{"id":68696,"date":"2026-01-30T14:08:51","date_gmt":"2026-01-30T06:08:51","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/68696.html"},"modified":"2026-01-30T14:08:51","modified_gmt":"2026-01-30T06:08:51","slug":"%e5%a4%a7%e6%95%b0%e6%8d%ae%e6%8a%80%e6%9c%af-flink-%e4%bc%98%e5%8c%96%e4%b9%8b%e6%95%b0%e6%8d%ae%e5%80%be%e6%96%9c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/68696.html","title":{"rendered":"\u5927\u6570\u636e\u6280\u672f Flink \u4f18\u5316\u4e4b\u6570\u636e\u503e\u659c"},"content":{"rendered":"

\u672c\u535a\u5ba2\u603b\u7ed3\u4e3aB\u7ad9\u5c1a\u7845\u8c37\u5927\u6570\u636eFlink2.0\u8c03\u4f18，Flink\u6027\u80fd\u4f18\u5316\u89c6\u9891\u7684\u7b14\u8bb0\u603b\u7ed3\u3002 \u5c1a\u7845\u8c37<\/span>https:\/\/so.csdn.net\/so\/search?q=%E5%B0%9A%E7%A1%85%E8%B0%B7&spm=1001.2101.3001.7020<\/span><\/span><\/p>\n

\u5927\u6570\u636eFlink2.0\u8c03\u4f18，Flink\u6027\u80fd\u4f18\u5316<\/span>https:\/\/www.bilibili.com\/video\/BV1Q5411f76P<\/span><\/span><\/p>\n

1\u3001 \u5224\u65ad\u662f\u5426\u5b58\u5728\u6570\u636e\u503e\u659c<\/h4>\n

\u76f8\u540c Task \u7684\u591a\u4e2a Subtask \u4e2d，\u4e2a\u522b Subtask \u63a5\u6536\u5230\u7684\u6570\u636e\u91cf\u660e\u663e\u5927\u4e8e\u5176\u4ed6Subtask \u63a5\u6536\u5230\u7684\u6570\u636e\u91cf，\u901a\u8fc7 Flink Web UI \u53ef\u4ee5\u7cbe\u786e\u5730\u770b\u5230\u6bcf\u4e2a Subtask \u5904\u7406\u4e86\u591a\u5c11\u6570\u636e，\u5373\u53ef\u5224\u65ad\u51fa Flink \u4efb\u52a1\u662f\u5426\u5b58\u5728\u6570\u636e\u503e\u659c\u3002\u901a\u5e38，\u6570\u636e\u503e\u659c\u4e5f\u4f1a\u5f15\u8d77\u53cd\u538b\u3002<\/p>\n

\"\"<\/p>\n

\u53e6\u5916，\u6709\u65f6 Checkpoint detail \u91cc\u4e0d\u540c SubTask \u7684 State size \u4e5f\u662f\u4e00\u4e2a\u5206\u6790\u6570\u636e\u503e\u659c\u7684\u6709\u7528\u6307\u6807\u3002<\/p>\n

2\u3001 \u6570\u636e\u503e\u659c\u7684\u89e3\u51b3<\/h4>\n

2.1 keyBy \u540e\u7684\u805a\u5408\u64cd\u4f5c\u5b58\u5728\u6570\u636e\u503e\u659c<\/h5>\n

\u63d0\u4ea4\u6848\u4f8b：<\/p>\n

bin\/flink run \\\\
\n\u200b
\n-t yarn-per-job \\\\
\n\u200b
\n-d \\\\
\n\u200b
\n-p 5 \\\\
\n\u200b
\n-Drest.flamegraph.enabled=true \\\\
\n\u200b
\n-Dyarn.application.queue=test \\\\
\n\u200b
\n-Djobmanager.memory.process.size=1024mb \\\\
\n\u200b
\n-Dtaskmanager.memory.process.size=2048mb \\\\
\n\u200b
\n-Dtaskmanager.numberOfTaskSlots=2 \\\\
\n\u200b
\n-c com.atguigu.flink.tuning.SkewDemo1 \\\\
\n\u200b
\n\/opt\/module\/flink-1.13.1\/myjar\/flink-tuning-1.0-SNAPSHOT.jar \\\\
\n\u200b
\n–local-keyby false <\/p>\n

