Release notes for minor versions of ApsaraDB for Redis Community Edition - ApsaraDB for Redis

Alibaba Cloud releases new minor versions of ApsaraDB for Redis from time to time to provide more features, fix known issues, and improve user experience. This topic describes the release notes for minor versions of ApsaraDB for Redis Community Edition. We recommend that you update minor versions of instances during off-peak hours.

ApsaraDB for Redis Community Edition instances can run Redis 7.0, 6.0, 5.0, 4.0, or earlier.

Important

This topic includes only release notes for minor versions of ApsaraDB for Redis Community Edition instances. For information about the release notes for minor versions of ApsaraDB for Redis Enhanced Edition (Tair) instances, including DRAM-based, persistent memory-optimized, and ESSD/SSD-based instances, see Release notes for Tair minor versions.

View or update the minor version of an instance

You can view the current minor version of an instance in the ApsaraDB for Redis console. For more information about the update operations and usage notes, see Update the minor version of an instance.

Important

The system automatically detects the minor version of an instance. If the instance is of the latest minor version, the Minor Version Update button is not displayed or is dimmed.
Minor version updates may differ from region to region. The minor version of an instance displayed in the ApsaraDB for Redis console prevails.

Update levels

LOW: regular updates. LOW-level updates include routine feature updates, such as adding a feature.
MEDIUM: recommended updates. MEDIUM-level updates include optimization of features and modules. LOW-level updates are also included in MEDIUM-level updates.
HIGH: major updates. HIGH-level updates include major updates that ensure stability or security, such as fixing a vulnerability or defect. LOW-level and MEDIUM-level updates are also included in HIGH-level updates.

ApsaraDB for Redis standard instances

V7.0

Minor version	Update level	Release date	Type	Description
7.0.1.8	LOW	2024-05-28	Feature optimization	Monitoring of watched or blocked connections is enhanced. Rehashing-related metrics are added. The real-time hotkey statistics feature is upgraded in several aspects. For example, the exact queries per second (QPS) of a hotkey can be displayed, and statistics about up to 50 hotkeys can be collected at the same time.
7.0.1.8	LOW	2024-05-28	Fixed issue	The following issue is fixed: Collected QPS statistics are incorrect due to the use of shared objects. Shared objects are no longer used after the real-time hotkey statistics feature is enabled.
7.0.1.7	LOW	2024-04-24	Feature optimization	New features and enhancements of open source Redis 7.0.15 are supported. For more information, see Redis 7.0.15 release notes.
7.0.1.6	MEDIUM	2024-03-14	Feature optimization	The INFO STATS command is optimized to include statistics about disconnections caused by exceeding client buffer limits: client_query_buffer_limit_disconnections client_output_buffer_limit_disconnections The threshold for real-time collection of statistics about large keys is added. The default value is 2000. For example, if a key of the String type is 2,000 characters in length, the key is considered a large key. If the number of elements in a key of the List, Set, or Hash type exceeds 2,000, the key is considered a large key.
7.0.1.6	MEDIUM	2024-03-14	Fixed issue	The issue that statistics about large keys of the Stream type are inaccurate is fixed.
7.0.1.5	LOW	2024-01-09	Feature optimization	The efficiency of active expiration is optimized. The pubsub_clients metric is added to the INFO CLIENTS command.
7.0.1.4	HIGH	2023-11-15	Feature optimization	New features and enhancements of open source Redis 7.0.14 are supported. For more information, see Redis 7.0.14 release notes.
7.0.1.4	HIGH	2023-11-15	Security hardening	The CVE-2023-41056 security vulnerability is fixed. The CVE-2023-41053 security vulnerability is fixed.
7.0.1.3	LOW	2023-08-28	Feature optimization	The process of scaling instances is optimized. Cluster instances can be deployed across multiple zones to implement disaster recovery.
7.0.1.2	HIGH	2023-08-01	New feature	Transport Layer Security (TLS) encryption is supported for cluster instances in direct connection mode. The IP passthrough feature is supported for cluster instances in proxy mode. You can use the ptod_enabled parameter to control this feature. The SPUBLISH command can be used to broadcast messages within a shard of a cluster instance.
7.0.1.2	HIGH	2023-08-01	Feature optimization	New features and enhancements of open source Redis 7.0.12 are supported, including multiple performance optimizations and security vulnerability fixes. For example, the CVE-2022-24834 and CVE-2023-36824 security vulnerabilities are fixed. For more information, see Redis 7.0.12 release notes.
7.0.1.1	LOW	2023-07-17	Feature optimization	The master-replica switchover and restart processes for cluster instances are optimized.
7.0.1.0	LOW	2023-04-20	New feature	Cluster and read/write splitting instances are available for purchase. A cluster instance can be scaled without affecting the instance. Statistics about hotkeys are regularly recorded in audit logs for troubleshooting.
7.0.0.6	LOW	2023-01-31	New feature	The Audit Logs feature is supported. The Real-time Key Statistics feature is supported. The Latency Insights feature is supported.
7.0.0.5	LOW	2022-07-21	Feature optimization	New features and enhancements of open source Redis 7.0.4 are supported.
7.0.0.4	LOW	2022-06-20	Feature optimization	New features and enhancements of open source Redis 7.0.2 are supported.
7.0.0.3	LOW	2022-05-27	First release	ApsaraDB for Redis Community Edition V7.0 instances that use cloud disks are available. For more information, see Redis 7.0 release notes.

