From 9491c02a66549c3993c193485100142e01d1560b Mon Sep 17 00:00:00 2001 From: qiancai Date: Thu, 9 Dec 2021 18:53:57 +0800 Subject: [PATCH 01/12] add_dm_overview --- TOC.md | 3 +- dm/dm-overview.md | 91 ++++++++++++++++++++++++++++++++++ media/dm/dm-core-features.png | Bin 0 -> 22779 bytes tidb-in-kubernetes.md | 17 +++++++ 4 files changed, 110 insertions(+), 1 deletion(-) create mode 100644 dm/dm-overview.md create mode 100644 media/dm/dm-core-features.png create mode 100644 tidb-in-kubernetes.md diff --git a/TOC.md b/TOC.md index 17f1e60c0e065..63677856fcb5c 100644 --- a/TOC.md +++ b/TOC.md @@ -33,7 +33,7 @@ - [Hybrid Topology](/hybrid-deployment-topology.md) - Install and Start - [Use TiUP (Recommended)](/production-deployment-using-tiup.md) - - [Deploy in Kubernetes](https://docs.pingcap.com/tidb-in-kubernetes/stable) + - [Deploy in Kubernetes](/tidb-in-kubernetes.md) - [Verify Cluster Status](/post-installation-check.md) - Test Cluster Performance - [Test TiDB Using Sysbench](/benchmark/benchmark-tidb-using-sysbench.md) @@ -196,6 +196,7 @@ - [Deploy](/tidb-lightning/deploy-tidb-lightning.md) - [Precheck](/tidb-lightning/tidb-lightning-prechecks.md) - [Configure](/tidb-lightning/tidb-lightning-configuration.md) + - [TiDB Data Migration](/dm/dm-overview.md) - Key Features - [Checkpoints](/tidb-lightning/tidb-lightning-checkpoints.md) - [Table Filter](/table-filter.md) diff --git a/dm/dm-overview.md b/dm/dm-overview.md new file mode 100644 index 0000000000000..e331aa3d094af --- /dev/null +++ b/dm/dm-overview.md @@ -0,0 +1,91 @@ +--- +title: TiDB Data Migration +summary: Learn about the TiDB Data Migration tool +--- + +# TiDB Data Migration + +[TiDB Data Migration](https://github.com/pingcap/dm) (DM) is an integrated data migration task management platform, which supports the full data migration and the incremental data replication from MySQL-compatible databases (such as MySQL, MariaDB, and Aurora MySQL) into TiDB. It can help to reduce the operation cost of data migration and simplify the troubleshooting process. + +## DM versions + +The stable versions of DM include v1.0, v2.0, and v5.3. It is recommended to use v5.3, which is the latest stable version of DM. + +Currently, the DM documentation is independent of the TiDB documentation. To access the DM documentation, click one of the following links: + +- [DM v1.0 documentation](https://docs.pingcap.com/tidb-data-migration/v1.0/) +- [DM v2.0 documentation](https://docs.pingcap.com/tidb-data-migration/v2.0/) +- [DM v5.3 documentation](https://docs.pingcap.com/tidb-data-migration/stable) + +> **Note:** +> +> - Since October 2021, DM's GitHub repository has been moved to [pingcap/ticdc](https://github.com/pingcap/ticdc/tree/master/dm). If you see any issues with DM, submit your issue to the `pingcap/ticdc` repository for feedback. +> - In earlier versions (v1.0 and v2.0), DM uses version numbers that are independent of TiDB. Since v5.3, DM uses the same version number as TiDB. The next version of DM v2.0 is DM v5.3. There are no compatibility changes from DM v2.0 to v5.3, and the upgrade process is no different from a normal upgrade, only an increase in version number. + +## Basic features + +This section describes the basic data migration features provided by DM. + +![DM Core Features](/media/dm-core-features.png) + +### Block and allow lists migration at the schema and table levels + +The [block and allow lists filtering rule](key-features.md#block-and-allow-table-lists) is similar to the `replication-rules-db`/`replication-rules-table` feature of MySQL, which can be used to filter or replicate all operations of some databases only or some tables only. + +### Binlog event filtering + +The [binlog event filtering](key-features.md#binlog-event-filter) feature means that DM can filter certain types of SQL statements from certain tables in the source database. For example, you can filter all `INSERT` statements in the table `test`.`sbtest` or filter all `TRUNCATE TABLE` statements in the schema `test`. + +### Schema and table routing + +The [schema and table routing](key-features.md#table-routing) feature means that DM can migrate a certain table of the source database to the specified table in the downstream. For example, you can migrate the table structure and data from the table `test`.`sbtest1` in the source database to the table `test`.`sbtest2` in TiDB. This is also a core feature for merging and migrating sharded databases and tables. + +## Advanced features + +### Shard merge and migration + +DM supports merging and migrating the original sharded instances and tables from the source databases into TiDB, but with some restrictions. For details, see [Sharding DDL usage restrictions in the pessimistic mode](feature-shard-merge-pessimistic.md#restrictions) and [Sharding DDL usage restrictions in the optimistic mode](feature-shard-merge-optimistic.md#restrictions). + +### Optimization for third-party online-schema-change tools in the migration process + +In the MySQL ecosystem, tools such as gh-ost and pt-osc are widely used. DM provides support for these tools to avoid migrating unnecessary intermediate data. For details, see [Online DDL Tools](key-features.md#online-ddl-tools) + +### Filter certain row changes using SQL expressions + +In the phase of incremental replication, DM supports the configuration of SQL expressions to filter out certain row changes, which lets you replicate the data with a greater granularity. For more information, refer to [Filter Certain Row Changes Using SQL Expressions](feature-expression-filter.md). + +## Usage restrictions + +Before using the DM tool, note the following restrictions: + ++ Database version requirements + + - MySQL version > 5.5 + - MariaDB version >= 10.1.2 + + > **Note:** + > + > If there is a primary-secondary migration structure between the upstream MySQL/MariaDB servers, then choose the following version. + > + > - MySQL version > 5.7.1 + > - MariaDB version >= 10.1.3 + + > **Warning:** + > + > Support for MySQL 8.0 is an experimental feature of TiDB Data Migration v2.0. It is **NOT** recommended that you use it in a production environment. + ++ DDL syntax compatibility + + - Currently, TiDB is not compatible with all the DDL statements that MySQL supports. Because DM uses the TiDB parser to process DDL statements, it only supports the DDL syntax supported by the TiDB parser. For details, see [MySQL Compatibility](https://pingcap.com/docs/stable/reference/mysql-compatibility/#ddl). + + - DM reports an error when it encounters an incompatible DDL statement. To solve this error, you need to manually handle it using dmctl, either skipping this DDL statement or replacing it with a specified DDL statement(s). For details, see [Skip or replace abnormal SQL statements](faq.md#how-to-handle-incompatible-ddl-statements). + ++ Sharding merge with conflicts + + - If conflict exists between sharded tables, solve the conflict by referring to [handling conflicts of auto-increment primary key](shard-merge-best-practices.md#handle-conflicts-of-auto-increment-primary-key). Otherwise, data migration is not supported. Conflicting data can cover each other and cause data loss. + + - For other sharding DDL migration restrictions, see [Sharding DDL usage restrictions in the pessimistic mode](feature-shard-merge-pessimistic.md#restrictions) and [Sharding DDL usage restrictions in the optimistic mode](feature-shard-merge-optimistic.md#restrictions). + ++ Switch of MySQL instances for data sources + + When DM-worker connects the upstream MySQL instance via a virtual IP (VIP), if you switch the VIP connection to another MySQL instance, DM might connect to the new and old MySQL instances at the same time in different connections. In this situation, the binlog migrated to DM is not consistent with other upstream status that DM receives, causing unpredictable anomalies and even data damage. 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2021 19:59:04 +0800 Subject: [PATCH 02/12] Update dm-overview.md --- dm/dm-overview.md | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/dm/dm-overview.md b/dm/dm-overview.md index e331aa3d094af..a2a7d96a3af1e 100644 --- a/dm/dm-overview.md +++ b/dm/dm-overview.md @@ -30,29 +30,29 @@ This section describes the basic data migration features provided by DM. ### Block and allow lists migration at the schema and table levels -The [block and allow lists filtering rule](key-features.md#block-and-allow-table-lists) is similar to the `replication-rules-db`/`replication-rules-table` feature of MySQL, which can be used to filter or