\u67e5\u770b webui：<\/p>\n

\"\"<\/p>\n

1）\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u7528\u4e8c\u6b21\u805a\u5408\u6765\u5904\u7406<\/p>\n

Flink \u662f\u5b9e\u65f6\u6d41\u5904\u7406，\u5982\u679c keyby \u4e4b\u540e\u7684\u805a\u5408\u64cd\u4f5c\u5b58\u5728\u6570\u636e\u503e\u659c，\u4e14\u6ca1\u6709\u5f00\u7a97\u53e3（\u6ca1\u6512\u6279）\u7684\u60c5\u51b5\u4e0b，\u7b80\u5355\u7684\u8ba4\u4e3a\u4f7f\u7528\u4e24\u9636\u6bb5\u805a\u5408，\u662f\u4e0d\u80fd\u89e3\u51b3\u95ee\u9898\u7684\u3002\u56e0\u4e3a\u8fd9\u4e2a\u65f6\u5019 Flink \u662f\u6765\u4e00\u6761\u5904\u7406\u4e00\u6761，\u4e14\u5411\u4e0b\u6e38\u53d1\u9001\u4e00\u6761\u7ed3\u679c，\u5bf9\u4e8e\u539f\u6765 keyby \u7684\u7ef4\u5ea6（\u7b2c\u4e8c\u9636\u6bb5\u805a\u5408）\u6765\u8bb2，\u6570\u636e\u91cf\u5e76\u6ca1\u6709\u51cf\u5c11，\u4e14\u7ed3\u679c\u91cd\u590d\u8ba1\u7b97（\u975e FlinkSQL，\u672a\u4f7f\u7528\u56de\u64a4\u6d41），\u5982\u4e0b\u56fe\u6240\u793a：<\/p>\n

\"\"<\/p>\n

2）\u4f7f\u7528 LocalKeyBy \u7684\u601d\u60f3<\/p>\n

\u5728 keyBy \u4e0a\u6e38\u7b97\u5b50\u6570\u636e\u53d1\u9001\u4e4b\u524d，\u9996\u5148\u5728\u4e0a\u6e38\u7b97\u5b50\u7684\u672c\u5730\u5bf9\u6570\u636e\u8fdb\u884c\u805a\u5408\u540e，\u518d\u53d1\u9001\u5230\u4e0b\u6e38，\u4f7f\u4e0b\u6e38\u63a5\u6536\u5230\u7684\u6570\u636e\u91cf\u5927\u5927\u51cf\u5c11，\u4ece\u800c\u4f7f\u5f97 keyBy \u4e4b\u540e\u7684\u805a\u5408\u64cd\u4f5c\u4e0d\u518d\u662f\u4efb\u52a1\u7684\u74f6\u9888\u3002\u7c7b\u4f3c MapReduce \u4e2d Combiner \u7684\u601d\u60f3，\u4f46\u662f\u8fd9\u8981\u6c42\u805a\u5408\u64cd\u4f5c\u5fc5\u987b\u662f\u591a\u6761\u6570\u636e\u6216\u8005\u4e00\u6279\u6570\u636e\u624d\u80fd\u805a\u5408，\u5355\u6761\u6570\u636e\u6ca1\u6709\u529e\u6cd5\u901a\u8fc7\u805a\u5408\u6765\u51cf\u5c11\u6570\u636e\u91cf\u3002<\/span>\u4ece Flink LocalKeyBy \u5b9e\u73b0\u539f\u7406\u6765\u8bb2，\u5fc5\u7136\u4f1a\u5b58\u5728\u4e00\u4e2a\u79ef\u6512\u6279\u6b21<\/span>\u7684\u8fc7\u7a0b，\u5728\u4e0a\u6e38\u7b97\u5b50\u4e2d\u5fc5\u987b\u6512\u591f\u4e00\u5b9a\u7684\u6570\u636e\u91cf，\u5bf9\u8fd9\u4e9b\u6570\u636e\u805a\u5408\u540e\u518d\u53d1\u9001\u5230\u4e0b\u6e38\u3002<\/p>\n

