mysql - AWS DMS CDC 无法从 MySQL 复制文本列

Question

我们正在使用 AWS DMS 通过持续复制将数据从 MySQL 复制到 Aurora MySQL。我们设置任务验证以确保源到目标复制成功。其中一个表有一个文本列，它无法验证正在进行的复制。任务在完全加载期间正确复制列，但在持续复制期间，目标列始终为空字符串。

源和目标的架构是相同的。

以下是复制任务的任务设置。

{
    "TargetMetadata": {
        "TargetSchema": "mydb",
        "SupportLobs": true,
        "FullLobMode": true,
        "LobChunkSize": 64,
        "LimitedSizeLobMode": false,
        "LobMaxSize": 0,
        "InlineLobMaxSize": 0,
        "LoadMaxFileSize": 0,
        "ParallelLoadThreads": 0,
        "ParallelLoadBufferSize": 0,
        "BatchApplyEnabled": false,
        "TaskRecoveryTableEnabled": false
    },
    "FullLoadSettings": {
        "TargetTablePrepMode": "DO_NOTHING",
        "CreatePkAfterFullLoad": false,
        "StopTaskCachedChangesApplied": false,
        "StopTaskCachedChangesNotApplied": false,
        "MaxFullLoadSubTasks": 8,
        "TransactionConsistencyTimeout": 600,
        "CommitRate": 10000
    },
    "Logging": {
        "EnableLogging": true,
        "LogComponents": [
            {
                "Id": "SOURCE_UNLOAD",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "SOURCE_CAPTURE",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "TARGET_LOAD",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "TARGET_APPLY",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "TASK_MANAGER",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            }
        ],
        "CloudWatchLogGroup": "dms-tasks-test-dms-replication-instance",
        "CloudWatchLogStream": "dms-task"
    },
    "ControlTablesSettings": {
        "historyTimeslotInMinutes": 5,
        "ControlSchema": "",
        "HistoryTimeslotInMinutes": 5,
        "HistoryTableEnabled": false,
        "SuspendedTablesTableEnabled": false,
        "StatusTableEnabled": false
    },
    "StreamBufferSettings": {
        "StreamBufferCount": 3,
        "StreamBufferSizeInMB": 8,
        "CtrlStreamBufferSizeInMB": 5
    },
    "ChangeProcessingDdlHandlingPolicy": {
        "HandleSourceTableDropped": true,
        "HandleSourceTableTruncated": true,
        "HandleSourceTableAltered": true
    },
    "ErrorBehavior": {
        "DataErrorPolicy": "LOG_ERROR",
        "DataTruncationErrorPolicy": "LOG_ERROR",
        "DataErrorEscalationPolicy": "SUSPEND_TABLE",
        "DataErrorEscalationCount": 50,
        "TableErrorPolicy": "SUSPEND_TABLE",
        "TableErrorEscalationPolicy": "STOP_TASK",
        "TableErrorEscalationCount": 50,
        "RecoverableErrorCount": 0,
        "RecoverableErrorInterval": 5,
        "RecoverableErrorThrottling": true,
        "RecoverableErrorThrottlingMax": 1800,
        "ApplyErrorDeletePolicy": "IGNORE_RECORD",
        "ApplyErrorInsertPolicy": "LOG_ERROR",
        "ApplyErrorUpdatePolicy": "LOG_ERROR",
        "ApplyErrorEscalationPolicy": "LOG_ERROR",
        "ApplyErrorEscalationCount": 0,
        "ApplyErrorFailOnTruncationDdl": false,
        "FullLoadIgnoreConflicts": true,
        "FailOnTransactionConsistencyBreached": false,
        "FailOnNoTablesCaptured": false
    },
    "ChangeProcessingTuning": {
        "BatchApplyPreserveTransaction": true,
        "BatchApplyTimeoutMin": 1,
        "BatchApplyTimeoutMax": 30,
        "BatchApplyMemoryLimit": 500,
        "BatchSplitSize": 0,
        "MinTransactionSize": 1000,
        "CommitTimeout": 1,
        "MemoryLimitTotal": 1024,
        "MemoryKeepTime": 60,
        "StatementCacheSize": 50
    },
    "PostProcessingRules": null,
    "CharacterSetSettings": null,
    "LoopbackPreventionSettings": null
}

我一直在寻找任何关于此的问题。有没有人对如何进行故障排除或修复有建议？

标签： mysqlamazon-web-servicesaws-dms