{"id":115210,"date":"2026-10-11T14:12:13","date_gmt":"2026-10-11T06:12:13","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/115210.html"},"modified":"2026-10-11T14:12:13","modified_gmt":"2026-10-11T06:12:13","slug":"%e8%b5%84%e6%ba%90%e5%88%86%e5%b1%82%e5%85%b3%e9%97%ad%e4%bd%93%e7%b3%bb%e3%80%81tcp%e8%bf%9e%e6%8e%a5%e5%ad%98%e6%b4%bb%e6%8e%a2%e6%b5%8b%e4%b8%8e%e8%b4%9f%e8%bd%bd%e5%9d%87%e8%a1%a1%e6%9c%ba","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/115210.html","title":{"rendered":"\u8d44\u6e90\u5206\u5c42\u5173\u95ed\u4f53\u7cfb\u3001TCP\u8fde\u63a5\u5b58\u6d3b\u63a2\u6d4b\u4e0e\u8d1f\u8f7d\u5747\u8861\u673a\u5236\u4ecb\u7ecd"},"content":{"rendered":"

\"\"\"\"\"\"<\/p>\n

\u6587\u7ae0\u76ee\u5f55<\/p>\n

\u4e00\u3001\u8d44\u6e90\u4ece\u4e0a\u5f80\u4e0b\u5173\u95ed<\/p>\n

1.\u5e94\u7528\u5c42Socket\u89c6\u89d2\u4e0b\u7684\u5173\u95ed<\/p>\n

1.1Socket\u81ea\u5df1\u5173\u95ed\u65f6\u7528\u7684API<\/p>\n

1.1.1Socket.flush<\/p>\n

1.1.2Socket.close<\/p>\n

1.2\u8fdb\u7a0b\u5d29\u6e83\u65f6Socket\u88ab\u52a8\u7684\u5173\u95ed<\/p>\n

1.2.1\u65e0\u6289\u8feb\u5212\u5f53\u73b0\u53d1\u9001\u8fb9\u754c<\/p>\n

1.2.2\u65e0\u5f15\u7528\u540e\u9047\u8d70\u91ca\u653e\u6d41\u7a0b<\/p>\n

2.\u4f20\u8f93\u5c42TCP\u8fde\u63a5\u89c6\u89d2\u4e0b\u7684\u5173\u95ed<\/p>\n

2.1\u6b63\u5e38\u5173\u95ed\u673a\u5236<\/p>\n

2.1.1FIN\u62a5\u6587<\/p>\n

2.1.1.1\u6536\u53d1<\/p>\n

2.1.1.2\u5206\u5173<\/p>\n

2.1.1.3\u53ef\u9760<\/p>\n

2.1.2\u5148\u6325\u65b9\u6700\u540e\u4e00\u4e2aACK\u62a5\u6587<\/p>\n

2.1.2.1\u62a5\u6587\u7684\u786e\u8fbe\u4e0d\u5b9a<\/p>\n

2.1.2.2ACK\u7684\u5360\u6bd4\u4fdd\u969c<\/p>\n

2.1.2.2.1\u65b9\u5f0f<\/p>\n

2.1.2.2.2\u9009\u62e9<\/p>\n

2.2\u5f02\u5e38\u4e2d\u6b62\u673a\u5236<\/p>\n

2.2.1RST\u62a5\u6587<\/p>\n

2.2.1.1\u6536\u53d1<\/p>\n

2.2.1.2\u5e76\u5173<\/p>\n

2.2.1.3\u4e0d\u53ef\u9760<\/p>\n

2.2.1.4\u53d1\u9001\u60c5\u51b5<\/p>\n

2.2.1.4.1\u8fde\u63a5\u4e0d\u5b58\u5728<\/p>\n

2.2.1.4.2\u9047\u5230\u5f02\u5e38\u9519\u8bef<\/p>\n

3.\u5173\u673a\u7684\u9650\u65f6\u5173\u95ed<\/p>\n

3.1\u7b2c\u4e00\u9650\u65f6<\/p>\n

3.1.1\u9650\u65f6\u5185<\/p>\n

3.1.2\u8d85\u65f6\u540e<\/p>\n

3.2\u7b2c\u4e8c\u4e2a\u9650\u65f6<\/p>\n

3.2.1\u9650\u65f6\u5185<\/p>\n

3.2.2\u8d85\u65f6\u540e<\/p>\n

\u4e8c\u3001\u9760\u56de\u5e94\u9a8c\u8fde\u63a5<\/p>\n

1.\u7ef4\u62a4\u4e0d\u786e\u6548\u8fde\u63a5\u7684\u65f6\u95f4<\/p>\n

1.1\u65e0\u6548\u8fde\u63a5\u7684\u6d6a\u8d39\u7ef4\u62a4<\/p>\n

1.1.1\u5f02\u5e38\u65f6\u673a\u7684\u6d6a\u8d39\u91cf\u5f71\u54cd<\/p>\n

2.\u53d1\u9001\u9891\u7387<\/p>\n

2.1\u6b63\u5e38\u95f4\u9694\u53d1\u9001\u6d88\u606f<\/p>\n

2.2\u95f4\u9694\u5f88\u4e45\u53d1\u9001\u6d88\u606f<\/p>\n

2.2.1\u6d6a\u7ef4\u98ce\u9669<\/p>\n

2.2.2\u5fc3\u8df3\u63aa\u65bd<\/p>\n

2.2.2.1\u4f20\u8f93\u5c42keepalive<\/p>\n

2.2.2.1.1\u8fc7\u7a0b<\/p>\n

2.2.2.1.2\u4f5c\u7528<\/p>\n

2.2.2.1.3\u5c40\u9650<\/p>\n

2.2.2.2\u5e94\u7528\u5c42\u5fc3\u8df3\u5305<\/p>\n

2.2.2.2.1\u4f18\u52bf<\/p>\n

2.2.2.2.2\u52a3\u52bf<\/p>\n

2.2.2.3\u5fc3\u8df3\u6296\u52a8jitter<\/p>\n

\u4e09\u3001\u8d1f\u8f7d\u5747\u8861\u5668<\/p>\n

1.\u5065\u5eb7\u68c0\u67e5<\/p>\n

1.1\u7ecf\u53d7\u5e72\u6270<\/p>\n

1.1.1\u5de5\u7a0b\u5e73\u8861<\/p>\n

2.\u9009\u51fa\u670d\u52a1<\/p>\n

3.\u6728\u677f\u8d44\u6e90\u74f6\u9888<\/p>\n

4.\u5b89\u5168\u91cd\u4f20\u8bf7\u6c42<\/p>\n

\u56db\u3001URG\u4e0ePSH<\/p>\n

