#Maximum Percentage Used for Aggregates

1 messages · Page 1 of 1 (latest)

olive wing
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I am in the process of migration from our A700 to a fresh A90 and wanted to know, how full I can fill my aggregates before I start getting performance impacts.
I found the following Forum post, which states around 95%: https://community.netapp.com/t5/ONTAP-Discussions/Recommended-aggregate-free-space-for-AFF-models/m-p/438207
Is this information:

  1. correct?
  2. still up to date?

Thanks 🙂

Recommended aggregate free space for AFF models

Hi I would like to know the guidelines for the aggregates capacity usage levels for AFF A250 model. As I've heard for FAS models it was recommended to keep around 20% of free space in the aggregate. Otherwise ait resulted in a performance degradation. What about AFF disk arrays, can we fill it up to...

late idol
#

I would not fill up any system to more than 80% regularly, for the simple reason that those remaining 5% can fill up pretty quickly depending on the workload (think dozens of servers installing big patches, filling up snapshot space), and by Murphy's Law it happens when you're out-of-office for a week and nobody is actively monitoring it.
When the aggregate is completely full, you're in real trouble.
So yeah, while there might not be a strict technical reason not to go to 95% or even more on an AFF, I still wouldn't do it.