Documentation history
API version: 2015-02-02
Latest documentation update: January 18, 2023
The following table describes important changes in each release of the ElastiCache for Memcached User Guide after March 2018. For notification about updates to this documentation, you can subscribe to the RSS feed.
Recent ElastiCache for Memcached Updates
| Change | Description | Date |
|---|---|---|
Support for ElastiCache for Memcached 1.6.17 | ElastiCache for Memcached now supports Memcached 1.6.17.
It includes cumulative bug fixes from version Memcached
1.6.12 | January 18, 2023 |
ElastiCache for Memcached now supports IPV6 | ElastiCache supports the Internet Protocol versions 4 and 6 (IPv4 and IPv6), allowing you to configure your cluster
to accept only IPv4 connections, only IPv6 connections or both IPv4 and IPv6 connections (dual-stack).
IPv6 is supported for workloads using Memcached engine version 1.6.6 onward on all instances built on the Nitro system | November 7, 2022 |
ElastiCache for Memcached now supports in-transit encryption | In-transit encryption is an optional feature that allows you to increase the security of your data at its most vulnerable points – when it is in transit from one location to another. It is supported on Memcached versions 1.6.12 and later. For more information, see ElastiCache in-transit encryption (TLS). | May 26, 2022 |
ElastiCache now supports PrivateLink | AWS PrivateLink allows you to privately access ElastiCache API operations without an internet gateway, NAT device, VPN connection, or AWS Direct Connect connection. For more information, see Amazon ElastiCache API and interface VPC endpoints (AWS PrivateLink) for Redis or Amazon ElastiCache API and interface VPC endpoints (AWS PrivateLink) for Memcached. | January 24, 2022 |
Support for tagging resources and condition keys | ElastiCache now supports tagging to help you manage your clusters and other ElastiCache resources. For more information, see Tagging your ElastiCache resources. ElastiCache also introduces support for condition keys. You can specify conditions that determine how an IAM policy takes effect. For more information, see Using condition keys. | April 7, 2021 |
Support for Memcached 1.6.6. | ElastiCache for Memcached now supports Memcached 1.6.6. It includes cumulative bug fixes from versions Memcached 1.5.16. For more information, see Memcached Version 1.6.6. | November 12, 2020 |
ElastiCache is now available on AWS Outposts | AWS Outposts | October 8, 2020 |
ElastiCache now supports Local Zones | A Local Zone is an extension of an AWS Region that is geographically close to your users. You can extend any virtual private cloud (VPC) from a parent AWS Region into Local Zones by creating a new subnet and assigning it to a Local Zone. For more information, see Using Local Zones. | September 25, 2020 |
ElastiCache now supports resource-level permissions | You can now restrict the scope of a user's permissions by specifying ElastiCache resources in an AWS Identity and Access Management (IAM) policy. For more information, see Resource-level permissions. | August 12, 2020 |
ElastiCache now supports auto-update of ElastiCache clusters | Amazon ElastiCache now supports auto-update of ElastiCache clusters after the "recommended apply by date" of service update has passed. ElastiCache uses your maintenance window to schedule the automatic update of applicable clusters. For more information, see Self-service updates. | May 13, 2020 |
Amazon ElastiCache now supports T3-Standard cache nodes | You can now launch the next generation general-purpose burstable T3-Standard cache nodes in Amazon ElastiCache. Amazon EC2’s T3-Standard instances provide a baseline level of CPU performance with the ability to burst CPU usage at any time until the accrued credits are exhausted. For more information, see Supported Node Types. | November 12, 2019 |
ElastiCache for Memcached now allows users to apply service updates on their own schedule | With this feature, you can choose to apply available service updates at a time of your choosing and not just during maintenance windows. This will minimize service interruptions, particularly during peak business flows, and help ensure you remain compliant with security updates. For more information, see Self-Service Updates in Amazon ElastiCache. | October 9, 2019 |
ElastiCache for Memcached now supports Memcached 1.5.16.