\u5b9e\u73b0\u65b9\u5f0f：<\/p>\n

\u27a2 DataStreamAPI \u9700\u8981\u81ea\u5df1\u5199\u4ee3\u7801\u5b9e\u73b0<\/p>\n

\u27a2 SQL \u53ef\u4ee5\u6307\u5b9a\u53c2\u6570，\u5f00\u542f miniBatch \u548c LocalGlobal \u529f\u80fd（\u63a8\u8350，\u540e\u7eed\u4ecb\u7ecd）<\/p>\n

3）DataStream API \u81ea\u5b9a\u4e49\u5b9e\u73b0\u7684\u6848\u4f8b<\/p>\n

\u4ee5\u8ba1\u7b97\u6bcf\u4e2a mid \u51fa\u73b0\u7684\u6b21\u6570\u4e3a\u4f8b，keyby \u4e4b\u524d，\u4f7f\u7528 flatMap \u5b9e\u73b0 LocalKeyby \u529f\u80fd<\/p>\n

import org.apache.flink.api.common.functions.RichFlatMapFunction;
\n\u200b
\nimport org.apache.flink.api.common.state.ListState;
\n\u200b
\nimport org.apache.flink.api.common.state.ListStateDescriptor;
\n\u200b
\nimport org.apache.flink.api.common.typeinfo.Types;
\n\u200b
\nimport org.apache.flink.api.java.tuple.Tuple2;
\n\u200b
\nimport org.apache.flink.runtime.state.FunctionInitializationContext;
\n\u200b
\nimport org.apache.flink.runtime.state.FunctionSnapshotContext;
\n\u200b
\nimport org.apache.flink.streaming.api.checkpoint.CheckpointedFunction;
\n\u200b
\nimport org.apache.flink.util.Collector;
\n\u200b
\nimport java.util.HashMap;
\n\u200b
\nimport java.util.Map;
\n\u200b
\nimport java.util.concurrent.atomic.AtomicInteger;
\n\u200b
\npublic class LocalKeyByFlatMapFunc extends RichFlatMapFunction<Tuple2<String,
\n\u200b
\nLong>, Tuple2<String, Long>> implements CheckpointedFunction {
\n\u200b
\n \/\/Checkpoint \u65f6\u4e3a\u4e86\u4fdd\u8bc1 Exactly Once，\u5c06 buffer \u4e2d\u7684\u6570\u636e\u4fdd\u5b58\u5230\u8be5 ListState \u4e2d
\n\u200b
\n private ListState<Tuple2<String, Long>> listState;
\n\u200b
\n \/\/\u672c\u5730 buffer，\u5b58\u653e local \u7aef\u7f13\u5b58\u7684 mid \u7684 count \u4fe1\u606f
\n\u200b
\n private HashMap<String, Long> localBuffer;
\n\u200b
\n \/\/\u7f13\u5b58\u7684\u6570\u636e\u91cf\u5927\u5c0f，\u5373：\u7f13\u5b58\u591a\u5c11\u6570\u636e\u518d\u5411\u4e0b\u6e38\u53d1\u9001
\n\u200b
\n private int batchSize;
\n\u200b
\n \/\/\u8ba1\u6570\u5668，\u83b7\u53d6\u5f53\u524d\u6279\u6b21\u63a5\u6536\u7684\u6570\u636e\u91cf
\n\u200b
\n private AtomicInteger currentSize;
\n\u200b
\n \/\/\u6784\u9020\u5668，\u6279\u6b21\u5927\u5c0f\u4f20\u53c2
\n\u200b
\n public LocalKeyByFlatMapFunc(int batchSize) {
\n\u200b
\n this.batchSize = batchSize;
\n\u200b
\n }
\n\u200b
\n @Override
\n\u200b
\n public void flatMap(Tuple2<String, Long> value, Collector<Tuple2<String, Long>>
\n\u200b
\nout) throws Exception {
\n\u200b
\n \/\/ 1\u3001\u5c06\u65b0\u6765\u7684\u6570\u636e\u6dfb\u52a0\u5230 buffer \u4e2d
\n\u200b
\n Long count = localBuffer.getOrDefault(value, 0L);
\n\u200b
\n localBuffer.put(value.f0, count + 1);
\n\u200b
