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PowerSync Service 1.26.0 is out, introducing storage version 4 with two big improvements: - Incremental reprocessing for MongoDB - S3 object storage for bulk sync data TL;DRs below 👇

Incremental Reprocessing One of the biggest pain points with PowerSync was that even a small change to your sync config required re-replicating everything from scratch, and clients had to re-sync all their data.

With storage version 4, most Sync Streams deploys reprocess only the streams you’ve added or changed. Clients only re-download data for those affected streams. Some changes still require a full reprocess, but routine config updates become much lighter.

Available for MongoDB sources using Sync Streams. Support for Postgres and other source databases is planned.

Bucket storage on S3 When enabled, larger batches of sync data move from the instance’s storage database to S3. The Service reads them from S3 and streams them to clients.

That reduces load on the storage database, improving initial sync speed and stability, especially with large datasets or many clients connecting at once. It also increases capacity for concurrent clients.

Storage version 4 and S3 are rolling out automatically to Free plan instances. Other plans can opt in, with S3 enabled separately. The upgrade involves a one-time full client re-sync. Rollout details and setup instructions: