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Foglight for Storage Management Shared 4.6 - User and Reference Guide

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Getting Started

Introducing Foglight for Storage Management

Performance Monitoring Capacity Monitoring Connectivity and I/O Performance Monitoring

Navigating Foglight for Storage Management Verifying StorageCollector/Generic SMIS Storage Agents are Collecting Storage Data

Collecting Storage Data for Virtualized Devices and Servers

Understanding Metric Data in Charts and Tables Modifying and Extending Data Collection Next Steps

Monitoring Storage Performance

Introducing the Storage Environment Dashboard Monitoring Your Storage Environment

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

Capacity Trending Evaluating Pool Capacity Environment Summary/Monitoring/Summary Capacity Reports Low Capacity Rule Storage Capacity tab

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 VPLEX 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 an Isilon storage array

Common Component Disk Tab Data

Investigating VPLEX Storage

Introducing VPLEX Virtualization Components Dashboards Investigating Director - Ports Investigating a Virtual Volume Investigating a Storage Volume

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

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.

Bytes per second sent and received though a port.

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.

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.

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

Frame Receive Rate

Average number of frames per second received through a port.

Frame Send Rate

Also Frame Xmit Rate

Average number of frames per second transmitted through a port.

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:

•

•

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.

Current speed of a port in Mb/second.

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

•

•

Frame length 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.

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

Storage Arrays and Filers — Disk I/O Performance Metrics

Rate and latency metrics describe the performance of ports, controllers, pools, LUNs, disks, and NASVolumes. The selection of performance metrics displayed in any given dashboard depends on the selected device type and the metrics available from the device vendor.


	NOTE: For controllers, the Date Rate, Latency, and Ops Rate sets of metrics include Block and File versions as well to track block and file operations separately. For example, Data Rate has Data Rate (File) and Data Rate (Block). These sets of metrics are not included in this table.

Table 11. Disk I/O Performance Metrics
Display Name	Description	Topology Name
% Busy	Also displayed as Pct Busy or Busiest Average percentage of time a component is busy doing I/O during the collection period.	busy
Average Queue Depth	Average number of outstanding I/O operations at the start of each new I/O request in a pool, LUN, or disk.	avgQueueDepth
Cache Hit Rate	Percentage of read operations that can be satisfied from the cache.	cacheHits
L1 Cache Hit Rate	Percentage of read operations that can be satisfied from this cache.	cacheHitRate_L1
L2 Cache Hit Rate	Percentage of read operations that can be satisfied from this cache.	cacheHitRate_L2
Data Rate	Bytes per second read and written.	bytesTotal
Data Read Rate	Bytes per second read.	bytesRead
Data Write Rate	Bytes per second written.	bytesWrite
Disk Latency	Average latency for read/write operations to the disks in a pool, calculated in milliseconds per operation. At the pool level, Avg Disk Latency reflects the average latency for I/O to the physical disks.	latencyTotalDisk
Latency (R/W Latency)	Average latency for read/write operations, calculated in milliseconds per operation. At the pool level, Latency reflects I/O to the pool only. If the block of data to be read is already in a cache, then the latency for that operation is very low, because no disk access needs to be performed. NOTE: Latency is not the sum of read latency and write latency. The number of read operations and write operations is different.	latencyTotal
Other Latency	Average latency for other operations	latencyOther
Read Latency	Average latency for read operations.	latencyRead
Write Latency	Average latency for write operations.	latencyWrite
Ops Rate	Average read and write operations per second.	opsTotal
Read Ops Rate	Read operations per second.	opsRead
Write Ops Rate	Write operations per second.	opsWrite
Other Ops Rate	Other operations per second.	opsOther

Clustered Storage Arrays — Network Performance Metrics

These metrics describe the performance of an EqualLogic array’s network and an Isilon array’s internal and external networks.

Table 12. Network Performance Metrics
Display Name	Description	Topology Name
Link Speed	Current operational speed of the port link.	currentSpeedMb
Max Port Speed	Rated maximum speed of the port	maxSpeedMb
Packet Errors %	Number of incorrectly received data packets divided by the total number of received packets, expressed as a percentage.	packetErrorPercent
Rcv Data Rate	Bytes per second received through a port or group of ports.	bytesWrite
Send Data Rate	Bytes per second sent through a port or group of ports.	bytesRead
Rcv Util	= Rcv Data Rate / Link Speed	bytesWriteUtilization
Send Util	= Send Data Rate / Link Speed	bytesReadUtilization
Rcv Util (% of max)	Also NW Rcv Util (% of max) = Rcv Data Rate / Max Port Speed	bytesWriteUtilizationMax
Send Util (% of max)	Also NW Send Util (% of max) = Send Data Rate / Max Port Speed	bytesReadUtilizationMax

Capacity Metrics

The selection of capacity 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.

Capacity metrics are organized into the following categories:

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Storage Arrays — Array, Member, and Pool Capacity Metrics

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Filers — Filer and Aggregate Capacity Metrics

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

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