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Does logging block my training?

“Is the logging function lazy? I don’t want to depend on the network to send results to your servers while executing loc …

How can I overwrite the logs from previous steps?

To overwrite logs from previous steps, use forking and rewind. Run forking is in Public Preview for Multi-tenant Cloud a …

How do I download the console log file from a run?

Weights & Biases stores your script’s stdout and stderr as output.log (or multipart chunks under logs/). Where to retrie …

How do I log a list of values?

You can log a list of values, such as per-step losses, with wandb.Run.log(). The following examples show two common appr …

How do I log runs launched by continuous integration or internal tools?

To launch automated tests or internal tools that log to Weights & Biases, create a Service Account on the team settings …

How do I log to the right wandb user on a shared machine?

When multiple users share a machine, runs can log to the wrong CoreWeave Forge account if you don’t explicitly set crede …

How do I preserve run data from ephemeral environments?

Set WANDB_DIR to a directory on persistent storage to preserve local run data and diagnostic logs in ephemeral environme …

How do I turn off logging?

You can stop Weights & Biases from logging data to the remote server, or keep logging enabled but suppress its warning m …

Which files should I check when my code crashes?

For the affected run, check debug.log and debug-internal.log in wandb/run- DATE _ TIME - RUN-ID /logs in the directory w …

Why are my metrics missing from wandb.log()?

If metrics logged with wandb.log() are not appearing in the Weights & Biases Models UI, there are several common causes. …

Why is console output not captured for my run?

Weights & Biases captures your script’s stdout and stderr and stores it as output.log on the run’s Files tab. By default …
Last modified on September 30, 2026