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Thursday, February 11, 2016

What is host automatic LUN space reclaiming in Netapp Ontap 8.2

Data ONTAP 8.2 introduced a space reclamation feature that allows Data ONTAP to reclaim space from a thin provisioned LUN when the client deletes data from it, and also allows Data ONTAP to notify the client when the LUN cannot accept writes due to lack of space on the volume.

Supported Operating System starting from the versions below following all the later releases

VMware ESX 5.0 

Red Hat Enterprise Linux 6.2

Microsoft Windows 2012


Note:- You can only enable space reclamation through the Data ONTAP command line,


nayabclus1::> lun show -vserver svmsan -path /vol/lnxvol/lnxlun -fields
space-allocation

vserver path space-allocation
------- ---------------------- ----------------
svmsan /vol/lnxvol/lnxlun disabled


Now Enable space reclamation for the LUN lnxlun

nayabclus1::> lun modify -vserver svmsan -path /vol/lnxvol/lnxlun -space-allocation
enabled

Check the LUN's space reclamation setting now

nayabclus::> lun show -vserver svmsan -path /vol/lnxvol/lnxlun -fields space-allocation

vserver path space-allocation
------- ---------------------- ----------------

svmsan /vol/lnxvol/lnxlun  enabled


The space reclamation has been enabled

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