{"id":5742,"date":"2021-04-23T16:12:48","date_gmt":"2021-04-23T08:12:48","guid":{"rendered":"https:\/\/nj.transwarp.cn:8180\/?p=5742"},"modified":"2024-12-11T14:05:15","modified_gmt":"2024-12-11T06:05:15","slug":"inceptor%e5%88%86%e5%8c%ba%e5%88%86%e6%a1%b6%e9%a1%bb%e7%9f%a5","status":"publish","type":"post","link":"https:\/\/kbwp.transwarp.cn\/?p=5742","title":{"rendered":"inceptor\u5206\u533a\u5206\u6876\u987b\u77e5"},"content":{"rendered":"<h3>\u6982\u8981\u63cf\u8ff0<\/h3>\n<hr \/>\n<p>\u6211\u4eec\u77e5\u9053\u4f20\u7edf\u7684DBMS\u7cfb\u7edf\u4e00\u822c\u90fd\u5177\u6709\u8868\u5206\u533a\u7684\u529f\u80fd\uff0c\u901a\u8fc7\u8868\u5206\u533a\u80fd\u591f\u5728\u7279\u5b9a\u7684\u533a\u57df\u68c0\u7d22\u6570\u636e\uff0c\u51cf\u5c11\u626b\u63cf\u6210\u672c\uff0c\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\uff0c\u5f53\u7136\u6211\u4eec\u8fd8\u53ef\u4ee5\u901a\u8fc7\u8fdb\u4e00\u6b65\u5728\u5206\u533a\u4e0a\u5efa\u7acb\u7d22\u5f15\u8fdb\u4e00\u6b65\u63d0\u5347\u67e5\u8be2\u6548\u7387\u3002\u5728\u6b64\u5c31\u4e0d\u8d58\u8ff0\u4e86\u3002<\/p>\n<p>\u5728Hive\u6570\u4ed3\u4e2d\u4e5f\u6709\u5206\u533a\u5206\u6876\u7684\u6982\u5ff5\uff0c\u5728\u903b\u8f91\u4e0a\u5206\u533a\u8868\u4e0e\u672a\u5206\u533a\u8868\u6ca1\u6709\u533a\u522b\uff0c\u5728\u7269\u7406\u4e0a\u5206\u533a\u8868\u4f1a\u5c06\u6570\u636e\u6309\u7167\u5206\u533a\u952e\u7684\u5217\u503c\u5b58\u50a8\u5728\u8868\u76ee\u5f55\u7684\u5b50\u76ee\u5f55\u4e2d\uff0c\u76ee\u5f55\u540d=\u201c\u5206\u533a\u952e=\u952e\u503c\u201d\u3002\u5176\u4e2d\u9700\u8981\u6ce8\u610f\u7684\u662f\u5206\u533a\u952e\u7684\u503c\u4e0d\u4e00\u5b9a\u8981\u57fa\u4e8e\u8868\u7684\u67d0\u4e00\u5217\uff08\u5b57\u6bb5\uff09\uff0c\u5b83\u53ef\u4ee5\u6307\u5b9a\u4efb\u610f\u503c\uff0c\u53ea\u8981\u67e5\u8be2\u7684\u65f6\u5019\u6307\u5b9a\u76f8\u5e94\u7684\u5206\u533a\u952e\u6765\u67e5\u8be2\u5373\u53ef\u3002\u6211\u4eec\u53ef\u4ee5\u5bf9\u5206\u533a\u8fdb\u884c\u6dfb\u52a0\u3001\u5220\u9664\u3001\u91cd\u547d\u540d\u3001\u6e05\u7a7a\u7b49\u64cd\u4f5c\u3002\u56e0\u4e3a\u5206\u533a\u5728\u7279\u5b9a\u7684\u533a\u57df\uff08\u5b50\u76ee\u5f55\uff09\u4e0b\u68c0\u7d22\u6570\u636e\uff0c\u5b83\u4f5c\u7528\u540cDNMS\u5206\u533a\u4e00\u6837\uff0c\u90fd\u662f\u4e3a\u4e86\u51cf\u5c11\u626b\u63cf\u6210\u672c\u3002<\/p>\n<p>\u5206\u6876\u5219\u662f\u6307\u5b9a\u5206\u6876\u8868\u7684\u67d0\u4e00\u5217\uff0c\u8ba9\u8be5\u5217\u6570\u