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• Foglight for Storage Management Shared 4.4.5
• Foglight for Storage Management Shared 4.4.5 - User and Reference Guide

Foglight for Storage Management Shared 4.4.5 - User and Reference Guide

Table of Contents  

Getting Started

Introducing Foglight for Storage Management

Performance Monitoring Capacity Monitoring Connectivity and I/O Performance Monitoring

Navigating Foglight for Storage Management Verifying Storage Collector 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 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

• Viewing Topics 97 - 100 of 110

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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:

•	Storage Arrays — Array, Member, and Pool Capacity Metrics

•	Filers — Filer and Aggregate Capacity Metrics

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

Storage Arrays — Array, Member, and Pool Capacity Metrics

The following table contains the capacity metrics you may see displayed for storage arrays, members/nodes, and pools.

 

NOTE: To view the metrics for EMC Isilon arrays (which are significantly different than other arrays), see EMC Isilon Only Capacity Metrics.

 

Table 13. Array, Member, and Pool Capacity Metrics

Capacity Metric	Description	A	M	P	Topology Name
Total Advertised LUNs Size	Also Advertised LUNs Size Sum of the Advertised LUN Size for all LUNs in the entity.				conf_LunSize
Available Raw Capacity	Capacity available in the pool that has not been committed to data, snapshots, or thick-provisioned LUNs. Raw counts all the disk blocks available, before applying RAID.				raw_available
Available Usable Capacity	Also Available Capacity Capacity available in the pool that has not been committed to data, snapshots, or thick-provisioned LUNs. Usable means after applying RAID.				conf_available
Capacity Provisioned to LUNs	Also Provisioned to LUNs Capacity used for LUN data. Does not include capacity that is used for snapshots, reserves, etc. • For thin-provisioned LUNs, this is the capacity used for data written to the LUNs. • For thick-provisioned LUNs, this is the capacity allocated to the LUNs, and does not reflect data written Formerly displayed as Consumed Capacity.				Array: lun_usable_capacity Pool: conf_used
Overcommitment	= Total Advertised LUNs Size – Total Usable Capacity Overcommitment reflects the minimum additional capacity needed in the pool to support the advertised capacity promised to thin-provisioned LUNs. When the value of overcommitment is greater than zero, you run the risk of I/O writes failing because of insufficient physical storage to support the demand. Overcommitment is available only for arrays where the vendor provides the total usable capacity.				conf_LunOvercommitted
Total Disk Capacity	Sum of the sizes of the disks in the array. This includes spares.				disk_capacity
Total Raw Capacity	Total capacity of the pool in raw terms. Raw counts all the disk blocks allocated to the pool, before applying RAID.				raw_capacity
Total Usable Capacity	Total capacity of the pool or member/node in usable terms. Pools that are defined with a specific RAID level have this metric. Pools that can support LUNs with different RAID levels do not have this metric.				conf_capacity
Used Capacity	= Total Usable Capacity - Available Usable Capacity.				conf_used
% Used	= Used Capacity / Total Usable Capacity Percentage of the member/node's usable capacity that has been used.				Calculated
% of Pool	EqualLogic Pools-Members tab only. Percentage of the pool storage capacity provided by a pool member.				Calculated

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