MongoDB to Snowflake
real-time replication
TwinCommit replicates MongoDB to Snowflake in real time by reading the MongoDB transaction log and applying every committed change exactly once and in commit order. Use it to feed Snowflake with live MongoDB data for analytics, AI and reporting, with no triggers or capture tables on the source.
MongoDB
log reader
commit-ordered · exactly-once
Snowflake
native writer
How capture works on MongoDB
TwinCommit opens change streams on replica sets and sharded clusters, persists resume tokens with the checkpoint, and keeps multi-document transactions intact.
Prerequisites
- ✓Replica set or sharded cluster (change streams need an oplog)
- ✓changeStream and find privileges on watched databases
- ✓Pre- and post-images enabled for full before/after values (optional)
How apply works on Snowflake
Rows land through Snowpipe Streaming into a change table and are merged into the target on a short, configurable interval.
Requirements
- ✓Key-pair authentication for a service user
- ✓A warehouse for the MERGE step
- ✓OWNERSHIP or INSERT/UPDATE/DELETE on the target schema
Setup
Set up MongoDB → Snowflake in four steps
- 1
Prepare MongoDB
Run twincommit check. It verifies replica set or sharded cluster (change streams need an oplog) and the other prerequisites, and prints the exact fix for anything missing.
- 2
Point at Snowflake
Add a target block for Snowflake. TwinCommit can generate target DDL with twincommit ddl -apply.
- 3
Snapshot
twincommit snapshot copies each table under a brief share lock and records the exact log position.
- 4
Stream
twincommit run streams every committed change from that position, exactly once and in commit order.
source:
type: mongodb
uri: ${MONGODB_URI}
target:
type: snowflake
account: myorg-myaccount
warehouse: REPLICATION_WH
database: RAW
private_key_file: /secrets/sf.p8
tables:
- source: sales.orders
- source: sales.customersMongoDB to Snowflake replication FAQ
How does TwinCommit replicate MongoDB to Snowflake?
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TwinCommit reads changes from the MongoDB transaction log, buffers them per transaction, and applies each committed transaction to Snowflake in commit order. Rows land through Snowpipe Streaming into a change table and are merged into the target on a short, configurable interval.
Does MongoDB to Snowflake replication need triggers or capture tables?
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No. TwinCommit reads the MongoDB log directly and creates no objects in the source database.
Is MongoDB to Snowflake replication exactly-once?
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Yes. TwinCommit commits its checkpoint in the same Snowflake transaction as the data, so a crash or restart never loses or duplicates a transaction.
What MongoDB versions are supported?
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MongoDB 5.0–8.x · MongoDB Atlas · replica sets and sharded clusters.
Stream MongoDB to Snowflake today.
Download the free Developer edition, or have one of our replication engineers walk you through a migration plan.