Merge DM dev docs to TiDB dev docs #7317
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
|
[REVIEW NOTIFICATION] This pull request has been approved by:
To complete the pull request process, please ask the reviewers in the list to review by filling The full list of commands accepted by this bot can be found here. Reviewer can indicate their review by submitting an approval review. |
ti-chi-bot
added
missing-translation-status
qiancai
added
the
translation/from-docs-cn
ti-chi-bot
removed
the
missing-translation-status
TomShawn
reviewed
Dec 22, 2021
TomShawn
reviewed
Dec 22, 2021
TomShawn
reviewed
Dec 22, 2021
TomShawn
reviewed
Dec 22, 2021
TomShawn
reviewed
Dec 22, 2021
TomShawn
reviewed
Dec 22, 2021
TomShawn
reviewed
Dec 22, 2021
dm/dm-overview.md
Outdated
|
|
||
| ### Schema and table routing | ||
|
|
||
| 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. | ||
| The [schema and table routing]\dm\dm-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. |
TomShawn
reviewed
Dec 22, 2021
dm/dm-overview.md
Outdated
|
|
||
| ## 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](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). | ||
| 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]\dm\feature-shard-merge-pessimistic.md#restrictions) and [Sharding DDL usage restrictions in the optimistic mode]\dm\feature-shard-merge-optimistic.md#restrictions). |
TomShawn
reviewed
Dec 22, 2021
dm/dm-overview.md
Outdated
|
|
||
| ### 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]\dm\dm-key-features.md#online-ddl-tools) |
TomShawn
reviewed
Dec 22, 2021
dm/dm-overview.md
Outdated
|
|
||
| ### 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](https://docs.pingcap.com/tidb-data-migration/stable/feature-expression-filter). | ||
| 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]\dm\feature-expression-filter.md). |
TomShawn
reviewed
Dec 22, 2021
TomShawn
reviewed
Dec 22, 2021
dm/dm-overview.md
Outdated
|
|
||
| - 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). | ||
| - 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]\dm\dm-faq.md#how-to-handle-incompatible-ddl-statements). |
ti-chi-bot
added
status/LGT2
|
/merge |
|
This pull request has been accepted and is ready to merge. Commit hash: 0fa43e1
|
ti-chi-bot
added
the
status/can-merge
|
LGTM |
This was referenced Dec 23, 2021
4 tasks
8 tasks
8 tasks
7 tasks
7 tasks
4 tasks
8 tasks
This was referenced May 23, 2022
8 tasks
8 tasks
This was referenced Jun 20, 2022
This was referenced Jun 20, 2022
7 tasks
8 tasks
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
What is changed, added or deleted? (Required)
To help users access TiDB Data Migration (DM) documentation more quickly and conveniently, this PR merges TiDB DM dev docs into TiDB dev docs.
The major changes are as follows:
Which TiDB version(s) do your changes apply to? (Required)
Tips for choosing the affected version(s):
By default, CHOOSE MASTER ONLY so your changes will be applied to the next TiDB major or minor releases. If your PR involves a product feature behavior change or a compatibility change, CHOOSE THE AFFECTED RELEASE BRANCH(ES) AND MASTER.
For details, see tips for choosing the affected versions.
What is the related PR or file link(s)?
Do your changes match any of the following descriptions?