Refer to the exhibit. An administrator is troubleshooting performance issues for a SQL Server instance that uses SMB shares for data storage. Based on the output, which action should the administrator take to ensure the highest performance for SMB traffic?
Exhibit
PS C:\> Get-SmbClientNetworkInterface Interface Index : 12 RSS Capable : True RDMA Capable : True Speed : 100 Gbps IpAddress : 192.168.10.5 Interface Index : 15 RSS Capable : True RDMA Capable : False Speed : 1 Gbps IpAddress : 10.0.0.5
Trap 1: Disable RSS on Interface 12
Receive Side Scaling (RSS) allows network traffic to be distributed across multiple CPU cores to improve throughput. Disabling it on a 100 Gbps interface would severely degrade performance and increase the likelihood of a single CPU core becoming a bottleneck. RSS and RDMA work together to provide optimal performance for high-speed networking and storage traffic.
Trap 2: Configure SMB Multichannel to use only Interface 15
Interface 15 is a standard 1 Gbps adapter without RDMA capabilities. Restricting SMB traffic to this interface would cause a massive performance bottleneck for a SQL Server workload. SMB Multichannel should be allowed to use Interface 12, which offers 100 times the bandwidth and RDMA support for significantly lower latency and higher throughput.
Trap 3: Enable Jumbo Frames on Interface 15
Enabling Jumbo Frames on a 1 Gbps interface might provide a minor reduction in overhead, but it cannot compete with the 100 Gbps RDMA-capable interface. Interface 15 is intended for management traffic rather than high-performance storage. Tuning this interface would not resolve the performance issues described in the scenario compared to utilizing the RDMA interface.
- A
Disable RSS on Interface 12
Why wrong: Receive Side Scaling (RSS) allows network traffic to be distributed across multiple CPU cores to improve throughput. Disabling it on a 100 Gbps interface would severely degrade performance and increase the likelihood of a single CPU core becoming a bottleneck. RSS and RDMA work together to provide optimal performance for high-speed networking and storage traffic.
- B
Configure SMB Multichannel to use only Interface 15
Why wrong: Interface 15 is a standard 1 Gbps adapter without RDMA capabilities. Restricting SMB traffic to this interface would cause a massive performance bottleneck for a SQL Server workload. SMB Multichannel should be allowed to use Interface 12, which offers 100 times the bandwidth and RDMA support for significantly lower latency and higher throughput.
- C
Ensure SMB Direct is enabled and use Interface 12
Interface 12 supports RDMA and provides 100 Gbps speed, making it the ideal choice for SMB Direct. Enabling SMB Direct allows the server to bypass the OS kernel for data transfers, drastically reducing CPU overhead. This configuration ensures that the SQL Server can access its remote storage with the performance characteristics of local flash storage.
- D
Enable Jumbo Frames on Interface 15
Why wrong: Enabling Jumbo Frames on a 1 Gbps interface might provide a minor reduction in overhead, but it cannot compete with the 100 Gbps RDMA-capable interface. Interface 15 is intended for management traffic rather than high-performance storage. Tuning this interface would not resolve the performance issues described in the scenario compared to utilizing the RDMA interface.