MariaDB to Redis
real-time replication
TwinCommit replicates MariaDB to Redis in real time by reading the MariaDB transaction log and applying every committed change exactly once and in commit order. Use it to keep a Redis cache exactly in sync with MariaDB, with no triggers or capture tables on the source.
MariaDB
log reader
commit-ordered · exactly-once
Redis
native writer
How capture works on MariaDB
TwinCommit reads the row-based binary log as a replica using MariaDB GTIDs, and follows Galera cluster failover automatically.
Prerequisites
- ✓binlog_format = ROW and binlog_row_image = FULL
- ✓REPLICATION SLAVE and BINLOG MONITOR grants
- ✓log_slave_updates on Galera nodes
How apply works on Redis
Each row is written as a Redis hash (or JSON document) under a key template such as `orders:{ORDER_ID}`, with deletes removing the key. Optionally every change is also appended to a Redis Stream.
Requirements
- ✓A key template per table
- ✓ACL user with write access to the key prefix
- ✓TLS endpoint recommended
Setup
Set up MariaDB → Redis in four steps
- 1
Prepare MariaDB
Run twincommit check. It verifies binlog_format = row and binlog_row_image = full and the other prerequisites, and prints the exact fix for anything missing.
- 2
Point at Redis
Add a target block for Redis. 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: mariadb
dsn: ${SOURCE_DSN}
server_id: 4201
target:
type: redis
url: rediss://cache.internal:6380
key_template: "{table}:{pk}"
format: hash
tables:
- source: SALES.ORDERS
- source: SALES.ORDER_LINES
exclude_columns: [INTERNAL_NOTES]MariaDB to Redis replication FAQ
How does TwinCommit replicate MariaDB to Redis?
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TwinCommit reads changes from the MariaDB transaction log, buffers them per transaction, and applies each committed transaction to Redis in commit order. Each row is written as a Redis hash (or JSON document) under a key template such as orders:{ORDER_ID}, with deletes removing the key. Optionally every change is also appended to a Redis Stream.
Does MariaDB to Redis replication need triggers or capture tables?
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No. TwinCommit reads the MariaDB log directly and creates no objects in the source database.
Is MariaDB to Redis replication exactly-once?
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Yes. TwinCommit commits its checkpoint in the same Redis transaction as the data, so a crash or restart never loses or duplicates a transaction.
What MariaDB versions are supported?
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MariaDB 10.6, 10.11, 11.x · Galera Cluster · SkySQL · Amazon RDS for MariaDB.
Stream MariaDB to Redis today.
Download the free Developer edition, or have one of our replication engineers walk you through a migration plan.