Sun Storage 7000 Unified Storage System: Collecting analytics data for iSCSI performance issues

Asset ID:	1-71-1229193.1
Update Date:	2010-10-25
Keywords:

Solution Type Technical Instruction Sure

Solution 1229193.1 : Sun Storage 7000 Unified Storage System: Collecting analytics data for iSCSI performance issues

Applies to:

Sun Storage 7110 Unified Storage System - Version: Not Applicable and later   [Release: NA and later ]
Sun Storage 7210 Unified Storage System - Version: Not Applicable and later    [Release: NA and later]
Sun Storage 7410 Unified Storage System - Version: Not Applicable and later    [Release: NA and later]
Sun Storage 7310 Unified Storage System - Version: Not Applicable and later    [Release: NA and later]
Information in this document applies to any platform.

Goal

To provide guidance on collecting analytics data for troubleshooting iSCSI performance issues

Solution

To review the system and iSCSI performance and possibly an issue associated with it, the following statistic in the analytics will be useful. This is a top level statistic, the support engineer handling your issue may request for any specific statistic as and when the understanding of the issue deepens.

Statistic:

CPU: percent utilization
Cache: ARC accesses per second broken down by hit/miss
Cache: L2ARC accesses per second broken down by hit/miss
Disk: Disks broken down by percent utilization
Disk: I/O operations per second broken down by disk
Disk: I/O bytes per second broken down by disk
Network: interface bytes per second broken down by interface
Protocol: iSCSI bytes per second
Protocol: iSCSI operations per second
Protocol: iSCSI bytes per second broken down by LUN
Protocol: iSCSI operations per second broken down by LUN
Protocol: iSCSI operations per second broken down by size
Protocol: iSCSI operations per second broken down by command
Protocol: iSCSI operations per second broken down by offset
Protocol: iSCSI operations per second broken down by latency

Steps:

1. In BUI under Analytics use "+" icon to add above statistics and save the worksheet with a name eg: 'iscsiperf'. Now you may close the worksheet and datasets will continue to run in the background.
2. After the problem has been observed

Open the saved worksheet

Synchronize all statistics

Pause the statistics, zoom in or out as appropriate to cover time of the problem as well as up to certain extent the normal performance time

Save and Close the worksheet

Use the following command to send out the bundle with worksheet
aksh> analytics worksheets select name=iscsiperf sendbundle

3. Provide the name of the file which was uploaded, the date time and TZ of the problem to the support engineer.

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