1.URG=Urgent<\/p>\n

2.PSH=Push<\/p>\n

\n

\u4e00\u3001\u8d44\u6e90\u4ece\u4e0a\u5f80\u4e0b\u5173\u95ed<\/span><\/h2>\n

\"\"<\/p>\n

1.\u5e94\u7528\u5c42Socket\u89c6\u89d2\u4e0b\u7684\u5173\u95ed<\/span><\/h3>\n

\u8fdb\u7a0bSocket\u5bf9\u8c61\u662f\u91cc\u9762\u88c5\u5f15\u7528\u7684\u666e\u901a\u53d8\u91cf，\u6587\u4ef6\u63cf\u8ff0\u7b26\u3001\u5185\u6838Socket\u5bf9\u8c61\u662f\u5f15\u7528\u5bf9\u8c61\u53d8\u91cf<\/span><\/p>\n

1.1Socket\u81ea\u5df1\u5173\u95ed\u65f6\u7528\u7684API<\/span><\/h4>\n
1.1.1Socket.flush<\/span><\/h5>\n

Socket.flush\u662f\u5e94\u7528\u5c42\u81ea\u5df1\u51b3\u5b9a,\u73b0\u5728\u4e00\u6b21\u628a\u6b64\u65f6\u7684\u5e94\u7528\u5c42\u7528\u6237\u6001\u7f13\u51b2\u533a\u91cc\u7684\u5168\u90e8\u6570\u636e,\u51b2\u5165\u5230\u4f20\u8f93\u5c42\u53d1\u9001\u7f13\u51b2\u533a\u91cc，\u8fdb\u884c\u5bf9,\u7528\u6237\u6001\u7f13\u51b2\u533a->\u53d1\u9001\u7f13\u51b2\u533a\u7684\u81ea\u7136\u6d41\u901f,\u5f53\u533a\u91cf\u8fc5\u901f\u53d1\u5b8c\u5730\u63d0\u901f<\/span><\/p>\n

\n
1.1.2Socket.close<\/span><\/h5>\n

Socket.close\u662f\u5e94\u7528\u5c42\u81ea\u5df1\u51b3\u5b9a \u73b0\u5728\u81ea\u5df1\u5173\u95edSocket\u5bf9\u8c61,\u653eFIN\u5212\u51fa\u8fd9\u6837\u7684\u53d1\u9001\u8fb9\u754c\u7684：<\/span><\/p>\n

  • \u5904FIN\u524d：\u8fd8\u5728\u53d1\u9001\u7f13\u51b2\u533a\u91cc\u4e0e\u8fd8\u5728\u53d1\u9001\u5206\u6d41\u4e2d\u672a\u5230\u8fbe\u5bf9\u65b9\u6570\u636e\u4e3a\u9884\u5269\u53d1\u9001\u6570\u636e<\/span><\/li>\n
  • \u5904FIN\u540e：\u8fd8\u5728\u5e94\u7528\u5c42\u7528\u6237\u6001\u7f13\u51b2\u533a\u91cc\u7684\u6570\u636e\u6210\u9057\u5f03\u4e0d\u53d1\u6570\u636e<\/span><\/li>\n
    \n

    1.2\u8fdb\u7a0b\u5d29\u6e83\u65f6Socket\u88ab\u52a8\u7684\u5173\u95ed<\/span><\/h4>\n
    1.2.1\u65e0\u6289\u8feb\u5212\u5f53\u73b0\u53d1\u9001\u8fb9\u754c<\/span><\/h5>\n

    \u8fdb\u7a0b\u5d29\u6e83,\u91cc\u9762\u7684\u5806\u533a\u6bc1\u6389,Socket\u53d8\u91cf\u4e00\u540c\u6bc1\u6ca1，\u4e0d\u6309\u81ea\u5df1\u6289\u62e9\u5730\u73b0\u5728\u5c31\u653eFIN\u5212\u5f53\u73b0\u53d1\u9001\u8fb9\u754c，\u5c31\u653e\u6f0f\u4e86 \u5904\u5728\u5f53\u73b0\u540e\u9762,\u6289\u62e9\u4e2d\u6709\u8fdb\u884c\u7684：<\/span><\/p>\n

  • \u5e94\u7528\u5c42\u6570\u636e\u7684\u5f53\u540e\u518d\u66f4\u65b0<\/span><\/li>\n
  • \u5e94\u7528\u5c42\u5f80\u4f20\u8f93\u5c42\u5f53\u540e\u518d\u6d41\u8c03\u7684\u6570\u636e\u5206\u5e03<\/span><\/li>\n
  • \u5f53\u540e\u518d\u5212\u51fa,\u5728\u90a3\u65f6\u662f\u90a3\u6837\u7684\u81ea\u5df1\u9009\u62e9\u7684\u53d1\u9001\u8fb9\u754c<\/span><\/li>\n
    \n
    1.2.2\u65e0\u5f15\u7528\u540e\u9047\u8d70\u91ca\u653e\u6d41\u7a0b<\/span><\/h5>\n

    Socket\u53d8\u91cf\u6ca1\u4e86\u4e4b\u540e，\u5b83\u4e00\u5bf9\u4e00\u5bf9\u5e94\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u5f15\u7528\u5bf9\u8c61\u4e5f\u6ca1\u4e86，\u7b49\u5230\u5185\u6838Socket\u5f15\u7528\u5bf9\u8c61\u5b83\u4e00\u5bf9\u591a\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u5168\u90e8\u6ca1\u4e86,Socket\u5bf9\u8c61\u65e0\u5f15\u7528\u8fdb\u5165\u91ca\u653e\u6d41\u7a0b，\u9047\u5230\u8d70\u5176\u4e2d\u4e00\u4e2a：<\/span><\/p>\n

      \n
    • \u4f20FIN\u8fdb\u884c\u56db\u6b21\u6325\u624b\u5730\u91ca\u653e<\/span><\/li>\n
    • \u4f20RST\u8fdb\u884c\u5f97\u77e5\u5c31\u4e2d\u6b62\u5730\u91ca\u653e<\/span><\/li>\n
    • \u8d85\u65f6ACK\u8fdb\u884c\u5f02\u5e38\u5730\u5904\u7406<\/span><\/li>\n<\/ul>\n
      \n

