pd: complement pd section (#21204) #21215
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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 updating and complementing the TiDB documentation related to Placement Driver (PD) configuration. It aims to ensure that the documentation accurately reflects the available dynamic configuration parameters and provides comprehensive details for new and existing settings, thereby improving the clarity and completeness of the PD section.
Highlights
- Documentation Expansion: I've identified that this pull request significantly expands the documentation for dynamic PD (Placement Driver) configuration parameters, adding numerous new entries across various categories such as scheduling, replication, and PD server settings.
- New Configuration Parameters: Specifically, new dynamic configuration items like
schedule.max-store-preparing-time,schedule.region-score-formula-version, and a comprehensive set ofreplication-mode.dr-auto-syncparameters have been added to thedynamic-config.mdfile. - Parameter Detail Enhancement: The PR also includes more detailed documentation for specific parameters, such as
max-movable-hot-peer-sizeinpd-configuration-file.md, providing its default value and unit. - Clarity Improvements: A minor wording adjustment was made to the description of
schedule.patrol-region-intervalindynamic-config.mdfor improved clarity.
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Code Review
This pull request complements the PD documentation by adding several new dynamic configuration items to dynamic-config.md and providing details for max-movable-hot-peer-size in pd-configuration-file.md.
The most critical issue is a merge conflict in dynamic-config.md that needs to be resolved.
Additionally, I've provided a few minor suggestions to improve formatting consistency (such as using backticks for specific terms like status names and default numeric values) and to enhance clarity by rephrasing a description to use a more active voice, in line with the style guide. These changes will help maintain the high quality and readability of the documentation.
| <<<<<<< 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)) |
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This section contains merge conflict markers (<<<<<<< HEAD, =======, >>>>>>>). Please resolve this conflict before merging.
It appears the conflict is around the description for schedule.patrol-region-interval. The HEAD version uses replicaChecker while the incoming change uses the checker. For consistency with other parts of the documentation (e.g., pd-configuration-file.md line 280 and this file line 306's related config), using the specific term replicaChecker is recommended if it's the precise component name.
| | `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. | | ||
| | `schedule.store-limit-version` | Controls the version of [store limit](/configure-store-limit.md) | | ||
| | `schedule.patrol-region-worker-count` | Controls the number of concurrent operators created by the checker when inspecting the health state of a Region | |
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For consistency and technical accuracy, consider using replicaChecker instead of "the checker", similar to how it's used in pd-configuration-file.md (line 280) for related configurations.1
Additionally, replicaChecker should be enclosed in backticks as it's a specific component name.2
Style Guide References
| | `schedule.patrol-region-worker-count` | Controls the number of concurrent operators created by the checker when inspecting the health state of a Region | | |
| | `schedule.patrol-region-worker-count` | Controls the number of concurrent operators created by ``replicaChecker`` when inspecting the health state of a Region | |
Footnotes
| | `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 | |
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The phrase "is persistent to the PD" could be more concise and active. Consider rephrasing to "persists to PD" or "is persisted to PD". Using "persists to PD" aligns well with the preference for present tense.12
Style Guide References
| | `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 persists to PD | |
Footnotes
| | `replication-mode.dr-auto-sync.primary-replicas` | The number of Voter replicas in the primary AZ | | ||
| | `replication-mode.dr-auto-sync.dr-replicas` | The number of Voter replicas in the disaster recovery (DR) AZ | | ||
| | `replication-mode.dr-auto-sync.wait-store-timeout` | The waiting time for switching to asynchronous replication mode when network isolation or failure occurs | | ||
| | `replication-mode.dr-auto-sync.wait-recover-timeout` | The waiting time for switching back to the `sync-recover` status after the network recovers | |
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If sync-recover is a specific status name, it should be enclosed in backticks for clarity and consistency.1
Style Guide References
| | `replication-mode.dr-auto-sync.wait-recover-timeout` | The waiting time for switching back to the `sync-recover` status after the network recovers | | |
| | `replication-mode.dr-auto-sync.wait-recover-timeout` | The waiting time for switching back to the ``sync-recover`` status after the network recovers | |
Footnotes
| | `replication-mode.dr-auto-sync.dr-replicas` | The number of Voter replicas in the disaster recovery (DR) AZ | | ||
| | `replication-mode.dr-auto-sync.wait-store-timeout` | The waiting time for switching to asynchronous replication mode when network isolation or failure occurs | | ||
| | `replication-mode.dr-auto-sync.wait-recover-timeout` | The waiting time for switching back to the `sync-recover` status after the network recovers | | ||
| | `replication-mode.dr-auto-sync.pause-region-split` | Controls whether to pause Region split operations in the `async_wait` and `async` statuses | |
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If async_wait and async are specific status names, they should be enclosed in backticks for clarity and consistency.1
Style Guide References
| | `replication-mode.dr-auto-sync.pause-region-split` | Controls whether to pause Region split operations in the `async_wait` and `async` statuses | | |
| | `replication-mode.dr-auto-sync.pause-region-split` | Controls whether to pause Region split operations in the ``async_wait`` and ``async`` statuses | |
Footnotes
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This is an automated cherry-pick of #21204
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