Skip to content

pd: complement pd section (#21204) #21211

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 1 commit into
base: release-7.5
Choose a base branch
from

Conversation

ti-chi-bot
Copy link
Member

This is an automated cherry-pick of #21204

First-time contributors' checklist

What is changed, added or deleted? (Required)

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 (in Chinese).

  • master (the latest development version)
  • v9.0 (TiDB 9.0 versions)
  • v8.5 (TiDB 8.5 versions)
  • v8.4 (TiDB 8.4 versions)
  • v8.3 (TiDB 8.3 versions)
  • v8.1 (TiDB 8.1 versions)
  • v7.5 (TiDB 7.5 versions)
  • v7.1 (TiDB 7.1 versions)
  • v6.5 (TiDB 6.5 versions)
  • v6.1 (TiDB 6.1 versions)
  • v5.4 (TiDB 5.4 versions)

What is the related PR or file link(s)?

Do your changes match any of the following descriptions?

  • Delete files
  • Change aliases
  • Need modification after applied to another branch
  • Might cause conflicts after applied to another branch

@ti-chi-bot ti-chi-bot added do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. lgtm size/M Denotes a PR that changes 30-99 lines, ignoring generated files. type/cherry-pick-for-release-7.5 This PR is cherry-picked to release-7.5 from a source PR. labels Jun 20, 2025
@ti-chi-bot ti-chi-bot mentioned this pull request Jun 20, 2025
16 tasks
@ti-chi-bot
Copy link
Member Author

@qiancai This PR has conflicts, I have hold it.
Please resolve them or ask others to resolve them, then comment /unhold to remove the hold label.

Copy link

ti-chi-bot bot commented Jun 20, 2025

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign qiancai for approval. For more information see the Code Review Process.
Please ensure that each of them provides their approval before proceeding.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

Copy link

@gemini-code-assist gemini-code-assist bot left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Summary of Changes

Hello @ti-chi-bot, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request primarily focuses on enhancing the documentation for TiDB's Placement Driver (PD) configuration. It introduces a substantial number of new dynamic configuration parameters and provides more detailed explanations for specific settings, aiming to offer a more complete and up-to-date reference for users managing TiDB clusters.

Highlights

  • Updated Parameter Descriptions: Refined the description for an existing parameter (schedule.patrol-region-interval) for improved clarity and consistency.
  • Detailed Configuration Documentation: Included a new detailed section for the max-movable-hot-peer-size parameter in the PD configuration file, providing its purpose, default value, and unit, and marking it as 'New in v6.1.0'.
Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.

Feature Command Description
Code Review /gemini review Performs a code review for the current pull request in its current state.
Pull Request Summary /gemini summary Provides a summary of the current pull request in its current state.
Comment @gemini-code-assist Responds in comments when explicitly tagged, both in issue comments and review comments.
Help /gemini help Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist is currently in preview and may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments to provide feedback.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

  1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution.

Copy link

@gemini-code-assist gemini-code-assist bot left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Code Review

This pull request updates the PD documentation by adding new configuration parameters to dynamic-config.md and pd-configuration-file.md. A critical merge conflict has been identified in dynamic-config.md which needs immediate attention. Other minor suggestions focus on improving punctuation, clarity, and adherence to formatting guidelines for better readability and consistency.

Comment on lines +269 to +273
<<<<<<< HEAD
| `schedule.patrol-region-interval` | Determines the frequency at which `replicaChecker` checks the health state of a Region |
=======
| `schedule.patrol-region-interval` | Determines the frequency at which the checker inspects the health state of a Region |
>>>>>>> 885805fa1a (pd: complement pd section (#21204))

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

critical

This section contains merge conflict markers (<<<<<<< HEAD, =======, >>>>>>>) that need to be resolved. Please remove these markers and ensure the correct version of the content for schedule.patrol-region-interval is present.

Suggested change
<<<<<<< HEAD
| `schedule.patrol-region-interval` | Determines the frequency at which `replicaChecker` checks the health state of a Region |
=======
| `schedule.patrol-region-interval` | Determines the frequency at which the checker inspects the health state of a Region |
>>>>>>> 885805fa1a (pd: complement pd section (#21204))
| `schedule.patrol-region-interval` | Determines the frequency at which the checker inspects the health state of a Region |

| `schedule.enable-joint-consensus` | Controls whether to use Joint Consensus for replica scheduling |
| `schedule.hot-regions-write-interval` | The time interval at which PD stores hot Region information |
| `schedule.hot-regions-reserved-days` | Specifies how many days the hot Region information is retained |
| `schedule.max-movable-hot-peer-size` | Controls the maximum Region size that can be scheduled for hot Region scheduling. |

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

low

The description for schedule.max-movable-hot-peer-size ends with an unnecessary period. For consistency with other descriptions in this table, please remove it.1

Style Guide References

Suggested change
| `schedule.max-movable-hot-peer-size` | Controls the maximum Region size that can be scheduled for hot Region scheduling. |
| `schedule.max-movable-hot-peer-size` | Controls the maximum Region size that can be scheduled for hot Region scheduling |

Footnotes

  1. Style guide emphasizes correct punctuation. Extraneous periods should be removed for consistency. (link)

| `pd-server.use-region-storage` | Enables independent Region storage |
| `pd-server.max-gap-reset-ts` | Sets the maximum interval of resetting timestamp (BR) |
| `pd-server.key-type` | Sets the cluster key type |
| `pd-server.metric-storage` | Sets the storage address of the cluster metrics |
| `pd-server.dashboard-address` | Sets the dashboard address |
| `pd-server.flow-round-by-digit` | Specifies the number of lowest digits to round for the Region flow information |
| `pd-server.min-resolved-ts-persistence-interval` | Determines the interval at which the minimum resolved timestamp is persistent to the PD |

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

low

The phrase "is persistent to the PD" could be slightly rephrased for better clarity.1 Consider "is persisted in PD" or "is persisted to PD".

Style Guide References

Suggested change
| `pd-server.min-resolved-ts-persistence-interval` | Determines the interval at which the minimum resolved timestamp is persistent to the PD |
| `pd-server.min-resolved-ts-persistence-interval` | Determines the interval at which the minimum resolved timestamp is persisted in PD |

Footnotes

  1. Documentation should be clear and easy to understand. (link)

| `replication-mode.replication-mode` | Sets the backup mode |
| `replication-mode.dr-auto-sync.label-key` | Distinguishes different AZs and needs to match Placement Rules |

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

low

The phrase "and needs to match Placement Rules" could be made more direct for clarity.1 Suggestion: "and must match Placement Rules".

Style Guide References

Suggested change
| `replication-mode.dr-auto-sync.label-key` | Distinguishes different AZs and needs to match Placement Rules |
| `replication-mode.dr-auto-sync.label-key` | Distinguishes different AZs and must match Placement Rules |

Footnotes

  1. Documentation should be clear and simple. (link)

Copy link

ti-chi-bot bot commented Jun 20, 2025

@ti-chi-bot: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name Commit Details Required Rerun command
pull-verify 169d2e4 link true /test pull-verify

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. lgtm size/M Denotes a PR that changes 30-99 lines, ignoring generated files. type/cherry-pick-for-release-7.5 This PR is cherry-picked to release-7.5 from a source PR.
Projects
None yet
Development

Successfully merging this pull request may close these issues.

2 participants