      2.\u4f20\u8f93\u5c42TCP\u8fde\u63a5\u89c6\u89d2\u4e0b\u7684\u5173\u95ed<\/span><\/h3>\n

      TCP\u628a\u7ec8\u6b62\u5206\u6210：<\/span> \"\"<\/p>\n

      2.1\u6b63\u5e38\u5173\u95ed\u673a\u5236<\/span><\/h4>\n

      \u8c03\u7528close\u4f7f\u7528FIN\u62a5\u6587，\u5728\u8d70\u6325\u624b\u6d41\u7a0b，\u786e\u4fdd\u53d1\u9001\u6570\u636e\u5904\u7406\u5b8c\u5730\u6b63\u5e38\u5173\u95ed，\u89e3\u51b3\u7684\u662f"\u8fd8\u80fd\u901a\u4fe1\u65f6，\u600e\u6837\u6709\u5e8f\u544a\u522b"\u7684\u573a\u666f<\/span><\/p>\n

      2.1.1FIN\u62a5\u6587<\/span><\/h5>\n
      2.1.1.1\u6536\u53d1<\/span><\/h6>\n
    • \u4f20\u8f93\u5c42：\u4f20\u8f93\u5c42\u5728\u8fde\u63a5\u6d41\u53d1\u9001,\u63a5\u6536FIN \u4f1a\u5173\u5212\u53d1\u6536\u901a\u9053\u7684<\/span><\/li>\n
    • \u5e94\u7528\u5c42：\u5e94\u7528\u5c42\u53d6\u5b8c\u63a5\u6536\u7f13\u51b2\u533a\u7684\u6240\u6709FIN\u524d\u6570\u636e\u540e\u5f97\u5230EOF<\/span><\/li>\n
      \n
      2.1.1.2\u5206\u5173<\/span><\/h6>\n

      \u6bcf\u7aef\u7684\u53d1\u9001\u3001\u63a5\u6536\u6d41 \u662f\u5206\u5f00\u5730\u7ed3\u675f\u7684<\/span><\/p>\n

      \n
      2.1.1.3\u53ef\u9760<\/span><\/h6>\n

      FIN\u662f\u53ef\u9760\u4f20\u8f93，\u5355\u6b21\u91cc\u53ef\u4ee5\u53d1\u591a\u4e2a,\u76f4\u5230\u786e\u8ba4\u5230\u8fbe<\/span><\/p>\n

      \n
      2.1.2\u5148\u6325\u65b9\u6700\u540e\u4e00\u4e2aACK\u62a5\u6587<\/span><\/h5>\n
      2.1.2.1\u62a5\u6587\u7684\u786e\u8fbe\u4e0d\u5b9a<\/span><\/h6>\n

      '<\/span>\u53bb\u786e\u5b9a\u62a5\u6587\u80fd\u5426\u5230\u8fbe'\u672c\u8eab\u5c31\u662f\u65e0\u6cd5\u786e\u5b9a\u80fd\u5b8c\u6210\u7684\u4e8b，\u6240\u6709\u62a5\u6587\u7684\u786e\u8ba4，\u8981\u4e48\u6536\u5230ACK\u5c31\u80fd100%\u786e\u8ba4\u5230\u5b83\u5df2\u9001\u8fbe，\u8981\u4e48\u6536\u4e0d\u5230ACK\u5c31\u65e0\u6cd5\u786e\u8ba4\u5b83\u6709\u6ca1\u6709\u5230\u8fbe（\u6ca1\u6709\u80fd100%\u786e\u8ba4\u5230\u5b83\u6ca1\u9001\u8fbe\u7684）<\/span><\/p>\n

      \n
      2.1.2.2ACK\u7684\u5360\u6bd4\u4fdd\u969c<\/span><\/h6>\n
      2.1.2.2.1\u65b9\u5f0f<\/span><\/h6>\n

      2.1.2.2.1.1TIME_WAIT\u7b49\u5f852MSL<\/span><\/p>\n

      TIME_WAIT-2MSL，\u9009\u62e9\u4fdd\u6301\u8fde\u63a5\u5148\u4e0d\u5173\u95ed\u548c\u4fdd\u6301\u7684\u65f6\u95f4\u662f2MSL：<\/span><\/p>\n

    • \u662f\u4e00\u79cd\u653e\u5f03\u4e86 \u53bb\u786e\u8ba4 ACK\u62a5\u6587\u7684,\u5982\u679c\u9001\u8fbe\u4e14\u80fd\u6536\u5230\u7684\u505c\u6b62\u6298\u817e\u4f9d\u636e<\/span><\/li>\n
    • \u800c\u662f\u9009\u62e9\u4e3b\u52a8\u505c\u4e0b\u6298\u817e\u3001\u4ee5\u5f88\u5c0f\u7684\u6210\u672c\u3001\u540c\u6837\u5360"\u5982\u679c\u80fd\u5230\u8fbe\u7684\u4fdd\u969c\u6bd4\u4f8b"\u5f88\u5927\u5730\u6392\u6389\u4e86\u5076\u7136\u56e0\u7d20 \u5730\u53bb\u4fdd\u969c<\/span><\/li>\n
      \n

      2.1.2.2.1.2\u4f7f\u7528\u5176\u5b83\u62a5\u6587\u907f\u514d\u8bbe\u8ba1ACK\u9012\u5f52\u5730\u91cd\u4f20\u4fdd\u969c<\/span><\/p>\n

      \u786e\u8ba4ACK\u5230\u8fbe，\u5176\u5b9e\u4e5f\u53ef\u4ee5\u8bbe\u8ba1\u6210\u4e0d\u7528ACK\u62a5\u6587，\u7528\u522b\u7684\u62a5\u6587 \u518d\u6765\u4e00\u6b21\u62a5\u6587\u7684\u6709\u8d85\u65f6\u91cd\u4f20\u4fdd\u969c\u7684\u786e\u8ba4\u5230\u8fbe，\u5c31\u4e0d\u4f1a\u6709\u628aACK\u62a5\u6587\u8bbe\u8ba1\u6210\u9012\u5f52\u786e\u8ba4\u7684\u95ee\u9898：<\/span><\/p>\n