V6.0

Minor version	Update level	Release date	Type	Description
0.2.10	LOW	2024-05-28	Security hardening	Stability is enhanced.
0.2.9	LOW	2024-05-28	Feature optimization	Monitoring of watched or blocked connections is enhanced. Rehashing-related metrics are added. The real-time hotkey statistics feature is upgraded in several aspects. For example, the exact queries per second (QPS) of a hotkey can be displayed, and statistics about up to 50 hotkeys can be collected at the same time.
0.2.9	LOW	2024-05-28	Fixed issue	The following issue is fixed: Collected QPS statistics are incorrect due to the use of shared objects. Shared objects are no longer used after the real-time hotkey statistics feature is enabled.
0.2.8	LOW	2024-04-24	Feature optimization	New features and enhancements of open source Redis 6.0.20 are supported. For more information, see Redis 6.0.20 release notes.
0.2.7	LOW	2024-03-14	Feature optimization	The INFO STATS command is optimized to include statistics about disconnections caused by exceeding client buffer limits: client_query_buffer_limit_disconnections client_output_buffer_limit_disconnections The threshold for real-time collection of statistics about large keys is added. The default value is 2000. For example, if a key of the String type is 2,000 characters in length, the key is considered a large key. If the number of elements in a key of the List, Set, or Hash type exceeds 2,000, the key is considered a large key.
0.2.6	LOW	2024-01-09	Feature optimization	The efficiency of active expiration is optimized. The pubsub_clients metric is added to the INFO CLIENTS command. The execution efficiency of the CLUSTER NODES and CLUSTER SLOTS commands is optimized.
0.2.5	LOW	2023-08-28	Feature optimization	Statistics about master-replica replication traffic can be collected. You can use the INFO STATS command to separately retrieve the replication traffic statistics.
0.2.4	HIGH	2023-08-21	Feature optimization	TLS encryption is supported for cluster instances in direct connection mode.
0.2.4	HIGH	2023-08-21	Security hardening	The CVE-2022-24834 security vulnerability is fixed.
0.2.3	MEDIUM	2023-07-17	Security hardening	The master-replica switchover and restart processes for cluster instances are optimized.
0.2.1	MEDIUM	2023-06-30	Security hardening	The stability of the cluster architecture is enhanced.
0.2.0	HIGH	2023-04-24	Feature optimization	Statistics about hotkeys are regularly recorded in audit logs for troubleshooting. The ptod_enabled parameter applies to performance monitoring and slow log query.
0.2.0	HIGH	2023-04-24	Security hardening	Several issues related to the scaling of cluster instances in extreme scenarios are fixed.
0.1.24	LOW	2022-11-14	Security hardening	Stability is enhanced.
0.1.23	LOW	2022-09-20	Feature optimization	Delete operations triggered by expiration can be recorded in audit logs. Non-write commands such as PING, AUTH, and SELECT are no longer recorded in audit logs.
0.1.22	LOW	2022-09-13	Feature optimization	When the maximum number of connections that are allowed on a cluster instance is exceeded, the method for handling new connections is optimized.
0.1.21	LOW	2022-08-30	Feature optimization	The process of starting a cluster instance is optimized.
0.1.20	LOW	2022-06-28	Feature optimization	The following issue is fixed: An error may be returned when commands such as ZUNIONSTORE or ZINTERSTORE are run on cluster instances in proxy mode.
0.1.19	LOW	2022-06-22	Feature optimization	Latency histograms are optimized. For more information, see Latency insights.
0.1.19	LOW	2022-06-22	Security hardening	The process of adding or removing data shards to or from a cluster instance is optimized. For more information, see Adjust the number of shards for an instance.
0.1.18	LOW	2022-05-17	Feature optimization	The Errorstats - Selected field returned by the INFO command can be deleted.
0.1.17	LOW	2022-05-10	Feature optimization	The MOVE command is supported by cluster instances.
