D-Link DSN-656 User Manual - Page 101

Thin Provisioning Case, Space reclamation

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D-Link Document - User Manual Figure 6: Capacity policy settings  Automatic space reclamation to recycle unused space and increase utilization rate. Automatic space reclamation will be automatically activated in RAID group initialization process or it can be set manually through capacity policy. You can set as many as 16 policies. When space usage ratio grows over the threshold set in the policy, space reclamation will be enabled automatically in the background with the lowest priority or when the I/O is low. The resource impact is reduced to a minimum. Figure 7: Space reclamation Thin Provisioning Case We suggest that you apply Thin provisioning to non-critical production applications first. Thin provisioning works well when the data written is thin-friendly, which means that the data written is not completely spread across the whole volume. Applications that spread metadata across the Copyright@2014 D-Link System, Inc. All Rights Reserved. 101

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D-Link Document – User Manual
Figure 6: Capacity policy settings
Automatic space reclamation to recycle unused space and increase utilization rate.
Automatic space reclamation will be automatically activated in RAID group initialization process or
it can be set manually through capacity policy. You can set as many as 16 policies. When space
usage ratio grows over the threshold set in the policy, space reclamation will be enabled
automatically in the background with the lowest priority or when the I/O is low. The resource
impact is reduced to a minimum.
Figure 7: Space reclamation
Thin Provisioning Case
We suggest that you apply Thin provisioning to non-critical production applications first. Thin
provisioning works well when the data written is thin-friendly, which means that the data written
is not completely spread across the whole volume. Applications that spread metadata across the
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Copyright@2014 D-Link System, Inc. All Rights Reserved.