SAP HANA to Db2
real-time replication
TwinCommit replicates SAP HANA to IBM Db2 in real time by reading the SAP HANA transaction log and applying every committed change exactly once and in commit order. Use it to migrate or continuously mirror SAP HANA into Db2 with zero downtime, with no triggers or capture tables on the source.
SAP HANA
log reader
commit-ordered · exactly-once
Db2
native writer
How capture works on SAP HANA
TwinCommit reads the SAP HANA redo log through a log-reader technical user and decodes row and column-store changes, with no triggers or shadow tables in your SAP schema.
Prerequisites
- ✓log_mode = normal
- ✓Technical user with LOG ADMIN and CATALOG READ
- ✓Primary keys on replicated tables
How apply works on Db2
Array MERGE statements committed in the same unit of work as the TwinCommit checkpoint.
Requirements
- ✓Archive logging enabled (LOGARCHMETH1)
- ✓DATA CAPTURE CHANGES on each replicated table
- ✓A primary key or unique index on each replicated table
- ✓DBADM (or SYSADM) for the capture user
Setup
Set up SAP HANA → Db2 in four steps
- 1
Prepare SAP HANA
Run twincommit check. It verifies log_mode = normal and the other prerequisites, and prints the exact fix for anything missing.
- 2
Point at Db2
Add a target block for Db2. 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: saphana
host: hana.internal:30015
user: ${HANA_USER}
password: ${HANA_PASSWORD}
target:
type: db2
database: REPLDB
user: ${DB2_TARGET_USER}
password: ${DB2_TARGET_PASSWORD}
tables:
- source: SALES.ORDERS
- source: SALES.ORDER_LINES
exclude_columns: [INTERNAL_NOTES]SAP HANA to Db2 replication FAQ
How does TwinCommit replicate SAP HANA to Db2?
+
TwinCommit reads changes from the SAP HANA transaction log, buffers them per transaction, and applies each committed transaction to Db2 in commit order. Array MERGE statements committed in the same unit of work as the TwinCommit checkpoint.
Does SAP HANA to Db2 replication need triggers or capture tables?
+
No. TwinCommit reads the SAP HANA log directly and creates no objects in the source database.
Is SAP HANA to Db2 replication exactly-once?
+
Yes. TwinCommit commits its checkpoint in the same Db2 transaction as the data, so a crash or restart never loses or duplicates a transaction.
What SAP HANA versions are supported?
+
SAP HANA 2.0 SPS05+ · SAP HANA Cloud · S/4HANA and BW/4HANA schemas.
Stream SAP HANA to Db2 today.
Download the free Developer edition, or have one of our replication engineers walk you through a migration plan.