Amazon ElastiCache User Guide Elasti Cache

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Amazon ElastiCache
Table of Contents
What Is Amazon ElastiCache?
- See Also
- When Should I Use ElastiCache?
- Amazon ElastiCache Resources
- ElastiCache Tutorial Videos
  - Introductory Video Tutorials
  - Advanced Video Tutorials
- ElastiCache Components & Features
- Accessing Amazon ElastiCache
- Managing ElastiCache
  - Means of Managing ElastiCache
Getting Started with Amazon ElastiCache
- Step 1: Create an AWS Account [One time]
- Step 2: Launch a Cluster
- Step 3: View Cluster Details [Optional]
- Step 4: Authorize Access
  - You Launched Your Cluster into EC2-VPC
  - You Launched Your Cluster into EC2-Classic
- Step 5: Connect to a Cluster's Node
- Step 6: Delete Your Cluster [Avoid Additional Charges]
- Where Do I Go From Here?
Engines and Versions
- Selecting an Engine: Memcached or Redis
- Determine Available Engine Versions
- Comparing Memcached Versions
- Comparing Redis Versions
- Upgrading Cache Engine Versions
- Maintenance Window
Selecting Regions and Availability Zones
- Locating Your Redis Read Replicas and Memcached Nodes
- Supported Regions & Endpoints
Finding Your ElastiCache Endpoints
- Finding the Endpoints for a Memcached Cluster (Console)
- Finding the Endpoint for a Redis Cluster (Console)
- Finding the Endpoints for a Redis Replication Group (Console)
- Finding Endpoints (AWS CLI)
  - Finding Endpoints for Nodes and Clusters (AWS CLI)
  - Finding the Endpoints for Replication Groups (AWS CLI)
- Finding the Endpoints (ElastiCache API)
  - Finding Endpoints for Nodes and Clusters (ElastiCache API)
  - Finding Endpoints for Replication Groups (ElastiCache API)
Best Practices for Implementing Amazon ElastiCache
- Ensuring You Have Sufficient Memory to Create a Redis Snapshot
  - Background Write Process and Memory Usage
  - Avoiding Running Out of Memory When Executing a Background Write
- Mitigating Out-of-Disk-Space Issues When Using Redis AOF
  - Enabling Redis Multi-AZ as a Better Approach to Fault Tolerance
- Mitigating Failures
- Configuring Your ElastiCache Client for Efficient Load Balancing
Amazon ElastiCache Error Messages
Caching Strategies
- Lazy Loading
- Write Through
  - Advantages and Disadvantages of Write Through
  - Write Through Code
- Adding TTL
  - Code Example
- Related Topics
ElastiCache Nodes
- Selecting Your Node Size
  - Selecting Your Memcached Node Size
  - Selecting Your Redis Node Size
- ElastiCache Reserved Nodes
- Supported Node Types
- Actions You Can Take When a Node is Scheduled for Replacement
  - Memcached
  - Redis
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
- ElastiCache Clients with Auto Discovery
  - Installing & Compiling Cluster Clients
  - Configuring ElastiCache Clients
ElastiCache Clusters
- Memcached Versions
- Redis Versions
- Other ElastiCache Cluster Operations
- Creating a Cluster
- Viewing a Cluster's Details
- Modifying an ElastiCache Cache 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
  - Canceling Pending Add or Delete Node Operations (Console)
- Deleting a Cluster
Scaling
- Scaling Memcached
  - Scaling Memcached Horizontally
  - Scaling Memcached Vertically
- Scaling Standalone Redis Cache Clusters
  - Scaling Standalone Redis Cache Clusters Up
  - Scaling Standalone Redis Cache Clusters Down
- Scaling Redis Replication Groups
ElastiCache Replication (Redis)
- Redis Replication: Differences by Engine Version
  - Redis Version 2.8.22 and Later
  - Redis Versions Prior to 2.8.22
- Redis Replication Groups
- Replication with Multi-AZ and Automatic Failover (Redis)
- Creating a Redis Replication Group
  - Creating a Replication Group When You Have an Available Redis Cache Cluster
  - Creating a Replication Group Without an Available Redis Cache Cluster
- Finding Replication Group Endpoints
- Modifying a Replication Group
- Deleting a Replication Group
- Adding a Read Replica to a Replication Group
- Promoting a Read-Replica to Primary
- Deleting a Read Replica
ElastiCache Backup & Restore (Redis)
- Constraints
- Costs
- Performance Impact of Backups
  - Backups when running Redis 2.8.22 and later
  - Backups when running Redis versions prior to 2.8.22
- Scheduling Automatic Snapshots
- Taking Manual Snapshots
- Taking a Final Snapshot
- Displaying a List of Snapshots
- Copying a Snapshot
- Exporting a Snapshot
- Restoring From a Snapshot
- Using a Snapshot to Seed a Cluster
- Tagging Snapshots
- Deleting a Snapshot
- Redis Append Only Files (AOF)
Cache Security Groups [EC2-Classic]
- Creating a Cache Security Group
- Listing Available Cache Security Groups
- Viewing a Cache Security Group
- Authorizing Network Access to an Amazon EC2 Security Group
Parameters and Parameter Groups
- 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 Cache Subnet Group
- Assigning a Cache Subnet Group to a Cache Cluster
- Modifying a Cache Subnet Group
- Deleting a Subnet Group
Amazon Virtual Private Cloud (Amazon VPC) with ElastiCache
- ElastiCache and Amazon VPC
- Creating a Virtual Private Cloud (VPC)
  - Creating an Amazon VPC (Console)
- Creating a Cache Subnet Group
- Creating a Cache Cluster in an Amazon VPC
  - Creating a Cache Cluster in an Amazon VPC (Console)
- Connecting to a Cache Cluster Running in an Amazon VPC
Security for Amazon ElastiCache
- ElastiCache and Security Groups
  - Amazon Virtual Private Cloud: Amazon VPC Security Groups
  - Amazon EC2-Classic: ElastiCache Security Groups
- Authentication and Access Control for Amazon ElastiCache
Accessing ElastiCache Resources from Outside AWS
- Requirements
- Considerations
- Limitations
- How to Access ElastiCache Resources from Outside AWS
- See also
Monitoring Usage, Events, and Costs
- Monitoring Use with CloudWatch Metrics
- Monitoring ElastiCache Events
- Monitoring Costs with Cost Allocation Tags
Using the ElastiCache API
- Using the Query API
  - Query Parameters
  - Query Request Authentication
- Available Libraries
- Troubleshooting Applications
  - Retrieving Errors
  - Troubleshooting Tips
- Logging Amazon ElastiCache API Calls Using AWS CloudTrail
  - ElastiCache Information in CloudTrail
  - Deciphering ElastiCache Log File Entries
ElastiCache Turorials
Document History
AWS Glossary

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