GridGain Developers Hub

Compute Grid

You can use the Compute screen to monitor Compute tasks that are executed on the cluster.

Compute Grid Screen

GridGain Portal constantly checks for new tasks that were added and provides a number of new tasks since last update. Click Refresh to load all new tasks.

Distributed Computing Configuration

Distributed computing configuration is described in detail in the Distributed Computing section of GridGain documentation.

Below are some configuration parameters that are recommended for managing Compute jobs.

Priotity Ordering

To manage job and task priorities, you need to configure PriorityQueueCollisionSpi in your code. Detailed instructions can be found in the Priority Ordering section of GridGain documentation.

Monitoring Jobs

The primary table in this screen provides the following information:

Column Name Description

Session ID

The unique ID of the Compute job session.

Task Name

The name of the tasks, specified when it was created.

Status

Task status. Possible values:

  • Running - the task is still running.

  • Finished - the task is completed succesfully.

  • Failed - the task failed.

  • Canceled - the task is cancelled.

  • Unknown - something went wrong with the Outdated task, current status is not clear and there will be not new updates.

Reducer

The ID of a node that does map and reduce operations for the task.

Owner

The owner of the job. Empty if security is not configured.

Start Time

The time the job started at, in "month date, HH:MM:SS:mmm" format.

End Time

The time the job ended at, in "month date, HH:MM:SS:mmm" format. If the job is in progress or no data is available, shows N/A instead.

Duration

Hidden by default. Current job duration. Updates every second.

Nodes

Hidden by default. The number of nodes that are executing the task.

Priority

Hidden by default. Task priority.

Configuring visible columns

To configure visible columns, click ⋮ in table header. Then, click on table columns field and select fields that you want visible.

Extended Details

Click ⋮ for a Running task and select View Details to see extended information about the task. The detailed information table provides data about each subtask that is executed in a job.

Column Name Description

Node ID

Unique node ID

Queued

Number of queued jobs on a node.

Running

Number of running jobs on a node.

Suspended

Number of suspended jobs on a node.

Failed

Number of failed jobs on a node.

Canceled

Number of canceled jobs on a node.

Finished

Number of finished jobs on a node.

Total

Total number of jobs on a node.

Session Information

Click ⋮ and select View Session Attributes to see extended information about the session. This action is only available if you have `ComputeTaskSessionFullSupport ` configured for the cluster. The table contains the following information:

Column Name Description

Attribute Name

This column has a name of the session property. The properties listed are:

  • Endpoint status

  • Endpoint policy applied

  • Status of policy application

  • When session started

  • When session ended

  • Session duration

  • Session identifier

Value

Property value.

Canceling Tasks

Click ⋮ next to a task and select Cancel Task(s). The task will be canceled. This action is only available for Running tasks. This action can be applied to multiple tasks by first selecting them in the table.

Changing Task Priority

Click ⋮ next to a task and select Change Priority. In the subsequent dialog, set the task priority. PriorityQueueCollisionSpi must be configured on the cluster. This action can be applied to multiple tasks by first selecting them in the table.

Filtering Tasks

You can limit visible tasks by configuring 2 different filters. Newly received tasks are not filtered, so you will see the number of new tasks regardless of if they fall under filter conditions or not.

Premade Filters

There are some premade filters for common task states:

  • All

  • Running

  • Finished

  • Canceled

  • Failed

  • Outdated

  • Unknown

You can select them from the top of the page.

Extended Filters

You can configure additional filter options on the right of the screen.

Unlike quick filters, you can only have one extended filter active at a time. You can filter based on the following:

  • Task name;

  • Task priority;

  • Minimum duration of the task;

  • Start time;

  • End time.

  • Attribute, composed of:

    • Attribute name

    • Attribute filter

Extended filters will be reset if you leave the page, but you can save the URI to open the page with the same filter configuration.