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Amazon ElastiCache

User Guide (API Version 2015-02-02)

What Is Amazon ElastiCache?
- Use Cases
- ElastiCache Resources
- Tutorial Videos
- Components and Features
- ElastiCache for Redis Terminology
- Accessing ElastiCache
- Managing ElastiCache
Getting Started
- Determine Your Requirements [Every time]
- Step 1: Create an AWS Account and Permissions
- Step 2: Launch a Cluster
- Step 3: (Optional) View Cluster Details
- Step 4: Authorize Access
- Step 5: Connect to a Cluster's Node
- Step 6: Delete Your Cluster
- Where Do I Go From Here?
Engines and Versions
- Choosing an Engine: Memcached, Redis (cluster mode disabled), or Redis (cluster mode enabled)
- Determine Available Engine Versions
- Memcached Versions
- Redis Versions
- Upgrading Engine Versions
- Maintenance Window
Choosing Regions and Availability Zones
Finding Endpoints
Notifications
Best Practices
- Ensuring You Have Sufficient Memory to Create a Redis Snapshot
- Managing Reserved Memory (Redis)
- Mitigating Out-of-Disk-Space Issues When Using Redis AOF
- Mitigating Failures
- Configuring Your ElastiCache Client for Efficient Load Balancing
- Best Practices: Online Resharding
Error Messages
Caching Strategies
Nodes
- Choosing Your Node Size
- Connecting to Nodes
- Reserved Nodes
- Supported Node Types
- Actions You Can Take When a Node is Scheduled for Replacement
Node Auto Discovery (Memcached)
- Benefits of Auto Discovery
- How Auto Discovery Works
- Using Auto Discovery
- Connecting to Cache Nodes Manually
- Adding Auto Discovery To Your Client Library
- Auto Discovery Clients
  - Installing & Compiling Clients
  - Configuring Clients
Shards (Redis)
Clusters
- Creating a Cluster
- Viewing a Cluster's Details
- Modifying a Cluster
- Rebooting a Cluster
- Monitoring a Cluster's Costs
- Adding Nodes to a Cluster
- Removing Nodes from a Cluster
- Canceling Pending Add or Delete Node Operations
- Deleting a Cluster
Scaling
- Scaling Memcached
- Scaling Single-Node Redis (cluster mode disabled) Clusters
  - Scaling Up Single-Node Redis Clusters
  - Scaling Down Redis Cache Clusters
- Scaling Redis (cluster mode disabled) Clusters with Replica Nodes
- Scaling for Amazon ElastiCache for Redis—Redis (cluster mode enabled)
Replication (Redis)
- Redis Replication
- Replication: Redis (cluster mode disabled) vs. Redis (cluster mode enabled)
- Replication: Multi-AZ with Automatic Failover (Redis)
- How Synchronization and Backup are Implemented
- Creating a Cluster with Replicas
  - Creating a Cluster with Replicas Using an Existing Cluster
  - Creating a Redis Cluster with Replicas from Scratch
    - Creating a Redis (cluster mode disabled) Cluster with Replicas from Scratch
    - Creating a Redis (cluster mode enabled) Cluster with Replicas from Scratch
- Viewing a Replication Group's Details
- Finding Replication Group Endpoints
- Modifying a Cluster with Replicas
- Deleting a Cluster with Replicas
- Adding a Read Replica
- Promoting a Read-Replica
- Deleting a Read Replica
Backup and Restore (Redis)
- Scheduling Automatic Backups
- Making Manual Backups
- Creating a Final Backup
- Describing Backups
- Copying a Backup
- Exporting a Backup
- Restoring from a Backup
- Seeding a Cluster with a Backup (Redis)
- Tagging Backups
- Deleting a Backup
- Redis Append Only Files (AOF)
Security Groups [EC2-Classic]
- Creating a Security Group
- Listing Available Security Groups
- Viewing a Security Group
- Authorizing Network Access to an Amazon EC2 Security Group
Parameters and Parameter Groups
- Parameter Management
- Parameter Group Tiers
- Creating a Parameter Group
- Listing Parameter Groups by Name
- Listing a Parameter Group's Values
- Modifying a Parameter Group
- Deleting a Parameter Group
- Memcached Specific Parameters
- Redis Specific Parameters
Subnets and Subnet Groups
- Creating a Subnet Group
- Assigning a Subnet Group to a Cluster or Replication Group
- Modifying a Subnet Group
- Deleting a Subnet Group
Amazon VPC with ElastiCache
- Understanding ElastiCache and Amazon VPCs
- Amazon VPC Access Patterns
- Creating a Virtual Private Cloud (VPC)
- Creating a Cache Subnet Group
- Creating a Cache Cluster in an Amazon VPC
- Creating a Replication Group in an Amazon VPC
- Connecting to a Cluster or Replication Group Running in an Amazon VPC
Data Security and Compliance
- Security Groups
- Authentication & Access Control
- Authenticating with AUTH (Redis)
- Data Encryption (Redis)
  - In-Transit Encryption (Redis)
  - At-Rest Encryption (Redis)
- HIPAA Compliance (Redis)
Accessing ElastiCache Resources from Outside AWS
Monitoring
- Monitoring Use
- Monitoring Events
- Monitoring Costs with Tags
Using the ElastiCache API
- Using the Query API
- Available Libraries
- Troubleshooting Applications
- Logging API Calls
Tutorials
Document History
AWS Glossary

Getting Started with Amazon ElastiCache

Beginning with determining the requirements for your cluster and creating your own AWS account, the topics in this section walk you through the process of creating, granting access to, connecting to, and finally deleting a Redis (cluster mode disabled) cluster using the ElastiCache console.

Amazon ElastiCache supports high availability through the use of Redis replication groups. For information about Redis replication groups and how to create them, see ElastiCache Replication (Redis).

Beginning with Redis version 3.2, ElastiCache Redis supports partitioning your data across multiple node groups, with each node group implementing a replication group. This exercise creates a standalone Redis cluster.

Topics

Document Conventions

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