    • \u80fd\u5360"\u5982\u679c\u80fd\u5230\u8fbe\u7684\u4fdd\u969c\u6bd4\u4f8b"\u5f88\u5927<\/span><\/li>\n
    • \u4e14\u6839\u636e\u5982\u679cACK\u80fd\u5230\u8fbe\u7684\u4e14\u5982\u679c\u80fd\u786e\u8ba4\u5230\u4f9d\u636e\u800c\u505c\u6b62\u6298\u817e,\u5426\u5219\u7ee7\u7eed\u5f80\u4e0b\u6298\u817e\u5230\u8d85\u91cf\u624d\u505c\u6b62<\/span><\/li>\n
      \n

      2.1.2.2.1.3\u505a\u4ec5\u6b64ACK\u6709\u7684\u7279\u6b8a\u6807\u8bb0\u907fACK\u9012\u5f52\u5730\u91cd\u4f20<\/span><\/p>\n

      \u6216\u8005\u5bf9\u5148\u6325\u65b9\u7684\u8fd9\u4e2a\u6700\u540e\u53d1\u7684ACK\u62a5\u6587\u505a\u7279\u6b8a\u6807\u8bb0\u5904\u7406，\u53ea\u8ba9\u5b83\u8fd9\u65f6\u7684ACK\u62a5\u6587\u53ef\u4ee5\u7ee7\u7eed\u6709ACK\u7684\u786e\u8ba4\u56de\u590d\u673a\u5236，\u7136\u540e\u4e5f\u662f\u80fd\u5bf9\u5b83\u8fdb\u884c\u591a\u6b21\u7684\u91cd\u4f20\u786e\u8ba4：<\/span><\/p>\n

    • \u4e5f\u662f\u80fd\u5360"\u5982\u679c\u80fd\u5230\u8fbe\u7684\u4fdd\u969c\u6bd4\u4f8b"\u5f88\u5927\u5e76<\/span><\/li>\n
    • \u4e14\u4e5f\u6839\u636e\u5982\u679cACK\u80fd\u5230\u8fbe\u7684\u80fd\u786e\u8ba4\u5230\u7684\u4e14\u5982\u679c\u80fd\u786e\u8ba4\u5230\u4f9d\u636e\u800c\u505c\u6b62\u6298\u817e,\u5426\u5219\u7ee7\u7eed\u5f80\u4e0b\u6298\u817e\u5230\u8d85\u91cf\u624d\u505c\u6b62<\/span><\/li>\n
      \n
      2.1.2.2.2\u9009\u62e9<\/span><\/h6>\n

      TCP\u534f\u8bae\u91cc\u9009\u62e9\u4e86\u4f7f\u7528TIME_WAIT\u7b49\u5f852MSL\u7684\u4fdd\u969c\u65b9\u5f0f，\u56e0\u4e3a\u989d\u5916\u7684\u8bbe\u8ba1\u5b9e\u73b0\u6210\u672c\u5c0f，\u5e76\u4e14\u6211\u65b9\u5c3d\u5f88\u5927"\u5982\u679c\u80fd\u5230\u8fbe\u7684\u4fdd\u969c\u6bd4\u4f8b"\u540e，\u6211\u65b9\u6ca1\u6709\u53bb\u4f9d\u636e,\u786e\u8ba4\u5230ACK\u9001\u8fbe\u540e\u518d\u505c\u6b62\u6298\u817e,\u800c\u662f\u4e3b\u52a8\u505c\u4e0b\u6298\u817e<\/span><\/p>\n

      2.1.2.2.2.1\u539f\u56e0<\/span><\/p>\n

      \u56e0\u4e3a\u5373\u4f7f\u5982\u679c\u5b83\u4e5f\u53bb\u786e\u8ba4\u5230\u8fbe\u4f9d\u636e：<\/span><\/p>\n

        \n
      • \u5982\u679c\u786e\u8ba4\u9001\u8fbe\u4e86,\u662f\u505c\u6b62\u6298\u817e\u63a5\u7740\u53bb\u5355\u65ad<\/span><\/li>\n
      • \u5982\u679c\u6ca1\u6709\u786e\u8ba4\u5230\u9001\u8fbe，\u6b64\u65f6\u4e5f\u5df2\u7ecf\u5c3d\u5f88\u5927\u4fdd\u969c\u6bd4\u4f8b\u4e86：\u672c\u8eab\u5b83\u5982\u679c\u5230\u8fbe,\u80fd\u786e\u8ba4\u5230\u5b83\u5230\u8fbe\u672c\u8eab\u662f\u4e2a\u6982\u7387\u4e8b\u4ef6,\u800c\u4e14\u7ecf\u8fc7\u5f88\u5927\u4fdd\u969c\u6bd4\u4f8b\u540e\u90fd\u6ca1\u786e\u8ba4\u5230,\u5927\u6982\u7387\u540e\u9762\u4e5f\u662f\u65e0\u6cd5\u518d\u786e\u8ba4\u5230\u4e86,\u4f46\u6ca1\u6709\u6536\u5230\u4f9d\u636e\u5c31\u5f97\u7ee7\u7eed\u6298\u817e\u4e0b\u53bb\u5230\u8d85\u91cf\u3001\u800c\u4e14\u7ecf\u8fc7\u53d1\u9001\u5f88\u5927\u4fdd\u969c\u540e,\u5b83ACK\u5b9e\u9645\u7ed3\u679c\u80fd\u9001\u8fbe\u7684\u6982\u7387\u4e5f\u5f88\u5927\u4e86<\/span><\/li>\n<\/ul>\n
        \n

        2.1.2.2.2.2\u6548\u679c<\/span><\/p>\n

        \u56e0\u6b64\u6b64\u65f6\u9009\u62e9\u4e3b\u52a8\u505c\u4e0b\u6298\u817e，\u4e0d\u4ee5\u786e\u8ba4ACK\u5230\u8fbe\u800c\u4f5c\u4e3a\u505c\u6b62\u4f9d\u636e \u800c\u9677\u5165\u66f4\u6df1\u7684,\u4ec5\u4e3a\u4e86\u6211\u65b9\u8981\u786e\u5b9a\u5230,\u800c\u5b9e\u9645\u53ef\u80fd\u5df2\u9001\u8fbe,\u5b9e\u9645\u4e0a\u5f88\u591a\u65f6\u5019\u6839\u672c\u65e0\u6cd5\u786e\u5b9a\u7684 \u8d85\u91cf\u6298\u817e，\u6b64\u65f6\u5c31\u5df2\u7ecf\u82b1\u8d39\u6700\u597d\u7684\u4fdd\u969c\u6210\u672c\u6548\u7387\u5730,\u53d6\u820d\u53ef\u80fd\u5bf9\u65b9\u786e\u5b9e\u6ca1\u6709\u6536\u5230ACK\u5730\u82b1\u8d39\u66f4\u5927\u5de8\u5927\u4ee3\u4ef7\u4fee\u590d\u5730,\u53bb\u5355\u65ad\u8fde\u63a5\u4e86<\/span><\/p>\n

