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Release Notes

Release Notes for mongosync 1.3

Warning

Past Release Limitations

The Critical Advisories below affect some prior mongosync versions. Upgrade to the latest available patch release.

Issue
Affected Versions

mongosync could miss copying documents during long running reads in the initial copying phase if the source cluster is sharded and the source balancer is enabled.

1.1.0 - 1.7.1

Version 1.3 Released April 13, 2023

New Features

Capped Collections

Starting in 1.3.0, Cluster-to-Cluster Sync supports capped collections. For more information, see Capped Collections.

Disable Index Builds

Starting in 1.3.0, Cluster-to-Cluster Sync supports disabling non-essential index builds on the destination cluster. This can improve migration performance, especially with index heavy workloads.

For more information, see start.

Progress Output

Starting in 1.3.0, Cluster-to-Cluster Sync includes the mongosyncID and coordinatorID in the progress response documents. This helps determine whether the mongosync instance is serving as a coordinator.

Bug Fixes

  • Fixes a bug that could cause mongosync to not copy some documents to the destination cluster for clustered collections on replica sets.

Minimum Supported Version

Starting in 1.3.0, the minimum supported version of MongoDB is 6.0.5.

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