replicate all operations of some databases only or some tables only. +The [block and allow lists filtering rule](https://docs.pingcap.com/tidb-data-migration/stable/key-features#block-and-allow-table-lists) is similar to the `replication-rules-db`/`replication-rules-table` feature of MySQL, which can be used to filter or replicate all operations of some databases only or some tables only. ### Binlog event filtering -The [binlog event filtering](key-features.md#binlog-event-filter) feature means that DM can filter certain types of SQL statements from certain tables in the source database. For example, you can filter all `INSERT` statements in the table `test`.`sbtest` or filter all `TRUNCATE TABLE` statements in the schema `test`. +The [binlog event filtering](https://docs.pingcap.com/tidb-data-migration/stable/key-features#binlog-event-filter) feature means that DM can filter certain types of SQL statements from certain tables in the source database. For example, you can filter all `INSERT` statements in the table `test`.`sbtest` or filter all `TRUNCATE TABLE` statements in the schema `test`. ### Schema and table routing -The [schema and table routing](key-features.md#table-routing) feature means that DM can migrate a certain table of the source database to the specified table in the downstream. For example, you can migrate the table structure and data from the table `test`.`sbtest1` in the source database to the table `test`.`sbtest2` in TiDB. This is also a core feature for merging and migrating sharded databases and tables. +The [schema and table routing](https://docs.pingcap.com/tidb-data-migration/stable/key-features#table-routing) feature means that DM can migrate a certain table of the source database to the specified table in the downstream. For example, you can migrate the table structure and data from the table `test`.`sbtest1` in the source database to the table `test`.`sbtest2` in TiDB. This is also a core feature for merging and migrating sharded databases and tables. ## Advanced features ### Shard merge and migration -DM supports merging and migrating the original sharded instances and tables from the source databases into TiDB, but with some restrictions. For details, see [Sharding DDL usage restrictions in the pessimistic mode](feature-shard-merge-pessimistic.md#restrictions) and [Sharding DDL usage restrictions in the optimistic mode](feature-shard-merge-optimistic.md#restrictions). +DM supports merging and migrating the original sharded instances and tables from the source databases into TiDB, but with some restrictions. For details, see [Sharding DDL usage restrictions in the pessimistic mode](https://docs.pingcap.com/tidb-data-migration/stable/feature-shard-merge-pessimistic#restrictions) and [Sharding DDL usage restrictions in the optimistic mode](https://docs.pingcap.com/tidb-data-migration/stable/feature-shard-merge-optimistic#restrictions). ### Optimization for third-party online-schema-change tools in the migration process -In the MySQL ecosystem, tools such as gh-ost and pt-osc are widely used. DM provides support for these tools to avoid migrating unnecessary intermediate data. For details, see [Online DDL Tools](key-features.md#online-ddl-tools) +In the MySQL ecosystem, tools such as gh-ost and pt-osc are widely used. DM provides support for these tools to avoid migrating unnecessary intermediate data. For details, see [Online DDL Tools](https://docs.pingcap.com/tidb-data-migration/stable/key-features#online-ddl-tools) ### Filter certain row changes using SQL expressions -In the phase of incremental replication, DM supports the configuration of SQL expressions to filter out certain row changes, which lets you replicate the data with a greater granularity. For more information, refer to [Filter Certain Row Changes Using SQL Expressions](feature-expression-filter.md). +In the phase of incremental replication, DM supports the configuration of SQL expressions to filter out certain row changes, which lets you replicate the data with a greater granularity. For more information, refer to [Filter Certain Row Changes Using SQL Expressions](https://docs.pingcap.com/tidb-data-migration/stable/feature-expression-filter). ## Usage restrictions @@ -76,16 +76,16 @@ Before using the DM tool, note the following