{"id":32559,"date":"2025-04-24T20:17:42","date_gmt":"2025-04-24T12:17:42","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/32559.html"},"modified":"2025-04-24T20:17:42","modified_gmt":"2025-04-24T12:17:42","slug":"spark-streaming","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/32559.html","title":{"rendered":"Spark-Streaming"},"content":{"rendered":"

Spark-Streaming\u6982\u8ff0<\/h2>\n

Spark Streaming \u7528\u4e8e\u6d41\u5f0f\u6570\u636e\u7684\u5904\u7406<\/p>\n

Spark Streaming \u652f\u6301\u7684\u6570\u636e\u8f93\u5165\u6e90\u5f88\u591a，\u4f8b\u5982：Kafka\u3001Flume\u3001Twitter\u7b49，\u4ee5\u53ca\u548c\u7b80\u5355\u7684 TCP \u5957\u63a5\u5b57\u7b49\u7b49<\/p>\n

\u6570\u636e\u8f93\u5165\u540e\u53ef\u4ee5\u7528 Spark \u7684\u9ad8\u5ea6\u62bd\u8c61\u539f\u8bed\u5982：map\u3001reduce\u3001join\u3001window \u7b49\u8fdb\u884c\u8fd0\u7b97\u3002\u800c\u7ed3\u679c\u4e5f\u80fd\u4fdd\u5b58\u5728\u5f88\u591a\u5730\u65b9，\u5982 HDFS，\u6570\u636e\u5e93\u7b49<\/p>\n

\"\"<\/p>\n

\u548c\u00a0Spark \u57fa\u4e8e RDD \u7684\u6982\u5ff5\u5f88\u76f8\u4f3c，Spark Streaming \u4f7f\u7528\u79bb\u6563\u5316\u6d41(discretized stream)\u4f5c\u4e3a\u62bd\u8c61\u8868\u793a，\u53eb\u4f5c\u00a0DStream<\/p>\n

DStream \u662f\u968f\u65f6\u95f4\u63a8\u79fb\u800c\u6536\u5230\u7684\u6570\u636e\u7684\u5e8f\u5217<\/p>\n

Spark-Streaming\u7684\u7279\u70b9<\/h3>\n
  • \n

    \u6613\u7528\u6027：Spark Streaming\u652f\u6301Java\u3001Python\u3001Scala\u7b49\u7f16\u7a0b\u8bed\u8a00，\u53ef\u4ee5\u50cf\u7f16\u5199\u79bb\u7ebf\u7a0b\u5e8f\u4e00\u6837\u7f16\u5199\u5b9e\u65f6\u8ba1\u7b97\u7684\u7a0b\u5e8f<\/p>\n<\/li>\n

  • \n

    \u5bb9\u9519：Spark Streaming\u5728\u6ca1\u6709\u989d\u5916\u4ee3\u7801\u548c\u914d\u7f6e\u7684\u60c5\u51b5\u4e0b，\u53ef\u4ee5\u6062\u590d\u4e22\u5931\u7684\u6570\u636e\u3002\u5bf9\u4e8e\u5b9e\u65f6\u8ba1\u7b97\u6765\u8bf4，\u5bb9\u9519\u6027\u81f3\u5173\u91cd\u8981<\/p>\n<\/li>\n

  • \n

    \u6613\u6574\u5408：Spark Streaming\u53ef\u4ee5\u5728Spark\u4e0a\u8fd0\u884c，\u5e76\u4e14\u8fd8\u5141\u8bb8\u91cd\u590d\u4f7f\u7528\u76f8\u540c\u7684\u4ee3\u7801\u8fdb\u884c\u6279\u5904\u7406\u3002\u4e5f\u5c31\u662f\u8bf4，\u5b9e\u65f6\u5904\u7406\u53ef\u4ee5\u4e0e\u79bb\u7ebf\u5904\u7406\u76f8\u7ed3\u5408，\u5b9e\u73b0\u4ea4\u4e92\u5f0f\u7684\u67e5\u8be2\u64cd\u4f5c<\/p>\n<\/li>\n

    Spark-Streaming\u67b6\u6784<\/h3>\n

    \u67b6\u6784\u56fe：\"\"<\/p>\n<\/p>\n

    DStream\u5b9e\u64cd<\/h3>\n

    \u5b9e\u4f8b：<\/p>\n

    \u4f7f\u7528\u00a0netcat \u5de5\u5177\u5411 9999 \u7aef\u53e3\u4e0d\u65ad\u7684\u53d1\u9001\u6570\u636e，\u901a\u8fc7 SparkStreaming \u8bfb\u53d6\u7aef\u53e3\u6570\u636e\u5e76\u7edf\u8ba1\u4e0d\u540c\u5355\u8bcd\u51fa\u73b0\u7684\u6b21\u6570<\/p>\n

