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DOC-14: document Cloud topic segment size default#626

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DOC-14-cloud-segment-size-default
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DOC-14: document Cloud topic segment size default#626
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DOC-14-cloud-segment-size-default

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@micheleRP

@micheleRP micheleRP commented Jul 1, 2026

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Resolves DOC-14.

What

Adds a Segment size row to the topic-properties table on the Cloud "Topics Overview" page (modules/develop/pages/topics/create-topic.adoc).

Why

Redpanda Cloud sets log_segment_size to 128 MiB at the cluster level, unlike self-managed Redpanda (1 GiB). This Cloud-specific default was not documented anywhere in cloud-docs, so Cloud users relying on the self-managed default were misinformed. Verified against cloudv2 main (install-pack fixtures, cluster-config runbook).

Note for reviewers

The per-tier min/max are intentionally described as "limits that depend on your cluster tier" rather than hardcoded. install-pack/generate-tiers.py (max = tier default) and the install-pack fixtures (max 256 MiB, min 16 MiB) disagree, so the exact range isn't reliable across tiers. Recommend confirming the min/max with the Cloud team before stating explicit numbers.

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🤖 Generated with Claude Code

Add a Segment size row to the Cloud topic-properties table. Redpanda
Cloud sets log_segment_size to 128 MiB at the cluster level, unlike
self-managed Redpanda (1 GiB), and this was not documented anywhere in
cloud-docs. The per-tier min/max are intentionally described as
tier-dependent rather than hardcoded, pending Cloud-team confirmation.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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