restrictions: + DDL syntax compatibility - - Currently, TiDB is not compatible with all the DDL statements that MySQL supports. Because DM uses the TiDB parser to process DDL statements, it only supports the DDL syntax supported by the TiDB parser. For details, see [MySQL Compatibility](https://pingcap.com/docs/stable/reference/mysql-compatibility/#ddl). + - Currently, TiDB is not compatible with all the DDL statements that MySQL supports. Because DM uses the TiDB parser to process DDL statements, it only supports the DDL syntax supported by the TiDB parser. For details, see [MySQL Compatibility](/reference/mysql-compatibility/#ddl). - - DM reports an error when it encounters an incompatible DDL statement. To solve this error, you need to manually handle it using dmctl, either skipping this DDL statement or replacing it with a specified DDL statement(s). For details, see [Skip or replace abnormal SQL statements](faq.md#how-to-handle-incompatible-ddl-statements). + - DM reports an error when it encounters an incompatible DDL statement. To solve this error, you need to manually handle it using dmctl, either skipping this DDL statement or replacing it with a specified DDL statement(s). For details, see [Skip or replace abnormal SQL statements](https://docs.pingcap.com/tidb-data-migration/stable/faq#how-to-handle-incompatible-ddl-statements). + Sharding merge with conflicts - - If conflict exists between sharded tables, solve the conflict by referring to [handling conflicts of auto-increment primary key](shard-merge-best-practices.md#handle-conflicts-of-auto-increment-primary-key). Otherwise, data migration is not supported. Conflicting data can cover each other and cause data loss. + - If conflict exists between sharded tables, solve the conflict by referring to [handling conflicts of auto-increment primary key](https://docs.pingcap.com/tidb-data-migration/stable/shard-merge-best-practices#handle-conflicts-of-auto-increment-primary-key). Otherwise, data migration is not supported. Conflicting data can cover each other and cause data loss. - - For other sharding DDL migration restrictions, see [Sharding DDL usage restrictions in the pessimistic mode](feature-shard-merge-pessimistic.md#restrictions) and [Sharding DDL usage restrictions in the optimistic mode](feature-shard-merge-optimistic.md#restrictions). + - For other sharding DDL migration restrictions, see [Sharding DDL usage restrictions in the pessimistic mode](https://docs.pingcap.com/tidb-data-migration/stable/feature-shard-merge-pessimistic#restrictions) and [Sharding DDL usage restrictions in the optimistic mode](https://docs.pingcap.com/tidb-data-migration/stable/feature-shard-merge-optimistic#restrictions). + Switch of MySQL instances for data sources - When DM-worker connects the upstream MySQL instance via a virtual IP (VIP), if you switch the VIP connection to another MySQL instance, DM might connect to the new and old MySQL instances at the same time in different connections. In this situation, the binlog migrated to DM is not consistent with other upstream status that DM receives, causing unpredictable anomalies and even data damage. To make necessary changes to DM manually, see [Switch DM-worker connection via virtual IP](usage-scenario-master-slave-switch.md#switch-dm-worker-connection-via-virtual-ip). + When DM-worker connects the upstream MySQL instance via a virtual IP (VIP), if you switch the VIP connection to another MySQL instance, DM might connect to the new and old MySQL instances at the same time in different connections. In this situation, the binlog migrated to DM is not consistent with other upstream status that DM receives, causing unpredictable anomalies and even data damage. To make necessary changes to DM manually, see [Switch DM-worker connection via virtual IP](https://docs.pingcap.com/tidb-data-migration/stable/usage-scenario-master-slave-switch#switch-dm-worker-connection-via-virtual-ip). From 75225e83de0c0895a3bb75c338987ed9ae4375bb Mon Sep 17 00:00:00 2001 From: qiancai Date: Fri, 10 Dec 2021 10:04:22 +0800 Subject: [PATCH 03/12] fix_dead_links --- dm/dm-overview.