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Document that livesync copies compressed chunks uncompressed - #434

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arajkumar/uncompressed-copy-limitation
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Document that livesync copies compressed chunks uncompressed#434
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arajkumar/uncompressed-copy-limitation

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@arajkumar

@arajkumar arajkumar commented Aug 3, 2026

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Document that Livesync and the Postgres connector copy logical data by decompressing compressed hypertable chunks on the fly, so the target starts with columnstore data in row form. Copying chunks as-is is still on the roadmap.

Describe your changes

In response to a customer asking whether Livesync syncs chunks in compressed form. It doesn't: it decompresses on the fly during table copy. Added a concise limitation to both the Livesync replication Limitation section and the Postgres source connector limitations so this is documented instead of only on Slack.

Affected pages

Related Issues

Issue: Reported on https://timescaledb.slack.com/archives/C4GT3N90X/p1785765777196739?thread_ts=1785436425.747419&cid=C4GT3N90X

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  • - I have verified all images and videos are clear and match production (or dev for unreleased features).
  • - I have checked the component kitchen sink for any visual breakage (only needed if you changed components, styles, or dependencies). A link to this PR's own preview appears under Affected pages once the build deploys.
  • - This references a feature that is public. If not, add a note and we can schedule the merge for after the feature release.

Livesync and the Postgres connector copy logical data by decompressing
compressed hypertable chunks on the fly. Note this limitation and that
copying chunks as-is is still on the roadmap.
@arajkumar
arajkumar requested a review from a team August 3, 2026 14:10
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⚠️ Checklist Incomplete

Please complete all checklist items in the PR description before requesting review.

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  • I have reviewed my changes
  • I have confirmed the content is technically accurate
  • I have tested any code that is added or updated
  • I have confirmed the content is free of typos or grammar errors
  • I have verified all images and videos are clear and match production
  • This references a feature that is public

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