0.1.16	MEDIUM	2022-04-25	Security hardening	The process of adding or removing data shards to or from a cluster instance is optimized to enhance stability.
0.1.15	LOW	2022-03-24	New feature	Latency histograms are supported. For more information, see Latency insights. Error statistics can be returned by the INFO command.
0.1.14	LOW	2022-02-21	Feature optimization	The READONLY and READWRITE commands are supported. For more information, see Commands supported by ApsaraDB for Redis Community Edition.
0.1.13	LOW	2022-01-14	Feature optimization	A metric is added to monitor the amount of memory occupied by database metadata. The real-time key statistics feature is optimized.
0.1.12	HIGH	2021-10-26	Security hardening	The following issue is fixed to enhance stability: An excessive number of slow logs are generated during configuration changes of cluster instances.
0.1.11	HIGH	2021-10-13	Feature optimization	The autonomy capabilities in implementing imperceptible slot migration during configuration changes of cluster instances are enhanced. The performance of commands such as CLUSTER NODES is optimized. The whitelist feature is optimized.
0.1.10	HIGH	2021-09-06	Feature optimization	Stability is enhanced.
0.1.9	MEDIUM	2021-08-16	Feature optimization	The reliability and stability of imperceptible slot migration are enhanced.
0.1.8	MEDIUM	2021-08-06	Feature optimization	Stability is enhanced.
0.1.7	MEDIUM	2021-08-06	Feature optimization	Stability is enhanced.
0.1.6	MEDIUM	2021-07-19	New feature	New features and enhancements of open source Redis 6.0.14 are supported. For more information, see Redis 6.0 release notes.
0.1.6	MEDIUM	2021-07-19	Feature optimization	The process of deleting source slot data after data migration is complete is optimized to enhance data reliability. Incremental data synchronization during slot data migration is simplified.
0.1.5	MEDIUM	2021-06-04	Feature optimization	Stability is enhanced.
0.1.4	MEDIUM	2021-05-27	Feature optimization	Stability is enhanced.
0.1.3	LOW	2021-05-18	New feature	Statistics about large keys can be collected in real time.
0.1.2	MEDIUM	2021-05-07	Feature optimization	Stability is enhanced.
0.1.1	MEDIUM	2020-11-28	New feature	New features and enhancements of open source Redis 6.0.9 are supported. For more information, see Redis 6.0 release notes. Slots can be migrated without affecting instances. Virtual IP addresses (VIPs) can be obtained over the Internet. This provides better support for clients that use the direct connection mode. For more information, see Enable the direct connection mode.
0.1.1	MEDIUM	2020-11-28	Feature optimization	Health checks for instances are improved to accelerate the switchover between the master and replica nodes when disk jitters occur.
0.0.5	HIGH	2020-08-21	Fixed issue	The issue that statistics about hotkeys are inaccurate is fixed.
0.0.4	HIGH	2020-07-20	Fixed issue	The issue that the settings of specific parameters become invalid after an instance restarts is fixed. The issue that replica nodes are incorrectly flagged in slow logs during data synchronization is fixed.
0.0.3	LOW	2020-06-11	New feature	New features and enhancements of open source Redis 6.0.5 are supported. For more information, see Redis 6.0 release notes. Role information such as `role:master` can be displayed in the Replication part of the INFO command output. This allows Redisson clients to call the role information in specific scenarios. Statistics about QPS of read and write commands can be collected. For more information, see View performance monitoring data.
0.0.2	LOW	2020-06-02	New feature	New features and enhancements of open source Redis 6.0.4 are supported. For more information, see Redis 6.0 release notes.
0.0.1	LOW	2020-05-06	First release	The first minor version of V6.0 is released. This minor version is developed based on open source Redis 6.0.1. For more information, see Redis 6.0 release notes.

