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Foglight for Storage Management Shared 4.8.5 - User and Reference 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: Collection Target Support Matrix Online-Only Topics

Inferring Physical-Host-to-Storage Relationships

If you want to understand how storage resources are being accessed by the physical hosts in your network, without using agents to monitor the hosts directly, you can enable dependency processing. Dependency processing collects FC switch zone information and LUN connection information from arrays and filers, analyzes each host port used for storage I/O, and infers the (most likely) physical host associated with the port. When dependency processing is enabled, relevant topology diagram are enhanced to show inferred hosts connected to the ports that are used for storage I/O. Connections from inferred hosts are shown as orange or blue lines.

Figure 19. SAN Topology tab

In future, if you decide you want to collect data about inferred physical hosts, you can begin monitoring the hosts by configuring Infrastructure agents. For instructions, see Reviewing Inferred Hosts.

Enabling Dependency Processing

Dependency processing requires that you have VMware Performance agents configured to monitor your vCenters, and that storage collection is enabled on the agents. For more information, see “Configuring VMware Performance Agents” in the Foglight for Storage Management Installation Guide.

To enable dependency processing:
1
On the navigation panel, under Dashboards, click Storage & SAN > Storage Environment.
2
Click the Administration tab.
3
Click Enable Physical Host to Storage Dependency Processing.
4
In the Physical Host Support message box, click Yes.
The dependency processing algorithm collects information and runs a host-resolution process. This may take some time.
When the processing completes, the Enable Physical Host to Storage Dependency Processing Task changes to Disable Physical Host to Storage Dependency Processing Task, and a new task, Review Physical Host FQDNs, appears in the task list.
5
Next Step: Reviewing and Editing Host-Port Assignments

Reviewing and Editing Host-Port Assignments

After enabling dependency processing, it is a good idea to review the list of inferred hosts derived from this process. You can verify that the inferred hosts are correct for the specified port, fix errors, and provide missing host names. For this task, you use the Review Physical Host FQDNs dashboard.

 
* 
NOTE: The Review Physical Host FQDNs dashboard also contains host-port assignment for physical hosts that are being monitored by an agent.
To review the list of hosted identified by dependency processing:
1
On the Storage Environment dashboard, in the Administration tab, click Review Physical Host FQDNs.
The Review Physical Host FQDNs dashboard opens. The table displays the list of hosts, the associated port carrying storage I/O, zone information for switch ports, and the number and type of storage resources accessed. You can filter the contents of the table using the Show Host Ports check boxes.
 
2
To add missing host names or change existing host names:
a
Click the row check boxes for the port assignments you want to change. All selected ports will be assigned the same host name.
b
Click Edit Host FQDN.
c
Type the fully qualified domain name for the host, and click Submit.
The table displays the new host-port assignments.
3
To remove host assignments from ports, select the row check boxes for the ports and click Clear Host FQDN.
•
Clearing a user-resolved host makes the agent-resolved host active, if one exists.
•
Clearing an agent-resolved host adds the host FQDN to a list so that it does not get reassigned to the port in the future.

Running Dependency Processing Manually

If your environment has changed, you can update inferred-host-to-storage connections immediately rather than waiting for a scheduled processing.

 
* 
NOTE: Edited host-port assignments are not affected by these actions.

On the Review Physical Host FQDNs dashboard, use one of the following options:

•
Refresh—Runs the host-resolution analysis to identify inferred hosts for ports handling storage I/O.
•
Collect Zone Information—Dependency processing automatically collects zone information on a nightly basis. If your environment has changed, use this button to collect updated zone information for FC switches in your environment and run the host-resolution analysis. The collection and analysis can take between five to ten minutes, possibly longer depending on the complexity of the environment.
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