        \n

        2.2\u5f02\u5e38\u4e2d\u6b62\u673a\u5236<\/span><\/h4>\n

        \u8c03\u7528abort\/reset\u4f7f\u7528RST\u62a5\u6587，\u4e0d\u8d70\u6325\u624b\u6d41\u7a0b，\u4e0d\u4fdd\u53d1\u9001\u6570\u636e\u6b63\u5e38\u5904\u7406\u5b8c\u5730,\u8fd9\u6761\u8fde\u63a5\u73b0\u5728\u7acb\u5373\u4f5c\u5e9f\u5730\u5f02\u5e38\u5173\u95ed，\u89e3\u51b3\u7684\u662f"\u8fde\u63a5\u9700\u8981\u7acb\u5373\u4f5c\u5e9f"\u7684\u573a\u666f<\/span><\/p>\n

        2.2.1RST\u62a5\u6587<\/span><\/h5>\n
        2.2.1.1\u6536\u53d1<\/span><\/h6>\n
      • \u4f20\u8f93\u5c42：\u4f20\u8f93\u5c42\u5728\u8fde\u63a5\u6d41\u53d1\u9001,\u63a5\u6536RST \u4f1a\u7acb\u5373\u4e2d\u6b62\u5355\u65ad\u8fde\u63a5\u7684<\/span><\/li>\n
      • \u5e94\u7528\u5c42：\u5f80\u4e0a\u7ed9\u5e94\u7528\u5c42\u62a5connection rest\u901a\u77e5<\/span><\/li>\n
        \n
        2.2.1.2\u5e76\u5173<\/span><\/h6>\n

        \u6bcf\u7aef\u7684\u53d1\u9001\u3001\u63a5\u6536\u6d41 \u662f\u4e00\u8d77\u5730\u7ed3\u675f\u7684<\/span><\/p>\n

        \n
        2.2.1.3\u4e0d\u53ef\u9760<\/span><\/h6>\n

        RST\u662f\u4e0d\u53ef\u9760\u4f20\u8f93，\u5355\u6b21\u4e00\u4e2a\u5c31\u53d1\u5b8c,\u5c31\u8981\u5728\u4e0b\u6b21\u91cc\u518d\u53d1\u4e0b\u4e2a\u4e86<\/span><\/p>\n

        \n
        2.2.1.4\u53d1\u9001\u60c5\u51b5<\/span><\/h6>\n
        2.2.1.4.1\u8fde\u63a5\u4e0d\u5b58\u5728<\/span><\/h6>\n

        \u4e3b\u673a\u5904\u4e8eCLOSE\u6216\u5904\u5728\u65b0\u5efa\u7684\u8fde\u63a5\u91cc\u65f6 \u6536\u5230 \u4e0d\u5728\u8be5\u8fde\u63a5\u7684\u522b\u7684\u8fde\u63a5\u91cc\u7684\u62a5\u6587\u65f6(\u5f88\u6709\u53ef\u80fd\u5c31\u662f,\u6211\u65b9\u4e0a\u4e00\u4e2a\u5df2\u7ecf\u5355\u65ad\u5f00\u7684\u65e7\u8fde\u63a5\u91cc\u7684,\u4e0d\u77e5\u60c5\u7684\u5bf9\u65b9,\u4ecd\u80fd\u7167\u7740\u6211\u65b9IP\u7aef\u53e3,\u53d1\u6765\u7684\u6d88\u606f)，\u6839\u636e\u6b64\u62a5\u6587\u7684\u6e90IP\u7aef\u53e3\u56db\u5143\u7ec4\u4fe1\u606f \u7ed9\u4ed6\u56de\u5e94RST,\u6211\u8fd9\u91cc\u6ca1\u6709\u4f60\u8fd9\u6761\u8fde\u63a5<\/span><\/p>\n

        \u5bf9\u65b9\u6536\u5230RST\u540e \u4fbf\u4f1a\u6e05\u7406\u6389\u8fd9\u4e2a\u65e7\u7684,\u662f\u534a\u6253\u5f00\u7684\u8fde\u63a5\u72b6\u6001<\/span><\/p>\n

        \n
        2.2.1.4.2\u9047\u5230\u5f02\u5e38\u9519\u8bef<\/span><\/h6>\n

        \u7a0b\u5e8f\u6216\u8005\u5185\u6838\u51fa\u73b0\u9519\u8bef，\u53ef\u4ee5\u9009\u62e9:\u4e0d\u518d\u4fdd\u8bc1\u5269\u4f59\u6570\u636e\u6b63\u5e38\u4ea4\u4ed8,\u76f4\u63a5\u4e2d\u6b62\u5355\u65ad\u6211\u65b9\u8fde\u63a5 \u53d1\u9001RST<\/span><\/p>\n

        \u5bf9\u65b9\u6536\u5230RST\u540e \u4e5f\u8ddf\u7740\u53bb\u5355\u7aef\u65ad\u5f00\u8fde\u63a5\u4e86<\/span><\/p>\n

        \n

        3.\u5173\u673a\u7684\u9650\u65f6\u5173\u95ed<\/span><\/h3>\n

        \u5173\u673a\u65f6，<\/span><\/p>\n

        3.1\u7b2c\u4e00\u9650\u65f6<\/span><\/h4>\n
        3.1.1\u9650\u65f6\u5185<\/span><\/h5>\n

        \u5bf9\u5173\u95ed\u8fdb\u7a0bSocket\u9009\u5212\u8fb9\u754c\u9650\u7b2c\u4e00\u4e2a\u65f6：\u901a\u77e5\u8fdb\u7a0b,\u8ba9\u5b83\u81ea\u5df1\u9009\u5212\u53d1\u9001\u8fb9\u754c\u5730\u5173\u95ed<\/span><\/p>\n

