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Document "non-voting replicas" #9039

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rmloveland opened this issue Dec 2, 2020 · 0 comments · Fixed by #10036
Closed

Document "non-voting replicas" #9039

rmloveland opened this issue Dec 2, 2020 · 0 comments · Fixed by #10036
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21.1

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rmloveland commented Dec 2, 2020 •
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To make CockroachDB v21.1 even more multi-region-er, we are adding a feature called "non-voting replicas", a.k.a. "long-lived learner replicas". These are used (AIUI) to achieve higher survivability and other Smurfy things.

Estimated scope of work:

  • Document approximately what they are / how they work in the architecture docs
  • Document any related other changes (such as new zone config fields)
  • AIUI there will be new SQL commands/statements which will be associated with survivability etc., which will be used to control these from a higher level (will file other issues for those SQL statements)
  • (update 20210223) be sure to document the performance implications of having lots of non-voting replicas

See also:
@rmloveland rmloveland self-assigned this Dec 2, 2020
@rmloveland rmloveland added this to the 21.1 milestone Dec 2, 2020
@rmloveland rmloveland mentioned this issue Feb 3, 2021
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This was referenced Feb 24, 2021
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rmloveland added a commit that referenced this issue Mar 22, 2021
@rmloveland
Add architecture docs on non-voting replicas
9c5c248 
Fixes #9039.

Summary of changes:

- Update 'Replication Layer' docs with a new section, *Non-voting
  replicas*, which explains what these puppies are and what they are
  useful for, with links to various related things such as:

  - zone config var
  - high-level multi-region SQL features they enable
  - other Raft-y things

- Also added a brief note to the 'Raft' section that mentions non-voting
  replicas and links to their section below.

- Finally, added an anchor link to the zone config vars for easier
  reference
@rmloveland rmloveland mentioned this issue Mar 22, 2021
Merged
rmloveland added a commit that referenced this issue Mar 22, 2021
@rmloveland
Add architecture docs on non-voting replicas
a2c5aaf 
Fixes #9039.

Summary of changes:

- Update 'Replication Layer' docs with a new section, *Non-voting
  replicas*, which explains what these puppies are and what they are
  useful for, with links to various related things such as:

  - zone config var
  - high-level multi-region SQL features they enable
  - other Raft-y things

- Also added a brief note to the 'Raft' section that mentions non-voting
  replicas and links to their section below.

- Finally, added an anchor link to the zone config vars for easier
  reference
rmloveland added a commit that referenced this issue Mar 23, 2021
@rmloveland
Add architecture docs on non-voting replicas
e2442e7 
Fixes #9039.

Summary of changes:

- Update 'Replication Layer' docs with a new section, *Non-voting
  replicas*, which explains what these puppies are and what they are
  useful for, with links to various related things such as:

  - zone config var
  - high-level multi-region SQL features they enable
  - other Raft-y things

- Also added a brief note to the 'Raft' section that mentions non-voting
  replicas and links to their section below.

- Finally, added an anchor link to the zone config vars for easier
  reference
@rmloveland rmloveland mentioned this issue Mar 24, 2021
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Add architecture docs on non-voting replicas cockroachdb/docs
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