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/dm/dm-overview.md b/dm/dm-overview.md index a2a7d96a3af1e..4b280c28fe083 100644 --- a/dm/dm-overview.md +++ b/dm/dm-overview.md @@ -26,7 +26,7 @@ Currently, the DM documentation is independent of the TiDB documentation. To acc This section describes the basic data migration features provided by DM. -![DM Core Features](/media/dm-core-features.png) +![DM Core Features](/media/dm/dm-core-features.png) ### Block and allow lists migration at the schema and table levels @@ -76,7 +76,7 @@ Before using the DM tool, note the following restrictions: + DDL syntax compatibility - - Currently, TiDB is not compatible with all the DDL statements that MySQL supports. Because DM uses the TiDB parser to process DDL statements, it only supports the DDL syntax supported by the TiDB parser. For details, see [MySQL Compatibility](/reference/mysql-compatibility/#ddl). + - Currently, TiDB is not compatible with all the DDL statements that MySQL supports. Because DM uses the TiDB parser to process DDL statements, it only supports the DDL syntax supported by the TiDB parser. For details, see [MySQL Compatibility](mysql-compatibility/#ddl). - DM reports an error when it encounters an incompatible DDL statement. To solve this error, you need to manually handle it using dmctl, either skipping this DDL statement or replacing it with a specified DDL statement(s). For details, see [Skip or replace abnormal SQL statements](https://docs.pingcap.com/tidb-data-migration/stable/faq#how-to-handle-incompatible-ddl-statements). From c8d358b36c5f48dc75d2b84ccbb7faebb6e76142 Mon Sep 17 00:00:00 2001 From: qiancai Date: Fri, 10 Dec 2021 11:44:26 +0800 Subject: [PATCH 04/12] update_version --- dm/dm-overview.md | 6 +++--- tidb-in-kubernetes.md | 8 ++++---- 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/dm/dm-overview.md b/dm/dm-overview.md index 4b280c28fe083..e566a4f2b4408 100644 --- a/dm/dm-overview.md +++ b/dm/dm-overview.md @@ -5,7 +5,7 @@ summary: Learn about the TiDB Data Migration tool # TiDB Data Migration -[TiDB Data Migration](https://github.com/pingcap/dm) (DM) is an integrated data migration task management platform, which supports the full data migration and the incremental data replication from MySQL-compatible databases (such as MySQL, MariaDB, and Aurora MySQL) into TiDB. It can help to reduce the operation cost of data migration and simplify the troubleshooting process. +[TiDB Data Migration](https://github.com/pingcap/dm) (DM) is an integrated data migration task management platform, which supports the full data migration and the incremental data replication from MySQL-compatible databases (such as MySQL, MariaDB, and Aurora MySQL) into TiDB. DM can help simplify the data migration process and reduce the operation cost of data migration. ## DM versions @@ -13,9 +13,9 @@ The stable versions of DM include v1.0, v2.0, and v5.3. It is recommended to use Currently, the DM documentation is independent of the TiDB documentation. To access the DM documentation, click one of the following links: -- [DM v1.0 documentation](https://docs.pingcap.com/tidb-data-migration/v1.0/) +- [DM v5.3 documentation](https://docs.pingcap.com/tidb-data-migration/v5.3) - [DM v2.0 documentation](https://docs.pingcap.com/tidb-data-migration/v2.0/) -- [DM v5.3 documentation](https://docs.pingcap.com/tidb-data-migration/stable) +- [DM v1.0 documentation](https://docs.pingcap.com/tidb-data-migration/v1.0/) > **Note:** > diff --git a/tidb-in-kubernetes.md b/tidb-in-kubernetes.md index d1dc1b216c1c6..643e2a558a9e5 100644 --- a/tidb-in-kubernetes.md +++ b/tidb-in-kubernetes.md @@ -8,10 +8,10 @@ aliases: ['/docs/tidb-in-kubernetes/dev/'] You can use [TiDB Operator](https://github.com/pingcap/tidb-operator) to deploy TiDB clusters in Kubernetes. TiDB Operator is an automatic operation system for TiDB clusters in Kubernetes. It provides a full management life-cycle for TiDB including deployment, upgrades, scaling, backup, fail-over, and configuration changes. With TiDB Operator, TiDB can run seamlessly in the Kubernetes clusters deployed on a public or private cloud. -For the current TiDB release, the available versions of TiDB Operator include v1.0, v1.1, and v1.2. It is recommended to use v1.2, which is the latest stable version of TiDB Operator. +For the current TiDB release, the available versions of TiDB Operator include v1.2, v1.1, and v1.0. It is recommended to use v1.2, which is the latest