        \n
        3.1.2\u8d85\u65f6\u540e<\/span><\/h5>\n

        \u8d85\u65f6\u540e\u5d29\u6e83\u8fdb\u7a0b,\u88ab\u52a8\u76f4\u63a5\u5212\u53d1\u9001\u8fb9\u754c\u5730\u5173\u95ed<\/span><\/p>\n

        \n

        3.2\u7b2c\u4e8c\u4e2a\u9650\u65f6<\/span><\/h4>\n
        3.2.1\u9650\u65f6\u5185<\/span><\/h5>\n

        \u5bf9\u5173\u95ed\u6587\u4ef6\u63cf\u8ff0\u7b26->\u5185\u6838Socket\u5bf9\u8c61->TCB\u91ca\u653e\u8fde\u63a5 \u9650\u7b2c\u4e8c\u4e2a\u65f6：\u8fdb\u7a0b\u5173\u95ed\u540e,\u6309\u5b83\u81ea\u5df1\u65ad\u5f00\u8fde\u63a5\u7684\u6d41\u7a0b，\u9047\u5230\u54ea\u79cd\u60c5\u51b5\u5c31\u5e94\u5bf9\u5730\u8fdb\u53bb\u5904\u7406<\/span><\/p>\n

        \n
        3.2.2\u8d85\u65f6\u540e<\/span><\/h5>\n

        \u8d85\u65f6\u540e\u8be5\u5355\u7aef\u4e3b\u673a\u65ad\u7535 \u5c31\u4f1a\u76f4\u63a5\u6ca1\u4e86\u91cc\u9762\u7684 \u6240\u6709\u8fdb\u7a0b\u3001\u4e00\u4e2a\u5185\u6838\u91cc\u9762\u7684:\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868,TCP\u534f\u8bae\u6808\u53ca\u91cc\u9762\u7684TCB\u53ca\u7ef4\u62a4\u7684\u8fde\u63a5\u72b6\u6001<\/span><\/p>\n

        \n

        \u4e8c\u3001\u9760\u56de\u5e94\u9a8c\u8fde\u63a5<\/span><\/h2>\n

        \u6211\u65b9\u53d1\u9001\u6d88\u606f\u6536\u5230ACK\u56de\u5e94，\u8bf4\u660e：<\/span><\/p>\n

      • \u6211\u65b9\u80fd\u6b63\u5e38\u53d1\u6d88\u606f<\/span><\/li>\n
      • \u6d88\u606f\u80fd\u8fc7\u53bb<\/span><\/li>\n
      • \u5bf9\u65b9\u80fd\u6b63\u5e38\u6536\u6d88\u606f<\/span><\/li>\n
      • \u5bf9\u65b9\u80fd\u6b63\u5e38\u53d1\u6d88\u606f<\/span><\/li>\n
      • \u6d88\u606f\u80fd\u8fc7\u6765<\/span><\/li>\n
      • \u6211\u65b9\u80fd\u6b63\u5e38\u6536\u6d88\u606f<\/span><\/li>\n

        \u6211\u65b9\u5c31\u80fd\u68c0\u9a8c\u51fa\u6ca1\u6709\u5f02\u5e38，\u53cd\u4e4b\u6536\u4e0d\u5230ACK\u56de\u5e94\u5373\u68c0\u9a8c\u51fa\u6709\u5f02\u5e38<\/span><\/p>\n

        \u91cd\u4f20\u3001keepalive\u3001\u5e94\u7528\u5c42\u5fc3\u8df3，\u8fd9\u4e9b\u989d\u5916\u8865\u5145\u7684\u53d1\u9001\u6d88\u606f：<\/span><\/p>\n

      • \u91cd\u4f20\u662f\u6536\u4e0d\u5230\u56de\u5e94\u65f6 \u518d\u6b21\u8fdb\u4e00\u6b65\u7684\u8bd5\u63a2\u68c0\u9a8c<\/span><\/li>\n
      • \u5fc3\u8df3\u5305\u662f\u52a0\u901f\u5f00\u542f\u68c0\u9a8c \u8bd5\u63a2\u56de\u5e94\u5730 \u68c0\u9a8c\u8fde\u63a5\u53ef\u7528\u6027<\/span><\/li>\n

        \u7528\u4e8e\u201d\u6211\u65b9\u6839\u636e\u5bf9\u65b9\u56de\u5e94，\u63a8\u65ad\u8fde\u63a5\u80fd\u5426\u7528\u201d\u7684\u573a\u666f<\/span><\/p>\n

        1.\u7ef4\u62a4\u4e0d\u786e\u6548\u8fde\u63a5\u7684\u65f6\u95f4<\/span><\/h3>\n

        \u6211\u65b9 \u6536\u5230\u5bf9\u65b9ACK\u56de\u5e94\u6d88\u606f,\u7684\u63a5\u6536\u65f6\u95f4\u95f4\u9694，\u5c31\u662f\u6211\u65b9 \u4e0d\u786e\u5b9a\u8fde\u63a5\u662f\u5426\u6709\u6548\u65e0\u6548\u5730,\u7ef4\u62a4\u8fde\u63a5 \u7684\u65f6\u95f4<\/span><\/p>\n

        1.1\u65e0\u6548\u8fde\u63a5\u7684\u6d6a\u8d39\u7ef4\u62a4<\/span><\/h4>\n

        \u5982\u679c\u8fde\u63a5\u65e0\u6548\u4e86(\u6bd4\u5982\u5bf9\u65b9\u6302\u4e86\/\u901a\u4fe1\u9053\u8def\u65ad\u4e86)，\u5c31\u4f1a\u5728 \u6700\u540e\u4e00\u6b21\u7684\u4e0d\u786e\u6548\u8fde\u63a5\u7ef4\u62a4\u65f6\u95f4\u6bb5\u91cc： \u4e0a\u4e00\u6b21\u6536\u5230ACK\u56de\u5e94\u5f80\u540e，\u4ece\u8fde\u63a5\u5f00\u59cb\u5931\u6548\u7684\u67d0\u8282\u70b9\u4f4d\u7f6e\u5f00\u59cb，\u76f4\u5230\u540e\u9762\u6211\u65b9\u53d1\u9001\u6d88\u606f,\u8bd5\u63a2\u56de\u5e94\u8d85\u65f6\u6536\u4e0d\u5230ACK,\u786e\u5b9a\u51fa\u8fde\u63a5\u5931\u6548\u7684\u7ef4\u62a4\u6bb5\u7ed3\u5c3e，\u90fd\u4f1a\u662f\u6211\u65b9\u6d6a\u8d39\u7684\u65e0\u6548\u8fde\u63a5\u7ef4\u62a4<\/span><\/p>\n