\n \/\/ 2\u3001\u5982\u679c\u5230\u8fbe\u8bbe\u5b9a\u7684\u6279\u6b21，\u5219\u5c06 buffer \u4e2d\u7684\u6570\u636e\u53d1\u9001\u5230\u4e0b\u6e38
\n\u200b
\n if (currentSize.incrementAndGet() >= batchSize) {
\n\u200b
\n \/\/ 2.1 \u904d\u5386 Buffer \u4e2d\u6570\u636e，\u53d1\u9001\u5230\u4e0b\u6e38
\n\u200b
\n for (Map.Entry<String, Long> midAndCount : localBuffer.entrySet()) {
\n\u200b
\n out.collect(Tuple2.of(midAndCount.getKey(),
\n\u200b
\nmidAndCount.getValue()));
\n\u200b
\n }
\n\u200b
\n \/\/ 2.2 Buffer \u6e05\u7a7a，\u8ba1\u6570\u5668\u6e05\u96f6
\n\u200b
\n localBuffer.clear();
\n\u200b
\n currentSize.set(0);
\n\u200b
\n }
\n\u200b
\n }
\n\u200b
\n @Override
\n\u200b
\n public void snapshotState(FunctionSnapshotContext context) throws Exception {
\n\u200b
\n \/\/ \u5c06 buffer \u4e2d\u7684\u6570\u636e\u4fdd\u5b58\u5230\u72b6\u6001\u4e2d，\u6765\u4fdd\u8bc1 Exactly Once
\n\u200b
\n listState.clear();
\n\u200b
\n for (Map.Entry<String, Long> midAndCount : localBuffer.entrySet()) {
\n\u200b
\n listState.add(Tuple2.of(midAndCount.getKey(), midAndCount.getValue()));
\n\u200b
\n }
\n\u200b
\n }
\n\u200b
\n @Override
\n\u200b
\n public void initializeState(FunctionInitializationContext context) throws Exception {
\n\u200b
\n \/\/ \u4ece\u72b6\u6001\u4e2d\u6062\u590d buffer \u4e2d\u7684\u6570\u636e
\n\u200b
\n listState = context.getOperatorStateStore().getListState(
\n\u200b
\n new ListStateDescriptor<Tuple2<String, Long>>(
\n\u200b
\n "localBufferState",
\n\u200b
\n Types.TUPLE(Types.STRING, Types.LONG)
\n\u200b
\n )
\n\u200b
\n );
\n\u200b
\n localBuffer = new HashMap();
\n\u200b
\n if (context.isRestored()) {
\n\u200b
\n \/\/ \u4ece\u72b6\u6001\u4e2d\u6062\u590d\u6570\u636e\u5230 buffer \u4e2d
\n\u200b
\n for (Tuple2<String, Long> midAndCount : listState.get()) {
\n\u200b
\n \/\/ \u5982\u679c\u51fa\u73b0 pv != 0,\u8bf4\u660e\u6539\u53d8\u4e86\u5e76\u884c\u5ea6，ListState \u4e2d\u7684\u6570\u636e\u4f1a\u88ab\u5747\u5300\u5206\u53d1\u5230
\n\u200b
\n\u65b0\u7684 subtask \u4e2d
\n\u200b
\n \/\/ \u5355\u4e2a subtask \u6062\u590d\u7684\u72b6\u6001\u4e2d\u53ef\u80fd\u5305\u542b\u591a\u4e2a\u76f8\u540c\u7684 mid \u7684 count \u6570\u636e
\n\u200b
\n \/\/ \u6240\u4ee5\u6bcf\u6b21\u5148\u53d6\u4e00\u4e0b buffer \u7684\u503c，\u7d2f\u52a0\u518d put
\n\u200b
\n long count = localBuffer.getOrDefault(midAndCount.f0, 0L);
\n\u200b
\n localBuffer.put(midAndCount.f0, count + midAndCount.f1);
\n\u200b
\n }
\n\u200b
\n \/\/ \u4ece\u72b6\u6001\u6062\u590d\u65f6，\u9ed8\u8ba4\u8ba4\u4e3a buffer \u4e2d\u6570\u636e\u91cf\u8fbe\u5230\u4e86 batchSize，\u9700\u8981\u5411\u4e0b\u6e38\u53d1
\n\u200b
\n currentSize = new AtomicInteger(batchSize);
\n\u200b
\n } else {
\n\u200b
\n currentSize = new AtomicInteger(0);
\n\u200b
\n }
\n\u200b
\n }
\n\u200b
\n} <\/p>\n