stable version of TiDB Operator. Currently, the TiDB Operator documentation is independent of the TiDB documentation. For detailed steps on how to deploy TiDB clusters in Kubernetes using TiDB Operator, see the corresponding TiDB Operator documentation in the following links: -- [TiDB Operator v1.0 documentation](https://docs.pingcap.com/tidb-data-migration/v1.0/) -- [TiDB Operator v1.1 documentation](https://docs.pingcap.com/tidb-data-migration/v2.0/) -- [TiDB Operator v1.2 documentation](https://docs.pingcap.com/tidb-data-migration/stable) \ No newline at end of file +- [TiDB Operator v1.2 documentation](https://docs.pingcap.com/zh/tidb-in-kubernetes/v1.2/) +- [TiDB Operator v1.1 documentation](https://docs.pingcap.com/zh/tidb-in-kubernetes/v1.1/) +- [TiDB Operator v1.0 documentation](https://docs.pingcap.com/zh/tidb-in-kubernetes/v1.0/) \ No newline at end of file From 2e479a98b90592ad18444b6a812cf2d071bd158c Mon Sep 17 00:00:00 2001 From: qiancai Date: Fri, 10 Dec 2021 19:13:55 +0800 Subject: [PATCH 05/12] Update dm-overview.md --- dm/dm-overview.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/dm/dm-overview.md b/dm/dm-overview.md index e566a4f2b4408..84181b3e6c1b0 100644 --- a/dm/dm-overview.md +++ b/dm/dm-overview.md @@ -9,7 +9,7 @@ summary: Learn about the TiDB Data Migration tool ## DM versions -The stable versions of DM include v1.0, v2.0, and v5.3. It is recommended to use v5.3, which is the latest stable version of DM. +The stable versions of DM include v1.0, v2.0, and v5.3. It is recommended to use DM v5.3 (the latest stable version of DM) and not recommended to use v1.0 (the oldest version of DM). Currently, the DM documentation is independent of the TiDB documentation. To access the DM documentation, click one of the following links: From b4e71b378b0e6116db68989abbba98ab3c7685d1 Mon Sep 17 00:00:00 2001 From: qiancai Date: Fri, 10 Dec 2021 19:32:19 +0800 Subject: [PATCH 06/12] apply comments --- dm/dm-overview.md | 2 +- tidb-in-kubernetes.md | 8 ++------ 2 files changed, 3 insertions(+), 7 deletions(-) diff --git a/dm/dm-overview.md b/dm/dm-overview.md index 84181b3e6c1b0..34a3de3bc58cd 100644 --- a/dm/dm-overview.md +++ b/dm/dm-overview.md @@ -72,7 +72,7 @@ Before using the DM tool, note the following restrictions: > **Warning:** > - > Support for MySQL 8.0 is an experimental feature of TiDB Data Migration v2.0. It is **NOT** recommended that you use it in a production environment. + > Migrating data from MySQL 8.0 to TiDB using DM is an experimental feature (introduced since DM v2.0). It is **NOT** recommended that you use it in a production environment. + DDL syntax compatibility diff --git a/tidb-in-kubernetes.md b/tidb-in-kubernetes.md index 643e2a558a9e5..12bfec6cf5b97 100644 --- a/tidb-in-kubernetes.md +++ b/tidb-in-kubernetes.md @@ -8,10 +8,6 @@ aliases: ['/docs/tidb-in-kubernetes/dev/'] You can use [TiDB Operator](https://github.com/pingcap/tidb-operator) to deploy TiDB clusters in Kubernetes. TiDB Operator is an automatic operation system for TiDB clusters in Kubernetes. It provides a full management life-cycle for TiDB including deployment, upgrades, scaling, backup, fail-over, and configuration changes. With TiDB Operator, TiDB can run seamlessly in the Kubernetes clusters deployed on a public or private cloud. -For the current TiDB release, the available versions of TiDB Operator include v1.2, v1.1, and v1.0. It is recommended to use v1.2, which is the latest stable version of TiDB Operator. +For the current TiDB release, the compatible version of TiDB Operator is v1.2. -Currently, the TiDB Operator documentation is independent of the TiDB documentation. For detailed steps on how to deploy TiDB clusters in Kubernetes using TiDB Operator, see the corresponding TiDB Operator documentation in the following links: - -- [TiDB Operator v1.2 documentation](https://docs.pingcap.com/zh/tidb-in-kubernetes/v1.2/) -- [TiDB Operator v1.1 documentation](https://docs.pingcap.com/zh/tidb-in-kubernetes/v1.1/) -- [TiDB Operator v1.0 documentation](https://docs.pingcap.com/zh/tidb-in-kubernetes/v1.0/) \ No newline at end of file +Currently, the TiDB in Kubernetes documentation is independent of the TiDB documentation. For detailed steps on how to deploy TiDB clusters in Kubernetes using TiDB Operator, see [TiDB in Kubernetes documentation](https://docs.pingcap.com/zh/tidb-in-kubernetes/v1.2/). \ No newline at end of file From 0e2a262a3bcfe422d2b54b1f2494275d9b44167c Mon Sep 17 00:00:00 2001 From: qiancai Date: Mon, 13 Dec 2021 10:48:14 +0800 Subject: [PATCH 07/12] Update dm-overview.md --- dm/dm-overview.