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Foglight for Storage Management Shared 4.6 - User and Reference Guide

Getting Started 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

Investigating an FC Switch Port

The data displayed in the dashboard reflects values for the component over the selected time range. This walkthrough describes the contents of each of the tabs.

 
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NOTE: If the port is a Brocade logical ISL, no metrics are available.
To explore a switch port:
1
On a dashboard, click an FC switch port.
The FC Switch Port dashboard opens.
2
Review overall performance in the Summary tab.
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Details. Displays the port’s status, physical details, parent switch, parent fabric, VSAN (if applicable), and current values for Data Rate, Frame Rate, Link Error Rate, and Non-Link Error Rate. Click a Sparkline to plot metric values over the time period.
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Charts. Charts plot the following metric pairs over the time period:
- Data Rate. Plots values for Data Receive Rate and Data Send Rate.
- Utilization. Plots values for Rcvd Utilization and Xmit Utilization.
- Frame Rate. Plots values for Frame Receive Rate and Frame Send Rate.
- Errors. Plots values for Link Error Rate and Non-Link Error Rate.
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Alarm Summary. Displays alarms on the port.
3
Click the Topology tab.
The contents of this tab depends on the type of port selected.
ISL Port:
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Switch-to-Switch Connectivity diagram. Displays the selected ISL port (left box) and its connection to another ISL port (right box). Click a port icon for details about the device connected to the port.
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Topology Table (Inter-Switch Connections). Identifies all ISL port connections from this port’s parent switch to other switches in the fabric.
N Port:
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Basic Connectivity (table). Displays the ESX hosts and/or physical hosts connected to the selected N port through their host ports. An N port can have connections to multiple host ports using NPV technology.
 
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TIP: If hosts in the Host Name column are (unknown), you may be able to use dependency processing to infer the host names associated with the host ports. For instructions, see Inferring Physical-Host-to-Storage Relationships.
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Basic Connectivity (diagram). Displays the selected N port (left box) and its connection to a filer or storage array port (right box). Click a port icon for details about the device connected to the port.
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Select Host Port(s). Controls the set of hosts displayed in the Port Dependencies table.
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Port Dependencies. On separate tabs, displays connections to LUNs (though the selected port) from virtual machines, ESX or Hyper-V servers, and physical hosts. If the selected port has problems or failures, the connected VMs or hosts may exhibit performance problems.
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To investigate further:
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Click a VSAN link and then select the name of the VSAN. Exploring a Cisco VSAN.
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Click an alarm. See Assessing Storage Alarms.
Related Topics
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Introducing Storage Component Dashboards
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Exploring a Fabric
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Exploring a Switch
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Exploring a Cisco VSAN

Investigating an Isilon Node

The data displayed in the dashboard reflects values for the selected Isilon node over the time range. This walkthrough describes the contents of each of the tabs.

To explore an Isilon node:
1
In a topology diagram or from the Isilon Storage Array dashboard, click a member node name.
The Member Node dashboard opens.
2
Review overall performance in the Summary tab.
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Related Inventory. Displays a list of components from the perspective of the member node (rather than the storage array).
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IFS Capacity. The chart displays IFS Capacity: Free and IFS Capacity Used for the IFS file system. In addition, the total capacity is broken down into hard disk drive and solid state drives metrics as follows:
- Total. IFS Capacity: Total and IFS Capacity: Free
- HDD. IFS Capacity: HDD Total and IFS Capacity: HDD Free
- SSD. IFS Capacity: SDD Total and IFS Capacity: SDD Free
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Node Network Load. Charts plot the following metric pairs:
- External Network Throughput. Plots the Send Data Rate and Rcv Data Rate for the external network over the time period.
 
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TIP: If you prefer to see the Send Util (% of max) and Rcv Util (% of max) based on the rated maximum speeds of the ports (actual port speeds are not available from Isilon arrays) in the external network, ask your Foglight for Storage Management Administrator to edit the registry variable StSAN_StoragePortShowUtilMax and set ISLN_E_IP=true.
- Internal Network Throughput. Plots values for Send Data Rate and Rcv Data Rate.
- Clients. Clients connected versus clients that are actively using the network.
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Node Performance. Charts plot the following metrics for the selected node over the time period: % Busy, Latency, L1 Cache Hit Rate, L2 Cache Hit Rate, Data Read Rate, Data Write Rate, Read Ops Rate, and Write Ops Rate.
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Summary and Resource Information. Displays physical details about the member node.
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Alarm Summary. Displays alarms on the member node.
3
Click the Network tab.
Displays the same information as the Network tab on the Isilon Storage Array dashboard, but the data reflects only the selected member node. For more information, see EMC VPLEX Storage Array.
4
Click the Disks tab.
Displays disks used by the selected member. For more information, see Common Component Disk Tab Data.
Related Topics
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Introducing Storage Component Dashboards
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EMC VPLEX Storage Array

Investigating a LUN

A LUN (logical unit number) represents a logical SAN block storage device on an array or filer that can be exposed for mapping to a server. The data displayed in the dashboard reflects metric values for the LUN over the selected time range. This walkthrough describes the contents of each of the tabs.