It includes cumulative bug fixes from versions Memcached
1.5.14 | September 6, 2019 | |
ElastiCache Standard Reserved Instance offerings: Partial Upfront, All Upfront and No Upfront. | Reserved Instances give you the flexibility to reserve an Amazon ElastiCache instance for a one- or three-year term based on an instance type and AWS Region. For more information, see Managing Costs with Reserved Nodes. | January 18, 2019 |
ElastiCache for Memcached now supports Memcached 1.5.10. It includes support for the no_modern and inline_ascii_resp parameters. For more information, see Memcached Version 1.5.10. | November 14, 2018 | |
User Guide restructure | The single ElastiCache User Guide is now restructured so that there are separate user guides for Redis (ElastiCache for Redis User Guide) and for Memcached (ElastiCache for Memcached User Guide). The documentation structure in the AWS CLI Command Reference: elasticache section and the Amazon ElastiCache API Reference remain unchanged. | April 20, 2018 |
The following table describes the important changes to the ElastiCache for Memcached User Guide before March 2018.
| Change | Description | Date Changed |
|---|---|---|
| Support for Asia Pacific (Osaka-local) Region. |
ElastiCache added support for the Asia Pacific (Osaka-local) Region. The Asia Pacific (Osaka) Region currently supports a single Availability Zone and is by invitation only. For more information, see the following: |
February 12, 2018 |
| Support for EU (Paris). |
ElastiCache added support for the EU (Paris) Region. For more information, see the following: |
December 18, 2017 |
| Support for China (Ningxia) Region | Amazon ElastiCache added support for China (Ningxia) Region. For more information, see the following: |
December 11, 2017 |
| Support for Service Linked Roles |
This release of ElastiCache added support for Service Linked Roles (SLR). For more information, see the following: |
December 7, 2017 |
| Support for R4 node types |
This release of ElastiCache added support R4 node types in all AWS Regions supported by ElastiCache. You can purchase R4 node types as On-Demand or as Reserved Cache Nodes. For more information, see the following: |
November 20, 2017 |
| Connection patterns topic |
ElastiCache documentation adds a topic covering various patterns for accessing an ElastiCache cluster in an Amazon VPC. For more information, see Access Patterns for Accessing an ElastiCache Cluster in an Amazon VPC in the ElastiCache User Guide. |
April 24, 2017 |
| Support for Memcached 1.4.34 |
ElastiCache adds support Memcached version 1.4.34, which incorporates a number of fixes to earlier Memcached versions. For more information, see Memcached 1.4.34 Release Notes |
April 10, 2017 |
| Support for Memcached 1.4.33 |
ElastiCache adds support for Memcached version 1.4.33. For more information, see the following: |
December 20, 2016 |
| Support for EU West (London) Region |
ElastiCache adds support for EU (London) Region. Only node types T2 and M4 are currently supported. For more information, see the following: |
December 13, 2016 |
| Support for Canada (Montreal) Region |
ElastiCache adds support for the Canada (Montreal) Region. Only node type M4 and T2 are currently supported in this AWS Region. For more information, see the following: |
December 8, 2016 |
| Support for M4 and R3 node types |
ElastiCache adds support for R3 and M4 node types in South America (São Paulo) Region and M4 node types in China (Beijing) Region. For more information, see the following: |
November 1, 2016 |
| US East 2 (Ohio) Region support |
ElastiCache adds support for the US East (Ohio) Region (us-east-2) with M4, T2, and R3 node types. For more information, see the following: |
October 17, 2016 |
| M4 node type support |
ElastiCache adds support for the M4 family of node types in most AWS Regions supported by ElastiCache. You can purchase M4 node types as On-Demand or as Reserved Cache Nodes. For more information, see the following: |
August 3, 2016 |
| Mumbai Region support |
ElastiCache adds support for the Asia Pacific (Mumbai) Region. For more information, see the following: |
June 27, 2016 |
| Support for R3 node types |
ElastiCache adds support for R3 node types in the China (Beijing) Region and South America (São Paulo) Region. For more information, see Supported node types. |
March 16, 2016 |
| Accessing ElastiCache using a Lambda function |
Added a tutorial on configuring a Lambda function to access ElastiCache in an Amazon VPC. For more information, see ElastiCache tutorials and videos. |
February 12, 2016 |
| Support for Asia Pacific (Seoul) Region | ElastiCache adds support for the Asia Pacific (Seoul) (ap-northeast-2) Region with t2, m3, and r3 node types. |
January 6, 2016 |
| Support for Memcached 1.4.28. |
ElastiCache adds support for Memcached version 1.4.24 and Memcached improvements since version
1.4.14. This release adds support for least recently used (LRU) cache
management as a background task, choice of jenkins
or murmur3 as your hashing algorithm, new commands,
and miscellaneous bug fixes.
