Foglight for Storage Management Shared 4.4.5

Chat now with support

Understanding Status, Alarms, and Rules in Foglight for Storage Management Reviewing the Status of All Devices Assessing Storage Alarms Monitoring Fabrics Monitoring Storage Arrays Monitoring Filers

Asking Questions About the Monitored Storage Environment Assessing Connectivity and I/O Performance

Introducing the Virtualization Dashboards Summary of Icons Used in Topology Diagrams Exploring Connectivity with SAN Topology Diagrams Exploring I/O Performance with SAN Data Paths

Monitoring Storage Capacity

Creating Storage Reports

Investigating Storage Devices

Introducing the Storage Explorer Exploring a Fabric Exploring a Switch Exploring a Cisco VSAN Exploring a Filer Exploring a Storage Array

Non-Clustered Storage Arrays Dell EqualLogic Storage Array EMC Isilon Storage Array

Common Data for Filers and Storage Arrays

LUNs tab Disks tab Advanced Find

Investigating Storage Components

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

Pool belonging to a non-clustered storage array or EqualLogic storage array

Pool belonging to a non-clustered storage array or EqualLogic storage array Pool belonging to an Isilon storage array

Common Component Disk Tab Data

Troubleshooting Storage Performance

Starting a Troubleshooting Investigation Analyzing Storage Issues Analyzing the Pool Changing Latency Thresholds Understanding the Troubleshooting Algorithm

Managing Data Collection, Rules, and Alarms

Collecting Virtual Storage-to-SAN Relationships Inferring Physical-Host-to-Storage Relationships

Enabling Dependency Processing Reviewing and Editing Host-Port Assignments Running Dependency Processing Manually Customizing Helper Strings for Dependency Processing Reviewing Inferred Hosts

Modifying Data Collection Schedules

Understanding Data Collection Types and Schedules

Topology collections Performance collections Default data collection schedules

Modifying Data Collection Schedules for Storage Collector Agents

Creating a unique schedule for an agent Assigning a Cloned Schedule to Another Agent

Managing Foglight for Storage Management Rules Managing Alarm Settings

Changing Alarm Sensitivity Configuring Email Notifications for Alarms

Troubleshooting Database Limits

Understanding Metrics

Units of Measurement Performance Metrics

Fabrics and FC Switches — Performance Metrics Storage Arrays and Filers — Disk I/O Performance Metrics Clustered Storage Arrays — Network Performance Metrics

Capacity Metrics

Storage Arrays — Array, Member, and Pool Capacity Metrics

EMC Isilon Only Capacity Metrics

Filers — Filer and Aggregate Capacity Metrics Storage Arrays and Filers — LUN, NASVolume, and Disk Capacity Metrics

Overview of Metrics in Foglight for Storage Management

Summary of SAN Topology Objects Locating SAN Topology Objects in Foglight for Storage Management

Online-Only Topics

Storage Environment Dashboard Storage Explorer Pool and Aggregate Dashboards

Understanding Metrics

This section defines the metrics displayed in the Storage & SAN dashboards. It also provides an overview of metrics in Foglight for Storage Management—you need this information if you intend to create new rules or custom dashboards.

This section contains the following topics:

•

Units of Measurement

•

Performance Metrics

•

Capacity Metrics

•

Overview of Metrics in Foglight for Storage Management

Units of Measurement

Foglight for Storage Management uses the following units of measurement:

•

B/s — Number of bytes per second. Frequently converted to KB/s or MB/s.

•

ops/s — Number of operations per second.

•

ms — Milliseconds. Frequently converted to μs (microsecond).

•

m — milli — Thousandth.

•

ms/op — Milliseconds per operation.

•

MB — Capacity metrics are captured in MB (megabytes), but are frequently displayed in GB (gigabytes) or TB (terabytes).

Performance Metrics

In general, performance is gauged in terms of rates (such as data rates, ops to disk rates, frame rates), latency, and utilization. The selection of performance metrics displayed in any given dashboard depends on the selected device type and the metrics available from the device vendor.

The following tables define each metric and shows the topology name for the metric. You need the topology name when referencing the metric in user-defined rules and dashboards.

Performance metrics are organized into the following categories:

•

Fabrics and FC Switches — Performance Metrics

•

Storage Arrays and Filers — Disk I/O Performance Metrics

•

Clustered Storage Arrays — Network Performance Metrics

Fabrics and FC Switches — Performance Metrics

For fabrics and switches, performance is assessed in terms of send and receive values for the FC switch ports and is expressed as the average number of bytes per second or frames per second. Port errors are also an important indicator of port performance, because a higher number of errors correlates with lower send and receive values.

Table 10. Performance metrics

A range of normal values, as determined by IntelliProfile by looking at historical data for the same time range. A baseline range displays after seven days of data collection.

n/a

Data Rate

Bytes per second sent and received though a port.

bytesTotal

Data Receive Rate

Average number of bytes per second received through a port. The data rate, compared against the Baseline of typical activity, indicates whether the current traffic is typical or out of the norm.

bytesRcvd

Data Send Rate

Also Data Xmit Rate

Average number of bytes per second transmitted through a port. The data rate, compared against the Baseline of typical activity, indicates whether the current traffic is typical or out of the norm.

bytesXmit

Frame Rate

Average number of frames per second received and transmitted through a port.

framesTotal

Frame Receive Rate

Average number of frames per second received through a port.

framesRcvd

Frame Send Rate

Also Frame Xmit Rate

Average number of frames per second transmitted through a port.

framesXmit

Link Error Rate

Average number of link errors per second on a port. Link errors are caused by or affect the link status of the connection. Link errors include:

•

Link resets

•

Loss of signal on the port

•

Loss of synchronization

If an error rate value is very small, it may be displayed as 0.0. If a fabric or switch has an actual error rate of 0, it is not displayed.

errorsLink

Link Speed

Current speed of a port in Mb/second.

currentSpeedMb

Non-Link Error Rate

Average number of non-link errors per frame on a port. Non-link errors include:

•

Resource constraint that causes frames to be retried

•

CRC errors

•

Frame length errors

•

Address errors

If an error rate value is very small, it may be displayed as 0.0. If a fabric or switch has an actual error rate of 0, it is not displayed.

nonLinkErrors

Rcvd Utilization

= Data Receive Rate / Link Speed, expressed as a percentage. Utilization values help you identify ports that may be overloaded.

bytesRcvdUtilization

Xmit Utilization

= Data Send Rate / Link Speed, expressed as a percentage. Utilization values help you identify ports that may be overloaded.

bytesXmitUtilization

Please select your product:

To serve you better, please complete the Purpose of your Chat:

Recommended Solutions for Your Problem

Foglight for Storage Management Shared 4.4.5 - User and Reference Guide

Understanding Metrics

Units of Measurement

Performance Metrics

Fabrics and FC Switches — Performance Metrics