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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

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.

Also Advertised LUNs Size

Sum of the Advertised LUN Size for all LUNs in the entity.

 

conf_LunSize

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

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

Also Provisioned to LUNs

Capacity used for LUN data. Does not include capacity that is used for snapshots, reserves, etc.

Formerly displayed as Consumed Capacity.

 

Array:

lun_usable_capacity

Pool:

conf_used

= 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

Sum of the sizes of the disks in the array. This includes spares.

 

 

disk_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 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

= Total Usable Capacity - Available Usable Capacity.

 

 

conf_used

= Used Capacity / Total Usable Capacity

Percentage of the member/node's usable capacity that has been used.

 

 

Calculated

EqualLogic Pools-Members tab only.

Percentage of the pool storage capacity provided by a pool member.

 

 

Calculated

EMC Isilon Only Capacity Metrics

Isilon arrays provide additional metrics to describe the Isilon OneFS file system (IFS) capacity in terms of hard disk drive (HDD) and solid state drive (SSD) capacity.

 

Raw capacity of the hard drives in the array, as reported by the vendor.

 

 

raw_capacity_HDD

Raw capacity of the solid-state drives in the array, as reported by the vendor.

 

 

raw_capacity_SSD

Total capacity of the Isilon File System.

 

Array:

pool_capacity_conf

Pool: conf_capacity

= Total HDD Capacity + Total SSD Capacity

Capacity of the Isilon File System on a pool or member/node.

 

conf_capacity

Also IFS Free

Free capacity of Isilon File system.

Array:

pool_free_conf

Pool and member:

conf_available

= IFS Capacity - IFS Capacity: Free

Calculated

Capacity of Isilon File System on hard disk drives in an array, pool, or node.

conf_capacity_HDD

Free capacity of Isilon File System on hard disk drives in an array, pool, or node.

conf_available_HDD

= IFS Capacity: HDD Total - IFS Capacity: HDD Free

Calculated

Capacity of Isilon File System on solid state drives in an array, pool, or node.

conf_capacity_SSD

Free capacity of Isilon File System on solid state drives in an array, pool, or node.

conf_available_SSD

= IFS Capacity: SDD Total - IFS Capacity: SDD Free

Calculated

= IFS Capacity: HDD Free / IFS Capacity: HDD Total

 

conf_pct_available_HDD

= IFS Capacity: SDD Free / IFS Capacity: SDD Total

 

conf_pct_available_SSD

Filers — Filer and Aggregate Capacity Metrics

Foglight for Storage Management supports NetApp filers (F). NetApp uses the word aggregate (Ag) instead of pool, but the metrics collected for aggregates are similar to the metrics collected for pools.

Also Total Advertised LUNs Size or Adv LUNs Size

Sum of the Advertised LUN Size for all LUNs in the entity.

 

configured_lun_size

Sum of the Advertised Size for all NASVolumes.

Filer:

configured_vol_size

Aggregate:

conf_VolSize

Also Total Disk Capacity

Sum of the sizes of the disks in the filer. This includes spares.

 

disk_capacity

Amount of disk capacity that has not been committed to an aggregate.

Disk capacity cylinder coloring and capacity alarms are defined in registry variables with the prefix: StSAN.FilerDisks.PctUnallocatedCapacityThres hold...

 

disk_free

Also Total Usable Aggr Capacity

Sum of the Total Usable Capacity of all the aggregates in the filer. Aggregate capacity cylinder coloring and alarms are defined in registry variables with the prefix:

StSAN.FilerAggregates.PctUnallocatedCapacityThreshold...

 

pool_capacity_conf

Also Available Aggr Capacity

Sum of the Available Usable Capacity in the aggregates. Usable means after applying RAID.

 

pool_free_conf

Also displayed as Aggregate Capacity (Raw)

Sum of the raw capacity of all the aggregates in the filer.

 

pool_capacity_raw

Sum of the available raw capacity in all the aggregates.

 

pool_free_raw

= Advertised NASVolumes Size – Aggr Capacity (Usable) Total

Overcommitment reflects the minimum additional capacity needed in the aggregate to support the advertised capacity promised to thin-provisioned volumes and 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.

 

conf_overcommitted

Total capacity of the aggregate in usable terms. Usable means after applying RAID.

 

conf_capacity

Also displayed as Available Capacity

Capacity available in the aggregate that has not been committed to data, snapshots, or thick-provisioned volumes and LUNs, in usable terms. Usable means after applying RAID.

 

conf_available

= Total Usable Capacity – Available Usable Capacity

 

conf_used

Also % Free

= Available Usable Capacity / Total Usable Capacity

 

Calculated

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

These metrics describe the capacity of LUNs, NASVolumes, and disks.

Size of the LUN as advertised to the hosts connected to the LUN.

 

 

advertisedSize

Capacity provisioned for LUN data. In a thin-provisioned LUN, this is the capacity used for data written to the LUN. In a thick-provisioned LUN, this is the capacity allocated to the LUN, and does not reflect data written.

 

 

size

Capacity provisioned for LUN data in raw terms.

 

 

rawCapacity

Size of the NASVolume as advertised to the host mounting the volume.

 

 

total_capacity

Advertised SizeUsed Capacity

 

 

available_capacity

Capacity in volume committed to data, snapshots, etc. in usable terms.

 

 

used_capacity

= Used Capacity / Advertised Size

 

 

percent_used

Size of the disk in MBs. Disk capacity cylinder coloring and capacity alarms are defined in registry variables with the prefix:

StSAN.FilerDisks.PctUnallocatedCapacityThreshold...

 

 

size

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