# Topic Management

The log topic is the basic unit for collecting, storing, and retrieving log data on the ULS log service platform. The collected massive logs are managed in units of log topics.

## Create a Topic

1. Log in to the ULS console and enter the ULS instance list page.
2. On the instance list page, click on the instance name to enter the instance details page, then enter the topic management tab, and click to create a topic.
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3. Fill in the topic name (support for letters, numbers, _), the number of partitions, and the preservation time.
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> Note, save time:
>
> - The maximum retention period is 360 days
> - Permanent preservation

## Query Topic

1. Click the search to jump to the topic log query page.

## Edit a Topic

1. Modify the topic save time.

## Delete a Topic

> Note:
>
> - Once the topic is deleted, the data cannot be recovered.

1. In the topic list, find the topic you need to delete, and click delete in the operation list on the right.