        1.1.1\u5f02\u5e38\u65f6\u673a\u7684\u6d6a\u8d39\u91cf\u5f71\u54cd<\/span><\/h5>\n

        \u5f02\u5e38\u51fa\u73b0\u4f4d\u7f6e\u662f\u65e0\u6cd5\u63a7\u5236\u5e72\u9884\u7684，\u5f02\u5e38\u53ef\u51fa\u73b0\u5728 \u4e0a\u6b21\u6536\u5230\u5bf9\u65b9ACK\u56de\u5e94\u7684,\u4e0d\u786e\u6548\u7ef4\u62a4\u8fde\u63a5\u6bb5\u5934 \u5230 \u6700\u540e\u53d1\u9001\u6d88\u606f\u540e\u8d85\u65f6\u6536\u4e0d\u5230ACK\u56de\u5e94\u7684,\u786e\u65e0\u6548\u8fde\u63a5\u6bb5\u5c3e \u7684\u4efb\u610f\u4f4d\u7f6e：<\/span><\/p>\n

          \n
        • \u5982\u679c\u51fa\u73b0\u5f97\u9760\u524d,\u90a3\u4e48\u6d6a\u8d39\u7ef4\u62a4\u7684\u65f6\u95f4\u6bb5\u5c31\u5927<\/span><\/li>\n
        • \u5982\u679c\u51fa\u73b0\u5f97\u9760\u540e,\u90a3\u4e48\u6d6a\u8d39\u7ef4\u62a4\u7684\u65f6\u95f4\u6bb5\u5c31\u5c0f<\/span><\/li>\n<\/ul>\n
          \n

          2.\u53d1\u9001\u9891\u7387<\/span><\/h3>\n

          2.1\u6b63\u5e38\u95f4\u9694\u53d1\u9001\u6d88\u606f<\/span><\/h4>\n

          \u5982\u679c\u4e00\u65b9 \u662f\u6b63\u5e38\u9891\u7387\u53d1\u9001\u6d88\u606f,\u5c31\u662f\u6b63\u5e38\u95f4\u9694\u5730\u8bd5\u63a2\u56de\u5e94\u68c0\u9a8c\u5f02\u5e38，\u90a3\u4e48：<\/span><\/p>\n

        • \u5b83\u7684\u4e0d\u786e\u6548\u7ef4\u62a4\u65f6\u95f4\u4f1a\u6b63\u5e38<\/span><\/li>\n
        • \u6d6a\u8d39\u6bb5\u7b49\u6bd4\u4f8b\u4f4d\u7f6e\u51fa\u73b0,\u4f46\u5360\u7684\u603b\u6bb5\u5c0f,\u6d6a\u8d39\u7684\u98ce\u9669\u6210\u672c\u5c0f<\/span><\/li>\n
        • \u5f02\u5e38\u68c0\u6d4b\u7684\u95f4\u9694\u53ca\u65f6\u6027\u4e5f\u6b63\u5e38<\/span><\/li>\n
          \n

          2.2\u95f4\u9694\u5f88\u4e45\u53d1\u9001\u6d88\u606f<\/span><\/h4>\n
          2.2.1\u6d6a\u7ef4\u98ce\u9669<\/span><\/h5>\n

          \u5982\u679c\u4e00\u65b9\u95f4\u9694\u5f88\u4e45\u624d\u53d1\u9001\u6d88\u606f，\u90a3\u4e48\u4ece\u5b83\u4e0a\u4e00\u6b21\u6536\u5230ACK \u76f4\u5230\u5b83\u8fc7\u5b8c\u8d85\u957f\u65f6\u95f4\u95f4\u9694,\u4e0b\u6b21\u53d1\u9001\u6d88\u606f\u8bd5\u63a2ACK\u56de\u5e94：<\/span><\/p>\n

        • \u90fd\u662f\u5b83\u4e0d\u786e\u6548\u7ef4\u62a4\u7684\u8d85\u957f\u65f6\u95f4<\/span><\/li>\n
        • \u5982\u679c\u6709\u5f02\u5e38,\u5728\u8fd9\u4e48\u957f\u6bb5\u7684\u4efb\u610f\u4f4d\u7f6e\u51fa\u73b0,\u51fa\u73b0\u4f4d\u7f6e\u5f80\u540e\u6240\u5360\u6bd4\u4f8b\u90fd\u8fd8\u662f\u968f\u673a\u4e0d\u53d8\u7684,\u4f46\u603b\u6bb5\u53d8\u957f\u4e86,\u4e0d\u786e\u6548\u7ef4\u62a4\u6bb5\u2191*\u4e0d\u53d8\u6bd4\u4f8b,\u5bf9\u5e94\u7684\u6d6a\u8d39\u65f6\u95f4\u7684\u98ce\u9669\u6210\u672c\u662f\u53d8\u5927\u7684<\/span><\/li>\n
        • \u5f02\u5e38\u68c0\u67e5\u7684\u95f4\u9694\u53ca\u65f6\u6027\u662f\u7279\u522b\u665a\u7684<\/span><\/li>\n

          （\u800c\u5982\u679c\u51fa\u73b0\u5f02\u5e38，\u5bf9\u65b9\u6b63\u5e38\u9891\u7387\u53d1\u9001\u6d88\u606f\u7684\u8bdd，\u5f88\u5feb\u5c31\u53d1\u73b0\u6536\u4e0d\u5230\u56de\u590d，\u65e9\u65e9\u68c0\u6d4b\u5230\u5f02\u5e38\u5355\u65ad\u4e86，\u5f88\u5feb\u68c0\u6d4b\u51fa\u6709\u5f02\u5e38\u3001\u4e0d\u786e\u6548\u7ef4\u62a4\u7684\u65f6\u95f4\u77ed\u3001\u4e0d\u786e\u6548\u603b\u957f\u77ed,\u7b49\u5360\u4f8b\u51fa\u73b0\u7684\u6d6a\u8d39\u7ef4\u62a4\u98ce\u9669\u6210\u672c\u5c0f；\u800c\u5982\u679c\u5bf9\u65b9\u4e5f\u4e00\u6837\u95f4\u9694\u5f88\u4e45\u5730\u53d1\u6d88\u606f，\u90a3\u4e48\u53cc\u65b9\u4e00\u8d77*2）<\/span><\/p>\n

