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Foglight for Storage Management Shared 4.7 - 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 Collection Target Support Matrix 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 Online-Only Topics

LUNs tab

Common Data for Filers and Storage Arrays

A LUN (logical unit) is the block storage element made available by an array or filer to a server.

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Show LUNs With …
This view lets you quickly see the top 15 LUNs with a selected metric, averaged over the selected time period.
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Selecting the time period “for current” shows the LUNs with the worst current metric.
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Selecting the time period “last 30 minutes, last hour, last 4 hours” shows the LUNs with the worst average values in that time period.
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NOTE: The selected time range looks at the average of values from collections that completed between the time at the end of the zonar, and the selected period before that.
The bars in the Average column show the values of the other items' metric relative to the first (highest) item.
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NOTE: The metrics available in the drop down for selection include only the metrics made available by that particular array or filer vendor.
Click on a name in the table, and summary details about that item will be displayed in details panel below. This panel will display the exact time period of the completed collections in the selected time range.
To further investigate the selected LUN, click Explore in the details panel. See Investigating a LUN.
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Alarm Summary. Displays alarms on LUNs, disks. To investigate further, click an alarm. See Assessing Storage Alarms.

Disks tab

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Show Disks With...
This view lets you quickly see the top 15 disks with a selected metric, averaged over the selected time period.
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Selecting the time period “for current” shows the disks with the worst current metric.
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Selecting the time period “last 30 minutes, last hour, last 4 hours” shows the disks with the worst average values in that time period.
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NOTE: The selected timerange looks at the average of values from collections that completed between the time at the end of the zonar, and the selected period before that.
The bars in the Average column show the values of the other items' metric relative to the first (highest) item.
* 
NOTE: The metrics available in the drop down for selection include only the metrics made available by that particular array or filer vendor.
Click on a name in the table, and summary details about that item will be displayed in the Details panel below. This panel will display the exact time period of the completed collections in the selected time range
To further investigate the selected disk, click Explore in the details panel. See Investigating a Physical Disk.
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Alarm Summary. Displays alarms on disks. To investigate further, click an alarm. See Assessing Storage Alarms.

Advanced Find

The tabs for specific entities (like LUNs, Disks, Pools, NASVolumes) quickly identify the Top 15 objects exhibiting the “worst” values for a particular metric. Often, however, there is a need to locate objects by name, or with other characteristics. Use the Advanced Find functionality to locate these items.

Queries can be constructed using a combination of Property conditions and Metric conditions.

Figure 16. Advanced Find
Using the Property Conditions
Finding Entities by Name
To find entities by name:
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Select the desired entity type to search for in the Find drop down.
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Type the string to search for in the Name Like field.
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Click Perform Query.
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All items with that string anywhere in their name will be returned.
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_ is a positional wildcard, that can match a single character. For example, C_D would match decode, but would not match record
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% is a non-positional wildcard. For example, C%D would match record
Finding Entities with Current Status or Physical State

To find entities with current status or physical state:

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Select the desired entity type to search for in the Find drop down.
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In Properties, check the status boxes to retrieve entities with that status or state.
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Click Perform Query.
For example, This example searches for LUNs whose names include a particular string, and have a non-normal alarm state.
The query will take a short time to execute. When it completes, the Latest Query panel will summarize the query conditions. The Query Result panel will display the LUNs found to match the query conditions. The table header displays the time period used for evaluating the query conditions.
Figure 17. Query Conditions
Using the Metric Conditions

The metric conditions area lets you easily construct a more complex query that can include up to 3 conditions on metrics.

Figure 18. Metrics conditions
To use the metric conditions:
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Period. Refers to the time range on the zonar displayed in the upper right-hand corner. Select the time the query should use for the metric values. When n/a is selected, this condition is ignored.
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Metric. This drop down shows the metrics available for this entity type for this vendor.
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The third drop down list provides the comparison operator.
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Use the fourth field to enter the value to use for the comparison.
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Use the fifth drop down to select the units for the value you entered. The units selection will change based on the type of metric selected.
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Click the + icon if you want to add another condition. The next condition row will be preceded by a AND/OR selector. A trash can icon will appear to the right of the + icon to let you remove a condition.
Up to 3 conditions can be defined. When the + icon is clicked to display the 3rd condition row, parentheses will be displayed around the first 2 conditions, indicating the order of evaluation.
For example, the following query looks for LUNs that had low average latency during the period, but had a higher latency at the last collection.The query will take a short time to execute. When it completes:
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The Latest Query panel will summarize the query conditions.
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The Query Result panel will display the LUNs found to match the query conditions. The table header displays the time period used for evaluating the query conditions. The metrics used in the query conditions will be displayed in the results table.
To investigate further
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Click the name of an entity in the table, to drill down to the explorer view for that entity.
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Click on an alarm Status icon, to display the alarms for that entity.

 

 

Investigating Storage Components

To gain a complete picture of the performance of a storage device, you need to understand how its child components are performing.

This section covers the following topics:

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Introducing Storage Component Dashboards
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Investigating an Aggregate
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Investigating an Array/Filer Port
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Investigating a Controller
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Investigating a Directory
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Investigating an EqualLogic Member
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Investigating an FC Switch Port
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Investigating an Isilon Node
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Investigating a LUN
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Investigating a NASVolume
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Investigating a Physical Disk
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Investigating a Pool
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