AWS ElastiCache Support
Migrate self-managed Redis to ElastiCache.
Moving Redis from EC2 or another host to ElastiCache removes patching and failover work, but data has to move and clients must switch. Depending on size and downtime tolerance, the right path is an RDB snapshot seed, an online migration or a dual-write cutover. We pick and rehearse one.
When You Need This
The situations where this work pays for itself.
Signs it is time
- You run Redis on EC2 and want a managed service
- Redis failovers or patching cause incidents
- You are moving from a data center to AWS
- You need replicas, backups and monitoring without building them
- Your instance uses features that may not exist in ElastiCache
What you get
- Compatibility assessment and sizing
- Target ElastiCache setup in infrastructure as code
- Tested migration runbook with validation steps
- Rollback plan and post-cutover monitoring
How we do it
A clear, safe process you can follow along with.
1. Assess the current setup
We record the Redis version, memory use, persistence settings, cluster or standalone mode, modules, Lua scripts and any commands or configs that managed Redis restricts.
2. Check compatibility
ElastiCache supports specific engine versions and does not allow every module or config change. We check that the target version supports what you use, or plan application changes.
3. Size and design the target
We choose node type, shards and replicas from memory and throughput data, place it in private subnets, and set encryption, AUTH or access control lists and parameter groups.
4. Pick the data movement method
For cache-only data, starting empty and warming is often fine. To preserve data we seed from an RDB backup in S3 or use ElastiCache online migration where the source qualifies, and compare key counts.
5. Rehearse and validate
We run the migration on a copy, compare keys and sample values, and run the application against the new endpoint under load.
6. Cut over
We freeze writes or dual-write, sync the final delta, switch endpoints through configuration or DNS, and watch error rate, latency and memory.
7. Keep a fallback and decommission
We keep the old instance for a defined period, then retire it once metrics are stable.
Mistakes we help you avoid
Common ways this goes wrong, and what we do instead.
Skipping the compatibility check
Modules and some commands may not be available.
Underestimating memory
Replication and snapshots need headroom beyond the dataset.
Migrating without a cold-cache plan
If you start empty, the database may be overloaded until the cache warms.
Frequently Asked Questions
Can I migrate Redis to ElastiCache without downtime?
Online migration or dual writing can reduce downtime to a brief cutover, but always plan a short window and test it first.
Can I import an RDB file into ElastiCache?
Yes. Upload the RDB file to S3 and create a cluster that seeds from it, within version and size compatibility.
Is ElastiCache for Redis the same as open source Redis?
It is compatible for many uses but is a managed service with restrictions on some commands, configs and modules. ElastiCache also supports Valkey. Check current engine support.
Want Help With Migrate self-managed Redis to ElastiCache?
Schedule an appointment. Tell us about your environment and we will outline the safest, highest-value approach.
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