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Foglight for Storage Management Shared 4.6.5 - 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 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.

To explore a physical disk:
1
On a dashboard, click a disk name.
2
Review overall performance in the Summary tab.
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Disk Details. Displays the disk’s status, physical details, parent device, and size if available.
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Physical State: Displays the physical state the of disk. It will be marked as "No Information" if the disk does not commit any performance data. To mark disks as "Removed", click on "No Information" link and confirm the disk is removed physically by pressing "Removed" button.
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NOTE: Selecting "No Information Disks" metric from Show Disks With drop down shows the disks with no metrics provided by the Agent. Selecting "Removed Disks" metric from Show Disks With drop down shows the disks manually marked as "Removed" Physical State in No Information Dialog.
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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.
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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 VPLEX Storage Array.
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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.
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Alarm Summary. Displays alarms on the disk.
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 Pool

Displays a summary of details for the selected pool, including a selection of size, capacity, data rate, and latency metrics. The data displayed in the dashboard reflects values for the pool over the selected time range.

The Pool dashboard is very similar for non-clustered storage arrays and EqualLogic storage arrays. The Isilon storage array requires its own Pool dashboard, which is discussed separately. The following walkthroughs describe the contents of each of the tabs.

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

To explore a pool:
1
On a dashboard, click a pool name.
The Pool dashboard opens.
2
Review overall performance in the Summary tab. From here you can initiate further analysis of the pool in terms of performance and, in some cases, pool capacity.
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Details. Displays the pool’s status, parent storage array, physical state, health score, and current values for Total Advertised LUNs Size, Total Usable Capacity, Available Usable Capacity, Overcommitment, Total Raw Capacity, and Available Raw Capacity, if available.
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Charts. Displays the following sets of metrics over the time period, if available:
- Data Rate. Plots values for Data Rate, Data Read Rate, and Data Write Rate.
- Ops Rate to Disk. Plots values for Ops Rate, Read Ops Rate, and Write Ops Rate.
- Latency. Plots values for Latency, Read Latency, and Write Latency.
- Average Queue Depth. Plots values for Average Queue Depth.
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Perform Pool Change Analysis. Click to identify the LUNs primarily responsible for increased I/O. For more information, see Analyzing the Pool.
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Perform Pool Load Analysis. Click to identify the busiest LUNs, and rank them based on their activity during the same time range over the last 30 days. For more information, see Analyzing the Pool.
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Alarm Summary. Displays alarms on the pool.
3
Click the Capacity tab.
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Capacity Summary. Pools in most arrays will display data similar to the data shown below.
For some arrays, pool capacity in Usable terms is not available. Then the capacity summary will display with total capacity in raw terms instead of usable terms.
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Capacity Usage Trends. Provides a visual display of the estimated capacity consumption in the future, based on a regression analysis of the historical capacity consumption.
If time until full shows n/a, it means enough historical data hasn't been collected yet to perform an analysis. Mouse over for additional information. For more information, see Capacity Trending.
4
Click the LUNs tab. This tab displays the LUNs carved from this pool.
A LUN (logical unit) is the block storage element made available by an array or filer to a server.
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Top 5 LUNs. Displays the top five LUNs with the highest average value for Data Rate, and the performance metrics most useful for this array or filer.
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LUN Status Filter. Click to show only LUNs with the selected status in the LUN Details table.
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LUN Details. For each LUN, displays its status, physical state, parent pool or aggregate, and whether the LUN is used by an entity in the monitored environment. The metric columns display current values for Data Rate, Ops Rate, Latency, % Busy, Average Queue Depth, L1 Cache Hit Rate, and Total Advertised LUNs Size. Click a Sparkline to plot metric values over the time period.
 
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NOTE: If a metric is not available for this particular array or filer, the column is not displayed.
The remaining columns provide the following details:
- Protection. Displays the type of protection in use on the LUN, such as the RAID level.
- Thin?. Indicates whether the LUN is thin-provisioned (true) or thick-provisioned.
- IQN. Displays the iSCSI Qualified Name. Click the Customizer to add this column.
- vFiler. Filers only. Displays the name of the virtual filer associated with the LUN.
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Alarm Summary. Displays alarms on LUNs.
5
Click the Disks tab.
Displays the disks used by the selected pool. For more information, see Common Component Disk Tab Data.
6
To investigate further:
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Click a LUN name. See Investigating a LUN.
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Click a disk name. See Investigating a Physical Disk.

Pool belonging to an Isilon storage array

To explore a pool for an Isilon storage array:
1
On an Isilon-related dashboard, click a pool name.
The Pool dashboard opens.
2
Review overall performance in the Summary tab.
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Pool Details. Displays the pool’s status, parent storage array, and current values for 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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Performance. Charts plot the following metrics for the selected pool 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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Node Status Filter. Click to show only member nodes with the selected status in the Node Details table.
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Node Details. For each node belonging to the pool, displays its name, status, physical state, and current values for Data Rate, % Busy, Latency, L2 Cache Hit Rate, IFS Capacity, and IFS Capacity: Free. Also displays the worst status of the node’s disks, external network ports, and internal network ports, and identifies the node’s parent pool. Click a Sparkline to plot metric values over the time period.
You can add the following metrics to the table by clicking the Customizer icon:
L1 Cache Hit Rate, Send Data Rate and Rcv Data Rate. You can also choose to display other Isilon details, such as Total Disk IOPS and Model.
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Alarm Summary. Displays alarms on the pool.
3
Click the Capacity tab.
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Capacity Usage Trends. Provides a visual display of the estimated capacity consumption in the future, based on a regression analysis of the historical capacity consumption.
If time until full shows n/a, it means enough historical data hasn't been collected yet to perform an analysis. Mouse over for additional information. For additional information, see Capacity Trending.
4
Click the Network tab. Assess the performance of the ports in the External Network from the perspective of the pool.
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Charts. Plot aggregated values for Send Data Rate and Rcv Data Rate, and Packet Errors % for the external network connections over the time period.
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Port Status Filter. Click to show only ports with a selected status in the Port Details table.
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Port Details. For each port used by the external network, identifies the port name, parent node, status, physical state, and current values for Send Data Rate, Rcv Data Rate, and Packet Errors %. Also displays the maximum speed of the port. Click a Sparkline to plot metric values over the time period.
 
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NOTE: When the registry variable StSAN_StoragePortShowUtilMax is set to show port utilization, the chart and table display Rcv Util (% of max) and Send Util (% of max).
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Alarm Summary. Displays alarms on ports used by the external network.
5
Click the Disks tab. Displays the disks used by the selected pool. For more information, see Common Component Disk Tab Data.
6
To investigate further, click a disk name. See Investigating a Physical Disk.
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