There are several ways you can tune the performance of the Network File System (NFS) on a Linux system:
Use a high-speed network connection: To improve the performance of NFS, you should use a fast and stable network connection. This can include using high-speed Ethernet, Gigabit Ethernet, or faster, and minimizing the distance between the NFS client and server.
Use a high-performance filesystem: You can also improve the performance of NFS by using a high-performance filesystem on the server. This can include using a journaling filesystem, such as ext4 or XFS, or a filesystem that is optimized for NFS, such as GlusterFS or Lustre.
Use NFSv4: The NFSv4 protocol offers several performance improvements over the older NFSv3 protocol, including support for parallelism and improved security. You should consider using NFSv4 if possible.
Use NFS over TCP: By default, NFS uses the User Datagram Protocol (UDP) to transfer data. However, you can also use the Transmission Control Protocol (TCP) to improve the performance of NFS, especially over long distances or high-latency networks. You can use the tcp option in the /etc/exports file to enable NFS over TCP.
Use async writes: By default, NFS uses synchronous writes, which means that the client waits for the server to acknowledge the write before it can proceed. You can improve the performance of NFS by enabling async writes, which allows the client to send the write request to the server and then continue without waiting for the server's acknowledgement. You can use the async option in the /etc/exports file to enable async writes.
Increase the number of RPC requests: The Remote Procedure Call (RPC) protocol is used by NFS to send requests and receive responses between the client and server. You can improve the performance of NFS by increasing the number of RPC requests that are allowed at the same time. You can use the rsize and wsize options in the /etc/exports file to increase the maximum RPC request size.
Use a larger read-ahead cache: NFS uses a read-ahead cache to improve the performance of sequential reads. You can improve the performance of NFS by increasing the size of the read-ahead cache. You can use the read-ahead option in the /etc/fstab file to increase the size of the read-ahead cache.
Use a larger write buffer: NFS also uses a write buffer to improve the performance of sequential writes. You can improve the performance of NFS by increasing the size of the write buffer. You can use the wsize option in the /etc/fstab file to increase the size of the write buffer.
Keep in mind that the optimal configuration for NFS may vary depending on your network and workload. You may want to experiment with different settings and measure the performance to find the best configuration for your needs.