How reclamation on a deleted volume works
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How reclamation on a deleted volume works

Storage that is no longer in use, needs to be reclaimed by the array. The process of reclaiming storage on an array can be intense on the array. To avoid any effect on regular I/O's to the array, the reclaim operation is made asynchronous. When a volume is deleted the space previously used by the volume is tracked for later asynchronous reclamation. This asynchronous reclamation is handled by vxrelocd (or recovery) daemon.

By default, the vxrelocd daemon runs everyday at 22:10 hours and reclaims storage on the deleted volume that are one day old.

To perform the reclaim operation during less critical time of the system, control the time of the reclaim operation by using the following tunables:

reclaim_on_delete_wait_period

The storage space that is used by the deleted volume is reclaimed after reclaim_on_delete_wait_period days. The value of the tunable can be anything between -1 to 367.

The default is set to 1, which means the volume is deleted the next day. The storage is reclaimed immediately if the value is -1. The storage space is not reclaimed automatically, if the value is greater than 366. It can only be reclaimed manually using vxdisk reclaim command.

reclaim_on_delete_start_time

This tunable specifies the time of the day that the reclaim on the deleted volume is performed.

The default time is set to 22:10. This value can be changed to any time of the day.

You can change the tunables using the vxdefault command.

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