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    :Release notes for minor versions of proxy nodes

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    :Release notes for minor versions of proxy nodes

    Last Updated:Sep 09, 2024

    Tair occasionally releases minor versions for proxy nodes to provide more features, fix known issues, and improve user experience. This topic describes the release notes for minor versions of proxy nodes.

    View or update the minor version of proxy nodes

    You can view the current minor version of proxy nodes that belong to an instance in the Tair console. For 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 console prevails.

    • After you update the minor version of an instance, the instance information remains unchanged. The information includes the endpoints, data, whitelists, and existing accounts and their corresponding passwords.

    Overview of proxy nodes

    In the cluster and read/write splitting architectures of Tair, proxy nodes are used to route commands, balance loads, and perform failovers. Gaining a solid understanding of how proxy nodes route commands and handle specific commands can help you design more efficient business systems. For more information, see Features of proxy nodes.

    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.

    7.0.x

    Important

    Version 7.x is available only for cloud-native instances.

    Minor version

    Update level

    Release date

    Type

    Description

    7.0.13

    LOW

    2024-08-13

    Feature optimization

    • The #no_loose_sentinel-password-free-access configuration item can be used to enable password-free execution of the SUBSCRIBE command to subscribe to the +switch-master channel. The subscription is limited only to this channel.

    7.0.12

    MEDIUM

    2024-07-24

    Feature optimization

    • The return values of API operations related to TairVector global indexes are optimized.

    • The #no_loose_sentinel-password-free-access configuration item can be used to enable password-free access to Sentinel-related commands.

    Fixed issue

    • The following issue is fixed: Entries cannot be deleted from TairVector global indexes in some scenarios.

    • The following issue is fixed: The SCRIPT EXISTS command returns 0 when the Lua script exists.

    7.0.11

    LOW

    2024-07-04

    Fixed issue

    • The following issue is fixed: Configuration changes may fail after the JSON.SET or GIS.ADD command is run.

    7.0.10

    MEDIUM

    2024-06-18

    New feature

    • The TairVector global index feature is available.

    Feature optimization

    • The time required to recover from master-replica synchronization failures is shortened to reduce the impact of the failures.

    Fixed issue

    • The issue that the query results in the TFT.MSEARCH command output are not sorted correctly is fixed.

    • The following issue is fixed: When the number of keys of a single Redis or Tair shard is greater than 2^24, the SCAN command may fail to correctly return all matching keys.

    7.0.9

    MEDIUM

    2024-04-08

    Feature optimization

    • REdis Serialization Protocol 2 (RESP2) and RESP3 are supported. You can use the HELLO command to switch between the protocols. However, to use the command, you must set the hello_enabled parameter to 1 in the configuration settings of the instance.

    • The INFO command can return the pubsub_clients and tracking_clients fields. This optimization requires the instance to be compatible with Redis 6.0 or later.

    Fixed issue

    • The following issue is fixed: When the amount of response data being sent over an SSL or Transport Layer Security (TLS) connection is large enough to fill up the socket buffer, the connection may be closed.

    7.0.8

    MEDIUM

    2024-02-09

    Fixed issue

    • The following issue is fixed: Consecutive SELECT commands within a transaction or SELECT commands at the end of a transaction can cause exceptions.

    • The following issue is fixed: Exceptions occur at a low probability when you use the query cache feature to cache query results for hotkeys.

    • The following issue is fixed: Requests sent over TLS or SSL connections may time out.

    7.0.7

    LOW

    2023-12-15

    Feature optimization

    • The time required to recover from failures is shortened. Services can be quickly restored in the event of a database failure.

    • When a blocking event occurs within a database connection, the response time (RT) for subsequent requests made over the same connection is optimized, preventing these requests from being incorrectly logged as slow queries.

    • The TFT.EXPLAINSCORE command of TairSearch is supported.

    7.0.6

    LOW

    2023-09-01

    Feature optimization

    • The CPU consumption of logging threads is reduced.

    7.0.5

    MEDIUM

    2023-08-29

    Fixed issue

    • The following issue is fixed: Specific write commands of TairVector may be forwarded to read replicas in a read/write splitting instance.

    • The following issue is fixed: ECHO commands are counted as write traffic.

    7.0.4

    LOW

    2023-08-09

    New feature

    • TairVector commands are available for DRAM-based instances of Tair V23.8.0.0 that are compatible with Redis 6.0.

    7.0.3

    MEDIUM

    2023-07-10

    Feature optimization

    • The number of connections required to handle transaction requests is decreased. When you issue transaction requests to your Tair instance without using the SELECT or WATCH command, multiple requests share the same connection.