636e\u6309\u7167\u54c8\u5e0c\u53d6\u6a21\u7684\u65b9\u5f0f\u968f\u673a\u3001\u5747\u5300\u5730\u5206\u53d1\u5230\u5404\u4e2a\u6876\u6587\u4ef6\u4e2d\u3002\u56e0\u4e3a\u5206\u6876\u64cd\u4f5c\u9700\u8981\u6839\u636e\u67d0\u4e00\u5217\u5177\u4f53\u6570\u636e\u6765\u8fdb\u884c\u54c8\u5e0c\u53d6\u6a21\u64cd\u4f5c\uff0c\u6545\u6307\u5b9a\u7684\u5206\u6876\u5217\u5fc5\u987b\u57fa\u4e8e\u8868\u4e2d\u7684\u67d0\u4e00\u5217\uff08\u5b57\u6bb5\uff09\u3002\u56e0\u4e3a\u5206\u6876\u6539\u53d8\u4e86\u6570\u636e\u7684\u5b58\u50a8\u65b9\u5f0f\uff0c\u5b83\u4f1a\u628a\u54c8\u5e0c\u53d6\u6a21\u76f8\u540c\u6216\u8005\u5728\u67d0\u4e00\u533a\u95f4\u7684\u6570\u636e\u884c\u653e\u5728\u540c\u4e00\u4e2a\u6876\u6587\u4ef6\u4e2d\u3002\u5982\u6b64\u4e00\u6765\u4fbf\u53ef\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u3002<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2021\/04\/image-1619149394080.png\" alt=\"file\" \/><\/p>\n<h3>\u8be6\u7ec6\u8bf4\u660e<\/h3>\n<hr \/>\n<h4><strong>\u5206\u6876<\/strong><\/h4>\n<h5><strong>i \u542b\u4e49<\/strong><\/h5>\n<p>\u901a\u8fc7\u5206\u6876\u952e\u54c8\u5e0c\u53d6\u6a21\uff08key hashcode %N\uff09\u7684\u65b9\u5f0f\uff0c\u5c06\u8868\u6216\u5206\u533a\u4e2d\u7684\u6570\u636e\u968f\u673a\u3001\u5747\u5300\u5730\u5206\u53d1\u5230N\u4e2a\u6876\u4e2d\uff0c\u6876\u6570N\u4e00\u822c\u4e3a\u8d28\u6570\uff0c\u6876\u7f16\u53f7\u4e3a0, 1, \u2026, N-1<\/p>\n<h5><strong>ii \u6ce8\u610f\u70b9<\/strong><\/h5>\n<ul>\n<li>a) \u4e8b\u52a1\u8868\u5fc5\u987b\u5206\u6876\uff0c\u975e\u4e8b\u52a1\u8868\u53ef\u4ee5\u4e0d\u5206\u6876;<\/li>\n<li>b) \u5206\u6876\u6570\uff1a\u6700\u597d\u662f\u8d28\u6570\uff0c\u5f53\u7136\u5408\u6570\u4e5f\u53ef\u4ee5\uff0c\u5206\u6876\u6570\u907f\u5f0031\u7684\u500d\u6570;<\/li>\n<li>c) \u5206\u6876\u5927\u5c0f\uff1a\u5206\u6876\u540e\u7684orc\u8868\uff0c100M-200M\u6bcf\u6876\u3002\u76f8\u5bf9\u4e8e\u5916\u8868\uff0corc\u8868\u7684\u538b\u7f29\u7387\u4e3a3~5\uff0c\u5047\u8bbe\u5916\u8868\u7684\u5927\u5c0f\u4e3a10G\uff0c\u5bfc\u5165orc\u8868\u540e\uff0c\u5927\u5c0f\u7ea6\u4e3a2G\uff0c\u53ef\u4ee5\u520623\u4e2a\u6876;<\/li>\n<li>d) \u5bf9\u4e8e\u666e\u901aORC\u8868\uff0c\u5355\u5206\u6876\u5927\u5c0f\u5efa\u8bae\u5728200M\u4ee5\u5185;<\/li>\n<li>e) \u5bf9\u4e8eORC\u4e8b\u52a1\u8868\uff0c\u6807\u51c6\u9002\u5f53\u964d\u4f4e\uff0c\u6587\u4ef6\u5927\u5c0f\u9650\u5236\u5728100M\u4ee5\u5185\uff0c\u8bb0\u5f55\u6761\u6570\