Fractional reserve in Volumes without LUNs
2017-07-04 12:37 AM
I'm a little bit confused.
I have some thin provisioned volumes without LUNs. They are published by NFS and CIFS.
We have provided the volumes with snapshot reserve 10% because we need snapshots.
We have no autodelete and no autosize enabled.
What is the difference in behaviour between fractional_reserve=0% and fractional_reserve=100% in these volumes?
Which value is recommended in these volumes?
2 REPLIES 2
Re: Fractional reserve in Volumes without LUNs
2017-07-04 12:57 AM
Hi Korinna, fractional reserve has no effect on any NAS volume, i.e. CIFS and NFS only. It only comes into effect for SAN volumes i.e. LUNs. So the setting can be either 0 or 100% it makes no difference, just leave it as default.
Please see https://kb.netapp.com/support/s/article/ka21A0000000gB5QAI/faq-how-is-space-utilization-managed-in-a-data-ontap-san-environment?language=en_US, which gives a little more detail.
Hope it helps.