For more information, see Memcached release notes |
August 27, 2015 |
| Support for Memcached Auto Discovery using PHP 5.6 | This release of Amazon ElastiCache adds support for Memcached Auto Discovery client for PHP version 5.6. For more information, see Compiling the source code for the ElastiCache cluster client for PHP. | July 29, 2015 |
| New topic: Accessing ElastiCache from outside AWS |
Added new topic on how to access ElastiCache resources from outside AWS. For more information, see Accessing ElastiCache resources from outside AWS. |
July 9, 2015 |
| Node replacement messages added |
ElastiCache adds three messages pertaining to scheduled node replacement, ElastiCache:NodeReplacementScheduled, ElastiCache:NodeReplacementRescheduled, and ElastiCache:NodeReplacementCanceled. For more information and actions you can take when a node is scheduled for replacement, see ElastiCache's Event Notifications and Amazon SNS. |
June 11, 2015 |
| Support for cost allocation tags | ElastiCache adds support for cost allocation tags. For more information, see Monitoring costs with cost allocation tags. |
February 9, 2015 |
| Support for AWS GovCloud (US-West) Region | ElastiCache adds support for the AWS GovCloud (US-West) (us-gov-west-1) Region. |
January 29, 2015 |
| Support for Europe (Frankfurt) Region | ElastiCache adds support for the Europe (Frankfurt) (eu-central-1) Region. |
January 19, 2015 |
|
AWS CloudTrail logging of API calls supported |
ElastiCache adds support for using AWS CloudTrail to log all ElastiCache API calls. For more information, see Logging Amazon ElastiCache API calls with AWS CloudTrail. |
September 15, 2014 |
New instance sizes supported |
ElastiCache adds support for additional General Purpose (T2) instances. For more information, see Configuring engine parameters using parameter groups. |
September 11, 2014 |
| Flexible node placement supported for Memcached | ElastiCache adds support for creating Memcached nodes across multiple Availability Zones. For more information, see Step 2: Create a cluster. |
July 23, 2014 |
| New instance sizes supported |
ElastiCache adds support for additional General Purpose (M3) instances and Memory Optimized (R3) instances. For more information, see Configuring engine parameters using parameter groups. |
July 1, 2014 |
| PHP auto discovery |
Added support for PHP version 5.5 auto discovery. For more information, see Installing the ElastiCache cluster client for PHP. |
May 13, 2014 |
|
Support for default Amazon Virtual Private Cloud (VPC) |
In this release, ElastiCache is fully integrated with Amazon Virtual Private Cloud (VPC). For new customers, cache clusters are created in an Amazon VPC by default. For more information, see Amazon VPCs and ElastiCache security. |
January 8, 2013 |
|
PHP support for cache node auto discovery |
The initial release of cache node auto discovery provided support for Java programs. In this release, ElastiCache brings cache node auto discovery support to PHP. |
January 2, 2013 |
|
Support for Amazon Virtual Private Cloud (VPC) |
In this release, ElastiCache clusters can be launched in Amazon Virtual Private Cloud (VPC). By default, new customers' cache clusters are created in an Amazon VPC automatically; existing customers can migrate to Amazon VPC at their own pace. For more information, see Amazon VPCs and ElastiCache security. |
December 20, 2012 |
|
Cache node auto discovery and new cache engine version |
ElastiCache provides cache node auto discovery—the ability for client programs to automatically determine all of the cache nodes in a cluster, and to initiate and maintain connections to all of these nodes. This release also offers a new cache engine version: Memcached version 1.4.14. This new cache engine provides enhanced slab rebalancing capability, significant performance and scalability improvements, and several bug fixes. There are several new cache parameters that can be configured. For more information, see Configuring engine parameters using parameter groups. |
November 28, 2012 |
|
New cache node types |
This release provides four additional cache node types. |
November 13, 2012 |
|
Reserved cache nodes |
This release adds support for reserved cache nodes. |
April 5, 2012 |
|
New guide |
This is the first release of Amazon ElastiCache User Guide. |
August 22, 2011 |
