docs(ticdc): add design doc for multiple topics

[Rustin170506]

What problem does this PR solve?

Issue Number: ref #4423

What is changed and how it works?

add design doc for multiple topics.

rendered

Check List

Tests

• No code

Code changes

None

Side effects

None

Related changes

None

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• amyangfei
• overvenus

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[codecov-commenter]

Codecov Report

Merging #4422 (9423549) into master (9607554) will decrease coverage by 0.0163%.
The diff coverage is 24.7311%.

Flag	Coverage Δ
cdc	59.9390% <42.8571%> (+0.0168%)	⬆️
dm	52.0056% <21.5189%> (-0.0233%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

@@               Coverage Diff                @@
##             master      #4422        +/-   ##
================================================
- Coverage   55.6402%   55.6238%   -0.0164%     
================================================
  Files           494        495         +1     
  Lines         61283      61186        -97     
================================================
- Hits          34098      34034        -64     
+ Misses        23750      23726        -24     
+ Partials       3435       3426         -9     

[dveeden]

How does this work with the schema registry? will the topics match the names in the registry? or is it outside of the scope of this design?

[dveeden]

I think this can be used to match the current schema registry naming. The later on prefix support needs to be added that is compatible with registry naming

[ti-chi-bot]

@dveeden: Thanks for your review. The bot only counts approvals from reviewers and higher roles in list, but you're still welcome to leave your comments.

In response to this:

I think this can be used to match the current schema registry naming. The later on prefix support needs to be added that is compatible with registry naming

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[Rustin170506]

How does this work with the schema registry? will the topics match the names in the registry? or is it outside of the scope of this design?

Yes, it's a bit out the scope of this design. It's mainly for multi-topic support. arvo's registry is not in consideration. Thanks for the review. We will discuss more about improving the arvo protocol with you in the near future.

[Rustin170506]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 9423549

[Rustin170506]

/run-kafka-integration-test