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/dm/dm-overview.md b/dm/dm-overview.md index 34a3de3bc58cd..28d4bf84b9ac5 100644 --- a/dm/dm-overview.md +++ b/dm/dm-overview.md @@ -76,7 +76,7 @@ Before using the DM tool, note the following restrictions: + DDL syntax compatibility - - Currently, TiDB is not compatible with all the DDL statements that MySQL supports. Because DM uses the TiDB parser to process DDL statements, it only supports the DDL syntax supported by the TiDB parser. For details, see [MySQL Compatibility](mysql-compatibility/#ddl). + - Currently, TiDB is not compatible with all the DDL statements that MySQL supports. Because DM uses the TiDB parser to process DDL statements, it only supports the DDL syntax supported by the TiDB parser. For details, see [MySQL Compatibility](/mysql-compatibility/#ddl). - DM reports an error when it encounters an incompatible DDL statement. To solve this error, you need to manually handle it using dmctl, either skipping this DDL statement or replacing it with a specified DDL statement(s). For details, see [Skip or replace abnormal SQL statements](https://docs.pingcap.com/tidb-data-migration/stable/faq#how-to-handle-incompatible-ddl-statements). From 14a4941dfef5f23e38b714bded588c4c32049019 Mon Sep 17 00:00:00 2001 From: qiancai Date: Mon, 13 Dec 2021 11:20:20 +0800 Subject: [PATCH 08/12] Update dm-overview.md --- dm/dm-overview.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/dm/dm-overview.md b/dm/dm-overview.md index 28d4bf84b9ac5..e08c46db733d7 100644 --- a/dm/dm-overview.md +++ b/dm/dm-overview.md @@ -76,7 +76,7 @@ Before using the DM tool, note the following restrictions: + DDL syntax compatibility - - Currently, TiDB is not compatible with all the DDL statements that MySQL supports. Because DM uses the TiDB parser to process DDL statements, it only supports the DDL syntax supported by the TiDB parser. For details, see [MySQL Compatibility](/mysql-compatibility/#ddl). + - Currently, TiDB is not compatible with all the DDL statements that MySQL supports. Because DM uses the TiDB parser to process DDL statements, it only supports the DDL syntax supported by the TiDB parser. For details, see [MySQL Compatibility](/mysql-compatibility.md#ddl). - DM reports an error when it encounters an incompatible DDL statement. To solve this error, you need to manually handle it using dmctl, either skipping this DDL statement or replacing it with a specified DDL statement(s). For details, see [Skip or replace abnormal SQL statements](https://docs.pingcap.com/tidb-data-migration/stable/faq#how-to-handle-incompatible-ddl-statements). From 38480fda43c4478979c9a0b888d90fa9ad15c761 Mon Sep 17 00:00:00 2001 From: qiancai Date: Mon, 13 Dec 2021 18:53:12 +0800 Subject: [PATCH 09/12] fix_link_error --- dm/dm-overview.md | 2 +- tidb-in-kubernetes.md | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/dm/dm-overview.md b/dm/dm-overview.md index e08c46db733d7..06436f34e2d06 100644 --- a/dm/dm-overview.md +++ b/dm/dm-overview.md @@ -9,7 +9,7 @@ summary: Learn about the TiDB Data Migration tool ## DM versions -The stable versions of DM include v1.0, v2.0, and v5.3. It is recommended to use DM v5.3 (the latest stable version of DM) and not recommended to use v1.0 (the oldest version of DM). +The stable versions of DM include v1.0, v2.0, and v5.3. It is recommended to use DM v5.3 (the latest stable version of DM) and not recommended to use v1.0 (the earliest stable version of DM). Currently, the DM documentation is independent of the TiDB documentation. To access the DM documentation, click one of the following links: diff --git a/tidb-in-kubernetes.md b/tidb-in-kubernetes.md index 12bfec6cf5b97..0723cd0c37fcb 100644 --- a/tidb-in-kubernetes.md +++ b/tidb-in-kubernetes.md @@ -10,4 +10,4 @@ You can use [TiDB Operator](https://github.com/pingcap/tidb-operator) to deploy For the current TiDB release, the compatible version of TiDB Operator is v1.2. -Currently, the TiDB in Kubernetes documentation