MongoDB to SAP HANA
real-time replication
TwinCommit replicates MongoDB to SAP HANA in real time by reading the MongoDB transaction log and applying every committed change exactly once and in commit order. Use it to migrate or continuously mirror MongoDB into SAP HANA with zero downtime, with no triggers or capture tables on the source.
MongoDB
log reader
commit-ordered · exactly-once
SAP HANA
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 SAP HANA
Array UPSERT and DELETE statements committed in the same transaction as the TwinCommit checkpoint.
Requirements
- ✓log_mode = normal
- ✓Technical user with LOG ADMIN and CATALOG READ
- ✓Primary keys on replicated tables
Setup
Set up MongoDB → SAP HANA 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 SAP HANA
Add a target block for SAP HANA. 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: saphana
host: hana.internal:30015
user: ${HANA_USER}
password: ${HANA_PASSWORD}
schema: REPLICA
tables:
- source: sales.orders
- source: sales.customersMongoDB to SAP HANA replication FAQ
How does TwinCommit replicate MongoDB to SAP HANA?
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TwinCommit reads changes from the MongoDB transaction log, buffers them per transaction, and applies each committed transaction to SAP HANA in commit order. Array UPSERT and DELETE statements committed in the same transaction as the TwinCommit checkpoint.
Does MongoDB to SAP HANA 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 SAP HANA replication exactly-once?
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Yes. TwinCommit commits its checkpoint in the same SAP HANA 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 SAP HANA today.
Download the free Developer edition, or have one of our replication engineers walk you through a migration plan.