Fractional reserve in Volumes without LUNs

[KKU]

Hello,

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?

Thanks,

Korinna

[sgrant]

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.

Thanks,

Grant.

[KKU]

Hi Grant,

yes, that is very helpfull.

I thougth so, but I wasn't sure.

Kind reagrds,

Korinna