The total bandwidth is no longer limited by the bandwidth of a single cluster node, but rather depends on the capability of the backing storage system. The maximum share bandwidth is the total bandwidth of all file server cluster nodes. This active/active configuration makes it possible to scale file server clusters further, without a complex configuration with multiple volumes, shares and cluster resources. SMB Scale-out allows SMB 3.0 in a cluster configuration to show a share in all nodes of a cluster. SMB Multichannel allows file servers to use multiple network connections simultaneously and provides increased throughput.įor more info about SMB Multichannel, see Deploy SMB Multichannel. SMB Direct is not required in any SMB configuration, but it' s always recommended for those who want lower latency and lower CPU utilization.įor more info about SMB Direct, see Improve Performance of a File Server with SMB Direct. All RDMA interfaces that are compatible with SMB Direct are required to also implement a TCP/IP stack, and SMB Multichannel is aware of that. However, if for any reason the SMB client fails to connect using the RDMA path, it will simply continue to use TCP/IP connections instead. Whenever SMB detects an RDMA-capable network, it automatically tries to use the RDMA capability. SMB Direct introduced the ability to use RDMA network interfaces for high throughput with low latency and low CPU utilization. For more info, see SMB in Windows Server 20 R2 2012 and What's new in SMB 3.1.1. This version introduced technologies that may significantly improve performance and availability of the file server. SMB 3.0 was introduced in Windows Server 2012 and further enhanced in Windows Server 2012 R2 (SMB 3.02) and Windows Server 2016 (SMB 3.1.1). You can check which version of SMB is in use on your network by using Windows PowerShell Get-SMBConnection on clients and Get-SMBSession | FL on servers. The highest protocol version currently available is SMB 3.1.1 in Windows Server 2022, Windows Server 2016 and Windows 10. SMB performance tuningįile server performance and available tunings depend on the SMB protocol that is negotiated between each client and the server, and on the deployed file server features. The former option reduces CPU overhead by reducing console output and the latter reduces network traffic. When you use Xcopy, we recommend adding the /q and /k options to your existing parameters. We also recommend using the /log option to reduce console output by redirecting logs to a NUL device or to a file. Introduced in Windows Server 2008 R2, the /mt option of Robocopy can significantly improve speed on remote file transfers by using multiple threads when copying multiple small files. Windows Server has several built-in file copy utilities that you can run by using a command prompt. Ensure that the latest, most resilient, and fastest storage and networking device drivers are installed.Ĭopying files is a common operation performed on a file server. These might include SMB signing, client-side caching, file system mini-filters, search service, scheduled tasks, NTFS encryption, NTFS compression, IPSEC, firewall filters, Teredo, and SMB encryption.Įnsure that the BIOS and operating system power management modes are set as needed, which might include High Performance mode or altered C-State. In this article SMB configuration considerationsĭo not enable any services or features that your file server and clients do not require.
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