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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

Topology collections

During topology collections, Foglight for Storage Management gathers basic information regarding each object and its child objects. For example, on an array object, LUN, disk, and children information is gathered. Foglight for Storage Management gathers various attributes and parameters (for example, size or capacity) as well as relationship data. This relationship data is the key to understanding the basic topology and interconnects, or paths, between objects (parent to parent, child to parent and, where appropriate, child to child). Without this relationship information performance analysis would not be possible.

Performance collections

During performance collections, Foglight for Storage Management gathers the following basic types of information:

•
Performance metrics for each known object (an object is known if it has previously been collected during a topology collection).
•
The performance collection enumerates objects and their children. This enumeration determines if there is any change in the topology (for example, a LUN has been created, a new ESX server has been added to a cluster, or a new VM has been created). As the collector recognizes changes in the environment (sometimes in conjunction with the server) it schedules topology collections to ensure that Foglight for Storage Management continually has an accurate understanding of the underlying topology. Not all topology changes can be detected by the performance collection. A scheduled topology collection will pick up any undetected changes.

Default data collection schedules

Storage Collector agents have a default schedule for topology and performance collections, as described in the following table.

 
Table 20. Default data collection schedules.
Type
Collection Interval
Notes
Topology collection

3 hours

n/a

Performance Collection for EMC SMI-S and Hitachi AMS only

15 minutes

Defines the collection interval for an agent that monitors a storage device using SMI­-S or Hitachi AMS. The management hosts from which the Storage Collector agent collects performance data using SMI-S obtain performance data from the arrays every 15 minutes. Setting the agent to collect data more frequently is inefficient, because the same data is re-collected and discarded.

Performance Collection for all others

10 minutes

Defines the collection interval for an agent that uses a different method (than those listed above) to monitor a storage device.

For information about the technologies used by Storage Collector agents to monitor the different kinds of storage devices, see “Configuring Agents to Monitor Storage Devices” in the Foglight for Storage Management Installation Guide.

Modifying Data Collection Schedules for Storage Collector Agents

 
* 
NOTE: You require the Foglight for Storage Management role Administrator to perform tasks that affect agents.

The collection interval can be increased to reduce the collection frequency impact in busy environments. It is not recommended to reduce the performance collection interval to less than five minutes. You can change the schedule for all agents by editing the default schedule, or clone the default schedule to create and select a specific schedule for a Storage Collector agent.

To modify storage collection schedules:
1
On the navigation panel, under Dashboards, click Administration > Agents.
2
Click Agent Status.
The Agent Status dashboard opens.
3
Select the agent whose schedule you want to change from the Agent Status view. You can select any Storage Collector agent if you are changing the default schedule.
4
Click Edit > Edit Properties.
The Agent Status view displays.
5
Select Modify the properties for this agent only.
6
Scroll down to the Data Collection Scheduler section.
From here you can perform the following agent editing tasks:
•
To edit an existing schedule, continue with this procedure.
•
To create a unique schedule for an agent using clone, see Creating a unique schedule for an agent.
•
Assign a cloned schedule to another agent, see Assigning a Cloned Schedule to Another Agent.
7
From the Data Collection Scheduler drop-down, select the schedule you want to edit.
8
Click Edit.
The Storage Collector-<scheduleName> dialog box opens.
9
Click inside the field you want to edit and make the required changes.
10
Click Save Changes.
11
Close the Storage Collector-defaultSchedule dialog box.
12
Click Back to Agent Status.
The edit is complete.
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