    Fixed issue

    • The following issue is fixed: When multiple SELECT commands are run in a transaction request, the subsequent non-transactional requests that use the same connection may select incorrect databases.

    7.0.2

    MEDIUM

    2023-05-11

    New feature

    • The TR.BITOP and TR.BITOPCARD commands are supported for keys that reside across slots.

    • The following information is added to the outputs of the INFO and IINFO commands for a persistent memory-optimized instance: maxpmem (the maximum persistent memory of the instance) and used_pmem (the persistent memory usage). Unit: bytes.

    • More than seven nested layers are supported for a response over RESP.

    Feature optimization

    • The limits of the proxy mode on the syntax of Lua scripts are optimized.

    7.0.1

    MEDIUM

    2023-04-11

    New feature

    • Timed-out read requests can be automatically forwarded to other replica nodes.

    • TLS 1.3 is supported.

    • The TFT.ANALYZER and TFT.EXPLAINCOST commands of TairSearch are supported.

    • Command outputs are changed from the encapsulated results on proxy nodes to the execution results from databases.

    • The computing logic of channels upon incremental subscription is optimized to reduce CPU utilization.

    Fixed issue

    • The issue concerning a superfluous space at the end of one-line audit logs is fixed.

    • The issue concerning memory leaks that may occur when the client uses an incorrect protocol is fixed.

    7.0.0

    MEDIUM

    2023-03-09

    New feature

    • Commands of Redis 6.2 and 7.0 are supported.

    • The TFT.ANALYZER command of TairSearch is supported.

    6.8.x

    Minor version

    Update level

    Release date

    Type

    Description

    6.8.21

    MEDIUM

    2024-07-23

    Fixed issue

    • The following issue is fixed: Configuration changes may fail after the JSON.SET or GIS.ADD command is run.

    • The following issue is fixed: The SCRIPT EXISTS command returns 0 when the Lua script exists.

    6.8.20

    MEDIUM

    2024-06-24

    New feature

    • The compatibility between components is optimized.

    6.8.19

    MEDIUM

    2024-06-04

    Feature optimization

    • The time required to recover from master-replica synchronization failures is shortened to reduce the impact of the failures.

    Fixed issue

    • The issue that the query results in the TFT.MSEARCH command output are not sorted correctly is fixed.

    • The following issue is fixed: When the number of keys of a single Redis or Tair shard is greater than 2^24, the SCAN command may fail to correctly return all matching keys.

    6.8.18

    MEDIUM

    2024-04-22

    Fixed issue

    • When a connection is being closed, the client can receive pending responses before the connection is completely closed.

    6.8.17

    MEDIUM

    2024-03-28

    Fixed issue

    • The following issue is fixed: When the amount of response data being sent over an SSL or TLS connection is large enough to fill up the socket buffer, the connection may be closed.

    6.8.16

    MEDIUM

    2024-01-26

    Fixed issue

    • The following issue is fixed: Requests sent over SSL or TLS connections may time out.

    6.8.15

    MEDIUM

    2024-01-12

    Fixed issue

    • The following issue is fixed: Consecutive SELECT commands within a transaction or SELECT commands at the end of a transaction can cause exceptions.

    • The following issue is fixed: The query cache feature may function abnormally.

    6.8.14

    MEDIUM

    2023-11-16

    Feature optimization

    • The number of connections required to handle transaction requests is reduced. When you issue transaction requests to your instance without using the SELECT or WATCH command, multiple requests share the same connection.

    • When a blocking event occurs within a database connection, the RT for subsequent requests made over the same connection is optimized, preventing these requests from being incorrectly logged as slow queries.

    • The TFT.EXPLAINSCORE command of TairSearch is supported.

    6.8.13

    MEDIUM

    2023-07-24

    Fixed issue

    • The following issue is fixed: When multiple SELECT commands are run in a transaction request, the subsequent non-transactional requests that use the same connection may select incorrect databases.

    6.8.12

    MEDIUM

    2023-05-17

    New feature

    • The TR.BITOP and TR.BITOPCARD commands are supported for keys that reside across slots.

    Feature optimization

    • The limits of the proxy mode on the syntax of Lua scripts are optimized.

    Fixed issue

    • The issue concerning memory leaks that may occur when the client uses an incorrect protocol is fixed.

    6.8.11

    MEDIUM

    2023-04-04

    New feature

    • TLS 1.3 is supported.

