statistics available are the same for any collection. They are defined as follows for a given object name for the given interval:

Statistic	Definition
TOT IOPS	Total IO's Per Second over the polling interval
Average IOPS	The average number of inputs and outputs per second over the retention period
READ %	Percent of Total IOPS that were reads over the polling interval
WRITE%	Percent of Total IOPS that were writes over the polling interval
TOT DATA	Total Amount of Data transferred in KB over the polling interval
READ	Total amount of KB read during polling period
AVG R SIZE	Average Read Size in KB during polling period
READS/s	Number of Reads per second during polling period
PEAK R/s	The highest number of Reads per Second during the retention period
WRITTEN	Total amount of KB written during the polling period
AVG W SIZE	Average Write size in KB during polling period
WRITES/s	Number of Writes per second during polling period
PEAK W/s	The highest number of Writes per Second during the retention period
CACHE%	The percentage of total I/Os that are processed with data from the cache rather than requiring a read from drive

Additional Statistics for 2510 Arrays

The following table describes the fields on the iSCSI Ethernet-MAC Performance Statistics page.

Field	Indicates
Controller A boot time	Date and time when Controller A was last booted
Controller B boot time	Date and time when Controller B was last booted
*MAC Transmit Statistics*
Port	The iSCSI port used to transmit and receive data
F	Frame Count
B	Byte Count
MF	Multicast frame count
BF	Broadcast frame count
PF	Pause frame count
CF	Control frame count
FDF	Frame Deferral Count
FED	Frame excess deferral count
FLC	Frame late collisions count
FA	Frame abort count
FSC	Frame single collision count
FMC	Frame multiple collision count
FC	Frame collisions count
FDR	Frame Dropped Count
JF	Jumbo Frame count
*MAC Receive Statistics*
Port	iSCSI port used to transmit and receive data
F	Frame Count
B	Byte Count
MF	Multicast Frame Count
BF	Broadcast Frame Count
PF	Pause Frame Count
CF	Control Frame Count
FLE	Frame Length error count
FDR	Frame Dropped count
FCRCE	Frame CRC error count
FEE	Frame Encoding Error count
LFE	Large frame error count
SFE	Small frame error count
J	Jabber count
UCC	Unknown control frame count
CSE	Carrier Sense error count

Do you still have questions? You can use My Oracle Support Communities. Communities put you in touch with industry professionals like yourself. They are monitored by Oracle support engineers, so you can expect reliable and correct answers. Ask questions and see what others are asking about in the Disk Storage 2000, 3000, 6000 RAID Arrays & JBODs Community.

Attachments

This solution has no attachment