Merge pull request #97690 from msftphleiten/main

updating /etc/sysctl.d/netapp-hana.conf

Author: Jak-MS

articles/virtual-machines/workloads/sap/hana-vm-operations-netapp.md

@@ -36,6 +36,7 @@ When considering Azure NetApp Files for the SAP Netweaver and SAP HANA, be aware
 - Azure NetApp Files offers [export policy](../../../azure-netapp-files/azure-netapp-files-configure-export-policy.md): you can control the allowed clients, the access type (Read&Write, Read Only, etc.). 
 - Azure NetApp Files feature isn't zone aware yet. Currently Azure NetApp Files feature isn't deployed in all Availability zones in an Azure region. Be aware of the potential latency implications in some Azure regions. Though to achieve proximity, the functionality of [Application Volume Groups](../../../azure-netapp-files/application-volume-group-introduction.md) is in public preview. See also later in this article
 - The User ID for <b>sid</b>adm and the Group ID for `sapsys` on the virtual machines must match the configuration in Azure NetApp Files. 
+- Implement Linux OS parameters mentioned in SAP note [3024346](https://launchpad.support.sap.com/#/notes/3024346)
 
 > [!IMPORTANT]
 > For SAP HANA workloads, low latency is critical. Work with your Microsoft representative to ensure that the virtual machines and the Azure NetApp Files volumes are deployed in close proximity.  
@@ -115,6 +116,41 @@ Therefore you could consider to deploy similar throughput for the ANF volumes as
 
 Documentation on how to deploy an SAP HANA scale-out configuration with standby node using NFS v4.1 volumes that are hosted in ANF is published in [SAP HANA scale-out with standby node on Azure VMs with Azure NetApp Files on SUSE Linux Enterprise Server](./sap-hana-scale-out-standby-netapp-files-suse.md).
 
+## Linux Kernel Settings
+To successfully deploy SAP HANA on ANF Linux kernel settings need to be implemented according to SAP note [3024346](https://launchpad.support.sap.com/#/notes/3024346).
+
+For systems using High Availability (HA) using pacemaker and Azure Load Balancer following settings need to be implemeneted in file /etc/sysctl.d/91-NetApp-HANA.conf
+
+```
+net.core.rmem_max = 16777216
+net.core.wmem_max = 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
+net.ipv4.tcp_moderate_rcvbuf = 1
+net.ipv4.tcp_window_scaling = 1
+net.ipv4.tcp_timestamps = 0
+net.ipv4.tcp_sack = 1
+```
+
+Systems running with no pacemaker and Azure Load Balancer should implemented these settings in /etc/sysctl.d/91-NetApp-HANA.conf
+
+```
+net.core.rmem_max = 16777216
+net.core.wmem_max = 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
+net.ipv4.tcp_moderate_rcvbuf = 1
+net.ipv4.tcp_window_scaling = 1
+net.ipv4.tcp_timestamps = 1
+net.ipv4.tcp_sack = 1
+```
+
 ## Deployment through Azure NetApp Files application volume group for SAP HANA (AVG)
 To deploy ANF volumes with proximity to your VM, a new functionality called Azure NetApp Files application volume group for SAP HANA (AVG) got developed. **The functionality is currently in public preview**. There's a series of articles that document the functionality. Best is to start with the article [Understand Azure NetApp Files application volume group for SAP HANA](../../../azure-netapp-files/application-volume-group-introduction.md). As you read the articles, it becomes clear that the usage of AVGs involves the usage of Azure proximity placement groups as well. Proximity placement groups are used by the new functionality to tie into with the volumes that are getting created. To ensure that over the lifetime of the HANA system, the VM’s aren't going to be moved away from the ANF volumes, we recommend using a combination of Avset/ PPG for each of the zones you deploy into.
 The order of deployment would look like:

articles/virtual-machines/workloads/sap/sap-hana-high-availability-netapp-files-red-hat.md

@@ -388,10 +388,10 @@ For more information about the required ports for SAP HANA, read the chapter [Co
    10.32.0.5   hanadb2
    ```
 
-3. **[A]** Prepare the OS for running SAP HANA on Azure NetApp with NFS, as described in SAP note [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.  
+3. **[A]** Prepare the OS for running SAP HANA on Azure NetApp with NFS, as described in SAP note [3024346 - Linux Kernel Settings for NetApp NFS](https://launchpad.support.sap.com/#/notes/3024346). Create configuration file */etc/sysctl.d/91-NetApp-HANA.conf* for the NetApp configuration settings.  
 
