Space Reclamation Progress Graph

The Space Reclamation Progress graph displays the progress of the space reclamation stages. Use this graph to view the progress that has been made in reclaiming space on the DXiappliance. Review the following to gain a better understanding about space reclamation stages and progress.

Figure 1: Space Reclamation Progress Graph

Stages of Space Reclamation

Space reclamation consists of the following stages.

Compaction is the process that reclaims disk space allocated to the appliance's blockpool. The Compact stage deletes data identified by tags with a reference count of zero.

In this first Compact stage, the appliance deletes data that was tagged with a reference count of zero during a previous space reclamation. This stage allows you to do the following:

  1. Cancel a reclamation process to recover data that you do not want deleted.
  2. Delete data still tagged with a reference count of zero in a new reclamation process, without restarting the previous process.

The Reconcile stage collects a list of tags set to expire, along with the associated reference counts.

The Delete stage decrements the reference count of tags that have expired.

In the second Compact stage, the appliance deletes any tags with a reference count of zero in the current space reclamation process.

Represents the current stage of space reclamation activity. For readability purposes, the stage number is multiplied by 10 on the graph.

Example

the gcStage x 10 line plots at 20 along the y-axis to identify stage 2 (2 x 10 = 20).

Indicates the percentage of space reclamation that is currently complete.

Indicates the space reclamation progress completed over time.

Note: The Progress and Total Progress variables may never reach 100% because sampling is performed at specific intervals. When reclamation completes, no additional data is returned and Advanced Reporting cannot collect the 100% data point.