V5.0

Minor version	Update level	Release date	Type	Description
5.2.10	LOW	2024-05-28	Security hardening	Stability is enhanced.
5.2.9	LOW	2024-05-28	Feature optimization	Monitoring of watched or blocked connections is enhanced. Rehashing-related metrics are added. The real-time hotkey statistics feature is upgraded in several aspects. For example, the exact queries per second (QPS) of a hotkey can be displayed, and statistics about up to 50 hotkeys can be collected at the same time.
5.2.9	LOW	2024-05-28	Fixed issue	The following issue is fixed: Collected QPS statistics are incorrect due to the use of shared objects. Shared objects are no longer used after the real-time hotkey statistics feature is enabled.
5.2.8	LOW	2024-04-24	Security hardening	Stability is enhanced.
5.2.7	LOW	2024-03-14	Feature optimization	The INFO STATS command is optimized to include statistics about disconnections caused by exceeding client buffer limits: client_query_buffer_limit_disconnections client_output_buffer_limit_disconnections The threshold for real-time collection of statistics about large keys is added. The default value is 2000. For example, if a key of the String type is 2,000 characters in length, the key is considered a large key. If the number of elements in a key of the List, Set, or Hash type exceeds 2,000, the key is considered a large key.
5.2.6	LOW	2024-01-09	Feature optimization	The efficiency of active expiration is optimized. The pubsub_clients metric is added to the INFO CLIENTS command. The execution efficiency of the CLUSTER NODES and CLUSTER SLOTS commands is optimized.
5.2.5	LOW	2023-08-28	Feature optimization	Statistics about master-replica replication traffic can be collected. You can use the INFO STATS command to separately retrieve the replication traffic statistics.
5.2.4	HIGH	2023-08-21	Feature optimization	TLS encryption is supported for cluster instances in direct connection mode.
5.2.4	HIGH	2023-08-21	Security hardening	The CVE-2022-24834 security vulnerability is fixed.
5.2.2	MEDIUM	2023-07-17	Security hardening	The master-replica switchover and restart processes for cluster instances are optimized.
5.2.1	MEDIUM	2023-06-30	Security hardening	The stability of the cluster architecture is enhanced.
5.2.0	HIGH	2023-04-24	Feature optimization	Statistics about hotkeys are regularly recorded in audit logs for troubleshooting. The ptod_enabled parameter applies to performance monitoring and slow log query.
5.2.0	HIGH	2023-04-24	Security hardening	Several issues related to the scaling of cluster instances in extreme scenarios are fixed.
5.1.13	LOW	2022-11-14	Security hardening	Stability is enhanced.
5.1.12	LOW	2022-09-20	Feature optimization	Delete operations triggered by expiration can be recorded in audit logs. Non-write commands such as PING, AUTH, and SELECT are no longer recorded in audit logs.
5.1.11	LOW	2022-09-06	Feature optimization	When the maximum number of connections that are allowed on a cluster instance is exceeded, the method for handling new connections is optimized.
5.1.10	LOW	2022-08-23	Feature optimization	The process of starting a cluster instance is optimized. Latency histograms are optimized.
5.1.9	LOW	2022-06-22	Feature optimization	Latency histograms are optimized. For more information, see Latency insights.
5.1.9	LOW	2022-06-22	Security hardening	The process of adding or removing data shards to or from a cluster instance is optimized. For more information, see Adjust the number of shards for an instance.
5.1.8	LOW	2022-05-17	Feature optimization	The Errorstats - Selected field returned by the INFO command can be deleted.
5.1.7	LOW	2022-05-06	Feature optimization	The MOVE command is supported by cluster instances.
5.1.6	MEDIUM	2022-04-25	Feature optimization	The process of adding or removing data shards to or from a cluster instance is optimized to enhance stability.
