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docs: add reader-writer-separation feature report for v3.0.0#37

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tkykenmt merged 1 commit intomainfrom
docs/reader-writer-separation
Jan 7, 2026
Merged

docs: add reader-writer-separation feature report for v3.0.0#37
tkykenmt merged 1 commit intomainfrom
docs/reader-writer-separation

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@tkykenmt tkykenmt commented Jan 7, 2026

Summary

Adds feature report for Reader/Writer Separation (Scale to Zero) introduced in OpenSearch v3.0.0.

Feature Overview

Reader/Writer Separation enables segregation of indexing and search workloads across different hardware in remote-store-enabled clusters. Key capabilities:

  • Search Replicas: Dedicated replicas that handle search queries exclusively
  • _scale API: Enable/disable search-only mode to deactivate write workloads
  • Independent Scaling: Scale indexing and search capacity independently
  • Cost Efficiency: Use specialized hardware for each workload type

Main PRs Investigated

  • #17299: Search only replicas (scale to zero) with Reader/Writer Separation
  • #17803: Search Only strict routing setting

Documentation Sources

Closes #13

@tkykenmt tkykenmt merged commit 5a011fc into main Jan 7, 2026
@tkykenmt tkykenmt deleted the docs/reader-writer-separation branch January 7, 2026 05:17
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