backup: adjust concurrency description after v8.2 #20963
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Hello @3pointer, 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
Hello! Gemini here, providing a summary of this pull request. This PR focuses on updating the documentation for the br (Backup & Restore) tool, specifically clarifying the roles and recommended usage of the --ratelimit and --concurrency parameters when controlling backup performance and impact on the cluster. It removes the --ratelimit parameter from several example commands and revises the guidance on performance tuning, emphasizing the tikv.backup.num-threads configuration as the primary method.
Highlights
- Documentation Update: Updates the documentation for the
brtool, specifically related to backup performance tuning parameters. - Clarified Parameter Usage: Provides clearer explanations for the
--ratelimitand--concurrencyparameters, detailing their actual effect on backup tasks. - Performance Tuning Recommendation: Recommends using the TiKV configuration parameter
backup.num-threadsas the primary method for controlling backup impact and performance, rather than thebrcommand-line parameters. - Example Command Updates: Removes the
--ratelimitparameter from several exampletiup br backupcommands in the documentation.
Changelog
Click here to see the changelog
- br/br-snapshot-guide.md
- Removed
--ratelimit 128from the exampletiup br backup fullcommand. - Removed the description for the
--ratelimitparameter. - Revised the section on controlling backup impact, recommending
tikv.backup.num-threadsas the primary method and explaining--ratelimitas an alternative with caveats.
- Removed
- br/br-snapshot-manual.md
- Removed
--ratelimit 128from the exampletiup br backup fullcommand. - Removed the description for the
--ratelimitparameter. - Removed
--ratelimit 128from the exampletiup br backup dbcommand. - Removed
--ratelimit 128from the exampletiup br backup tablecommand. - Removed
--ratelimit 128from the exampletiup br backup fullcommand with filtering.
- Removed
- br/use-br-command-line-tool.md
- Updated the description for the
--concurrencyparameter to clarify its role in request splitting and recommendtikv.backup.num-threadsfor performance tuning.
- Updated the description for the
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Code Review
This pull request provides a valuable update to the documentation for BR's --ratelimit and --concurrency parameters. The changes significantly improve clarity by:
- Recommending
backup.num-threadsas the primary method for controlling backup impact, and positioning--ratelimitas an alternative for specific scenarios. - Clarifying the current role and effect of the
--concurrencyparameter.
The updated descriptions are more informative and will help users better understand how to manage backup performance and resource utilization. The changes generally adhere to the TiDB Documentation Style Guide.
I have a few minor suggestions for further refinement, mostly related to consistency and formatting. Overall, this is a good improvement to the documentation.
The review was guided by the TiDB Documentation Style Guide, focusing on:
- Clarity, Simplicity, Completeness, and Readability (Style Guide Line 14): Ensuring the updated descriptions for
ratelimitandconcurrencyare easy for users to understand. - Technical Accuracy and Terminology Consistency (Style Guide Line 16): Verifying parameter names and their descriptions, leading to a suggestion for the
backup.num-threadslink text. - Avoiding Unnecessary Words/Repetition (Style Guide Line 24): Pointing out an extra space.
- Consistent Terminology (and by extension, formatting) (Style Guide Line 25): Suggesting consistent note formatting.
Summary of Findings
- Note Formatting Consistency: Suggested a minor change to note formatting for consistency across documentation files.
- Minor Typographical Error: Identified an extra space after a period that could be removed.
- Link Text Precision: Recommended updating link text to use the exact parameter name for improved technical accuracy.
Merge Readiness
The pull request significantly improves the documentation for BR's ratelimit and concurrency parameters. The changes are clear, accurate, and well-aligned with the project's direction for these features. I've made a few minor suggestions for consistency and formatting. After addressing these small points, or if they are deemed non-critical, the documentation should be in excellent shape. As per the repository's contribution guidelines, I am providing comments rather than requesting changes to avoid blocking the merge. The final decision to merge rests with the maintainers.
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
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Co-authored-by: xixirangrang <[email protected]>
Co-authored-by: xixirangrang <[email protected]>
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: hfxsd The full list of commands accepted by this bot can be found here. The pull request process is described here
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In response to a cherrypick label: new pull request created to branch |
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In response to a cherrypick label: new pull request created to branch |
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In response to a cherrypick label: new pull request created to branch |
Signed-off-by: ti-chi-bot <[email protected]>
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