Help Center> Log Tank Service> User Guide> Log Management> Log Streams
Updated on 2024-04-19 GMT+08:00
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Log Streams

A log stream is the basic unit for reading and writing logs. You can separate different types of logs (such as operation logs and access logs) into different log streams for easier management. Sorting logs into different log streams makes it easier to find specific logs when you need them.

Up to 100 log streams can be created in a log group. The upper limit cannot be increased. If you cannot create a log stream because the upper limit is reached, you are advised to delete log streams that are no longer needed and try again, or create log streams in a new log group.

Prerequisites

You have created a log group.

Creating a Log Stream

  1. On the LTS console, click on the left of a log group name.
  2. Click Create Log Stream in the upper left corner of the displayed page, and enter a log stream name. After a log stream is created, its name cannot be changed. A log stream name:
    • Can contain only letters, digits, underscores (_), hyphens (-), and periods (.). The prefix cannot start with a period or underscore, or end with a period.
    • Can contain 1 to 64 characters.
    Figure 1 Creating a log stream

    Collected logs are sent to the created log stream. If there are a large number of logs, you can create multiple log streams and name them for quick log search.

  3. Select an enterprise project. You can click View Enterprise Projects to view all enterprise projects.
  4. If you enable Log Retention Duration on this page, you can set the log retention duration specifically for the log stream. If you disable it, the log stream will inherit the log retention setting of the log group.
  5. Anonymous write is disabled by default and applies to log reporting on Android, iOS, applets, and browsers. If anonymous write is enabled, the anonymous write permission is granted to the log stream, and no valid authentication is performed, which may generate dirty data.
  6. Set the tag value in the Key=Value format, for example, a=b. For details, see Tag Management.
  7. Enter remarks. The value contains 0 to 1024 characters.
  8. Click OK. In the log stream list, you can view information such as the log stream name and operations.
    • You can view the log stream billing status. For details, see Price Calculator.
    • The function of reporting SDRs by log stream is in Friendly User Test (FUT). You can submit a service ticket to enable it.

Modifying a Log Stream

By default, a log stream inherits the log retention setting from the log group it belongs to.

  1. In the log stream list, locate the target log stream and click in the Operation column.
  2. In the dialog box displayed, modify the log stream name and log retention duration.
    Figure 2 Modifying a log stream
    • If you disable Log Retention Duration, the log stream will inherit the log retention setting of the log group.
    • If you enable Log Retention Duration, you can set the log retention duration specifically for the log stream.
    • The logs that exceed the retention period will be deleted automatically. You can transfer logs to OBS buckets for long-term storage.
    • Currently, logs of whitelisted users can be retained for 1,095 days. If necessary, submit a service ticket.
    • For details about how to add a tag, see Tag Management.
  3. Click OK.
  4. After the modification is successful, move the cursor over the log stream name. The new and original log stream names are displayed.
    Figure 3 Log stream name

Deleting a Log Stream

You can delete a log stream that is no longer needed. Deleting a log stream will also delete the log data in the log stream. Deleted log streams cannot be recovered. Exercise caution when performing the deletion.

  • Before deleting a log stream, check whether any log collection task is configured for it. If there is a log collection task, deleting the log stream may affect log reporting.
  • If you want to delete a log stream that is associated with a log transfer task, delete the task first.
  1. In the log stream list, locate the target log stream and click in the Operation column.
    Figure 4 Deleting a log stream
  2. Enter DELETE and click OK.
    Figure 5 Deleting a log stream

Other Operations

  • Adding a log stream to favorites

    Click in the Operation column of a log stream to add the log stream to favorites. The log stream is then displayed in My Favorites/My Favorites (Local Cache) on the console home page.

  • Details

    Click in the Operation column of a log stream to view its details, including the log stream name, log stream ID, and creation time.

Parent topic: Log Management