Tracking Capacity Optimization (Inline Deduplication and Compression)

It is important to monitor the remaining Capacity Optimization space that is available per server. The Disk Pools tab shows the remaining Capacity Optimization space and whether it is at a healthy, warning, or critical level.

  • Healthy (green)

  • Warning (yellow)

  • Critical (red)

  • The values that determine the warning and critical states are system-defined and cannot be modified.
  • A Capacity Optimization enabled Disk Pool may take up to 30 seconds to refresh allocation values in the Disk Pool Usage Pie Chart when viewed in the DataCore Management Console. This is a display-only issue. All performance counters and alert monitors that are related to these statistics will have real-time information when queried.

If the free space on a capacity-optimized server reaches a critical level, DataCore SANsymphony will redirect any disk writes from the capacity-optimized disks to the standard disks. Once additional free space is added to the capacity-optimized storage, DataCore SANsymphony will automatically allow writes to the capacity-optimized storage again. Data that was redirected to the standard disks will be automatically migrated back to capacity-optimized storage. If the system exhausts the available storage, the dependent disk pools will go offline, and all dependent virtual disks will fail on the corresponding server.

Tracking Capacity Optimization for a Server

After a server is set up, and virtual disks are using Capacity Optimization, DataCore Web Console displays relevant statistics on Server Details page, on the Info tab. In the lower half of the page, there are several performance measures and a list of pools with Capacity Optimization enabled.

The following performance indicators are available:

  • How much of the available capacity-optimized storage on the server is being used
  • Compression ratio
  • Deduplication ratio
  • How many virtual disks from the server are configured to use Capacity Optimization
  • How much storage would have actually been used if Capacity Optimization was not enabled
  • How much of the available Mirrored Special Device storage on the server is being used
  • How much of the available L2ARC storage on the server is being used

Tracking Capacity Optimization for a Pool

You can track Capacity Optimization for pools from the Server Details page on the Disk Pools tab:

  • How much of the available capacity-optimized storage on the server is being used, and if it's at a healthy, warning, or critical level
  • How much of the standard storage in the pool is being used
  • How much storage would have actually been used if Capacity Optimization was not enabled

Tracking Capacity Optimization for a Virtual Disk Details page

From the Server Details page on the Virtual Disks tab, you can see whether Capacity Optimization settings are enabled for a virtual disk (Inline Deduplication and Compression).

Tracking Disks in Capacity Optimization

You can track disks in Capacity Optimization from the Server Details page under the Capacity Optimization Disks tab.

The following information of the physical disks added to the Capacity Optimization is displayed:

  • Name
  • Index
  • Disk Size
  • Disk Sector Size
  • Usage (the device in Capacity Optimization for which physical disk is being used)
  • Port/Bus/Target/LUN used
  • Status