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application-volume-group-add-hosts.md

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title description services documentationcenter author manager editor ms.assetid ms.service ms.workload ms.tgt_pltfrm ms.topic ms.date ms.author
Add hosts to a multiple-host SAP HANA system using Azure NetApp Files application volume group for SAP HANA | Microsoft Docs
Describes how to add additional HANA hosts after you have created the first host in an SAP HANA multiple-host setup.
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Add hosts to a multiple-host SAP HANA system using application volume group for SAP HANA

Building a multiple-host SAP HANA database always starts with creating a volume group for the first host. You need to have created the first host in an SAP HANA multiple-host setup (see Deploy the first SAP HANA host). After that, you can add additional HANA hosts by following steps in this article.

Important

SAP recommends that you size the HANA shared volume to 1 x RAM of a HANA host for every four SAP HANA hosts of a multiple-host SAP HANA database. You might need to adjust the size for the shared volume you created with the initial host to adapt for the required capacity.

Steps

  1. From your NetApp account, select Application volume groups, and click +Add Group. Then in Deployment Type, select SAP HANA and click Next.

  2. In the SAP HANA tab for adding a volume group, specify the following information:

    • SAP ID (SID):
      The three alphanumeric-character SAP HANA system identifier.
    • Group name:
      The volume group name. For a multiple-host SAP HANA, each host will create its own group.
      In the example screenshot below, the group name SAP-HANA-SH9-{HostId} is a generic name. {HostId} will be replaced with the corresponding numeric host ID for each host you add. {HostId} will also be replaced with the numeric host ID for the volume group description. If {HostId} is not specified, it is appended to the end for both the group name and description.
    • SAP node memory:
      This value defines the size of the SAP HANA database on the host. It is used to calculate the required volume size and throughput.
    • Capacity overhead (%):
      When you use snapshots for data protection, you need to plan for extra capacity. This field will add an additional size (%) for the data volume.
      You can estimate this value by using "change rate per day" X "number of days retention".
    • Multiple-host:
      Select this option to add additional hosts to a multiple-host HANA.
    • First host ID:
      Specify the number of the first host you want to add. This value is typically "2" if you are adding hosts for the first time.
    • Host count:
      Specify the number of hosts you want to add to the multiple-host setup.

    Click Next: Volume Group.

    Screenshot that shows the HANA section for adding hosts.

  3. In the Volume group tab, provide identical input as you did when you created the first HANA host.

    Then click Next and continue through the Protocol and Tags sections, providing the same input as the first HANA host. (See Step 4 through Step 6 in Deploy the first SAP HANA host.)

    Click Next: Volumes when you reach the end of the sections.

    For additional hosts that you add, only the data and the log volumes will be created. The Volumes page displays the two volumes in a generic form, using the {HostId} as a placeholder. This process simplifies the workflow, because changes are made only once for the data and log volumes for all the hosts that are being created.

    [!NOTE] SAP HANA allows you to add different compute volume types to a multiple-host setup. If you use this setup, you should add only one host for the same compute type at one time.

    Click Next: Review + Create.

    Screenshot that shows the Volumes section for adding hosts.

  4. In the Review + Create tab, the {HostId} placeholder is replaced with the individual numbers for each of the volume groups that will be created.

    You can click Next Group to navigate through all volume groups that are being created (one for each host). You can also click a particular volume to view its details.

    Screenshot that shows the Review and Create section for adding hosts.

  5. After you navigate through the volume groups, click Create All Groups to create all the volumes for the HANA hosts you are adding.

    Screenshot that shows the Create All Groups button.

    The Create Volume Group page shows the added volume groups with the "Creating" status.

Next steps