In previous sections we started several experiments, we also learned how to start a Tensorboard service to visualize a single experiment. In this section we will start a tensorboard to visualize and compare a selection of experiments.

Listing experiments

Polyaxon provides several ways to list runs, using the UI with the comparison table, using the API, or using the CLI.

Let’s use the CLI to show the current runs under a specific project:

polyaxon ops ls [-p PROJECT_NAME]

This command will show all runs created under a specific project, it will also show both service, job, dag, and matrix runs, and it will provide a mechanism for paginating the records. We can reduce the information in this list by providing a query similar to the UI.

polyaxon ops ls [-p PROJECT_NAME] -q "kind: job, metrics.loss: <0.3" -s "-metrics.loss" -l 5

The flags --query/-q, --sort/s, and --limit/-l allows to restrict the list based on the query specification, order by fields, and a limit.

You may notice that the list does not show important columns like metrics or params, we can add -io flag to show all inputs and outputs:

polyaxon ops ls [-p PROJECT_NAME] -q "kind: job, metrics.loss: <0.3" -s "-metrics.loss" -l 5 -io

Now we have way too many columns, we can do better by providing what columns to show using -c "column1, column2, ...", for instance let’s just show the uuid, learning_rate, loss and accuracy.

polyaxon ops ls [-p PROJECT_NAME] -q "kind: job, metrics.loss: <0.3" -s "-metrics.loss" -l 5 -io -c "uuid,in.learning_rate,out.loss,out.accuracy" 

Starting a Tensorboard for multiple runs

We were able to query, sort, and limit our runs, let’s try to start a Tensorboard service for the top 5 experiments based on loss. We need to pass the uuid values of those runs to the Tensorboard component:

polyaxon run --hub [-p PROJECT_NAME] tensorboard:multi-run -P uuids=UUID1,UUID2,UUID3,UUID4,UUID5

You will notice that this command is almost the same as the previous command for starting a single run Tensorboard, the only difference is that we are using a different tag for the tensorboard component. We are also passing a different parameter uuids that this tag is expecting.

Start Tensorboard directly from the artifacts store

Note: Requires Polyaxon v1.9.1 or higher.

When one or multiple experiments are still running the previous command is not very useful because it only loads the latest snapshot of the experiments’ outputs.

If you deployed Polyaxon with S3/GCS/Volume artifacts store, you can also point the Tensorboard directly to the artifacts store path instead of the Polyaxon’s context.

polyaxon run --hub tensorboard:multi-run-storepath -P uuids=UUID1,UUID2,UUID3,UUID4,UUID5

Note: This component version will not work with Azure or other artifacts store backend, because Tensorboard does not load the outputs natively from those services.

Starting a Tensorboard for multiple runs from the UI

On Polyaxon Cloud or Polyaxon EE, when a user selects several runs in the comparison table, a button called custom action appears, it allows to provide a component to run based on the selection. Users can use tensorboard:multi-run or tensorboard:multi-run-storepath to start a new Tensorboard based on that selection.