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Storage Configuration Best Practices for SAP HANA TDI with Dell Unity Storage
Executive summary Introduction Technology overview and considerations Storage design recommendations for Dell EMC Unity arrays for SAP HANA Configuring Unity storage for HANA using Dell EMC Unisphere for Unity Accessing Unity storage from the SAP HANA nodes
Overview
Enabling native Linux multipathing (DM-MPIO)
XFS file system
SAP HANA storage connector
SAP HANA global.ini file
Optimizing file I/Os after SAP HANA installation
Conclusion References

Enabling native Linux multipathing (DM-MPIO)

Home > Workload Solutions > SAP > Guides > SAP HANA TDI Guides > Storage Configuration Best Practices for SAP HANA TDI with Dell Unity Storage > Enabling native Linux multipathing (DM-MPIO)

Enabling native Linux multipathing (DM-MPIO)

  • To access the block devices from the SAP HANA nodes, first enable native Linux multipathing. Follow the steps described in the Dell EMC Host Connectivity Guide for Linux to enable DM-MPIO on your operating system version. Figure 27 shows an example of a multipath.conf file.

     

    Figure 27.     Sample multipath.conf file

    The SAP HANA persistent devices are visible on an SAP HANA worker host after a restart or a rescan (using the rescan-scsi-bus.sh command). To verify that all devices are present and that each device has the number of active paths you configured (as shown in Figure 28, type the following command:

    Multipath –ll

    Figure 28.     Sample Multipath -ll

    Dell EMC uses the LUN UUID to identify the correct storage devices. To view the identifier of a Unity LUN, go to the Volume tab in the configuration workspace in the Dell EMC Unisphere for Unity.

    Note: Linux adds a preceding ‘3’ to the storage UUID.