Redis Enterprise Software 发行说明 5.4.4（2019 年 6 月）

Redis 企业软件

Redis Enterprise Software （RS） 5.4.4 现已推出。 此版本支持双活 Redis （CRDB） 与 RoF（自动分层）相结合的功能， 支持创建多个模块的 Redis 数据库， 并添加了其他增强功能和错误修复。

概述

按照这些说明从 RS 5.0 及更高版本升级到 RS 5.4.4。 如果您的版本低于 5.0，则必须先升级到版本 5.2（或至少 5.0）。

新功能

具有 RoF 的双活 Redis

RS 5.4.4 允许您使用 Auto Tiering 创建主动-主动 Redis 数据库 （CRDB），并获得地理分布式 Redis 数据库的优势以及使用 Auto Tiering 的显著成本节省。

注意：
您必须选择 Redis 5 作为 Redis 版本才能使用 CRDB 和 RoF。

支持多个模块

RS 5.4.4 支持通过以下任一 GA 模块的组合创建和管理 Redis 数据库：

  • RediSearch （GA）
  • RedisGraph （正式发布）
  • RedisBloom （GA）
  • RedisJSON （正式发布）

要升级具有多个模块的数据库，您可以使用rladmin upgrade命令。

注意：
的rladmin upgrade命令现在要求将 module_args 参数写在引号内。

  • 要仅升级现有数据库中的模块，例如使用 RedisBloom （bf） 和 RedisJSON：

    rladmin upgrade module db_name db1 module_name bf version 10003 module_args "" module_name ReJSON version 10001 module_args ""

  • To upgrade a database with its modules, for example db1 with RediSearch and RedisGraph:

    rladmin upgrade db db1 and module module_name redisearch version 103 module_args "ON_TIMEOUT FAIL NOGC" and module module_name graph version 10016 module_args ""

You can also upgrade the modules with the REST API.

  • To upgrade multiple modules, enter the details of each module in the modules parameter:

    curl -X POST -u "demo@redislabs.com:password" -H "Content-Type: application/json" -d '{"modules":[{"module_name": "ReJSON", "current_module": "<module_uid>", "new_module": "<module_uid>", "new_module_args": "", "current_semantic_version":"1.0.4"}, {"module_name":"ft","current_module":"<module_uid>","new_module": "<module_uid>","current_semantic_version":"1.4.3", "new_module_args":"PARTITIONS AUTO"}], "force_restart":true}' https://127.0.0.1:9443/v1/bdbs/2/modules/upgrade

  • To upgrade a single module, you can either:

    • Enter the details of the module in the modules parameter
    • Enter the details of the module without the modules parameter, as in previous releases

Additional capabilities

  • Support for persistence of AOF every 1 second in Active-Active Redis (CRDB), in addition to AOF every write. We recommend that you use AOF every 1 second for the best performance during the initial CRDB sync of a new replica.
  • NGINX version updated to 1.14.2

Information

Important fixes

  • RS26508 - Fixed redis-cli failure for a specific CRDB data type.
  • RS29191 - Fixed a failure when removing a replica from a CRDB.
  • RS29097 - Fixed a misconfiguration when using SFTP backup and encounter a node failure.
  • RS28286 - Updated SETEX and PSETEX commands output of CRDB to match Redis outputs.
  • RS26984 - Fixed metrics_exporter reports for node and shard level metrics.
  • RS19854 - Fixed uploading a Redis Module so you can upload a Redis Module when the admin console is connected to any node.
  • RS29238 - Improved the compression performance in CRDB.

Known limitations

Upgrade

  • RS 5.4.2 introduced new Active-Active Redis (CRDB) capabilities that improve its compatibility with open source Redis. Now the string data-type in CRDB is implicitly and dynamically typed, just like open source Redis. To use the new capabilities on nodes that are upgraded from version RS 5.4.2 or lower, you must upgrade the CRDB protocol.
  • Before you upgrade a database with RediSearch Module to Redis 5.0, you must upgrade the RediSearch Module to version 1.4.2 or above.
  • Node upgrade fails if the SSL certificates were configured in version 5.0.2 or above by manually updating the certificates on the disk instead of updating them through the API. For assistance with this issue, contact Redis support.
  • We recommend that you test module upgrade commands in a test environment before you upgrade modules in a production environment. The module upgrade arguments are not validated during the upgrade process and incorrect arguments can cause unexpected downtime.
  • Starting from RS 5.4.2, to preserve the current Redis major.minor version during database upgrade you must use the keep_redis_version option instead of keep_current_version.

Subscriptions

  • If a user subscribes to a channel during recovery of a CRDB from AOF, the user receives old messages that are stored in the AOF file.

Cluster API

  • The API for removing a node is updated in RS 5.4.2 or higher. The API call must include json data and the "Content-Type: application/json" header. For example:

    curl -X POST -H "Content-Type: application/json" -i -k -u user@redislabs.com:passsword https://localhost:9443/v1/nodes/3/actions/remove --data "{}"

Redis commands

  • The capability of disabling specific Redis commands does not work on commands specific to Redis Modules.
  • The CLIENT ID command cannot guarantee incremental IDs between clients that connect to different nodes under multi proxy policies.
  • CLIENT UNBLOCK command is not supported in RS 5.4.x
  • Starting from RS 5.4.2 and after upgrading the CRDB, TYPE command for string data-type in CRDBs return "string" (OSS Redis standard).
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