PCSM-148 Sharding support #17
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Pull request overview
This PR adds sharding support to {{pcsm.full_name}} (version 0.7.0) as a technical preview feature. The changes enable replication between sharded MongoDB clusters while maintaining the existing replica set functionality.
Key changes:
- Introduces comprehensive sharding documentation explaining how {{pcsm.short}} connects through
mongosinstances - Updates product documentation to reflect that sharded clusters are now supported (tech preview)
- Restructures workflow documentation to accommodate both replica set and sharded cluster topologies
Reviewed changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
| docs/sharding.md | New comprehensive documentation detailing sharding support, prerequisites, connection strings, balancer behavior, and usage instructions |
| docs/limitations.md | Removed "sharded clusters not supported" limitation and added new sharding-specific limitation about chunk distribution |
| docs/intro.md | Restructured workflow documentation with tabs separating replica set and sharded cluster scenarios |
| docs/install/usage.md | Updated references from {{plm}} to {{pcsm}} and clarified workflow steps |
| docs/install/authentication.md | Added sharded cluster connection string examples with mongos configuration |
| docs/deployment.md | Reorganized content with new sections for version requirements, architectures, and deployment types |
Comments suppressed due to low confidence (1)
docs/sharding.md:1
- The link reference points to
sharding.md#limitations, but the sharding.md file does not contain a section with the anchor#limitations. This will result in a broken link. Consider either adding a 'Limitations' section to sharding.md or updating the link to point to the correct section (e.g.,sharding.md#chunk-distribution).
# Sharding support in {{pcsm.full_name}} (Technical Preview)
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Added info about results of not replicated metadata
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sandraromanchenko
suggested changes
Dec 17, 2025
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inelpandzic
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docs/intro.md
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| 3. **Real-time replication**: After the initial data sync, {{pcsm.short}} monitors changes in the source and replicates them to the target at runtime. You don't have to stop your source deployment—it operates as usual, accepting client requests. {{pcsm.short}} uses [change streams :octicons-link-external-16:](https://www.mongodb.com/docs/manual/changeStreams/) to track the changes to your data and replicate them to the target. | ||
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| 4. **Control replication**: You can `pause` the replication and `resume` it later. When paused, {{pcsm.short}} saves the timestamp when it stops the replication. After you resume {{pcsm.short}}, it copies the changes from the saved timestamp and continues real-time replication. See [Pause the replication](install/usage.md#pause-the-replication) and [Resume the replication](install/usage.md#resume-the-replication) for command details. |
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it copies the changes from the saved timestamp and continues real-time replication.
It will not copy anything after you resume, but rather PCSM starts watching change stream events from the moment the pause happened.
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inelpandzic
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sandraromanchenko
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