Refine tiflash FAQ and configuration docs #20851
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Signed-off-by: JaySon-Huang <[email protected]>
Signed-off-by: JaySon-Huang <[email protected]>
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Hello @JaySon-Huang, 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!
Summary of Changes
This pull request focuses on refining the TiFlash FAQ and configuration documentation. The changes include updates to the create-tiflash-replicas.md, tiflash-configuration.md, and troubleshoot-tiflash.md files. The primary goal is to improve the clarity, accuracy, and completeness of the TiFlash documentation, providing users with better guidance on configuring, troubleshooting, and managing TiFlash deployments.
Highlights
- Replication Improvements: The
create-tiflash-replicas.mdfile is updated to include instructions for adjusting theremove-peerrestriction when rebalancing Regions from old to new TiFlash nodes. - Configuration Parameters: The
tiflash-configuration.mdfile has been updated to remove the PD scheduling parameters section and clarify the usage of floating-point numbers for memory usage limits since v6.6.0. - Troubleshooting Updates: The
troubleshoot-tiflash.mdfile is updated to include a check for CPU support for vector extension instruction sets (AVX2 for AMD64, ARMv8 for ARM64) and reorganizes the 'TiFlash replica is always unavailable' section.
Changelog
- tiflash/create-tiflash-replicas.md
- Added instructions for adjusting the
remove-peerrestriction when rebalancing Regions from old to new TiFlash nodes. - Added
remove-peercommand to the example for setting snapshot write speed limit.
- Added instructions for adjusting the
- tiflash/tiflash-configuration.md
- Removed the PD scheduling parameters section.
- Clarified that floating-point numbers can be used for memory usage limits since v6.6.0.
- tiflash/troubleshoot-tiflash.md
- Added a check for CPU support for vector extension instruction sets (AVX2 for AMD64, ARMv8 for ARM64).
- Reorganized the 'TiFlash replica is always unavailable' section, providing a more structured approach to troubleshooting.
- Removed the 'Data is not replicated to TiFlash' section and integrated its content into the 'TiFlash replica is always unavailable' section.
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Code Review
This pull request refines the TiFlash FAQ and configuration documentation. The changes include adding information about adjusting remove-peer restrictions, updating the memory usage limit description, reorganizing the multi-disk deployment section, and troubleshooting steps for unavailable replicas. Overall, the changes aim to improve the clarity, accuracy, and completeness of the documentation.
Summary of Findings
- Inconsistent terminology: The phrase 'system CPU supports vector extension instruction sets' could be reworded for better clarity and consistency with other documentation.
- Clarity and simplicity: The documentation could benefit from more concise and direct language, especially in the troubleshooting sections.
- Completeness and readability: The reorganization of the multi-disk deployment section improves readability, but ensuring all relevant information is easily accessible is crucial.
Merge Readiness
The pull request includes several helpful refinements to the TiFlash documentation. However, some areas could benefit from improved clarity and consistency. Addressing the identified issues would enhance the documentation's overall quality and user experience. I am unable to approve this pull request, and recommend that another reviewer also reviews this code before merging.
Signed-off-by: JaySon-Huang <[email protected]>
Signed-off-by: JaySon-Huang <[email protected]>
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Code Review
The pull request refines the TiFlash FAQ and configuration documentation, adding useful troubleshooting steps and clarifying configuration options. The changes are well-organized and address relevant issues. However, there are a few areas where the language could be more precise and consistent, and some instructions could be clearer.
Summary of Findings
- Inconsistent terminology: The documentation uses both 'Linux AMD64 architecture' and 'Linux ARM64 architecture' in some places, and 'Linux AMD64 architecture' and 'Linux ARM64 architecture' in others. It would be better to pick one and stick to it for consistency.[^1]
- Unclear step instructions: In the 'TiFlash replica is always unavailable' section, the instructions could be more direct and easier to follow. Consider rephrasing for clarity.[^1]
- Incomplete sentence: In the 'Data is not replicated to TiFlash' section, there's an incomplete sentence that needs to be completed or removed.[^1]
Merge Readiness
The pull request is almost ready for merging. Addressing the identified issues, particularly those related to clarity and consistency, would further improve the documentation. I am unable to approve this pull request, and recommend that others review and approve this code before merging. I recommend that the pull request not be merged until the high severity issues are addressed.
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First-time contributors' checklist
What is changed, added or deleted? (Required)
remove-peerrestriction when rebalancing Regions from old to new TiFlash nodes.profiles.default.max_memory_usage_for_all_queriessince v6.6.0.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?