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Foglight for Storage Management Shared 4.5.5 - User and Reference Guide

Getting Started Monitoring Storage Performance Investigating Storage Devices Investigating Storage Components Troubleshooting Storage Performance Managing Data Collection, Rules, and Alarms Understanding Metrics Online-Only Topics

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.

Related Inventory. Displays a list of components from the perspective of the member node (rather than the storage array).
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:
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.
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.
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.
Summary and Resource Information. Displays physical details about the member node.
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 Isilon Storage Array.
4
Click the Disks tab.

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.

Details. Displays the LUN’s status, physical details, parent device and capacity metrics.
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.
Pool Details. Identifies the pools to which the LUN belongs.
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.
Alarm Summary. Displays alarms on the LUN.
3
Click the Topology tab.

LUN providing storage to Hyper-V VMs

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.
4
Click the SAN Data Paths tab.
ESX/VMs or Hyper-V Server/VM. List of servers and the VMs they host.
Latency. Average latency per operation in the time period.
Data Rate. Average data rate for I/O from the ESX or VM to the LUN over the time period.
% 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.
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.
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.
% 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.
LUN Latency (ms). Displays the latency of LUN in ms.
Click a host, VM, or virtual storage name or icon. See the Managing Virtualized Environments User and Reference Guide.

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.

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.
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.
Alarm Summary. Displays alarms on the NASVolume.
3
Click the Topology tab.
4
Click the Disks tab.
Click a host, VM, or datastore name or icon. See the Managing Virtualized Environments User and Reference Guide.

Investigating a Physical Disk

The data displayed in the dashboard reflects values for the selected disk over the selected time range. The Physical Disk dashboard has only one tab.

Disk Details. Displays the disk’s status, physical details, parent device, and size if available.
Charts. Displays the following metrics over the time period:
- Data Rate. Plots values for Data Rate, Data Read Rate, and Data Write Rate.
- Ops Rate. Plots values for Ops Rate, Read Ops Rate, and Write Ops Rate.
- Latency. Plots values for Latency, Read Latency, and Write Latency.
- Busy %. Plots values for % Busy.
- Queue Depth. Plots depth of the queue.
Pool Details (Arrays only). Displays performance and capacity metrics for the pools to which this disk contributes resources. For more information, see Performance Metrics and Capacity Metrics. To investigate a pool, click its name. For more information, see Investigating a Pool.
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 disk. For more information, see Dell EqualLogic Storage Array.
Isilon storage arrays—Displays the same information as the Pool Details view on the Pools tab of the Isilon Storage Array dashboard, but the data reflects only the pools relevant to the selected disk. For more information, see EMC Isilon Storage Array.
Aggregate Details (Filers only). Lists the aggregates to which this disk contributes resources. For each aggregate, displays its name, status, physical state, and current values for Total Usable Capacity, Available Usable Capacity % Available, Advertised NASVolumes Size, and Overcommitment. To investigate an aggregate, click its name. See Investigating an Aggregate.
Alarm Summary. Displays alarms on the disk.
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