The NVIDIA Container Toolkit allows you to build and run GPU-accelerated containers by providing the necessary CUDA libraries and drivers inside the container, ensuring that the application can leverage the GPU.

Configuring BCM to export metrics in Prometheus format and using a Prometheus exporter is a standard and efficient way to integrate with monitoring systems that support Prometheus data. Using syslog server for logs ensures that the logs are forwarded and aggregated, thus integrating with existing enterprise monitoring system easily. Developing a custom script is more complex and less maintainable. Manually copying log files is not scalable. Connecting the monitoring system directly to the BCM database poses security risks and is not recommended.

The 'Address already in use' error in 'torch.distributed' typically arises when multiple processes attempt to bind to the same port for communication. Specifying a unique port for each distributed training job using '-master_port' or the 'MASTER PORT environment variable resolves this conflict. This prevents processes from interfering with each other.

MIG provides GPU resource isolation, but it does not isolate other system resources. CPU oversubscription, insufficient host memory, and network bandwidth limitations can all contribute to performance slowdowns, even with dedicated MIG instances. It's important to monitor and manage these resources in addition to GPU resources.

A multi-faceted approach is needed. Enforcing limits (A) prevents waste, education (B) helps users improve requests, accounting (C) provides feedback, and adjusting priority (D) discourages wasteful requests. A, B, C, D combined provide the best approach.