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图2 多对一数据迁移 场景二:多对一实时同步 实时同步不同于数据迁移,是维持不同业务之间的数据持续性流动,除了可以实现实例级多对一同步(如图3,财务系统、订单系统到报表系统的数据同步)外,还可以通过对象名映射功能,实现库级或者表级数据多对一同步(如图3,财务系统、订单系统中表B的数据到报表系统表
Server 2016 企业版、标准版、Web版 Microsoft SQL Server 2017 企业版、标准版、Web版 Microsoft SQL Server 2019 企业版、标准版、Web版 全量迁移 增量迁移 OBS自建桶 RDS全量备份 实时同步 实时同步是在不同系统之间
全量阶段失败报错,关键字“Unknown collation: 'utf8mb4_0900_ai_ci'” 场景描述 全量迁移或同步期间DRS任务报错,日志提示信息:retry structures failed events=the fail structures are [type
part, or the storage engine doesn't support unique prefix keys” 场景描述 全量迁移或同步期间DRS任务报错,日志提示信息:service DATAMOVE failed, cause by: retry structures
全量阶段失败报错,关键词“Access denied for user *** to database ***” 场景描述 全量迁移或同步期间DRS任务报错,日志提示信息:service DATAMOVE failed, cause by: retry structures failed
全量同步失败报错,关键词“column *** does not exist” 场景描述 全量同步期间DRS任务报错,同步日志界面提示:service DATAMOVE failed, cause by: retry structures failed events=the fail
fail structures are [type=operator, index=2, schema_name=public, object_name=?
全量阶段失败报错,关键词“retry structures failed events”“Table *** doesn't exist” 场景描述 全量迁移期间DRS任务报错,日志提示信息:service DATAMOVE failed, cause by: retry structures
全量阶段失败报错,关键词“extract table structure failed!”
you need (at least one of) the SUPER privilege(s) for this operation” 场景描述 全量迁移期间DRS任务报错,日志提示信息:service DATAMOVE failed, cause by: retry structures
全量或增量阶段失败报错,关键词“temporary file size exceeds temp_file_limit” 场景描述 全量或增量同步期间DRS任务报错,同步日志界面提示:retry structures failed events=the fail structures
the fail structures are [type=table_structure, index=0, schema_name=%s, object_name=%s]reason:[ERROR: permission denied for schema %s] 可能原因 目标库连接账号权限不足
全量阶段失败报错,关键词“Unknown database ***” 场景描述 全量迁移或同步期间DRS任务报错,日志提示信息:service DATAMOVE failed, cause by: retry structures failed events=the fail structures
全量迁移失败报错,关键词“Prematurely reached end of stream” 场景描述 MongoDB->DDS实时迁移场景,全量迁移报错,日志提示信息:service DATAMOVE failed, cause by: Prematurely reached
fail structures are [type=operator, index=2, schema_name=public, object_name=?
全量同步失败报错,关键词“password must not equal user name” 场景描述 全量同步期间DRS任务报错,同步日志界面提示:service DATAMOVE failed, cause by: retry structures failed events
全量或增量阶段失败报错,关键词“memory required is *** MB, maintenance_work_mem is *** MB” 场景描述 全量或增量同步期间DRS任务报错,同步日志界面提示:retry structures failed events=the
全量或增量阶段失败报错,关键词“load database structure failed in source database” 场景描述 全量或增量阶段,DRS迁移或同步任务报错,日志提示信息:service LOGMANAGER failed, cause by: load
=the fail structures are [type=account, index=0, schema_name=mysql, object_name='***']reason:[CANNOT UPDATE USER WITH NULL PASSWORD]。
the --super-read-only option so it cannot execute this statement” 场景描述 全量迁移或同步期间DRS任务报错,日志提示信息:service DATAMOVE failed, cause by: retry structures