How to observe the delay of data synchronization between TiFlash and tikv
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contribution
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type/question
- Dominant language
- C++
- Stars
- 1k
- Forks
- 423
- Avg merge
- 1d 15h
- Merged PRs (30d)
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Description
I would like to know how I can check the data latency between the current TiFlash nodes and TiKV nodes. For example, how many seconds they differ by, or the difference in Raft Log Index. Do we currently have such metrics? Thank you.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reviewing the existing TiFlash and TiKV observability documentation and metric definitions for synchronization latency and Raft Log Index. Determine whether these metrics already exist, then document how to compare them; if they do not, record the missing measurements and their intended meaning.
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Assessment
- Tech stack
- cpp
- Domain
- databases, distributed-systems, observability
- Issue type
- Documentation
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100