5.1.5	LOW	2022-04-13	Feature optimization	Stability is enhanced.
5.1.4	LOW	2022-03-24	New feature	Latency histograms are supported. For more information, see Latency insights. Error statistics can be returned by the INFO command.
5.1.3	LOW	2022-02-21	Feature optimization	The READONLY and READWRITE commands are supported. For more information, see Commands supported by ApsaraDB for Redis Community Edition.
5.1.1	LOW	2022-01-04	Feature optimization	A metric is added to monitor the amount of memory occupied by database metadata.
5.0.9	LOW	2021-12-22	Feature optimization	The real-time key statistics feature is optimized.
5.0.8	LOW	2021-11-15	Feature optimization	A cluster instance can be scaled without affecting the instance. The account names are case-sensitive.
0.5.18	LOW	2022-08-23	Feature optimization	The process of starting a cluster instance is optimized.
0.5.17	HIGH	2022-06-07	Security hardening	Stability is enhanced.
0.5.16	HIGH	2022-05-23	Security hardening	The configuration change stability is improved for cluster instances in direct connection mode.
0.5.15	HIGH	2022-04-25	Security hardening	The following issue is fixed: The migration of large keys may fail during configuration changes of cluster instances in direct connection mode.
0.5.14	LOW	2022-01-04	Feature optimization	A metric is added to monitor the amount of memory occupied by database metadata.
0.5.12	LOW	2021-11-29	Feature optimization	The following issue is fixed: Cluster instances may not be able to restart in specific scenarios.
0.5.11	LOW	2021-11-24	Feature optimization	The following issue is fixed: Statistics about the SPOP command are not collected when the real-time key analysis feature is enabled.
0.5.10	HIGH	2021-10-26	Security hardening	The following issue is fixed to enhance stability: An excessive number of slow logs are generated during configuration changes of cluster instances.
0.5.9	HIGH	2021-10-15	Security hardening	Stability is enhanced.
0.5.8	MEDIUM	2021-10-13	Feature update	The autonomy capabilities in implementing imperceptible slot migration during configuration changes of cluster instances are enhanced.
0.5.7	LOW	2021-08-26	New feature	Statistical data of QPS is classified. Three types of QPS can be calculated: read QPS, write QPS, and other QPS.
0.5.6	HIGH	2021-08-16	Fixed issue	The reliability and stability of imperceptible slot migration are enhanced.
0.5.5	HIGH	2021-08-05	Fixed issue	The following issue is fixed: Configuration changes may fail when the direct connection mode is enabled for cluster instances.
0.5.4	MEDIUM	2021-07-27	Feature update	Stability is enhanced.
0.5.3	MEDIUM	2021-07-21	Feature update	The process of deleting source data after data migration is complete is optimized to enhance data reliability. Incremental data synchronization during data migration is simplified.
0.5.2	HIGH	2021-04-26	Security hardening	The security vulnerabilities of the open source LuaJIT compiler are fixed.
0.5.2	HIGH	2021-04-26	New feature	The migration mechanism for slots is optimized to allow instances that use cloud disks to be scaled without data loss. Statistics about large keys can be collected in real time. VIPs can be obtained over the Internet. This provides better support for private endpoint users.
0.5.0	MEDIUM	2021-03-25	New feature	Slots can be migrated without affecting instances.
0.5.0	MEDIUM	2021-03-25	Feature optimization	A large number of asynchronous client requests can be processed more stably.
0.4.0	MEDIUM	2021-03-09	New feature	Statistics about large keys can be collected in real time. The CONFIG RESETSTAT command is supported. When the `illegal address` error message is returned, the IP address of the client can be included in the error message. An IP address whitelist can be configured for your instance based on the IP address prompt. Figure 1. Sample IP address prompt