     <pre><code>
-    vi /etc/sysctl.d/netapp-hana.conf
+    vi /etc/sysctl.d/91-NetApp-HANA.conf
     # Add the following entries in the configuration file
     net.core.rmem_max = 16777216
     net.core.wmem_max = 16777216

articles/virtual-machines/workloads/sap/sap-hana-high-availability-netapp-files-suse.md

@@ -367,10 +367,10 @@ For more information about the required ports for SAP HANA, read the chapter [Co
    10.3.0.5   hanadb2
    ```
 
-2.**[A]** Prepare the OS for running SAP HANA on Azure NetApp with NFS, as described in SAP note [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.  
+2.**[A]** Prepare the OS for running SAP HANA on Azure NetApp with NFS, as described in SAP note [3024346 - Linux Kernel Settings for NetApp NFS](https://launchpad.support.sap.com/#/notes/3024346). Create configuration file */etc/sysctl.d/91-NetApp-HANA.conf* for the NetApp configuration settings.  
 
    ```
-   vi /etc/sysctl.d/netapp-hana.conf
+   vi /etc/sysctl.d/91-NetApp-HANA.conf
    # Add the following entries in the configuration file
    net.core.rmem_max = 16777216
    net.core.wmem_max = 16777216

articles/virtual-machines/workloads/sap/sap-hana-high-availability-scale-out-hsr-rhel.md

@@ -267,10 +267,10 @@ Configure and prepare your operating system by doing the following:
      10.23.1.207 hana-s2-db3-hsr
     ```
 
-1. **[A]** Prepare the operating system for running SAP HANA. For more information, see SAP note [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 Azure NetApp Files configuration settings.  
+1. **[A]** Prepare the operating system for running SAP HANA. For more information, see SAP note [3024346 - Linux Kernel Settings for NetApp NFS](https://launchpad.support.sap.com/#/notes/3024346). Create configuration file */etc/sysctl.d/91-NetApp-HANA.conf* for the Azure NetApp Files configuration settings.  
 
     <pre><code>
-    vi /etc/sysctl.d/netapp-hana.conf
+    vi /etc/sysctl.d/91-NetApp-HANA.conf
     # Add the following entries in the configuration file
     net.core.rmem_max = 16777216
     net.core.wmem_max = 16777216

articles/virtual-machines/workloads/sap/sap-hana-high-availability-scale-out-hsr-suse.md

@@ -265,10 +265,10 @@ Configure and prepare your OS by doing the following steps:
      10.23.1.201     hana-s2-db3-hsr
     ```
 
-3. **[A]** Prepare the OS for running SAP HANA on NetApp Systems with NFS, as described in SAP note [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.  
+3. **[A]** Prepare the OS for running SAP HANA on NetApp Systems with NFS, as described in SAP note [3024346 - Linux Kernel Settings for NetApp NFS](https://launchpad.support.sap.com/#/notes/3024346). Create configuration file */etc/sysctl.d/91-NetApp-HANA.conf* for the NetApp configuration settings.  
 
     <pre><code>
-    vi /etc/sysctl.d/netapp-hana.conf
+    vi /etc/sysctl.d/91-NetApp-HANA.conf
     # Add the following entries in the configuration file
     net.core.rmem_max = 16777216
     net.core.wmem_max = 16777216

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

@@ -326,10 +326,10 @@ 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 SAP note [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.  
+3. **[A]** Prepare the OS for running SAP HANA on Azure NetApp with NFS, as described in SAP note [3024346 - Linux Kernel Settings for NetApp NFS](https://launchpad.support.sap.com/#/notes/3024346). Create configuration file */etc/sysctl.d/91-NetApp-HANA.conf* for the NetApp configuration settings.  
 
     <pre><code>
-    vi /etc/sysctl.d/netapp-hana.conf
+    vi /etc/sysctl.d/91-NetApp-HANA.conf
     # Add the following entries in the configuration file
     net.core.rmem_max = 16777216
     net.core.wmem_max = 16777216

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

@@ -318,10 +318,10 @@ Configure and prepare your OS by doing the following steps:
 
     Reboot the VM to activate the changes.  
 
-3. **[A]** Prepare the OS for running SAP HANA on NetApp Systems with NFS, as described in SAP note [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.  
+3. **[A]** Prepare the OS for running SAP HANA on NetApp Systems with NFS, as described in SAP note [3024346 - Linux Kernel Settings for NetApp NFS](https://launchpad.support.sap.com/#/notes/3024346). Create configuration file */etc/sysctl.d/91-NetApp-HANA.conf* for the NetApp configuration settings.  
 
     <pre><code>
-    vi /etc/sysctl.d/netapp-hana.conf
+    vi /etc/sysctl.d/91-NetApp-HANA.conf
     # Add the following entries in the configuration file
     net.core.rmem_max = 16777216
     net.core.wmem_max = 16777216