wandb beta core

Manage a shared local wandb-core service for multi-process workloads.

wandb-core is the local backend process that handles run data, file uploads, and system metrics collection. By default, each process that calls wandb.init() starts its own backend. On a machine running many independent workers, that duplicates work and wastes CPU and memory.

Use these commands to start one detached wandb-core instance and point multiple workers on the same machine at it with the WANDB_SERVICE environment variable.

Typical workflow:

$ wandb beta core start
$ export WANDB_SERVICE=printed_value
$ python -m your_launcher
$ wandb beta core stop

For shell scripts, capture the raw WANDB_SERVICE value from stdout:

$ export WANDB_SERVICE="$(wandb beta core start)"

The shared service exits after 10 minutes of idleness by default. Override this with —idle-timeout on the start command.

Usage

wandb beta core COMMAND [ARGS]...

Commands

Command	Description
start	Start a detached wandb-core service.
stop	Stop a detached wandb-core service.