0.4.0	MEDIUM	2021-03-09	Feature optimization	Health checks for instances are improved to accelerate the switchover between the master and replica nodes when disk jitters occur.
0.3.10	HIGH	2020-09-25	Fixed issue	The issue that the output of the CLUSTER NODES command is different from that of open source Redis is fixed. Multiple slots are separated by spaces to prevent errors in client parsing.
0.3.9	LOW	2020-07-20	New feature	The security group feature provided by ECS is supported to simplify O&M. To allow ECS instances to access an ApsaraDB for Redis instance, you can add the security groups to which the ECS instances belong to the ApsaraDB for Redis instance. You do not need to manually add the IP addresses of the ECS instances to the whitelists of the ApsaraDB for Redis instance. For more information, see Step 2: Configure whitelists.
0.3.8	HIGH	2020-07-14	Feature optimization	Subcommands of CLIENT UNBLOCK are available.
0.3.8	HIGH	2020-07-14	Fixed issue	The issue that the expiration time is parsed incorrectly when slots are migrated is fixed. Latency flag bits in audit logs are modified to help identify these bits in master and replica audit logs.
0.3.7	HIGH	2020-06-17	Fixed issue	The issue that the returned IP address is unreachable in direct connection mode is fixed.
0.3.6	LOW	2020-06-09	New feature	Role information such as `role:master` can be displayed in the Replication part of the INFO command output. This allows Redisson clients to call the role information in specific scenarios.
0.3.5	LOW	2020-06-05	New feature	Statistics about QPS of read and write commands can be collected. For more information, see View performance monitoring data.
0.3.4	HIGH	2020-04-08	Fixed issue	The issue that the system does not respond when hotkeys are evicted is fixed. The following issue is fixed: The system does not respond due to the use-after-free (UAF) vulnerability when the audit log feature is disabled.
0.3.1	HIGH	2020-02-20	New feature	The audit log feature is supported. This feature allows you to query, analyze, and export logs. For more information, see Enable the audit log feature. The direct connection mode is supported. Clients can bypass proxy nodes and use private endpoints to connect to ApsaraDB for Redis instances. This is similar to the connection to a native Redis cluster. The direct connection mode can reduce communication overheads and the response time of ApsaraDB for Redis. For more information, see Enable the direct connection mode. Both password-free access and Internet access are supported for an ApsaraDB for Redis instance deployed in a virtual private cloud (VPC). To access the instance over the Internet, apply for a public endpoint. For more information, see Enable password-free access. The `oom_err_count` information can be contained in the INFO command output when the actual memory size is greater than the value of the maxmemory parameter.
0.3.1	HIGH	2020-02-20	Fixed issue	The following issue is fixed: The system does not respond because the expiration mechanism is triggered when the RPOPLPUSH command is run with the source and destination keys being the same. The following issue is fixed: Authentication failures occur when instances that are deployed in VPCs are accessed without using passwords.
0.2.0	LOW	2020-01-17	New feature	Statistics about hotkeys can be collected in real time to help identify hotkeys in instances. For more information, see Use the real-time key statistics feature.
0.1.2	LOW	2019-11-26	New feature	Read-only Lua scripts can be executed on read replicas of read/write splitting instances.
Earlier than 0.1.2	N/A	N/A	N/A	These earlier minor versions belong to V5.0. We recommend that you update your instances to the latest minor version.