\u63d0\u4ea4 localkeyby \u6848\u4f8b：<\/p>\n

bin\/flink run \\\\
\n\u200b
\n-t yarn-per-job \\\\
\n\u200b
\n-d \\\\
\n\u200b
\n-p 5 \\\\
\n\u200b
\n-Drest.flamegraph.enabled=true \\\\
\n\u200b
\n-Dyarn.application.queue=test \\\\
\n\u200b
\n-Djobmanager.memory.process.size=1024mb \\\\
\n\u200b
\n-Dtaskmanager.memory.process.size=2048mb \\\\
\n\u200b
\n-Dtaskmanager.numberOfTaskSlots=2 \\\\
\n\u200b
\n-c com.atguigu.flink.tuning.SkewDemo1 \\\\
\n\u200b
\n\/opt\/module\/flink-1.13.1\/myjar\/flink-tuning-1.0-SNAPSHOT.jar \\\\
\n\u200b
\n–local-keyby true <\/p>\n

\u67e5\u770b webui：<\/p>\n

\"\"<\/p>\n

\u53ef\u4ee5\u770b\u5230\u6bcf\u4e2a subtask \u5904\u7406\u7684\u6570\u636e\u91cf\u57fa\u672c\u5747\u8861，\u53e6\u5916\u5904\u7406\u7684\u6570\u636e\u91cf\u76f8\u6bd4\u539f\u5148\u5c11\u4e86\u5f88\u591a\u3002<\/span><\/p>\n

2.2 keyBy \u4e4b\u524d\u53d1\u751f\u6570\u636e\u503e\u659c<\/h5>\n

\u5982\u679c keyBy \u4e4b\u524d\u5c31\u5b58\u5728\u6570\u636e\u503e\u659c，\u4e0a\u6e38\u7b97\u5b50\u7684\u67d0\u4e9b\u5b9e\u4f8b\u53ef\u80fd\u5904\u7406\u7684\u6570\u636e\u8f83\u591a，\u67d0\u4e9b\u5b9e\u4f8b\u53ef\u80fd\u5904\u7406\u7684\u6570\u636e\u8f83\u5c11，\u4ea7\u751f\u8be5\u60c5\u51b5\u53ef\u80fd\u662f\u56e0\u4e3a\u6570\u636e\u6e90\u7684\u6570\u636e\u672c\u8eab\u5c31\u4e0d\u5747\u5300，\u4f8b\u5982\u7531\u4e8e\u67d0\u4e9b\u539f\u56e0 Kafka \u7684 topic \u4e2d\u67d0\u4e9b partition \u7684\u6570\u636e\u91cf\u8f83\u5927，\u67d0\u4e9b partition \u7684\u6570\u636e\u91cf\u8f83\u5c11\u3002\u5bf9\u4e8e\u4e0d\u5b58\u5728 keyBy \u7684 Flink \u4efb\u52a1\u4e5f\u4f1a\u51fa\u73b0\u8be5\u60c5\u51b5\u3002<\/p>\n

