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Foglight for Storage Management Shared 7.3.0 - User Guide

Getting Started Configuring Agents to Monitor Storage Devices
Brocade SAN Switches Cisco SAN Switches Dell Compellent Arrays Dell EqualLogic PS Series Array Groups EMC CLARiiON CX Series Arrays (CLI) EMC CLARiiON, VNX, or VMAX Storage Arrays (SMI-S) EMC Isilon EMC VPLEX Hitachi Data Systems AMS, USP, and VSP HP EVA Storage Arrays HP 3PAR Arrays NetApp Filers Configuration Procedures
Managing Agents Using Foglight for Storage Management Monitoring Storage Performance Investigating Storage Devices Investigating Storage Components Investigating VPLEX Storage Troubleshooting Storage Performance Managing Data Collection, Rules, and Alarms Understanding Metrics Appendix: Supported Storage Devices Table

Changing Latency Thresholds

One way Foglight for Storage Management determines if the performance problem is occurring in the SAN storage environment is to evaluate latency against the thresholds defined for latency in registry variables. The latency thresholds used for analysis are, by default, the same thresholds as are used for generating latency alarms. If you think it would be helpful to adjust the threshold values for your analysis, you can change the threshold values using the Storage Troubleshooting dashboard. The original registry variables are not updated.

 
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TIP: If you change thresholds, you can restore the default values later using the Reset button.
To change the latency thresholds:
1
In the Storage Troubleshooting dashboard, click Edit Thresholds.
2
Specify the new thresholds in milliseconds for one or both of Warning and Critical.
3
Click Apply.

Understanding the Troubleshooting Algorithm

To determine if the problem is likely to be a storage performance problem, Foglight for Storage Management evaluates latency metrics against thresholds and typical performance, and disk extent metrics against the I/O being performed to the extent by the virtual machine. If the likely cause of the problem is slow performance in the SAN Storage environment, Foglight for Storage Management examines the LUN or NASVolume. If no circumstances, such as a rebuild, are identified as a cause of high latency, the pool is examined.

Managing Data Collection, Rules, and Alarms

 
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NOTE: This section is intended for users with the role Storage Administrator. Some tasks also require the Foglight for Storage Management role of Administrator (as noted) to manage agents and rules.

You can collect additional types of relationship data, change collection schedules, manage rules, and manage alarms.

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Collecting Virtual Storage-to-SAN Relationships
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Inferring Physical-Host-to-Storage Relationships
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Modifying Data Collection Schedules (Administrator role required)
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Managing Foglight for Storage Management Rules (Administrator role required)
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Managing Alarm Settings
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Troubleshooting Database Limits

If you are looking for information about configuring Foglight for Storage Management agents and agent masters, reviewing agent alarms, creating support bundles, or backing up data, see the Foglight for Storage Management Installation Guide.

Collecting Virtual Storage-to-SAN Relationships

To include virtual storage-to-SAN relationships in your topology diagrams, you need to enable storage collection on your VMware or Hyper-V Performance agent. If you did not enable this option when defining the agent, you can enable it by editing the agent.

 
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NOTE: If you cannot see the Administration dashboards, ask your Foglight for Storage Management Administrator to add the role VMware Administrator or Hyper-V Administrator to your user account.
To update an existing virtualization agent to add the collection of storage data:
1
On the navigation panel, under Dashboards, click VMware > VMware Agent Administration or Hyper-V > Hyper-V Agent Administration.
2
In the Agents table, locate the Agent. In the Data Collection column, you can see whether general data collection is enabled for this agent. Storage data collection, however, is not enabled by default.
3
To enable storage data collection for an agent, click the agent’s Edit icon.
4
Select the Enable Storage Collection check box and click Save.
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