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Foglight for Storage Management Shared 4.6.5 - User and Reference Guide

Getting Started Monitoring Storage Performance Investigating Storage Devices Investigating Storage Components Investigating VPLEX Storage Troubleshooting Storage Performance Managing Data Collection, Rules, and Alarms Understanding Metrics Online-Only Topics

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.

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

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

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Refresh—Runs the host-resolution analysis to identify inferred hosts for ports handling storage I/O.
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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.

Customizing Helper Strings for Dependency Processing

Zone names are set by the Storage Administrator and typically include the names of devices connected to ports. The dependency processing algorithm processes the zone name strings using various helper strings to identify the possible host names associated with a port. A DNS lookup is performed on the possible names to identify the most likely host FQDN. You can customize the helper stringers for your environment and improve the accuracy of the inferred hosts.

To customize helper strings for dependency processing:
1
On the Storage Environment dashboard, in the Administration tab, click Review Physical Host FQDNs.
2
Click Change Zone Processing Params.
The Edit Parameters for Zone Info Processing dialog box opens.
3
To specify IP addresses to ignore during dependency processing, click Invalid IPs. Click Add, specify an IP address, and click Add.
Some DNS setups always return a default IP address when a DNS lookup of a possible host name fails. If a DNS lookup of a host name returns an IP address listed in the Invalid IP table, the host name is considered invalid for dependency processing purposes.
4
To specify strings that may be included in the zone information, but are known not to be host names, click DNS Exclude Strings. Click Add, specify a string, and click Add.
5
To specify strings used as separators for readability in the zone names, click Split Strings. Click Add, specify a string, and click Add.
6
To specify strings that you want to convert to other strings before performing a host name DNS lookup, click Translation Strings. Click Add, specify a string found in the zone information and the new string to use, and click Add.
7
When you are finished customizing parameters on all tabs, click Save.
Dependency processing begins. Zone information is collected using the changed parameters and host-resolution analysis is performed.

Reviewing Inferred Hosts

You can see a list of inferred hosts on the Infrastructure dashboard. From this dashboard, you can explore hosts and change their host port assignments if necessary. If you are interested in monitoring and collecting detailed data about an inferred host, you can set up an agent to monitor the host. This action moves the host from the inferred list to the appropriate monitored host list.

For more information about the Infrastructure dashboard, see the Managing the Infrastructure Cartridge section of the Foglight for Storage Management online help.

To review inferred hosts:
1
On the navigation panel, under Dashboards, click Infrastructure.
2
In the Select a Service list, select All Hosts.
3
In the Monitoring tab, click the Inferred tile.

4
In the quick view, click a host in the Inferred list and then click Explore.
5
Click the SAN Topology tab.
The SAN Topology tab displays the connections to the LUNs identified through dependency processing.
6
Click a Cloud icon to show the connections through a port in a Details window.
An orange line connecting a host to a port indicates that the host is an inferred host.
7
If the assigned host is incorrect, click the Host Port icon and select the desired action, such as Assign to Different Host or Remove Link to Host.
8
Close the Details window.
9
If you want to set up an agent to monitor this host, click the Monitor tab.
 
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NOTE: If your user credentials do not include the role Administrator, you need to ask someone with this role to create an agent to monitor the host.
10
Click Configure Host Monitoring.
11
In the Add Monitored Host wizard, follow the online instructions to add the host.
For help with the wizard, see “Adding a Monitored Host” in the Managing the Infrastructure Cartridge section of the Foglight for Storage Management online help.
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