What are the differences between single machines and tow machines?

[Gironote]

I am currently working on this.
Single machine (node), multiple GPUs
$ python train.py --dist-url 'tcp://127.0.0.1:29500' --dist-backend 'nccl' --multiprocessing-distributed --world-size 1 --rank 0
I use a titian RTX. Is it right use this code? What are the differences between single machines and tow machines?

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this error occur.....
Do i have to use single gpu?

[maudzung]

Hi @Jihun-Kim-kmu
You have a single GPU, so you should follow the instruction for training on a single machine, single gpu (2.4.4.1)
You can read more here

[Gironote]

this step How many figures should I put in?
I tried
$ python train.py --gpu_idx 0 --multiscale_training --batch_size 128 --num_workers 0...
$ python train.py --gpu_idx 0 --multiscale_training --batch_size 128 --num_workers 1...
$ python train.py --gpu_idx 0 --multiscale_training --batch_size 128 --num_workers 16...

but train.py: error: argument --num_workers: invalid int value: '0...' this error occur
train.py: error: argument --num_workers: invalid int value: '1...' this error occur
train.py: error: argument --num_workers: invalid int value: '16...' this error occur