\u8fd9\u79cd\u60c5\u51b5，\u9700\u8981\u8ba9 Flink \u4efb\u52a1\u5f3a\u5236\u8fdb\u884c shuffle\u3002\u4f7f\u7528 shuffle\u3001rebalance \u6216 rescale\u7b97\u5b50\u5373\u53ef\u5c06\u6570\u636e\u5747\u5300\u5206\u914d，\u4ece\u800c\u89e3\u51b3\u6570\u636e\u503e\u659c\u7684\u95ee\u9898\u3002<\/p>\n

2.3 keyBy \u540e\u7684\u7a97\u53e3\u805a\u5408\u64cd\u4f5c\u5b58\u5728\u6570\u636e\u503e\u659c<\/h5>\n

\u56e0\u4e3a\u4f7f\u7528\u4e86\u7a97\u53e3，\u53d8\u6210\u4e86\u6709\u754c\u6570\u636e（\u6512\u6279）\u7684\u5904\u7406，\u7a97\u53e3\u9ed8\u8ba4\u662f\u89e6\u53d1\u65f6\u624d\u4f1a\u8f93\u51fa\u4e00\u6761\u7ed3\u679c\u53d1\u5f80\u4e0b\u6e38，\u6240\u4ee5\u53ef\u4ee5\u4f7f\u7528\u4e24\u9636\u6bb5\u805a\u5408\u7684\u65b9\u5f0f：<\/p>\n

1）\u5b9e\u73b0\u601d\u8def：<\/p>\n

\u27a2 \u7b2c\u4e00\u9636\u6bb5\u805a\u5408：key \u62fc\u63a5\u968f\u673a\u6570\u524d\u7f00\u6216\u540e\u7f00，\u8fdb\u884c keyby\u3001\u5f00\u7a97\u3001\u805a\u5408<\/p>\n

\u6ce8\u610f：<\/span>\u805a\u5408\u5b8c\u4e0d\u518d\u662f WindowedStream，\u8981\u83b7\u53d6 WindowEnd \u4f5c\u4e3a\u7a97\u53e3\u6807\u8bb0\u4f5c\u4e3a\u7b2c\u4e8c\u9636\u6bb5\u5206\u7ec4\u4f9d\u636e，\u907f\u514d\u4e0d\u540c\u7a97\u53e3\u7684\u7ed3\u679c\u805a\u5408\u5230\u4e00\u8d77）<\/p>\n

\u27a2 \u7b2c\u4e8c\u9636\u6bb5\u805a\u5408：\u6309\u7167\u539f\u6765\u7684 key \u53ca windowEnd \u4f5c keyby\u3001\u805a\u5408<\/p>\n

2）\u63d0\u4ea4\u539f\u59cb\u6848\u4f8b<\/p>\n

bin\/flink run \\\\
\n\u200b
\n-t yarn-per-job \\\\
\n\u200b
\n-d \\\\
\n\u200b
\n-p 5 \\\\
\n\u200b
\n-Drest.flamegraph.enabled=true \\\\
\n\u200b
\n-Dyarn.application.queue=test \\\\
\n\u200b
\n-Djobmanager.memory.process.size=1024mb \\\\
\n\u200b
\n-Dtaskmanager.memory.process.size=2048mb \\\\
\n\u200b
\n-Dtaskmanager.numberOfTaskSlots=2 \\\\
\n\u200b
\n-c com.atguigu.flink.tuning.SkewDemo2 \\\\
\n\u200b
\n\/opt\/module\/flink-1.13.1\/myjar\/flink-tuning-1.0-SNAPSHOT.jar \\\\
\n\u200b
\n–two-phase false <\/p>\n

