How to Migrate from Redshift to MariaDB

How do I migrate data from Amazon Redshift to MariaDB safely?

Move schemas and data from Amazon Redshift to MariaDB with export, transform, and load steps that preserve types, indexes, and referential integrity.

Welcome to the Galaxy, Guardian!

Oops! Something went wrong while submitting the form.

Description

Example H2

Example H3

Why migrate from Redshift to MariaDB?

Teams move when they need cheaper analytics, open-source flexibility, or OLTP features. MariaDB’s storage engines and licensing cut costs while widening use cases.

What prerequisites are required?

Confirm MariaDB 10.6+ is running, the target schema exists, and the client host has AWS CLI, MariaDB client, and enough disk to stage S3 exports.

How do I export data from Redshift efficiently?

Use UNLOAD to write delimited, GZIP-compressed files to an S3 bucket in the same region. Parallel slices speed export and lower cost.

UNLOAD ('SELECT * FROM Orders') TO 's3://company-exports/orders_' IAM_ROLE 'arn:aws:iam::123456789012:role/redshift-unload' FORMAT AS CSV GZIP ALLOWOVERWRITE;

How can I load Redshift exports into MariaDB?

Download files, then stream them with LOAD DATA LOCAL INFILE. Disable foreign keys until all tables finish.

# Download aws s3 cp s3://company-exports/orders_ ./exports/ --recursive # MariaDB shell SET FOREIGN_KEY_CHECKS=0; LOAD DATA LOCAL INFILE 'exports/orders_part000.gz' INTO TABLE Orders FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' (id, customer_id, order_date, total_amount); SET FOREIGN_KEY_CHECKS=1;

Which tools automate the migration?

AWS Database Migration Service (DMS) or MariaDB MaxScale handle ongoing replication. AWS Schema Conversion Tool rewrites DDL and resolves type gaps.

What are best practices for type mapping?

Map Redshift BIGINT to MariaDB BIGINT, SUPER to JSON, and TIMESTAMP to DATETIME(6). Always create staging tables first, inspect, then promote.

How do I validate the migrated data?

Run row counts and checksums. A sample comparison query verifies numeric totals match across systems.

-- Redshift SELECT SUM(total_amount) FROM Orders; -- MariaDB SELECT SUM(total_amount) FROM Orders;

How do I switch production traffic?

Freeze Redshift writes, replicate the delta with DMS, reroute applications, and monitor latency. Roll back by pointing DNS to Redshift if needed.

What performance tuning is needed?

Add secondary indexes, tune innodb_buffer_pool_size, and enable query cache if reads dominate. Partition large order tables by year for fast pruning.

How does Galaxy accelerate the process?

Galaxy’s AI copilot rewrites Redshift SQL to MariaDB syntax, suggests index hints, and keeps migration scripts organized in shared Collections.

Why How to Migrate from Redshift to MariaDB is important

How to Migrate from Redshift to MariaDB Example Usage


-- Export Customers from Redshift and load into MariaDB
UNLOAD ('SELECT id,name,email,created_at FROM Customers')
TO 's3://ecom-migration/customers_'
IAM_ROLE 'arn:aws:iam::123456789012:role/redshift-unload'
FORMAT AS CSV GZIP;

# Bash: pull data
aws s3 cp s3://ecom-migration ./exports/ --recursive

-- MariaDB
LOAD DATA LOCAL INFILE 'exports/customers_part000.gz'
INTO TABLE Customers
FIELDS TERMINATED BY ',' ENCLOSED BY '"'
LINES TERMINATED BY '\n'
(id, name, email, created_at);

How to Migrate from Redshift to MariaDB Syntax


1. Export from Redshift:
UNLOAD ('SELECT * FROM <table>')
TO 's3://<bucket>/<prefix>'
IAM_ROLE '<role_arn>'
[PARALLEL] [MANIFEST] [FORMAT AS CSV|PARQUET] [GZIP] [ALLOWOVERWRITE];

2. Load into MariaDB:
LOAD DATA [LOW_PRIORITY] [LOCAL] INFILE '<file_path>'
INTO TABLE <table_name>
[FIELDS TERMINATED BY '<sep>' [ENCLOSED BY '<char>']]
[LINES TERMINATED BY '<eol>']
[(<col_list>)]
[SET <col>=<expr>, …];

3. Continuous replication (optional):
aws dms create-replication-task \
  --migration-type full-load-and-cdc \
  --source-endpoint-arn <redshift_ep> \
  --target-endpoint-arn <mariadb_ep> \
  --table-mappings file://mappings.json

Common Mistakes

Skipping type checks. Redshift SUPER or VARCHAR(65535) can overflow MariaDB limits. Fix by reviewing SCT reports and adjusting column sizes or JSON columns.
Loading with foreign keys enabled. LOAD DATA slows drastically when constraints fire per row. Disable FOREIGN_KEY_CHECKS before bulk imports and re-enable afterward.