Managing 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

Log streams can be created in two ways. They are automatically created when other services are connected to LTS, or you can create one manually by following the steps described here.

On the LTS console, click on the left of a log group name.
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.
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. After a log stream is created, its name cannot be changed.
Click OK. In the log stream list, you can view information such as the log stream name and operations.

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.

In the log stream list, locate the target log stream and click in the Operation column.
Enter DELETE and click OK.

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.
Configuring a metric filter
Click in the Operation column of a log stream. On the displayed page, configure the metric filter.

LTS extracts your specified keyword from logs so that you can monitor it and set alarms on AOM (Application Operations Management).
Details
Click in the Operation column of a log stream to view its details, including the log stream name, log stream ID, log retention duration (days), creation type, and creation time.