    • The TFT.ANALYZER and TFT.EXPLAINCOST commands of TairSearch are supported.

    Fixed issue

    • The issue concerning a superfluous space at the end of one-line audit logs is fixed.

    6.8.10

    MEDIUM

    2023-01-06

    New feature

    • TairVector is supported.

    Fixed issue

    • The issue that may cause filter aggregation errors in TairSearch is fixed.

    • The following issue is fixed: After the ptod_enabled parameter is set to 1, the IP address of the client in audit logs becomes incorrect.

    6.8.9

    MEDIUM

    2022-12-14

    New feature

    • The OS field is added to the output of the INFO command.

    • The CLIENT KILL user command is supported.

    Fixed issue

    • The issue that may cause the MOVED command to return incomplete data is fixed. This prevents the failure to parse the client protocol.

    6.8.8

    MEDIUM

    2022-11-15

    New feature

    • The BF.INFO command is supported.

    • The EXHSCANUNORDER command of TairHash is supported.

    • The maximum size of an audit log is changed from 4 KB to 2 KB.

    Fixed issue

    • The issue concerning incorrect IP addresses in audit logs of cloud-native instances in proxy mode is fixed.

    6.8.7

    LOW

    2022-08-22

    Feature optimization

    • Stability is enhanced.

    6.8.6

    MEDIUM

    2022-08-16

    New feature

    • Specific TairSearch commands are supported.

    • The authentication in the AUTH user:password format is supported.

    Feature optimization

    • The issue concerning nested empty arrays caused by RESP3 is fixed.

    6.8.4

    MEDIUM

    2022-07-20

    New feature

    • RESP3 can be resolved and forwarded, and the communication mode between proxy nodes and Tair instances can be changed by using the resp_version parameter.

    6.8.2

    MEDIUM

    2022-06-14

    Feature optimization

    • The stability is improved, and specific crashes are fixed.

    6.8.1

    LOW

    2022-04-19

    New feature

    • Specific TairSearch commands are supported.

    • New commands of TairRoaring V2.2 are supported.

    6.8.0

    MEDIUM

    2022-04-01

    New feature

    • Specific TairZset commands are supported.

    • Specific TairRoaring commands are supported.

    • The RC4 encryption algorithm is disabled for SSL certificates.

    Fixed issue

    • The following issue is fixed: After the ptod_enabled parameter is enabled, an exception occurs when the SDIFFSTORE, SINTERSTORE, SUNIONSTORE, ZINTERSTORE, or ZUNIONSTORE command is run.

    • The following issue is fixed: The CROSSSLOT error occurs when the SMOVE command is run.

    6.7.x

    Minor version

    Update level

    Release date

    Type

    Description

    6.7.9

    MEDIUM

    2022-03-05

    Fixed issue

    • The following issue is fixed: \n in the command output is truncated when the DBSIZE or KEYS command is run on instances that have abnormal nodes.

    6.7.8

    MEDIUM

    2022-03-03

    Fixed issue

    • The following issue is fixed: The SCRIPT DEBUG command cannot be used.

    • The following issue is fixed: The output score of the ZINTERSTORE or ZUNIONSTORE command has only six decimal places.

    6.7.7

    LOW

    2022-01-30

    Feature optimization

    • Stability is enhanced.

    6.7.6

    LOW

    2022-01-20

    Feature optimization

    • Stability is enhanced.

    6.7.5

    MEDIUM

    2022-01-10

    Feature optimization

    • The RANDOMKEY command is optimized to retrieve a different random node each time. This way, if the RANDOMKEY command is run multiple times, it does not retrieve the same node repeatedly.

    Fixed issue

    • The following issue is fixed: The aggregations that derive from info commandstats on DRAM-based instances encounter errors.

    6.7.4

    MEDIUM

    2021-12-20

    Feature optimization

    • Stability is enhanced.

    6.7.3

    MEDIUM

    2021-12-15

    Fixed issue

    • The following issue is fixed: After an SSL connection is established for an instance, the first sent request may not receive a response.

    6.7.2

    LOW

    2021-11-30

    Feature optimization

    • Stability is enhanced.

    6.7.1

    MEDIUM

    2021-11-23

    Feature optimization

    • Stability is enhanced.

    6.6.x

    Minor version

    Update level

    Release date

    Type

    Description

    6.6.14

    MEDIUM

    2021-11-01

    Feature optimization

    • The following issue is fixed: In the Elastic Compute Service (ECS) architecture, the ZINTERSTORE and ZUNIONSTORE commands may fail to return responses when the split_multi_key_cmd_as_slot parameter is enabled.

