The modern IBM InfoSphere Data Replication alternative
for log-based CDC.
TwinCommit is a Db2-first, log-based replication engine that teams evaluate as an IBM InfoSphere Data Replication (IIDR) alternative. It reads the Db2 recovery log directly, creates nothing on the source, and delivers every committed transaction exactly once to modern targets.
TwinCommit at a glance
- 0 objectsinstalled in your source database
- Exactly-oncecheckpoint commits with the data
- 1 binaryno JVM, manager or agents
- 22 connectorscovering the top 15 databases
- MCP serveroperate it from Claude, Copilot or Cursor
Why teams choose TwinCommit
What you get when you move off IBM InfoSphere Data Replication
Built for Db2 first
The Db2 log reader decodes row images natively, handles savepoint rollbacks and survives log archive rotation, with no capture tables.
No Access Server, no Management Console
Pipelines are YAML files. Status comes from the CLI, Prometheus and the MCP server.
Table-level fault isolation
If a table hits a non-loggable operation, only that table is marked broken. Everything else keeps flowing until you re-snapshot it.
Modern targets out of the box
Databricks, Snowflake, BigQuery, Redshift, Kafka, MongoDB and Elasticsearch are built in, alongside PostgreSQL and SQL Server.
Evaluation checklist
Questions to ask in any IBM InfoSphere Data Replication evaluation
Here is how TwinCommit answers each one. Put the same questions to every vendor on your shortlist.
| Question | TwinCommit |
|---|---|
| What has to be installed or enabled inside the source database? | ✓Nothing beyond standard logging settings. No triggers, capture tables, shadow tables or stored procedures. |
| How is exactly-once delivery guaranteed after a crash? | ✓The checkpoint is committed in the same target transaction as the data, so a restart never loses or repeats a transaction. |
| Are transactions applied in source commit order? | ✓Yes. Changes are buffered per transaction and applied at commit, in commit order. Rolled-back work never reaches the target. |
| What runs on the replication host? | ✓One static binary. No JVM, no application server, no separate manager process. |
| Does one product cover relational, NoSQL, warehouse and streaming targets? | ✓Yes. Oracle, MySQL, SQL Server, PostgreSQL, MongoDB, Cassandra, Redis, Elasticsearch, Snowflake, Databricks, Synapse, BigQuery, Redshift, S3/ADLS/GCS data lakes, Spark, Hive and Kafka all use the same pipeline format. |
| How do operators manage it day to day? | ✓CLI, Prometheus metrics and a built-in MCP server, so you can check lag, restart pipelines and re-snapshot tables from Claude, Copilot or Cursor. |
| How is it licensed? | ✓Flat per source database. Not per core, not per row, and not per target. |
| How long to the first replicated row? | ✓Minutes: twincommit check, twincommit snapshot, twincommit run. |
Migration path
From IBM InfoSphere Data Replication to TwinCommit in three steps
No big-bang cutover. Your source database doesn't change.
- 1
Export subscriptions
List the tables in each subscription and translate them into TwinCommit
tables:entries. Column exclusions map toexclude_columns. - 2
Snapshot and stream
twincommit snapshotrecords the log position and copies each table;twincommit runstreams from that position. - 3
Verify and switch
Run
twincommit verifyagainst the target, then repoint consumers and retire the old subscription.
TwinCommit vs IBM InfoSphere Data Replication: FAQ
Does TwinCommit need anything installed in Db2?
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No. It needs archive logging and DATA CAPTURE CHANGES on replicated tables, which are standard Db2 settings. It installs no triggers, CD tables or stored procedures.
Can TwinCommit replicate Db2 to Databricks?
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Yes. Db2 to Databricks is a standard TwinCommit route that lands changes in Delta Lake with MERGE.
What happens when someone runs LOAD or ALTER TABLE on the source?
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TwinCommit detects operations the log cannot fully describe and marks only that table as broken. A re-snapshot of the one table repairs it while the rest keep replicating.
More comparisons
IBM InfoSphere Data Replication (IIDR) is a trademark of IBM. TwinCommit is not affiliated with or endorsed by IBM. This page describes TwinCommit's capabilities. Ask each vendor to confirm how their product handles the questions above.
Run TwinCommit next to IBM InfoSphere Data Replication this week.
Download the free Developer edition, or have one of our replication engineers walk you through a migration plan.