Memorystore for Redis is backed by open-source Redis software. Memorystore for Redis supports Redis versions 3.2, 4.0, 5.0, 6.x, 7.0, and 7.2. The default version is 7.2.
You can find out which version your instance uses by viewing details about the instance. You can also upgrade the version of an instance to any newer version. For example, you can upgrade from version 3.2 to 7.2. For a history of Memorystore for Redis product updates, see the Release notes.
Version support policy
Memorystore for Redis supports one patch version for every major OSS Redis version that's listed in the Current versions section of this page. During maintenance periods, the patch is kept up to date.
Memorystore for Redis monitors for any critical patches that it needs to apply to your instance. Memorystore for Redis rolls out critical security patches outside of the regular maintenance period. For more information, see About maintenance.
Current versions
This table shows the supported Redis versions, the patch levels for these versions, and when the versions were last updated:
| Redis major version | Patch level | Last update |
|---|---|---|
| 7.2 | 7.2.0 | February 29, 2024 |
| 7.0 | 7.0.12 | July 17, 2023 |
| 6.x | 6.2.13 | May 9, 2022 |
| 5.0 | 5.0.14 | May 09, 2022 |
| 4.0 | 4.0.14 | June 17, 2019 |
| 3.2 | 3.2.13 | June 21, 2018 |
Redis version 7.2
The following table provides information about the vector search feature for Redis version 7.2:
| Feature | Description | Supported in Memorystore for Redis |
|---|---|---|
| Vector search | Redis version 7.2 introduces vector data storage and vector data search. These capabilities integrate with the LangChain framework. For more information, see Vector search for generative AI applications. | Yes |
Redis version 7.0
The following table outlines Memorystore for Redis support of some major features introduced by OSS Redis version 7.0.
In addition to the features listed in this section, instances that run Redis version 7.0 with in-transit encryption see improved performance.
| Feature | Description | Supported in Memorystore for Redis |
|---|---|---|
| Redis functions | Redis 7.0 introduces Redis functions, which provides improved Lua
script capabilities on the Redis server. Before version 7.0, to use Lua
scripts, you needed to use the EVAL command. Redis functions
provides simplified and optimized scripting. For more information, see
Redis
functions in the Redis documentation. |
Yes |
| Client eviction | Client eviction, added in Redis 7.0, disconnects clients if the total memory used by all client connections exceeds a user-specified limit. For more information about configuring this limit for Memorystore for Redis, see Configure a Redis instance. | Yes |
| Access Control List (ACL) improvements | Redis 7.0 introduces improved ACL functionality. | No |
| Sharded Pub/Sub | Redis 7.0 introduces sharded Pub/Sub. | No |
| Multi-part Append-only File (AOF) persistence | Redis 7.0 introduces multi-part AOF persistence. | No |
| Redis modules | You can use Redis 7.0 to write modules that can extend Redis' functionalities and implement new data types. | No |
Redis version 6.x
The following table outlines Memorystore for Redis support of some major features introduced by OSS Redis version 6.x:
| Feature | Description | Supported in Memorystore for Redis |
|---|---|---|
| Threaded I/O | With Redis 6.x, if multiple vCPUs are available, then some I/O operations can run in parallel. Memorystore for Redis leverages the optimal number of I/O threads for a configured capacity tier automatically. Starting with the M3 capacity tier, additional I/O threads are utilized, typically resulting in an improvement in query throughput performance. | Yes |
| Longest common subsequence (LCS) command | The LCS command, supported from Redis version 6.x, lets users find non-contiguous common elements between strings. | Yes |
| Redis database (RDB) diskless load for replicas | Redis 6.x makes diskless loading available for replicas. This lets a replica load the RDB from the socket instead of the disk, improving performance. For more information, see the Redis 6.0 conf file. | Yes |
| Built-in traffic encryption | Redis 6.0 adds built-in SSL for encrypting traffic. Although Memorystore for Redis doesn't support this feature for OSS Redis version 6.0, Memorystore for Redis offers its own in-transit encryption. | No |
| Access control lists (ACLs) | Redis ACLs let you restrict the users and actions that interact with the Redis instance. | No |
Redis version 5.0
The following table outlines Memorystore for Redis support of some major features introduced by OSS Redis version 5.0:
| Feature | Description | Supported in Memorystore for Redis |
|---|---|---|
| Redis streams | Redis 5.0 introduces the streams
data structure. Streams support the List functionality, such as
XADD and
XDEL. Streams
also introduce the concept of consumer groups, which let
multiple clients consume different portions of the stream.
|
Yes, through the stream-node-max-bytes and
stream-node-max-entries configuration
parameters. |
| Sorted set commands | Redis 5.0 introduces the following sorted set commands: ZPOPMAX, ZPOPMIN, BZPOPMAX,
and BZPOPMIN.
These commands push and pop the highest or lowest values stored in your
sorted set. |
Yes |
Redis version 4.0
The following table outlines Memorystore for Redis support of some major features introduced by OSS Redis version 4.0:
| Feature | Description | Supported in Memorystore for Redis |
|---|---|---|
| Cache eviction improvements | Supports the Least Frequently Used (LFU) eviction policy. For more information, see Eviction policy in the Redis documentation. | Yes, through the allkeys-lfu and volatile-lfu
maxmemory
policies. |
| Active defragmentation | Introduces the ability to defragment memory while Redis is running. | Yes, through the activedefrag configuration
parameter. |