\u67e5\u770b WebUI：<\/p>\n

\"\"<\/p>\n

3）\u63d0\u4ea4\u4e24\u9636\u6bb5\u805a\u5408\u7684\u6848\u4f8b<\/p>\n

bin\/flink run \\\\
\n\u200b
\n-t yarn-per-job \\\\
\n\u200b
\n-d \\\\
\n\u200b
\n-p 5 \\\\
\n\u200b
\n-Drest.flamegraph.enabled=true \\\\
\n\u200b
\n-Dyarn.application.queue=test \\\\
\n\u200b
\n-Djobmanager.memory.process.size=1024mb \\\\
\n\u200b
\n-Dtaskmanager.memory.process.size=2048mb \\\\
\n\u200b
\n-Dtaskmanager.numberOfTaskSlots=2 \\\\
\n\u200b
\n-c com.atguigu.flink.tuning.SkewDemo2 \\\\
\n\u200b
\n\/opt\/module\/flink-1.13.1\/myjar\/flink-tuning-1.0-SNAPSHOT.jar \\\\
\n\u200b
\n–two-phase true \\\\
\n\u200b
\n–random-num 16 <\/p>\n

\u67e5\u770b WebUI：\u53ef\u4ee5\u770b\u5230\u7b2c\u4e00\u6b21\u6253\u6563\u7684\u7a97\u53e3\u805a\u5408，\u6bd4\u8f83\u5747\u5300<\/p>\n

\"\"<\/p>\n

\u7b2c\u4e8c\u6b21\u805a\u5408，\u4e5f\u6bd4\u8f83\u5747\u5300：<\/p>\n

\"\"<\/p>\n

\u968f\u673a\u6570\u8303\u56f4，\u9700\u8981\u81ea\u5df1\u53bb\u6d4b，\u56e0\u4e3a keyby \u7684\u5206\u533a\u5668\u662f（\u4e24\u6b21 hash*\u4e0b\u6e38\u5e76\u884c\u5ea6\/\u6700\u5927\u5e76\u884c\u5ea6）<\/span><\/p>\n

SQL \u5199\u6cd5\u53c2\u8003：https:\/\/zhuanlan.zhihu.com\/p\/197299746<\/p>\n","protected":false},"excerpt":{"rendered":"

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\n\u5927\u6570\u636eFlink2.0\u8c03\u4f18，Flink\u6027\u80fd\u4f18\u5316https:\/\/www.bilibili.com\/video\/BV1Q5411f76P
\n1\u3001 \u5224\u65ad\u662f\u5426\u5b58\u5728\u6570\u636e\u503e\u659c
\n\u76f8\u540c Task \u7684\u591a\u4e2a S<\/p>\n","protected":false},"author":2,"featured_media":68688,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1138,323],"topic":[],"class_list":["post-68696","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-flink","tag-323"],"yoast_head":"\n\u5927\u6570\u636e\u6280\u672f Flink \u4f18\u5316\u4e4b\u6570\u636e\u503e\u659c - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/68696.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5927\u6570\u636e\u6280\u672f Flink \u4f18\u5316\u4e4b\u6570\u636e\u503e\u659c - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u672c\u535a\u5ba2\u603b\u7ed3\u4e3aB\u7ad9\u5c1a\u7845\u8c37\u5927\u6570\u636eFlink2.0\u8c03\u4f18，Flink\u6027\u80fd\u4f18\u5316\u89c6\u9891\u7684\u7b14\u8bb0\u603b\u7ed3\u3002 \u5c1a\u7845\u8c37https:\/\/so.csdn.net\/so\/search?q%E5%B0%9A%E7%A1%85%E8%B0%B7&spm1001.2101.3001.7020 \u5927\u6570\u636eFlink2.0\u8c03\u4f18，Flink\u6027\u80fd\u4f18\u5316https:\/\/www.bilibili.com\/video\/BV1Q5411f76P 1\u3001 \u5224\u65ad\u662f\u5426\u5b58\u5728\u6570\u636e\u503e\u659c \u76f8\u540c Task \u7684\u591a\u4e2a S\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/68696.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-30T06:08:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260130060848-697c4af0bbf7a.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/68696.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/68696.html\",\"name\":\"\u5927\u6570\u636e\u6280\u672f Flink \u4f18\u5316\u4e4b\u6570\u636e\u503e\u659c - 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