u9650\u5236\u5728\u51e0\u767e\u4e07\u6761\u5de6\u53f3;<\/li>\n<li>f) \u5206\u6876\u5b57\u6bb5\u9009\u62e9\uff1a\u53ea\u80fd\u7528\u4e00\u5217\u8fdb\u884c\u5206\u6876\uff0c\u9009\u62e9\u8fc7\u6ee4\u7387\u9ad8\u7684\u5217\uff0c\u5982\u679c\u5217\u7684\u91cd\u590d\u503c\u592a\u591a\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6570\u636e\u503e\u659c\u3002\u5206\u6876\u5b57\u6bb5\u4e0d\u80fd\u662fnull\u503c;\n<ul>\n<li>\u4f8b\u5982\uff0c\u5047\u5982\u9700\u8981\u5c0650\u4e2a\u8bb0\u5f551\uff0c1\uff0c2\uff0c2\uff0c4\uff0c&#8230;\uff0c4\u6309\u7167\u54c8\u5e0c\u89c4\u5219\u5206\u7ed9\u4e24\u4e2aBucket\uff0c\u90a3\u4e48\u670948\u4e2a\u8bb0\u5f55\u90fd\u4f1a\u5206\u914d\u7ed9\u6807\u53f7\u4e3a0\u7684Bucket\uff0c\u800c\u6807\u53f7\u4e3a1\u7684Bucket\u7684\u6570\u636e\u91cf\u4ec5\u4e3a2\uff0c\u6ca1\u6709\u5f88\u597d\u5b9e\u73b0\u5206\u6563\u6570\u636e\u7684\u76ee\u7684\uff0c\u56e0\u6b64\u4e0d\u5efa\u8bae\u91c7\u7528\u8be5\u5217\u4e3a\u5206\u6876\u5b57\u6bb5;<\/li>\n<\/ul>\n<\/li>\n<li>g) ORC\u8868\u5efa\u5b8c\u540e\uff0c\u5206\u6876\u5b57\u6bb5\u548c\u6876\u6570\u4e0d\u80fd\u4fee\u6539\uff0c\u6240\u4ee5\uff0c\u5bf9\u4e8e\u6570\u636e\u91cf\u589e\u957f\u8f83\u5feb\u7684\u8868\uff0c\u5206\u6876\u6570\u7684\u9009\u62e9\u8981\u7ed3\u5408\u672a\u6765\u51e0\u5e74\u540e\u7684\u6570\u636e\u91cf\u8fdb\u884c\u8bc4\u4f30;<\/li>\n<li>h) \u5982\u679c\u662f\u5206\u533a\u8868\uff0c\u5206\u6876\u6570\u662f\u9488\u5bf9\u6bcf\u4e2a\u5206\u533a\u7684\u3002\u4f8b\u5982\uff0c\u5982\u679c\u521b\u5efa\u5206\u533a\u5206\u6876\u8868\u65f6\u6307\u5b9a\u7684\u5206\u6876\u6570\u662f11\uff0c\u90a3\u4e48\u6bcf\u4e2a\u5206\u533a\u4e2d\u7684\u6570\u636e\u90fd\u4f1a\u518d\u5206\u621011\u4e2a\u6876;<\/li>\n<li>i) \u6bcf\u4e2a\u5206\u6876\u5bf9\u5e94\u7684\u662fHDFS\u4e0a\u7684\u4e00\u4e2a\u6587\u4ef6;<\/li>\n<li>j) \u5206\u6876\u5b57\u6bb5\u7c7b\u578b\uff1a\u5efa\u8bae\u7528string\uff0c\u4e0d\u5efa\u8bae\u4f7f\u7528decimal\u7c7b\u578b;<\/li>\n<li>k) \u5982\u679c\u8868\u4e2d\u6ca1\u6709\u5408\u9002\u7684\u5b57\u6bb5\u8fdb\u884c\u5206\u6876\uff0c\u9700\u8981\u8003\u8651\u989d\u5916\u589e\u52a0\u4e00\u5217\u3002\u5047\u8bbe\u8868\u4e2d\u6709\u8054\u5408\u4e3b\u952ea\u3001b\uff0c\u53ef\u4ee5\u4f7f\u7528md5(a||b)\uff1b<\/li>\n<\/ul>\n<h5><strong>iii \u5206\u6876\u7684\u597d\u5904<\/strong><\/h5>\n<ul>\n<li>a) \u6761\u4ef6\u8fc7\u6ee4\u65f6\uff0c\u5982\u679c\u8fc7\u6ee4\u5b57\u6bb5\u548c\u5206\u6876\u5b57\u6bb5\u4e00\u81f4\uff0c\u53ef\u6839\u636e\u54c8\u5e0c\u7ed3\u679c\u76f4\u63a5\u77e5\u9053\u8be5\u8bb0\u5f55\u6240\u5728\u7684\u5206\u6876\u7f16\u53f7\uff0c\u53ea\u5728\u8fd9\u4e9b\u5206\u6876\u67e5\u627e\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55\uff0c\u800c\u4e0d\u7528\u641c\u7d22\u6240\u6709\u7684\u6587\u4ef6\uff0c\u6709\u5f88\u9ad8\u7684\u67e5\u8be2\u6548\u7387\u3002\u6240\u4ee5\u5206\u6876\u5b57\u6bb5\u53ef\u4ee5\u9002\u5f53\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\uff1b<\/li>\n<li>b) \u65b9\u4fbf\u6570\u636e\u62bd\u6837sampling\uff1b\n<ul>\n<li>\u6709\u52a9\u4e8e\u5feb\u901f\u53d6\u6837 \u53d6\u6837\u662f\u4ece\u6240\u6709\u6570\u636e\u968f\u673a\u62bd\u53d6\u4e00\u90e8\u5206\u6837\u672c\u3002\u8868\u82e5\u88ab\u5206\u6876\uff0c\u6bcf\u4e2abucket\u7684\u5185\u5bb9\u662f\u5bf9\u6570\u636e\u79bb\u6563\u540e\u7684\u7ed3\u679c\uff0c\u6ee1\u8db3\u6837\u672c\u7684\u8981\u6c42\uff0c\u6240\u4ee5\u53d6\u6837\u65f6\u53ef\u4ee5\u76f4\u63a5\u62bd\u53d6\u4efb\u610f\u4e00\u6876\u7684\u5168\u90e8\u6570\u636e\u4f5c\u4e3a\u6837\u672c<\/li>\n<\/ul>\n<\/li>\n<li>c) join\u65f6\u53ef\u4ee5\u63d0\u9ad8MR\u7a0b\u5e8f\u6548\u7387\uff1b\n<ul>\n<li>\u83b7\u5f97\u66f4\u9ad8\u7684\u67e5\u8be2\u5904\u7406\u6548\u7387\u3002\u6876\u4e3a\u8868\u52a0\u4e0a\u4e86\u989d\u5916\u7684\u7ed3\u6784\uff0cHive \u5728\u5904\u7406\u6709\u4e9b\u67e5\u8be2\u65f6\u80fd\u5229\u7528\u8fd9\u4e2a\u7ed3\u6784\u3002\u5177\u4f53\u800c\u8a00\uff0c\u8fde\u63a5\u4e24\u4e2a\u5728\uff08\u5305\u542b\u8fde\u63a5\u5217\u7684\uff09\u76f8\u540c\u5217\u4e0a\u5212\u5206\u4e86\u6876\u7684\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528 Map \u7aef\u8fde\u63a5 \uff08Map-side join\uff09\u9ad8\u6548\u7684\u5b9e\u73b0\u3002\u6bd4\u5982JOIN\u64cd\u4f5c\u3002\u5bf9\u4e8eJOIN\u64cd\u4f5c\u4e24\u4e2a\u8868\u6709\u4e00\u4e2a\u76f8\u540c\u7684\u5217\uff0c\u5982\u679c\u5bf9\u8fd9\u4e24\u4e2a\u8868\u90fd\u8fdb\u884c\u4e86\u6876\u64cd\u4f5c\u3002\u90a3\u4e48\u5c06\u4fdd\u5b58\u76f8\u540c\u5217\u503c\u7684\u6876\u8fdb\u884cJOIN\u64cd\u4f5c\u5c31\u53ef\u4ee5\uff0c\u53ef\u4ee5\u5927\u5927\u8f83\u5c11JOIN\u7684\u6570\u636e\u91cf<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h5><strong>iiii \u5206\u6876\u8fc7\u591a\u7684\u5f0a\u7aef<\/strong><\/h5>\n<ul>\n<li>a) \u5982\u679c\u8868\u6709\u5f88\u591a\u6876,\u5219\u6bcf\u4e2a\u6876\u4f1a\u7528\u4e00\u4e2amap\u4efb\u52a1\u6765\u5b8c\u6210\uff0c\u800c\u4e00\u4e2amap\u4efb\u52a1\u542f\u52a8\u548c\u521d\u59cb\u5316\u7684\u65f6\u95f4\u8fdc\u8fdc\u5927\u4e8e\u903b\u8f91\u5904\u7406\u7684\u65f6\u95f4\uff0c\u5c31\u4f1a\u9020\u6210\u5f88\u5927\u7684\u8d44\u6e90\u6d6a\u8d39\u3002\u800c\u4e14\uff0c\u540c\u65f6\u53ef\u6267\u884c\u7684map\u6570\u662f\u53d7\u6700\u5927task\u5e76\u53d1\u6570\u9650\u5236\u7684\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4><strong>\u5206\u533a<\/strong><\/h4>\n<h5><strong>i \u542b\u4e49<\/strong><\/h5>\n<p>\u901a\u8fc7\u7279\u5b9a\u6761\u4ef6\uff08\u76f8\u7b49\u6216\u5927\u4e8e\u5c0f\u4e8e\uff09\u5c06\u8868\u7684\u6570\u636e\u5206\u53d1\u5230\u5206\u533a\u76ee\u5f55\u4e2d\uff0c\u6216\u8005\u5c06\u5206\u533a\u4e2d\u7684\u6570\u636e\u5206\u53d1\u5230\u5b50\u5206\u533a\u76ee\u5f55\u4e2d\u3002<\/p>\n<h5><strong>ii \u6ce8\u610f\u70b9<\/strong><\/h5>\n<ul>\n<li>a) \u5206\u533a\u6570\u592a\u591a\u4f1a\u964d\u4f4e\u8ba1\u7b97\u548c\u5b58\u50a8\u7684\u6027\u80fd\uff1b<\/li>\n<li>b) \u5982\u679c\u6309\u65f6\u95f4\u5206\u533a\uff0c\u5efa\u8bae\u6309\u6708\u6216\u5e74\u8fdb\u884c\u5206\u533a\uff08\u5426\u5219\u4f1a\u5bfc\u81f4\u5206\u533a\u6570\u8fc7\u591a\uff09\uff1b\n<ul>\n<li>\u65e5\u671f\u6216\u65f6\u95f4\uff0c\u6bd4\u5982year\u3001month\u3001day\u6216\u8005hour\uff0c\u5f53\u8868\u4e2d\u5b58\u5728\u65f6\u95f4\u6216\u8005\u65e5\u671f\u5b57\u6bb5\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e9b\u5b57\u6bb5\uff1b<\/li>\n<li>\u5730\u7406\u4f4d\u7f6e\uff0c\u6bd4\u5982\u56fd\u5bb6\u3001\u7701\u4efd\u3001\u57ce\u5e02\u7b49\uff1b<\/li>\n<li>\u4e1a\u52a1\u903b\u8f91\uff0c\u6bd4\u5982\u90e8\u95e8\u3001\u9500\u552e\u533a\u57df\u3001\u5ba2\u6237\u7b49\u7b49\uff1b<\/li>\n<\/ul>\n<\/li>\n<li>c) \u4e0d\u63a8\u8350\u4f7f\u7528\u591a\u7ea7\u5206\u533a\uff1b<\/li>\n<li>d) \u6bcf\u4e2a\u5206\u533a\u5bf9\u5e94\u7684\u662fHDFS\u4e0a\u7684\u4e00\u4e2a\u6587\u4ef6\u5939\uff1b<\/li>\n<li>e) \u5206\u533a\u6570*\u5206\u6876\u6570\uff0c\u4e0d\u5efa\u8bae\u8d85\u8fc710000\uff1b<\/li>\n<\/ul>\n<h5><strong>iii \u5206\u533a\u7684\u597d\u5904<\/strong><\/h5>\n<ul>\n<li>a) \u6761\u4ef6\u8fc7\u6ee4\u65f6\uff0c \u5982\u679c\u8fc7\u6ee4\u5b57\u6bb5\u548c\u5206\u533a\u5b57\u6bb5\u4e00\u81f4\uff0c\u53ef\u5b9e\u73b0PartitionPruner\u4e5f\u5c31\u662f\u5206\u533a\u88c1\u526a\uff0c\u800c\u4e0d\u7528\u641c\u7d22\u6240\u6709\u7684\u5206\u533a\u6587\u4ef6\u5939\uff0c\u6709\u5f88\u9ad8\u7684\u67e5\u8be2\u6548\u7387\u3002\u6240\u4ee5\u5206\u533a\u5b57\u6bb5\u53ef\u4ee5\u9002\u5f53\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\u3002<\/li>\n<\/ul>\n<h5><strong>iiii \u5206\u533a\u8fc7\u591a\u7684\u5f0a\u7aef<\/strong><\/h5>\n<ul>\n<li>\n<p>a) \u5927\u91cf\u5206\u533a\u4f1a\u521b\u5efa\u5927\u91cf\u7684\u975e\u5fc5\u987b\u7684hdfs\u6587\u4ef6\u548c\u6587\u4ef6\u5939\uff0c\u4e00\u4e2a\u5206\u533a\u5c31\u5bf9\u5e94\u7740\u5305\u542b\u6709\u591a\u4e2a\u6587\u4ef6\u7684\u6587\u4ef6\u5939\u3002\u5982\u679c\u6307\u5b9a\u7684\u8868\u5b58\u5728\u6570\u767e\u4e2a\u5206\u533a\uff0c\u90a3\u4e48\u53ef\u80fd\u6bcf\u5929\u90fd\u4f1a\u521b\u5efa\u597d\u51e0\u4e07\u4e2a\u6587\u4ef6\u3002\u5982\u679c\u4fdd\u6301\u8fd9\u6837\u7684\u8868\u5f88\u591a\u5e74\uff0c\u90a3\u4e48\u6700\u7ec8\u5c31\u4f1a\u8d85\u51faNamenode\u5bf9\u7cfb\u7edf\u5143\u6570\u636e\u4fe1\u606f\u7684\u5904\u7406\u80fd\u529b\u3002\u56e0\u4e3aNamenode\u5fc5\u987b\u8981\u5c06\u6240\u6709\u7684\u7cfb\u7edf\u6587\u4ef6\u7684\u5143\u6570\u636e\u4fe1\u606f\u4fdd\u5b58\u5728\u5185\u5b58\u5185\u3002\u867d\u7136\u6bcf\u4e2a\u6587\u4ef6\u53ea\u9700\u8981\u5c11\u91cf\u5b57\u8282\u5927\u5c0f\u7684\u5143\u6570\u636e\uff08\u5927\u7ea6\u662f150\u5b57\u8282\/\u6587\u4ef6\uff09\uff0c\u4f46\u662f\u8fd9\u6837\u4e5f\u4f1a\u9650\u5236\u4e00\u4e2aHDFS\u5b9e\u4f8b\u6240\u80fd\u7ba1\u7406\u7684\u6587\u4ef6\u603b\u6570\u7684\u4e0a\u9650\uff1b<\/p>\n<\/li>\n<li>\n<p>b) MapReduce\u4f1a\u5c06\u4e00\u4e2a\u4efb\u52a1\uff08job\uff09\u8f6c\u6362\u6210\u591a\u4e2a\u4efb\u52a1\uff08task\uff09\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2atask\u90fd\u662f\u4e00\u4e2a\u65b0\u7684JVM\u5b9e\u4f8b\uff0c\u90fd\u9700\u8981\u5f00\u542f\u548c\u9500\u6bc1\u7684\u5f00\u9500\u3002\u5bf9\u4e8e\u5c0f\u6587\u4ef6\uff0c\u6bcf\u4e2a\u6587\u4ef6\u90fd\u4f1a\u5bf9\u5e94\u4e00\u4e2atask\uff0cJVM\u5f00\u542f\u548c\u9500\u6bc1\u7684\u65f6\u95f4\u4e2d\u9500\u6bc1\u53ef\u80fd\u4f1a\u6bd4\u5b9e\u9645\u5904\u7406\u6570\u636e\u7684\u65f6\u95f4\u6d88\u8017\u8981\u957f\uff01<\/p>\n<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c\u4e00\u4e2a\u7406\u60f3\u7684\u5206\u533a\u65b9\u6848\u4e0d\u5e94\u8be5\u5bfc\u81f4\u4ea7\u751f\u592a\u591a\u7684\u5206\u533a\u548c\u6587\u4ef6\u5939\u76ee\u5f55\uff0c\u5e76\u4e14\u6bcf\u4e2a\u76ee\u5f55\u4e0b\u7684\u6587\u4ef6\u5e94\u8be5\u8db3\u591f\u5f97\u5927\uff0c\u5e94\u8be5\u662f\u6587\u4ef6\u7cfb\u7edf\u4e2d\u5757\u5927\u5c0f\u7684\u82e5\u5e72\u500d\u3002<br \/>\n\u6309\u7167\u65f6\u95f4\u8303\u56f4\u8fdb\u884c\u5206\u533a\u7684\u4e00\u4e2a\u597d\u7684\u7b56\u7565\u5c31\u662f\u6309\u7167\u4e0d\u540c\u7684\u65f6\u95f4\u7c92\u5ea6\u6765\u786e\u5b9a\u5408\u9002\u5927\u5c0f\u7684\u6570\u636e\u79ef\u7d2f\u91cf\uff0c\u800c\u4e14\u6309\u7167\u8fd9\u4e2a\u65f6\u95f4\u7c92\u5ea6\uff0c\u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\uff0c\u5206\u533a\u6570\u91cf\u7684\u589e\u957f\u662f\u201c\u5747\u5300\u7684\u201d\uff0c\u800c\u4e14\u6bcf\u4e2a\u5206\u533a\u4e0b\u5305\u542b\u7684\u6587\u4ef6\u5927\u5c0f\u81f3\u5c11\u662f\u6587\u4ef6\u7cfb\u7edf\u4e2d\u5757\u7684\u5927\u5c0f\u6216\u8005\u5757\u5927\u5c0f\u7684\u6570\u500d\uff0c\u8fd9\u4e2a\u5e73\u8861\u53ef\u4ee5\u4fdd\u6301\u4f7f\u5206\u533a\u8db3\u591f\u5927\uff0c\u4ece\u800c\u4f18\u5316\u4e00\u822c\u60c5\u51b5\u4e0b\u67e5\u8be2\u7684\u6570\u636e\u541e\u5410\u91cf\u3002\u540c\u4e8b\u6709\u5fc5\u8981\u8003\u8651\u8fd9\u79cd\u7c92\u5ea6\u7ea7\u522b\u5728\u672a\u6765\u662f\u5426\u9002\u7528\uff0c\u7279\u522b\u662f\u67e5\u8be2\u4e2dwhere\u5b50\u53e5\u9009\u62e9\u8f83\u5c0f\u7c92\u5ea6\u7684\u60c5\u51b5<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981\u63cf\u8ff0 \u6211\u4eec\u77e5\u9053\u4f20\u7edf\u7684DBMS\u7cfb\u7edf\u4e00\u822c\u90fd\u5177\u6709\u8868\u5206\u533a\u7684\u529f\u80fd\uff0c\u901a\u8fc7\u8868\u5206\u533a\u80fd\u591f\u5728\u7279\u5b9a\u7684\u533a\u57df\u68c0\u7d22\u6570\u636e\uff0c\u51cf\u5c11\u626b\u63cf\u6210\u672c\uff0c ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/kbwp.transwarp.cn\/?p=5742\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[121],"tags":[],"class_list":["post-5742","post","type-post","status-publish","format-standard","hentry","category-121"],"acf":[],"_links":{"self":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/5742","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5742"}],"version-history":[{"count":4,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/5742\/revisions"}],"predecessor-version":[{"id":17755,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/5742\/revisions\/17755"}],"wp:attachment":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5742"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5742"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5742"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}