HANA on ANF - adjust parameters per SAP note 3024346

Author: rdeltcheva

articles/virtual-machines/workloads/sap/sap-hana-scale-out-standby-netapp-files-rhel.md

@@ -9,7 +9,7 @@ ms.service: virtual-machines-sap
 ms.topic: article
 ms.tgt_pltfrm: vm-windows
 ms.workload: infrastructure-services
-ms.date: 02/11/2022
+ms.date: 05/09/2022
 ms.author: radeltch
 ---
 
@@ -21,7 +21,7 @@ ms.author: radeltch
 
 [anf-azure-doc]:/azure/azure-netapp-files/
 [anf-avail-matrix]:https://azure.microsoft.com/global-infrastructure/services/?products=netapp&regions=all 
-[anf-sap-applications-azure]:https://www.netapp.com/us/media/tr-4746.pdf
+
 
 [2205917]:https://launchpad.support.sap.com/#/notes/2205917
 [1944799]:https://launchpad.support.sap.com/#/notes/1944799
@@ -80,7 +80,6 @@ Before you begin, refer to the following SAP notes and papers:
   * [Red Hat Enterprise Linux Networking Guide](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide)
 * Azure-specific RHEL documentation:
   * [Install SAP HANA on Red Hat Enterprise Linux for Use in Microsoft Azure](https://access.redhat.com/public-cloud/microsoft-azure)
-* [NetApp SAP Applications on Microsoft Azure using Azure NetApp Files][anf-sap-applications-azure]
 * [NFS v4.1 volumes on Azure NetApp Files for SAP HANA](./hana-vm-operations-netapp.md)
 
 ## Overview
@@ -327,18 +326,15 @@ Configure and prepare your OS by doing the following steps:
     yum install nfs-utils
     </code></pre>
 
-3. **[A]** Prepare the OS for running SAP HANA on Azure NetApp with NFS, as described in [NetApp SAP Applications on Microsoft Azure using Azure NetApp Files][anf-sap-applications-azure]. Create configuration file */etc/sysctl.d/netapp-hana.conf* for the NetApp configuration settings.  
+3. **[A]** Prepare the OS for running SAP HANA on Azure NetApp with NFS, as described in [3024346 - Linux Kernel Settings for NetApp NFS](https://launchpad.support.sap.com/#/notes/3024346). Create configuration file */etc/sysctl.d/netapp-hana.conf* for the NetApp configuration settings.  
 
     <pre><code>
     vi /etc/sysctl.d/netapp-hana.conf
     # Add the following entries in the configuration file
     net.core.rmem_max = 16777216
     net.core.wmem_max = 16777216
-    net.core.rmem_default = 16777216
-    net.core.wmem_default = 16777216
-    net.core.optmem_max = 16777216
-    net.ipv4.tcp_rmem = 65536 16777216 16777216
-    net.ipv4.tcp_wmem = 65536 16777216 16777216
+    net.ipv4.tcp_rmem = 4096 131072 16777216
+    net.ipv4.tcp_wmem = 4096 16384 16777216
     net.core.netdev_max_backlog = 300000 
     net.ipv4.tcp_slow_start_after_idle=0 
     net.ipv4.tcp_no_metrics_save = 1
@@ -363,7 +359,7 @@ Configure and prepare your OS by doing the following steps:
 > [!TIP]
 > Avoid setting net.ipv4.ip_local_port_range and net.ipv4.ip_local_reserved_ports explicitly in the sysctl configuration files to allow SAP Host Agent to manage the port ranges. For more details see SAP note [2382421](https://launchpad.support.sap.com/#/notes/2382421).  
 
-5. **[A]** Adjust the sunrpc settings, as recommended in the [NetApp SAP Applications on Microsoft Azure using Azure NetApp Files][anf-sap-applications-azure].  
+5. **[A]** Adjust the sunrpc settings, as recommended in the [3024346 - Linux Kernel Settings for NetApp NFS](https://launchpad.support.sap.com/#/notes/3024346).  
 
     <pre><code>
     vi /etc/modprobe.d/sunrpc.conf
@@ -704,7 +700,7 @@ In this example for deploying SAP HANA in scale-out configuration with standby n
    - `async_write_submit_active` **on**
    - `async_write_submit_blocks` **all**
 
-   For more information, see [NetApp SAP Applications on Microsoft Azure using Azure NetApp Files][anf-sap-applications-azure]. 
+   For more information, see [I/O stack configuration for SAP HANA](https://docs.netapp.com/us-en/netapp-solutions-sap/bp/saphana_aff_nfs_i_o_stack_configuration_for_sap_hana.html). 
 
    Starting with SAP HANA 2.0 systems, you can set the parameters in `global.ini`. For more information, see SAP Note [1999930](https://launchpad.support.sap.com/#/notes/1999930).