cloud: add TiDB Serverless Export

TOC-tidb-cloud.md

@@ -124,6 +124,7 @@
       - [GitHub Integration](/tidb-cloud/branch-github-integration.md)
     - [Manage Spending Limit](/tidb-cloud/manage-serverless-spend-limit.md)
     - [Back Up and Restore TiDB Serverless Data](/tidb-cloud/backup-and-restore-serverless.md)
+    - [Export Data from TiDB Serverless](/tidb-cloud/serverless-export.md)
   - Manage TiDB Dedicated Clusters
     - [Create a TiDB Dedicated Cluster](/tidb-cloud/create-tidb-cluster.md)
     - Connect to Your TiDB Dedicated Cluster

tidb-cloud/serverless-export.md

@@ -0,0 +1,127 @@
+---
+title: Export Data from TiDB Serverless
+summary: Learn how to export data from TiDB Serverless clusters.
+---
+
+# Export Data from TiDB Serverless
+
+TiDB Serverless Export (Beta) is a service that enables you to export data from a TiDB Serverless cluster to local storage or an external storage service. You can use the exported data for backup, migration, data analysis, or other purposes.
+
+While you can also export data using tools such as [mysqldump](https://dev.mysql.com/doc/refman/8.0/en/mysqldump.html) and TiDB [Dumpling](https://docs.pingcap.com/tidb/dev/dumpling-overview), TiDB Serverless Export offers a more convenient and efficient way to export data from a TiDB Serverless cluster. It brings the following benefits:
+
+- Convenience: the export service provides a simple and easy-to-use way to export data from a TiDB Serverless cluster, eliminating the need for additional tools or resources.
+- Isolation: the export service uses separate computing resources, ensuring isolation from the resources used by your online services.
+- Consistency: the export service ensures the consistency of the exported data without causing locks, which does not affect your online services.
+
+## Features
+
+This section describes the features of TiDB Serverless Export.
+
+### Export location
+
+You can export data to local storage or [Amazon S3](https://aws.amazon.com/s3/).
+
+> **Note:**
+>
+> If the size of the data to be exported is large (more than 100 GiB), it is recommended that you export it to Amazon S3.
+
+**Local storage**
+
+Exporting data to local storage has the following limitations:
+
+- Exporting multiple databases to local storage at the same time is not supported.
+- Exported data is saved in the stashing area and will expire after two days. You need to download the exported data in time.
+- If the storage space of stashing area is full, you will not be able to export data to local storage.
+
+**Amazon S3**
+
+To export data to Amazon S3, you need to provide an [access key](https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_access-keys.html) for your S3 bucket. Make sure the access key has read and write access for your S3 bucket, including at least these permissions: `s3:PutObject` and `s3:ListBucket`.
+
+### Data filtering
+
+You can filter data by specifying the database and table you want to export. If you specify a database without specifying a table, all tables in that specified database will be exported. If you do not specify a database when you export data to Amazon S3, all databases in the cluster will be exported.
+
+> **Note:**
+>
+> You must specify the database when you export data to local storage.
+
+### Data formats
+
+You can export data in the following formats:
+
+- `SQL` (default): export data in SQL format.
+- `CSV`: export data in CSV format.
+
+Then the schema and data will be exported in the following naming rules:
+
+- Database schema: {database}-schema-create.sql
+- Table schema: {database}.{table}-schema.sql
+- Data: {database}.{table}.{0001}.{sql|csv}
+- Compressed data: {database}.{table}.{0001}.{sql|csv}.{compress}
+
+### Data compression
+
+You can compress the exported data using the following algorithms:
+
+- `gzip` (default): compress the exported data with gzip.
+- `snappy`: compress the exported data with snappy.
+- `zstd`: compress the exported data with zstd.
+- `none`: do not compress the exported data.
+
+### Cancel export
+
+You can cancel an export task that is in the running state.
+
+## Examples
+
+Currently, you can manage export tasks using [TiDB Cloud CLI](/tidb-cloud/cli-reference.md).
+
+### Export data to local storage
+
+1. Create an export task that specifies the database and table you want to export:
+
+   ```shell
+   ticloud serverless export create -c <cluster-id> --database <database> --table <table>
+   ```
+
+    You will get an export ID from the output.
+
+2. After the export is successful, download the exported data to your local storage:
+
+   ```shell
+   ticloud serverless export download -c <cluster-id> -e <export-id>
+   ```
+
+### Export data to Amazon S3
+
+```shell
+ticloud serverless export create -c <cluster-id> --bucket-uri <bucket-uri> --access-key-id <access-key-id> --secret-access-key <secret-access-key>
+```
+
+### Export with the CSV format
+
+```shell
+ticloud serverless export create -c <cluster-id> --file-type CSV
+```
+
+### Export the whole database
+
+```shell
+ticloud serverless export create -c <cluster-id> --database <database>
+```
+
+### Export with snappy compression
+
+```shell
+ticloud serverless export create -c <cluster-id> --compress snappy
+```
+
+### Cancel an export task
+
+```shell
+ticloud serverless export cancel -c <cluster-id> -e <export-id>
+```
+
+## Pricing
+
+The export service is free during the beta period. You only need to pay for the [Request Units (RUs)](/tidb-cloud/tidb-cloud-glossary.md#request-unit) generated during the export process of successful or canceled tasks. For failed export tasks, you will not be charged.