Skip to main content
NetApp Knowledge Base

How to calculate the overhead of storage pool based on the desired capacity when deploy a new ONTAP Select cluster or add capacity to an existed cluster

Views:
67
Visibility:
Public
Votes:
0
Category:
ontap-select
Specialty:
core
Last Updated:

Applies to

  • ONTAP 9
  • ONTAP Select
  • VMware Datastores

Description

  • When deploy a new ONTAP Select cluster, you must to specify a proper storage pool capacity limit so that you can safely deploy and use the cluster.
  • The way to calculate overhead of the storage pool is different when creating a new select cluster or add capacity to an existed cluster.
  • When calculating the required minimum storage pool capacity, the following considerations need to be taken into account:
    • Capacity desired for the ONTAP Select nodes to be used.
    • Overhead reserved for ONTAP Select system backend operations: 130 GB - 272 GB per node
    • A 2% buffer is reserved for the total storage pool.

Notes:

  • A 2% buffer is left unused in each storage pool, which is only used for available capacity check.
  • ONTAP Select virtual machines created on storage pools are attempted using thin-provisioning but are subject to underlying storage policies.
  • If honored, ONTAP Select will not immediately consume the full amount of the storage specified.
  • If ONTAP Select attempts to use storage that has been allocated to it and if enough storage is not available, a data-serving outage will occur.

 

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.