No, Memcached does not natively support multi-AZ (availability zone) deployment. It is designed as an in-memory caching solution that stores data in memory and provides fast access to frequently used data to speed up web applications.
Multi-AZ deployment refers to deploying the same application or service in multiple availability zones in a given region. This approach ensures high availability and fault tolerance by distributing the workload across different zones. In case of a failure in one zone, the traffic can be routed to another zone without disruption.
However, there are ways to achieve multi-AZ deployment with Memcached using third-party tools like ElastiCache for Memcached, which is a managed caching service provided by AWS. With ElastiCache, you can configure Memcached clusters in multiple AZs, and the service will handle failover automatically.
Here's an example of how to create a Memcached cluster in multiple AZs using ElastiCache:
aws elasticache create-cache-cluster --cache-cluster-id my-memcached-cluster \ --cache-node-type cache.m3.medium \ --engine memcached \ --num-cache-nodes 2 \ --preferred-availability-zones us-east-1a,us-east-1b \ --auto-failover-enabled \ --cache-subnet-group-name my-subnet-group \ --security-group-ids my-security-group
In the above command, we're creating a Memcached cluster with two nodes in two different availability zones (us-east-1a and us-east-1b). The
--auto-failover-enabled flag enables automatic failover, and the
--cache-subnet-group-name specifies the subnet group where the nodes will be deployed. The
--security-group-ids parameter specifies the security group associated with the nodes.
Note that using a managed service like ElastiCache can save you the hassle of managing your own Memcached deployment and also provides additional features such as automatic scaling, security, and monitoring.
Dragonfly is fully compatible with the Redis ecosystem and requires no code changes to implement.