    6.6.13

    MEDIUM

    2021-10-22

    Feature optimization

    • The following issue is fixed: After the proxy query cache feature is enabled, hot upgrades may fail.

    6.6.12

    MEDIUM

    2021-10-12

    Feature optimization

    • Stability is enhanced.

    6.6.11

    MEDIUM

    2021-10-11

    Feature optimization

    • Stability is enhanced.

    6.6.10

    MEDIUM

    2021-09-27

    Fixed issue

    • The following issue is fixed: An error message is returned when an ApsaraDB for Memcache instance processes only read or write requests.

    6.6.9

    MEDIUM

    2021-09-06

    Fixed issue

    • The CVE-2021-3711 and CVE-2021-3712 vulnerabilities are fixed.

    6.6.8

    MEDIUM

    2021-08-30

    Feature optimization

    • Stability is enhanced.

    6.6.7

    MEDIUM

    2021-08-27

    Feature optimization

    • Memory leaks that occur when the statistics feature is enabled are fixed.

    6.6.6

    LOW

    2021-08-13

    Feature optimization

    • Stability is enhanced.

    6.6.5

    LOW

    2021-08-03

    New feature

    • The Memcached gateway mode is supported. This allows you to use the Memcached protocol to forward requests.

    6.6.4

    HIGH

    2021-07-08

    New feature

    • The CLIENT LIST or CLIENT KILL command can be used to query or manage client connections by process.

    Fixed issue

    • The issue that TairZset commands do not support uppercase letters is fixed.

    6.6.3

    MEDIUM

    2021-06-18

    Feature optimization

    • Internal management in cross-zone disaster recovery scenarios is optimized.

    • If the client ip is not in whitelist error message is returned, the IP address of your client is not added to a whitelist of the Tair instance. You can add the IP address of the client contained in the error message to a whitelist of the Tair instance.

    6.6.2

    LOW

    2021-06-08

    New feature

    • More Tair internal commands are available.

    6.6.1

    LOW

    2021-05-26

    New feature

    • The TairZset data structure is added. It allows you to sort score data of the DOUBLE type with respect to different dimensions. This data structure improves the data processing efficiency and is easy to use on the client side because you do not need to encode, decode, or encapsulate data.

    6.6.0

    LOW

    2021-04-28

    New feature

    • The proxy query cache feature is added. After you enable this feature, proxy nodes cache the request and response data of hotkeys. If a proxy node receives a duplicate request within the validity period of cached data, the proxy node directly returns a response to the client without the need to interact with backend data shards. This feature reduces access skew that occurs when a large number of read requests for hotkeys are sent.

    6.5.x

    Minor version

    Update level

    Release date

    Type

    Description

    6.5.9

    HIGH

    2021-04-21

    Fixed issue

    • The following issue is fixed: Infinite loops occur when the commands used to manage multiple keys are run in special scenarios.

    6.5.8

    HIGH

    2021-04-16

    Fixed issue

    • The following issue that occurs in 6.5.5 is fixed: Requests are not received in order when multiple databases are requested. This minor version is a special version released based on 6.5.5.

    6.5.7

    HIGH

    2021-04-16

    Fixed issue

    • The following issue is fixed: Requests are not received in order when multiple databases are requested.

    6.5.6

    MEDIUM

    2021-04-09

    New feature

    • The maximum number of data shards supported by the SCAN command increases from 256 to 1,024.

    • If the slots of the channels to which clients subscribe are migrated, proxy nodes close the client connections and reconnect to the clients. This ensures data consistency.

    Feature optimization

    Proxy command processing is optimized. The following section describes the optimization:

    • Requests are resent to the address specified by the MOVED command when this command is run.

    • Proxy nodes do not route the commands without specified keys to the data shards that have empty slots.

    6.5.5

    HIGH

    2021-03-05

    Fixed issue

    • The following issue is fixed: Memory leaks may occur when distributed hash table (DHT) updates are triggered by master-replica switchovers or configuration changes.

    6.5.4

    HIGH

    2021-02-07

    Fixed issue

    • The following issue is fixed: Memory leaks may occur when clients require a long time to receive responses.

    6.5.3

    HIGH

    2021-01-21

    New feature

    • Variables can be used in the indexes of the KEYS array in Lua scripts.

    Fixed issue

    • The following issue is fixed: Memory leaks occur when the MULTI or BLOCK command is run on a cluster instance that has more than 32 data shards.

