Analyses

An Analysis is the execution of a pipeline.

Starting Analyses

You can start an analysis from both the dedicated analysis screen or from the actual pipeline.

From Analyses

1. Navigate to Projects > Your_Project > Flow > Analyses.

2. Select » New Analysis.

3. Select a single Pipeline.

4. Configure the analysis settings.

5. Select » Start Analysis.

6. Refresh to see the analysis status. See lifecycle for more information on statuses.

7. If for some reason, you want to end the analysis before it can complete, select Manage > Abort analyses. Refresh to see the status update.

From Pipelines

1. Navigate to Projects > <Your_Project> > Flow > Pipelines

2. Select the pipeline to run.

3. Select » Start New Analysis.

4. Configure analysis settings.

5. Select » Start Analysis.

6. View the analysis status on the Analyses page. See lifecycle for more information on statuses.

7. If for some reason, you want to end the analysis before it can complete, select Manage > Abort analyses on the Analyses page.

Rerunning Analyses

Once an analysis has been executed, you can rerun it with the same settings or choose to modify the parameters when rerunning. Modifying the parameters is possible on a per-analysis basis. When selecting multiple analyses at once, they will be executed with the original parameters. Draft pipelines are subject to updates and thus can result in a different outcome when rerunning. ICA will display a warning message to inform you of this when you try to rerun an analysis based on a draft pipeline.

When there is an XML configuration change on a a pipline for which you want to rerun an analysis, ICA will display a warning and not fill out the parameters as it cannot guarantee their validity for the new XML.

Some restrictions apply when trying to rerun an analysis.

To rerun one or more analyses with te same settings:

1. Navigate to Projects > Your_Project > Flow > Analyses.

2. In the overview screen, select one or more anaylses.

3. Select Manage > Rerun analyses. The analyses will now be executed with the same parameters as their original run.

To rerun a single analysis with modified parameters:

1. Navigate to Projects > Your_Project > Flow > Analyses.

2. In the overview screen, open the details of the analysis you want to rerun by clicking on the analysis user reference.

3. Select Rerun. (at the top right)

4. Update the parameters you want to change.

5. Select Start Analysis The analysis will now be executed with the updated parameters.

Lifecycle

When an analysis is started, the availability of resources may impact the start time of the pipeline or specific steps after execution has started. Analyses are subject to delay when the system is under high load and the availability of resources is limited.

Logs

During the execution of an analysis, logs are produced for each process involved in the analysis lifecyle. In the analysis details view, the Logs tab is used to view the logs in near real time as they're produced in the running processes. A grid layout is used for analyses with more than 50 steps, a tiled view for analyses with 50 steps or less, though you can choose to also use the grid layout for those by means of the tile/grid button on the top right of the analysis log tab.

There are system processes involved in the lifeycle for all analyses (ie. downloading inputs, uploading outputs, etc.) and there are processes which are pipeline-specific, such as processes which execute the pipeline steps. The below table describes the system processes.

Additional log entries will show for the processes which execute the steps defined in the pipeline.

Each process shows as a distinct entry in the Logs view with a Queue Date, Start Date, and End Date.

The time between the Start Date and the End Date is used to calculate the duration. The time of the duration is used to calculate the usage-based cost for the analysis. Because this is an active calculation, sorting on this field is not supported.

Each log entry in the Logs view contains a checkbox to view the stdout and stderr log files for the process. Clicking a checkbox adds the log as a tab to the log viewer where the log text is displayed and made available for download.

Log Files

In the analysis output folder, the ica_logs subfolder will contain the stdout and stderr files. If you delete these files, no log information will be available on the analysis details > logs tab.

Log Streaming

Logs can also be streamed using websocket client tooling. The API to retrieve analysis step details returns websocket URLs for each step to stream the logs from stdout/stderr during the step's execution. Upon completion, the websocket URL is no longer available.

Analysis Output Mappings

By default, analysis outputs are directed to a new folder within the project where the analysis is launched. Analysis output mappings may be specified to redirect outputs to user-specified locations consisting of project and path. An output mapping consists of:

• the source path on the local disk of the analysis execution environment, relative to the working directory

• the data type, either FILE or FOLDER

• the target project ID to direct outputs to; analysis launcher must have contributor access to the project

• the target path relative to the root of the project data to write the outputs

Use the example analysis output mapping below for guidance.

In this example, 2 analysis output mappings are specified. The analysis writes data during execution in the working directory at paths out/test and out/test2. The data contained in these folders are directed to project with ID 4d350d0f-88d8-4640-886d-5b8a23de7d81 and at paths /output-testing-01/ and /output-testing-02/ respectively, relative to the root of the project data.

The following demonstrates the construction of the request body to start an analysis with the output mappings described above:

```json
{
...
    "analysisOutput":
    [
        {
            "sourcePath": "out/test1",
            "type": "FOLDER",
            "targetProjectId": "4d350d0f-88d8-4640-886d-5b8a23de7d81",
            "targetPath": "/output-testing-01/"
        },
        {
            "sourcePath": "out/test2",
            "type": "FOLDER",
            "targetProjectId": "4d350d0f-88d8-4640-886d-5b8a23de7d81",
            "targetPath": "/output-testing-02/"
        }
    ]
}
```

When the analysis completes the outputs can be seen in the ICA UI, within the folders designated in the payload JSON during pipeline launch (output-testing-01 and output-testing-02).

Tags

You can add and remove tags from your analyses.

1. Navigate to Projects > Your_Project > Flow > Analyses.

2. Select the analyses whose tags you want to change.

3. Select Manage > Manage tags.

4. Edit the user tags, reference data tags (if applicable) and technical tags.

5. Select Save to confirm the changes.

Hyperlinking

If you want to share a link to an analysis, you can copy and paste the URL from your browser when you have the analysis open. The syntax of the analysis link will be <hostURL>/ica/link/project/<projectUUID>/analysis/<analysisUUID>. Likewise, workflow sessions will use the syntax <hostURL>/ica/link/project/<projectUUID>/workflowSession/<workflowsessionUUID>. To prevent third parties from accessing data via the link when it is shared or forwarded, ICA will verify the access rights of every users when they open the link.

Restrictions

Input for analysis is limited to a total of 50,000 files (including multiple copies of the same file). You can have up to 50 concurrent analyses running per tenant. Additional analyses will be queued and scheduled when currently running analyses complete and free up positions.

Troubleshooting

Analysis failure due to an external event such as spot termination or node draining, will result in exit code 55. Retry the analysis.