To explore a LUN:
1
On a dashboard, click a LUN name or icon.
The LUN dashboard opens.
2
Review overall performance in the Summary tab.
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Details. Displays the LUN’s status, physical details, parent device and capacity metrics.
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Charts. Plot values over the time period for these metrics, if available: Ops Rate, Data Rate, Latency, % Busy, Cache Hit Rate, and Average Queue Depth.
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Pool Details. Identifies the pools to which the LUN belongs.
Non-clustered storage arrays — Displays performance and capacity metrics for the pools relevant to the selected LUN. For more information, see Performance Metrics and Capacity Metrics.
EqualLogic storage arrays—Displays the same information as the Pool Details view on the Pools-Members tab of the EqualLogic Storage Array dashboard, but the data reflects only the pools relevant to the selected LUN. For more information, see Dell EqualLogic Storage Array.
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Alarm Summary. Displays alarms on the LUN.
3
Click the Topology tab.
Displays the datastores, CSVs, or logical disks that get their physical storage from the selected LUN, the VMs that do the I/O, and if dependency processing is enabled, the (most likely) physical host connected to the LUN. For more information on dependency processing, see Inferring Physical-Host-to-Storage Relationships.

LUN providing storage to Hyper-V VMs

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Click a Cloud icon to reveal the ports and paths from disks extents to the LUN, through a particular server. For more information, see Exploring Connectivity with SAN Topology Diagrams.
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Click an icon, then select a component name to navigate to the component dashboard. For example, if you select the VM icon, you can see a list of the VMs that use the storage and select one that warrants further investigation.
4
Click the SAN Data Paths tab.
Displays the datastores or servers, CSVs or logical disks that get their physical storage from the selected LUN, and the VMs that do I/O to them and the LUN.
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Review the I/O Paths table to assess the worst performing path segment of the possible data paths between each disk extent and the LUN during the time period. This helps you to identify bottlenecks resulting in high latency. For general information about how to use a Data Paths tab, see Exploring I/O Performance with SAN Data Paths. For information specific to the LUN Data Path tab, see below.
 
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TIP: For metrics that have thresholds, the color of the bars highlight data values that fall within normal, warning, critical, and fatal thresholds.Thresholds are set in the registry variables StSAN.FCSwitchPortUtilization.[Warning|Critical|Fatal].
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NOTE: The column headings may vary between VMware and Hyper-V. Where the names differ, the column headers will be listed for VMware and Hyper-V respectively.
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ESX/VMs or Hyper-V Server/VM. List of servers and the VMs they host.
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Latency. Average latency per operation in the time period.
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Data Rate. Average data rate for I/O from the ESX or VM to the LUN over the time period.
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% Total I/O in ESX or % Total I/O in Hyper-V Server. When multiple VMs on a server are performing I/O to the same LUN, displays the percentage of the total I/O performed by this VM.
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ESX FC Ports --> SAN Util or Hyper-V Server FC --> Ports SAN Util. Displays the busiest link (read or write utilization) over a time period. Click the cell to display all the port links. Review the topology diagram to see the ports and link utilization. Data is not available for IP ports.
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SAN --> A/F Ports Util. Displays the busiest link (read or write utilization) over the time period. Click the cell to display all the port links. Review the topology diagram to see the ports and link utilization. Data is not available for IP ports.
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% Total I/O at LUN. When VMs on multiple servers are doing I/O to the same LUN, displays the percentage of the total I/O performed by this server.
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LUN Latency (ms). Displays the latency of LUN in ms.
6
Review the diagram to understand the path from disk extents through the SAN to LUNs. The topology diagram is enhanced to show the FC ports and to display latency, link utilization, and for controllers, percent busy.
 
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NOTE: When physical hosts are inferred by dependency processing and not monitored directly by agents, the disk extents on the host that map to the selected LUN are unknown and therefore no latency values are available. For instructions on how to enable dependency processing, see Inferring Physical-Host-to-Storage Relationships.
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To investigate further:
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Click a host, VM, or virtual storage name or icon. See the Managing Virtualized Environments User and Reference Guide.
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Click a disk name or icon. See Investigating a Physical Disk.
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Click a port name or icon. See Investigating an Array/Filer Port.
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Click a controller name or icon. See Investigating a Controller.
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Click an alarm. See Assessing Storage Alarms.
Related Topics
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Introducing Storage Component Dashboards
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Exploring a Filer
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Exploring a Storage Array

Investigating a NASVolume

A NASVolume is a volume whose physical storage is on a filer or unified storage supplier. It can be mounted by an ESX host to provide the physical storage for a datastore using NFS. The data displayed in the dashboard reflects metric values for the NASVolume over the selected time range. This walkthrough describes the contents of each of the tabs.

To explore a NASVolume:
1
On a dashboard, click a NASVolume name.
The NASVolume dashboard opens.
2
Review overall performance in the Summary tab.
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Details. Displays the volume’s status, physical state, physical details, parent devices, and alarms on disks in the volume. Also displays current values for Advertised NASVolumes Size, Used Capacity, and % Used.
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Charts. Displays the following metrics over the time period:
- Data Rate. Plots values for Data Read Rate and Data Write Rate.
- Ops Rate. Plots values for Read Ops Rate, Write Ops Rate and Other Ops.
- Latency. Plots values for Read Latency and Write Latency.
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Aggregate Details. Displays values for Total Usable Capacity, Available Usable Capacity % Available, Advertised NASVolumes Size, and Overcommitment.
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Alarm Summary. Displays alarms on the NASVolume.
3
Click the Topology tab.
Displays the datastores that get their physical storage from the selected volume as a NAS mount and the VMs that do I/O to these datastores. For more details, click an icon or an entity name. For more information about using this view, see Exploring Connectivity with SAN Topology Diagrams.
4
Click the Disks tab.
Displays the disks used by the NASVolume. For more information, see Common Component Disk Tab Data.
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To investigate further:
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Click a host, VM, or datastore name or icon. See the Managing Virtualized Environments User and Reference Guide.
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Click an alarm. See Assessing Storage Alarms.
Related Topics
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Introducing Storage Component Dashboards
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Exploring a Filer
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Investigating an Aggregate
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