    \u6dfb\u52a0spark-streaming\u7684\u4f9d\u8d56<\/span><\/p>\n

    \"\"<\/p>\n

    \u4ee3\u7801：<\/p>\n

    \"\"<\/p>\n

    \u5728\u865a\u62df\u673a\u542f\u52a8netcat\u5e76\u53d1\u9001\u6570\u636e<\/p>\n

    \"\"<\/p>\n

    \u8fd0\u884c\u7ed3\u679c：<\/p>\n

    \"\"<\/p>\n

    \u6848\u4f8b\u89e3\u6790：<\/p>\n

    Discretized Stream \u662f Spark Streaming \u7684\u57fa\u7840\u62bd\u8c61，\u4ee3\u8868\u6301\u7eed\u6027\u7684\u6570\u636e\u6d41\u548c\u7ecf\u8fc7\u5404\u79cd Spark \u539f\u8bed\u64cd\u4f5c\u540e\u7684\u7ed3\u679c\u6570\u636e\u6d41\u3002\u5728\u5185\u90e8\u5b9e\u73b0\u4e0a，DStream \u662f\u4e00\u7cfb\u5217\u8fde\u7eed\u7684 RDD \u6765\u8868\u793a\u3002\u6bcf\u4e2a RDD \u542b\u6709 \u4e00\u6bb5\u65f6\u95f4\u95f4\u9694\u5185\u7684\u6570\u636e<\/p>\n

    \"\"<\/p>\n

    \u5bf9\u6570\u636e\u7684\u64cd\u4f5c\u4e5f\u662f\u6309\u7167 RDD \u4e3a\u5355\u4f4d\u6765\u8fdb\u884c\u7684<\/p>\n

    \"\"<\/p>\n

    \u8ba1\u7b97\u8fc7\u7a0b\u7531 Spark Engine \u6765\u5b8c\u6210<\/p>\n

    \"\"<\/p>\n

    Spark-Streaming\u6838\u5fc3\u7f16\u7a0b<\/h2>\n

    DStream \u521b\u5efa<\/h3>\n

    \u521b\u5efaDStream\u7684\u4e09\u79cd\u65b9\u5f0f：RDD\u961f\u5217\u3001\u81ea\u5b9a\u4e49\u6570\u636e\u6e90\u3001kafka\u6570\u636e\u6e90<\/p>\n

    RDD\u961f\u5217<\/h4>\n

    \u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 ssc.queueStream(queueOfRDDs)\u6765\u521b\u5efa DStream，\u6bcf\u4e00\u4e2a\u63a8\u9001\u5230\u8fd9\u4e2a\u961f\u5217\u4e2d\u7684 RDD，\u90fd\u4f1a\u4f5c\u4e3a\u4e00\u4e2aDStream \u5904\u7406<\/p>\n

    \u5b9e\u4f8b：<\/p>\n

    \u5faa\u73af\u521b\u5efa\u51e0\u4e2a RDD，\u5c06 RDD \u653e\u5165\u961f\u5217\u3002\u901a\u8fc7 SparkStream \u521b\u5efa Dstream，\u8ba1\u7b97 WordCount<\/p>\n

    \"\"<\/p>\n

    \u8fd0\u884c\u7ed3\u679c：<\/p>\n

    \"\"<\/p>\n

    \u81ea\u5b9a\u4e49\u6570\u636e\u6e90<\/h4>\n

    \u81ea\u5b9a\u4e49\u6570\u636e\u6e90\u9700\u8981\u7ee7\u627f Receiver，\u5e76\u5b9e\u73b0 onStart\u3001onStop \u65b9\u6cd5\u6765\u81ea\u5b9a\u4e49\u6570\u636e\u6e90\u91c7\u96c6<\/p>\n

    \u6848\u4f8b：<\/p>\n

    \u81ea\u5b9a\u4e49\u6570\u636e\u6e90，\u5b9e\u73b0\u76d1\u63a7\u67d0\u4e2a\u7aef\u53e3\u53f7，\u83b7\u53d6\u8be5\u7aef\u53e3\u53f7\u5185\u5bb9<\/p>\n

    \"\"<\/p>\n

    \"\"<\/p>\n

    \u8fd0\u884c\u7ed3\u679c：<\/p>\n

    \"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb1.1k\u6b21\uff0c\u70b9\u8d5e26\u6b21\uff0c\u6536\u85cf13\u6b21\u3002Spark Streaming \u7528\u4e8e\u6d41\u5f0f\u6570\u636e\u7684\u5904\u7406Spark Streaming \u652f\u6301\u7684\u6570\u636e\u8f93\u5165\u6e90\u5f88\u591a\uff0c\u4f8b\u5982\uff1aKafka\u3001Flume\u3001Twitter\u7b49\uff0c\u4ee5\u53ca\u548c\u7b80\u5355\u7684 TCP \u5957\u63a5\u5b57\u7b49\u7b49\u6570\u636e\u8f93\u5165\u540e\u53ef\u4ee5\u7528 Spark \u7684\u9ad8\u5ea6\u62bd\u8c61\u539f\u8bed\u5982\uff1amap\u3001reduce\u3001join\u3001window \u7b49\u8fdb\u884c\u8fd0\u7b97\u3002\u800c\u7ed3\u679c\u4e5f\u80fd\u4fdd\u5b58\u5728\u5f88\u591a\u5730\u65b9\uff0c\u5982 HDFS\uff0c\u6570\u636e\u5e93\u7b49\u548c Spark \u57fa\u4e8e RDD \u7684\u6982\u5ff5\u5f88\u76f8\u4f3c\uff0cSpark Streaming \u4f7f\u7528\u79bb\u6563\u5316\u6d41(discretized stream)\u4f5c\u4e3a\u62bd\u8c61\u8868\u793a\uff0c\u53eb\u4f5c DStream\u3002<\/p>\n","protected":false},"author":2,"featured_media":32545,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[365,664,323],"topic":[],"class_list":["post-32559","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-spark","tag-664","tag-323"],"yoast_head":"\nSpark-Streaming - 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