Limitations

These are current limitations of dsync— take note that these areas may require manual intervention or special consideration during your migration process.

General

DDL and Index Replication

Currently, dsync does not replicate Data Definition Language (DDL) statements or indexes from the source to the destination. This means that any database schema changes or index configurations must be handled separately to ensure they are correctly applied to the destination.

Conflicts on the Destination

Dsync does not manage conflicts on the destination system. If documents with the same _id already exist on the destination, they will be overwritten by the incoming data from the source. As a result, users need to take care when migrating data to avoid unintended overwrites.

Cosmos DB

Partitioning

Current data partitioning for Cosmos DB only works for collections with _id values of the ObjectId type. It works best when the values are evenly distributed through the lifetime of the collection, which is true for most applications.

vCore Cosmos DB

vCore Cosmos version isn't supported as it doesn't expose the ChangeStream API yet.