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| title: Stream Data from TiDB Cloud Dedicated to TiDB Cloud Serverless | ||
| summary: This document explains how to stream data from a TiDB Cloud Dedicated cluster to a TiDB Cloud Serverless cluster. There are restrictions on the number of changefeeds and regions available for the feature. Prerequisites include extending tidb_gc_life_time, backing up data, and obtaining the start position of TiDB Cloud sink. To create a TiDB Cloud sink, navigate to the cluster overview page, establish the connection, customize table and event filters, fill in the start replication position, specify the changefeed specification, review the configuration, and create the sink. Finally, restore tidb_gc_life_time to its original value. | ||
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| # Stream Data from TiDB Cloud Dedicated to TiDB Cloud Serverless | ||
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| This document describes how to stream data from a TiDB Cloud Dedicated cluster to a TiDB Cloud Serverless cluster. | ||
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| > **Note:** | ||
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| > To use the changefeed feature, make sure that your TiDB Cloud Dedicated cluster version is v6.1.3 or later. | ||
| ## Restrictions | ||
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@@ -5,18 +5,22 @@ summary: Learn about data streaming concepts for TiDB Cloud. | |||||
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| # Data Streaming | ||||||
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| TiDB Cloud lets you stream data changes from your TiDB Cluster to other systems such as Apache Kafka, MySQL, and object storage. | ||||||
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| - For TiDB Cloud Dedicated, you can stream data to Apache Kafka, Apache Pulsar, MySQL, TiDB Cloud Serverless, and cloud storage. | ||||||
| - For TiDB Cloud Serverless, you can stream data to Apache Kafka. | ||||||
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| ## Changefeed | ||||||
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| TiDB Cloud changefeed is a continuous data stream that helps you replicate data changes from TiDB Cloud to other data services. | ||||||
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| - For TiDB Cloud Dedicated, you can access the changefeed feature on the **Changefeed** page in the [TiDB Cloud console](https://tidbcloud.com/). | ||||||
| - For TiDB Cloud Serverless, you can use the changefeed feature in [TiDB Cloud CLI](/tidb-cloud/get-started-with-cli). | ||||||
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| You can create a changefeed, view a list of existing changefeeds, and operate the existing changefeeds (such as scaling, pausing, resuming, editing, and deleting a changefeed). | ||||||
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| Replication includes only incremental data changes by default. If existing data must be replicated, it must be exported and loaded into the target system manually before starting the changefeed. | ||||||
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| In TiDB Cloud, replication can be tailored by defining table filters (to specify which tables to replicate) and event filters (to include or exclude specific types of events such as `INSERT` or `DELETE`). | ||||||
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| For more information, see [Changefeed for TiDB Cloud Dedicated](/tidb-cloud/changefeed-overview.md) and [Changefeed for TiDB Cloud Serverless](/tidb-cloud/serverless-changefeed-overview.md). | ||||||
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| title: Changefeed for TiDB Cloud Serverless | ||||||
| summary: TiDB Cloud changefeed helps you stream data from TiDB Cloud to other data services. | ||||||
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| # Changefeed for TiDB Cloud Serverless (Beta) | ||||||
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| TiDB Cloud changefeed helps you stream data from TiDB Cloud to other data services. This document provides an overview of the changefeed feature for TiDB Cloud Serverless. | ||||||
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| > **Note:** | ||||||
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| > - Currently, you can manage changefeeds for TiDB Cloud Serverless only with [TiDB Cloud CLI](/tidb-cloud/get-started-with-cli.md). | ||||||
| > - Currently, TiDB Cloud only allows up to 100 changefeeds per cluster. | ||||||
| > - Currently, TiDB Cloud only allows up to 100 table filter rules per changefeed. | ||||||
| > - For [TiDB Cloud Dedicated clusters](/tidb-cloud/select-cluster-tier.md#tidb-cloud-dedicated), see [Changefeed for TiDB Cloud Dedicated](/tidb-cloud/changefeed-overview.md). | ||||||
| ## Create a changefeed | ||||||
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| To create a changefeed, refer to the following document: | ||||||
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| - [Sink to Apache Kafka](/tidb-cloud/serverless-changefeed-sink-to-apache-kafka.md) | ||||||
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| ## List the changefeeds for your cluster | ||||||
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| To list the changefeeds for your cluster, run the following TiDB Cloud CLI command: | ||||||
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| ```bash | ||||||
| ticloud serverless changefeed list --cluster-id <cluster-id> | ||||||
| ## Pause or resume a changefeed | ||||||
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| To pause a changefeed, run the following TiDB Cloud CLI command: | ||||||
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| ```bash | ||||||
| ticloud serverless changefeed pause --cluster-id <cluster-id> --changefeed-id <changefeed-id> | ||||||
| ``` | ||||||
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| To resume a changefeed, run the following TiDB Cloud CLI command: | ||||||
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| ```bash | ||||||
| ticloud serverless changefeed resume --cluster-id <cluster-id> --changefeed-id <changefeed-id> | ||||||
| ``` | ||||||
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| ## Edit a changefeed | ||||||
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| > **Note:** | ||||||
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| > TiDB Cloud currently only allows editing changefeeds in the paused status. | ||||||
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| To edit a changefeed to kafka, you need to pause the changefeed first, and then edit it with the following TiDB Cloud CLI command: | ||||||
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| ```bash | ||||||
| ticloud serverless changefeed edit --cluster-id <cluster-id> --changefeed-id <changefeed-id> --name <newname> --kafka <full-specified-kafka> --filter <full-specified-filter> | ||||||
| ``` | ||||||
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| ## Delete a changefeed | ||||||
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| To delete a changefeed, run the following TiDB Cloud CLI command: | ||||||
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| ```bash | ||||||
| ticloud serverless changefeed delete --cluster-id <cluster-id> --changefeed-id <changefeed-id> | ||||||
| ``` | ||||||
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| ## Changefeed billing | ||||||
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| Currently, the changefeed feature for TiDB Cloud Serverless is in beta and available for free. | ||||||
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| ## Changefeed states | ||||||
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| The state of a changefeed represents the running state of the changefeed. During the running process, the changefeed might fail with errors, or be manually paused or resumed. These behaviors can lead to changes of the changefeed state. | ||||||
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| The states are described as follows: | ||||||
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| - `CREATING`: the changefeed is being created. | ||||||
| - `CREATE_FAILED`: the changefeed creation fails. You need to delete the changefeed and create a new one. | ||||||
| - `RUNNING`: the changefeed runs normally and the checkpoint-ts proceeds normally. | ||||||
| - `PAUSED`: the changefeed is paused. | ||||||
| - `WARNING`: the changefeed returns a warning. The changefeed cannot continue due to some recoverable errors. The changefeed in this state keeps trying to resume until the state transfers to `RUNNING`. The changefeed in this state blocks [GC operations](https://docs.pingcap.com/tidb/stable/garbage-collection-overview). | ||||||
| - `RUNNING_FAILED`: the changefeed fails. Due to some errors, the changefeed cannot resume and cannot be recovered automatically. If the issues are resolved before the garbage collection (GC) of the incremental data, you can manually resume the failed changefeed. The default Time-To-Live (TTL) duration for incremental data is 24 hours, which means that the GC mechanism does not delete any data within 24 hours after the changefeed is interrupted. | ||||||
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