V4.0

Minor version	Update level	Release date	Type	Description
1.9.17	LOW	2023-11-25	Security hardening	Stability is enhanced.
1.9.16	LOW	2023-08-15	Security hardening	Stability is enhanced.
1.9.15	LOW	2023-05-17	Feature optimization	For cluster instances, you can view the number of connections between proxy nodes and data nodes in the CloudMonitor console.
1.9.14	LOW	2022-11-14	Feature optimization	Statistics collection is optimized.
1.9.13	LOW	2022-08-23	Feature optimization	The process of starting a cluster instance is optimized.
1.9.12	HIGH	2022-06-07	Security hardening	Stability is enhanced.
1.9.10	HIGH	2022-05-23	Security hardening	The configuration change stability is improved for cluster instances in direct connection mode.
1.9.9	HIGH	2022-04-25	Security hardening	Stability is enhanced.
1.9.8	HIGH	2022-04-25	Security hardening	The following issue is fixed: The migration of large keys may fail during configuration changes of cluster instances in direct connection mode.
1.9.6	HIGH	2021-10-15	Security hardening	Stability is enhanced.
1.9.5	LOW	2021-09-13	New feature	Statistical data of QPS is classified. Three types of QPS can be calculated: read QPS, write QPS, and other QPS.
1.9.4	HIGH	2021-08-05	Fixed issue	The following issue is fixed: Configuration changes may fail when the direct connection mode is enabled for cluster instances.
1.9.3	MEDIUM	2021-07-20	Feature update	Stability is enhanced.
1.9.2	HIGH	2021-04-19	Security hardening	The security vulnerabilities of the open source LuaJIT compiler are fixed.
1.9.2	HIGH	2021-04-19	New feature	VIPs can be obtained over the Internet. This provides better support for private endpoint users.
1.9.1	MEDIUM	2021-03-08	Feature optimization	Health checks for instances are improved to accelerate the switchover between the master and replica nodes when disk jitters occur. The capability of memory-intensive instances to run the BGSAVE and REWRITE commands by calling fork() is improved. This prevents long pauses.
1.9.0	LOW	2021-02-22	New feature	When the `illegal address` error message is returned, the IP address of the client can be included in the error message. An IP address whitelist can be configured for your instance based on the IP address prompt. Figure 2. Sample IP address prompt
1.8.8	HIGH	2020-09-25	Fixed issue	The issue that the output of the CLUSTER NODES command is different from that of open source Redis is fixed. Multiple slots are separated by spaces to prevent errors in client parsing.
1.8.7	LOW	2020-07-20	New feature	The security group feature provided by ECS is supported to simplify O&M. To allow ECS instances to access an ApsaraDB for Redis instance, you can add the security groups to which the ECS instances belong to the ApsaraDB for Redis instance. You do not need to manually add the IP addresses of the ECS instances to the whitelists of the ApsaraDB for Redis instance. For more information, see Step 2: Configure whitelists.
1.8.6	HIGH	2020-07-14	Fixed issue	Latency flag bits in audit logs are modified to help identify these bits in master and replica audit logs.
1.8.5	LOW	2020-06-09	New feature	Role information such as `role:master` can be displayed in the Replication part of the INFO command output. This allows Redisson clients to call the role information in specific scenarios.
1.8.4	LOW	2020-06-05	New feature	Statistics about QPS of read and write commands can be collected. For more information, see View performance monitoring data.
1.8.3	HIGH	2020-04-08	Fixed issue	The issue that the system does not respond when hotkeys are evicted is fixed. The following issue is fixed: The system does not respond due to the UAF vulnerability when the audit log feature is disabled.
1.8.1	LOW	2020-02-20	New feature	Both password-free access and Internet access are supported for an ApsaraDB for Redis instance deployed in a VPC. To access the instance over the Internet, apply for a public endpoint. For more information, see Enable password-free access.
1.8.0	HIGH	2020-01-16	New feature	Statistics about hotkeys can be collected in real time to help identify hotkeys in instances. For more information, see Use the real-time key statistics feature.
1.8.0	HIGH	2020-01-16	Fixed issue	In direct connection mode, the output of the INFO command can contain the cluster_enabled information. This cluster_enabled information allows some SDKs to automatically negotiate to enter the cluster mode. For more information, see Enable the direct connection mode.
1.7.1	MEDIUM	2019-11-20	New feature	Read-only Lua scripts can be executed on read replicas of read/write splitting instances. The direct connection mode is supported. Clients can bypass proxy nodes and use private endpoints to connect to ApsaraDB for Redis instances. This is similar to the connection to a native Redis cluster. The direct connection mode can reduce communication overheads and the response time of ApsaraDB for Redis. For more information, see Enable the direct connection mode. The memory statistics of Lua scripts can be contained in the Memory part of the INFO command output.
1.7.1	MEDIUM	2019-11-20	Feature optimization	Audit logs consume less memory.
1.5.8	HIGH	2019-09-23	Fixed issue	The following issue is fixed: The atomicity of the SETEX command is destroyed during two-way synchronization in Global Distributed Cache for Redis links.
1.5.6	HIGH	2019-08-28	New feature	Audit logs can record latency events.
1.5.6	HIGH	2019-08-28	Fixed issue	The following issue is fixed: A switchover may occur between the master and replica nodes due to slow requests when the client issues commands such as KEYS, FLUSHALL, and FLUSHDB.
1.5.4	LOW	2019-07-08	New feature	The audit log feature is supported. This feature allows you to query, analyze, and export logs. For more information, see Enable the audit log feature. Latency statistics during the entire event lifecycle are recorded to help you gain insights into the status of the engine.
1.5.2	HIGH	2019-07-04	Fixed issue	The following issue is fixed: The system does not respond because the expiration mechanism is triggered when the RPOPLPUSH command is run with the source and destination keys being the same.
1.4.0	HIGH	2019-05-15	Fixed issue	The following issue is fixed: A master-replica switchover is triggered when Redis Database (RDB) files or append-only files (AOFs) are loaded onto an instance after the instance restarts.
Earlier than 1.4.0	N/A	N/A	N/A	These earlier minor versions belong to V4.0. We recommend that you update your instances to the latest minor version.

References

For information about the release notes for proxy nodes, see Release notes for minor versions of ApsaraDB for Redis proxy nodes.
For information about the release notes for ApsaraDB for Redis Enhanced Edition (Tair), see Release notes for Tair minor versions.