Realtime Compute provides a fault tolerance mechanism that allows you to restore data streams so that they are consistent with Realtime Compute. The core of the fault tolerance mechanism is to create consistent snapshots of distributed data streams and their states. These snapshots act as consistency checkpoints to which the system can fall back if a failure occurs.

Go to the Checkpoints tab

  1. Go to the Job Administration page.
    1. Log on to the Realtime Compute development platform.
    2. In the top navigation bar, click Administration.
    3. On the Jobs page that appears, click the target job name under the Job Name field.
  2. On the Job Administration page that appears, click the Checkpoints tab.

Overview

Note This feature is only available in Realtime Compute V3.0.0 and later.
The Overview tab displays the latest checkpoint information, such as the process, duration, and state size of the checkpoint at each node.

History

Note This feature is only available in Realtime Compute V3.0.0 and later.
The History tab displays recent checkpoint information. Click the plus sign (+) at the beginning of a row to display the related checkpoint information, such as the process, duration, and state size of the checkpoint at each node.

Summary

Note This feature is only available in Realtime Compute V3.0.0 and later.
The Summary tab displays the average, maximum, and minimum values of completed checkpoints.

Configuration

Note This feature is only available in Realtime Compute V3.0.0 and later.
The Configuration tab displays the configuration information of checkpoints.

Completed Checkpoints

Note This feature is only available in Realtime Compute versions earlier than V3.0.0.
The Completed Checkpoints tab displays the information of completed checkpoints.
Parameter Description
ID The ID of a checkpoint.
Start Time The start time of a checkpoint.
Durations (ms) The time consumed by a checkpoint.

Task Latest Completed Checkpoint

Note This feature is only available in Realtime Compute versions earlier than V3.0.0.
The Task Latest Completed Checkpoint tab displays the details of the latest checkpoint.
Parameter Description
SubTask ID The ID of a subtask.
State Size (Bytes) The state size of a checkpoint.
Durations (ms) The time consumed by a checkpoint.