How to Use the Command 'pueue restart' (with examples)
The pueue restart command is part of the Pueue task management system, which provides a way to manage and queue asynchronous tasks in the command line environment. This command is specifically used to restart tasks that have either completed or failed, offering greater flexibility and control over task management without manually setting up each task again from scratch. Restarting tasks can be crucial for lengthy tasks that have failed due to temporary issues, or for retesting completed tasks with different parameters or settings. Below are several use cases of the command, each illustrated with practical examples.
Restart a specific task:
Code:
pueue restart task_id
Motivation:
In certain situations, you might find that an individual task has failed due to an external factor—such as network issues or resource limitations—or you need to rerun it for testing purposes. Instead of recreating and enqueuing the task again manually, you can simply restart it using its task ID.
Explanation:
pueue restart: This is the base command used to restart tasks within the Pueue ecosystem.task_id: This is a placeholder for the unique identifier of the task you wish to restart. Each task in Pueue is associated with an ID for easy reference and management.
Example output:
Task 2 has been restarted successfully.
Restart multiple tasks at once, and start them immediately (do not enqueue):
Code:
pueue restart --start-immediately task_id_1 task_id_2
Motivation:
Sometimes, multiple tasks may need to be rerun without having to wait in the queue. This is especially useful in a scenario where several tasks are independent of each other and can be executed concurrently to save time.
Explanation:
--start-immediately: This flag tells Pueue to commence execution of the tasks right away instead of lining them up in the queue.task_id_1 task_id_2: These identifiers correspond to the tasks that you want to restart and execute immediately.
Example output:
Task 3 and Task 4 have been restarted and started immediately.
Restart a specific task from a different path:
Code:
pueue restart --edit-path task_id
Motivation:
Occasionally, a task may rely on files or scripts that have been moved. In such cases, restarting the task from a new directory can be necessary to ensure it has access to the right files and resources.
Explanation:
--edit-path: This flag allows you to specify an alternative working directory for the task being restarted.task_id: This indicates the task that should be restarted from the new path.
Example output:
Task 5 has been restarted with a new path /new/working/path.
Edit a command before restarting:
Code:
pueue restart --edit task_id
Motivation:
Sometimes, changes to the initial command might be necessary before restarting a task, whether to modify arguments, environment variables or even what script or executable to run.
Explanation:
--edit: This allows you to modify the original command configuration prior to restarting the task.task_id: This refers to the specific task whose command you wish to edit before restarting.
Example output:
Task 6 command has been modified and the task restarted.
Restart a task in-place (without enqueuing as a separate task):
Code:
pueue restart --in-place task_id
Motivation:
This mode is helpful if you wish to maintain the same position of the task in the queue structure or if you don’t want to create additional task entries just from restarting an existing task.
Explanation:
--in-place: This argument ensures that the restarted task does not get added as a new task but instead occupies its original position in the task list.task_id: This indicates the individual task that will be restarted in-place.
Example output:
Task 7 has been restarted in-place without creating a new task entry.
Restart all failed tasks and stash them:
Code:
pueue restart --all-failed --stashed
Motivation:
When managing a batch of tasks, you may encounter scenarios where several tasks fail, potentially due to common issues like network disruptions. This command allows you to restart all these failed tasks collectively and stash them, readying them for execution once issues are resolved or resources become available.
Explanation:
--all-failed: This flag restarts all tasks in the queue that have failed at least once.--stashed: This option stashes the tasks once they are restarted, effectively placing them in a paused state for later execution.
Example output:
All failed tasks have been restarted and stashed.
Conclusion:
The pueue restart command offers powerful options for task management, allowing for specific tasks to be rerun with modified settings, quickly re-executing multiple tasks, making path-specific adjustments, editing commands, and handling failed task recovery efficiently. With these capabilities, systems administrators and power-users can enhance their workflow and task handling efficiency significantly.