is independent of the TiDB documentation. For detailed steps on how to deploy TiDB clusters in Kubernetes using TiDB Operator, see [TiDB in Kubernetes documentation](https://docs.pingcap.com/zh/tidb-in-kubernetes/v1.2/). \ No newline at end of file +Currently, the TiDB in Kubernetes documentation is independent of the TiDB documentation. For detailed steps on how to deploy TiDB clusters in Kubernetes using TiDB Operator, see [TiDB in Kubernetes documentation](https://docs.pingcap.com/tidb-in-kubernetes/v1.2/). \ No newline at end of file From 325328090fa9ff5447e91df94771582105ac8d86 Mon Sep 17 00:00:00 2001 From: Grace Cai Date: Tue, 14 Dec 2021 09:35:08 +0800 Subject: [PATCH 10/12] Update tidb-in-kubernetes.md Co-authored-by: DanielZhangQD <36026334+DanielZhangQD@users.noreply.github.com> --- tidb-in-kubernetes.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tidb-in-kubernetes.md b/tidb-in-kubernetes.md index 0723cd0c37fcb..73b0c2a1b388e 100644 --- a/tidb-in-kubernetes.md +++ b/tidb-in-kubernetes.md @@ -6,7 +6,7 @@ aliases: ['/docs/tidb-in-kubernetes/dev/'] # Deploy a TiDB Cluster in Kubernetes -You can use [TiDB Operator](https://github.com/pingcap/tidb-operator) to deploy TiDB clusters in Kubernetes. TiDB Operator is an automatic operation system for TiDB clusters in Kubernetes. It provides a full management life-cycle for TiDB including deployment, upgrades, scaling, backup, fail-over, and configuration changes. With TiDB Operator, TiDB can run seamlessly in the Kubernetes clusters deployed on a public or private cloud. +You can use [TiDB Operator](https://github.com/pingcap/tidb-operator) to deploy TiDB clusters in Kubernetes. TiDB Operator is an automatic operation system for TiDB clusters in Kubernetes. It provides full life-cycle management for TiDB including deployment, upgrades, scaling, backup, fail-over, and configuration changes. With TiDB Operator, TiDB can run seamlessly in the Kubernetes clusters deployed on a public or private cloud. For the current TiDB release, the compatible version of TiDB Operator is v1.2. From 0bb9543f51337583b67cbe5797c9b9f6faf10331 Mon Sep 17 00:00:00 2001 From: Grace Cai Date: Wed, 15 Dec 2021 13:35:56 +0800 Subject: [PATCH 11/12] Apply suggestions from code review Co-authored-by: sunzy --- dm/dm-overview.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/dm/dm-overview.md b/dm/dm-overview.md index 06436f34e2d06..c991446c170bd 100644 --- a/dm/dm-overview.md +++ b/dm/dm-overview.md @@ -48,7 +48,7 @@ DM supports merging and migrating the original sharded instances and tables from ### Optimization for third-party online-schema-change tools in the migration process -In the MySQL ecosystem, tools such as gh-ost and pt-osc are widely used. DM provides support for these tools to avoid migrating unnecessary intermediate data. For details, see [Online DDL Tools](https://docs.pingcap.com/tidb-data-migration/stable/key-features#online-ddl-tools) +In the MySQL ecosystem, tools such as `gh-ost` and `pt-osc` are widely used. DM provides support for these tools to avoid migrating unnecessary intermediate data. For details, see [Online DDL Tools](https://docs.pingcap.com/tidb-data-migration/stable/key-features#online-ddl-tools) ### Filter certain row changes using SQL expressions From 7d6e6c40f6a830518926ca44e20db062f3c27a16 Mon Sep 17 00:00:00 2001 From: Grace Cai Date: Wed, 15 Dec 2021 15:03:12 +0800 Subject: [PATCH 12/12] Apply suggestions from code review Co-authored-by: Lilian Lee --- dm/dm-overview.md | 2 +- tidb-in-kubernetes.md | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/dm/dm-overview.md b/dm/dm-overview.md index c991446c170bd..5335e799d824c 100644 --- a/dm/dm-overview.md +++ b/dm/dm-overview.md @@ -1,6 +1,6 @@ --- title: TiDB Data Migration -summary: Learn about the TiDB Data Migration tool +summary: Learn about the TiDB Data Migration tool. --- # TiDB Data Migration diff --git a/tidb-in-kubernetes.md b/tidb-in-kubernetes.md index 73b0c2a1b388e..e2bf57fbf27bf 100644 --- a/tidb-in-kubernetes.md +++ b/tidb-in-kubernetes.md @@ -1,6 +1,6 @@ --- -title: Deploy in Kubernetes -summary: Learn how to deploy TiDB in Kubernetes +title: Deploy a TiDB Cluster in Kubernetes +summary: Learn how to deploy a TiDB cluster in Kubernetes. aliases: ['/docs/tidb-in-kubernetes/dev/'] ---