    6.5.2

    HIGH

    2021-01-19

    Fixed issue

    • The following issue is fixed: Virtual IP addresses (VIPs) cannot be obtained by using sockets in alb enat mode.

    6.5.1

    LOW

    2021-01-14

    New feature

    • The IP address of the data shard that sent the most recent response can be recorded when slow logs record the commands used to manage multiple keys.

    6.5.0

    HIGH

    2020-12-24

    Fixed issue

    • The following issue is fixed: The system may not respond when the GIS.GETALL command is run.

    6.4.x

    Minor version

    Update level

    Release date

    Type

    Description

    6.4.10

    MEDIUM

    2020-12-01

    Feature optimization

    • The error message returned due to an invalid password is optimized to facilitate your understanding.

    6.4.9

    HIGH

    2020-11-06

    Fixed issue

    • The following issue is fixed: The system does not respond when SSL encryption is enabled in multi-threading mode.

    • The following issue is fixed: The response protocol is incorrect due to channels that contain 0 when the UNSUBSCRIBE command is run.

    6.4.8

    HIGH

    2020-10-21

    Feature optimization

    • Operational logs encode and then record binary requests for large packets, acknowledgment packets, and moved packets to prevent garbled characters for logs.

    Fixed issue

    • The issue that the max_session_processing parameter cannot be dynamically configured is fixed. This parameter specifies the maximum number of pending requests that are allowed per connection. For more information about the parameter, see Parameters that can be configured for Tair instances.

    6.4.7

    MEDIUM

    2020-10-09

    Feature optimization

    • The internal monitoring of proxy nodes is optimized.

    6.4.6

    HIGH

    2020-09-30

    Fixed issue

    • The following issue is fixed: The SLOWLOG command that is run on a standard or cluster instance times out because the node roles are not initialized.

    • The following issue is fixed: The system does not respond because no keys are specified when clients subscribe to __keyspace@0__.

    6.4.5

    LOW

    2020-09-27

    New feature

    • More Tair internal commands are available.

    6.4.3

    HIGH

    2020-09-25

    Feature optimization

    • The special implementation of pipelines on the Jedis client is adapted to optimize the process to disable connections that are beyond the configured connection limit.

    Fixed issue

    • The following issue is fixed: The system incorrectly records slow logs by using the BZPOPMIN and XREAD commands.

    6.4.2

    HIGH

    2020-09-09

    Fixed issue

    • The issue that idle connections are automatically closed after 1 minute is fixed.

    6.4.1

    MEDIUM

    2020-08-25

    New feature

    • The timeout parameter is added. Idle connections are automatically closed after the specified timeout value.

    • Statistics of slow logs on read replicas can be collected. This indicates that the SLOWLOG command is sent to the master node and all read replicas.

    Feature optimization

    • The memory usage of connections supported by the PubSub and MONITOR commands is optimized to prevent a rapid increase in memory usage due to memory fragments.

    • The capabilities of proxy nodes to handle new connections are improved.

    6.4.0

    HIGH

    2020-08-18

    Fixed issue

    • The following issue is fixed: The system does not respond when you call the stat() function before configurations are completed by using a ConfigServer node.

    6.3.x

    Minor version

    Update level

    Release date

    Type

    Description

    6.3.9

    MEDIUM

    2020-08-14

    New feature

    • The IP addresses of clients are recorded in slow logs to facilitate troubleshooting.

    Feature optimization

    • The capabilities of proxy nodes to handle short-lived connections are improved.

    6.3.8

    HIGH

    2020-07-24

    Fixed issue

    • The following issue is fixed: Memory usage increases because the vector::clear() function does not take effect.

    6.3.7

    HIGH

    2020-07-13

    Fixed issue

    • The following issue is fixed: The system may not respond when you establish a connection after SSL encryption is enabled.

    6.3.5

    HIGH

    2020-07-10

    New feature

    • Binary data in audit logs is encoded to improve log readability.

    • The no_loose_statistics-ip-enable, no_loose_statistics-keys, and no_loose_statistics-cmds parameters are added. You can configure the parameters to collect statistics on specific IP addresses, keys, and commands. For more information, see Parameters that can be configured for Tair instances.

    Fixed issue

    • The following issue is fixed: After a connection is closed, the system may not respond when the CheckExceedLimitAndClose command is run.

    • The issue that the SSL encryption feature cannot be enabled is fixed.

    6.3.4

    HIGH

    2020-05-21

    Fixed issue

    • The following issue is fixed: The system may not respond to subsequent requests due to empty packets such as \r\n.