Merge branch 'MicrosoftDocs:main' into Broken-link-fix-likebupt

Author: pritamso

articles/storage/blobs/network-file-system-protocol-support-how-to.md

@@ -7,7 +7,7 @@ author: normesta
 ms.subservice: blobs
 ms.service: storage
 ms.topic: conceptual
-ms.date: 05/12/2023
+ms.date: 06/21/2023
 ms.author: normesta
 ms.reviewer: yzheng
 ---
@@ -133,8 +133,10 @@ Create a directory on your Linux system and then mount the container in the stor
      > [!TIP]
      > By using the `-t aznfs` mount option, you ensure that the NFS client always remains correctly connected to the storage endpoint even if the endpoint IP changes after the mount. NFS shares that are mounted by using the `-t nfs` mount option might become disconnected from the storage endpoint if the IP address of that endpoint changes.
 
-> [!NOTE]
-> Other optional parameters are available with the mount command. Those parameters primarily affect client-side behavior. `sys` is the only value that is currently supported by the `sec` option.
+     Other optional parameters are available with the mount command. Those parameters primarily affect client-side behavior. `sys` is the only value that is currently supported by the `sec` option.
+
+     > [!IMPORTANT]
+     > The `nconnect` mount option works only on clients that have **Azure nconnect support**. Using the `nconnect` option on an unsupported client will decrease throughput and cause commands to timeout or work incorrectly. To learn more about how to ensure that your client has Azure nconnect support, see [Increase the number of TCP connections](network-file-system-protocol-support-performance.md#increase-the-number-of-tcp-connections). 
 
 ## Resolve common errors
 

articles/storage/blobs/network-file-system-protocol-support-performance.md

@@ -7,7 +7,7 @@ author: normesta
 ms.subservice: blobs
 ms.service: storage
 ms.topic: conceptual
-ms.date: 06/03/2022
+ms.date: 06/21/2023
 ms.author: normesta
 ms.reviewer: yzheng
 ---
@@ -57,6 +57,29 @@ It takes longer time to complete an overwrite operation than a new write operati
 
 Some applications may require low latency in addition to high throughput. You can deploy [Azure HPC Cache](../../hpc-cache/nfs-blob-considerations.md) to improve latency significantly. Learn more about [Latency in Blob storage](storage-blobs-latency.md).
 
+## Increase the number of TCP connections
+
+You can use the `nconnect` mount option to get higher aggregate read and write performance from a single VM but only if your Linux kernel has **Azure nconnect support**. 
+
+`nconnect` is a client-side Linux mount option that allows you to use multiple TCP connections between the client and the Blob service endpoint. You can use the `nconnect` option in the mount command to specify the number of TCP connections that you want create (for example: `mount -t aznfs -o nconnect=16,sec=sys,vers=3,nolock,proto=tcp <storage-account-name>.blob.core.windows.net:/<storage-account-name>/<container-name>  /nfsdatain`).
+
+> [!IMPORTANT]
+> While the latest Linux distributions fully support nconnect, you should use this option only if your kernel has Azure nconnect support. Using the `nconnect` mount option without Azure nconnect support will decrease throughput, cause multiple timeouts, and cause commands such as `READDIR` and `READIRPLUS` to work incorrectly. 
+
+Azure nconnect support is available with most of the recent Ubuntu kernals that can be used with Azure virtual machines. To find out if Azure nconnect support is available for your kernel, run the following command.
+
+```
+[ -e /sys/module/sunrpc/parameters/enable_azure_nconnect ] && echo "Yes" || echo "No"
+```
+
+If Azure nconnect support is available for your kernel, then `Yes` is printed to the console. Otherwise, `'No` is printed to the console.
+
+If Azure nconnect support is available, then enable it by running the following command.
+
+```
+echo Y > /sys/module/sunrpc/parameters/enable_azure_nconnect
+```
+
 ## Other best practice recommendations
 
 - Use VMs with sufficient network bandwidth.