          \n
          2.2.2\u5fc3\u8df3\u63aa\u65bd<\/span><\/h5>\n
          2.2.2.1\u4f20\u8f93\u5c42keepalive<\/span><\/h6>\n

          \u5bf9\u4e8e\u4f1a\u95f4\u9694\u5f88\u4e45\u53d1\u9001\u6d88\u606f\u7684\u8fd9\u7aef，\u5e38\u5e38\u4f1a\u624b\u52a8\u914d\u7f6e\u4e0a\u4f20\u8f93\u5c42\u7684keepalive\u5fc3\u8df3,\u4fdd\u969c\u56de\u5e94\u68c0\u6d4b：<\/span><\/p>\n

          2.2.2.1.1\u8fc7\u7a0b<\/span><\/h6>\n

          \u5f53\u9694\u8fc7keepalive idle>=2h\u65f6\u95f4\u6ca1\u53d1\u9001\u6d88\u606f\u540e，\u5c31\u5728\u4f20\u8f93\u5c42\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u5236\u4f5ckeepalive probe\u5fc3\u8df3\u5305,\u4f7f\u7528\u4e00\u4e2a\u7279\u6b8a\u5e8f\u53f7SEQ=SND.NXT-1，\u4ece\u6211\u7aef\u4f20\u8f93\u5c42\u5f80\u4e0b\u5c01\u88c5\u53d1\u9001,\u4f20\u5230\u5bf9\u7aef\u63a5\u6536\u5f80\u4e0a\u5206\u7528,\u5728\u4f20\u8f93\u5c42\u5c31\u7531\u64cd\u4f5c\u7cfb\u7edf\u5904\u7406\u5b8c\u5730,\u4ece\u524d\u5f80\u540e\u68c0\u67e5\u5230\u5f53\u524d\u8fde\u7eed\u524d\u7f00\u5230\u7684\u5e8f\u53f7,\u5c31\u5f80\u4e0b\u5c01\u88c5\u56de\u590dACK\u56de\u5e94\u4e86<\/span><\/p>\n

          \n
          2.2.2.1.2\u4f5c\u7528<\/span><\/h6>\n

          \u5c31\u4fdd\u969c\u4e86\u53d1\u9001\u6d88\u606f\u6700\u5927keepalive idle\u95f4\u9694\u540e\u81f3\u5c11\u6709\u53d1\u6d88\u606f，\u9650\u4e0b\u4e86 \u53d1\u9001\u6d88\u606f\u7684\u6700\u5927\u65f6\u95f4\u95f4\u9694\u3001\u4e0d\u786e\u6548\u7ef4\u62a4\u7684\u6700\u5927\u65f6\u95f4\u3001\u5f02\u5e38\u68c0\u6d4b\u7684\u6700\u5927\u95f4\u9694\u65f6\u95f4<\/span><\/p>\n

          \n
          2.2.2.1.3\u5c40\u9650<\/span><\/h6>\n

          2.2.2.1.3.1\u5185\u5bb9\u5c11<\/span><\/p>\n

          \u53ea\u80fd\u63a2\u6d4b\u5230 \u5bf9\u65b9\u4f20\u8f93\u5c42<->\u6211\u65b9\u4f20\u8f93\u5c42\u7684,TCP\u8fde\u63a5\u662f\u5065\u5eb7\u7684<\/span><\/p>\n

          \n

          2.2.2.1.3.2\u53d7\u5e72\u6270<\/span><\/p>\n

          \u4f20\u8f93\u5c42\u5f80\u4e0b\u4f1a\u53d7\u5230<\/span><\/p>\n

            \n
          • \u81ea\u5df1\u4f20\u8f93\u5c42\u7684\u6574\u53f0\u673a\u5668CPU\u4e25\u91cd\u9971\u548c\u5185\u6838\u5361\u987f<\/span><\/li>\n
          • \u5f80\u4e0b\u5e95\u5c42\u7684\u7f51\u5361\u961f\u5217\u62e5\u585e\u3001\u7f51\u7edc\u62e5\u5835<\/span><\/li>\n
          • \u7684\u53ef\u80fd\u53d8\u4e3a\u957f\u671f\u5f02\u5e38\u5931\u6548\u7684\u4e34\u65f6\u72b6\u51b5\u6296\u52a8<\/span><\/li>\n<\/ul>\n

            \u56e0\u6b64\u8981\u68c0\u6d4b\u5230\u8d85\u65f6\u591a\u6b21 \u624d\u5c11\u8bef\u5224\u51fa \u975e\u4e34\u65f6\u72b6\u51b5,\u800c\u662f\u957f\u671f\u5931\u6548\u7684\u5f02\u5e38<\/span><\/p>\n

            \n

            2.2.2.1.3.3\u95f4\u9694\u957f<\/span><\/p>\n

            \u4fdd\u969c\u81f3\u5c11\u6709\u53d1\u7684,\u7ef4\u62a4\u63a2\u6d4b\u95f4\u9694\u65f6\u95f4\u592a\u957f：Keepalive>=2h<\/span><\/p>\n

            \n
            2.2.2.2\u5e94\u7528\u5c42\u5fc3\u8df3\u5305<\/span><\/h6>\n
            2.2.2.2.1\u4f18\u52bf<\/span><\/h6>\n

            2.2.2.2.1.1\u81ea\u5b9a\u4e49\u77ed\u95f4\u9694<\/span><\/p>\n

            \u5728\u6211\u65b9\u5e94\u7528\u5c42\u5236\u4f5c\u7684PING\/PONG\/GET health\u5fc3\u8df3\u5305，\u80fd\u6839\u636e\u5b9e\u9645\u5982\u679c\u9700\u8981\u66f4\u5feb\u7684\u5f02\u5e38\u68c0\u6d4b\u9891\u7387,\u5c31\u81ea\u5b9a\u4e49\u5730\u7f29\u77ed\u5e94\u7528\u5c42\u5fc3\u8df3\u63a2\u6d4b\u53d1\u9001\u7684\u95f4\u9694\u65f6\u95f4<\/span><\/p>\n

            \n

            2.2.2.2.1.2\u68c0\u6d4b\u5185\u5bb9\u66f4\u591a<\/span><\/p>\n

            \u80fd\u6d4b\u5b8c\u6574 \u6211\u65b9\u5e94\u7528\u5c42\u53d1<->\u5bf9\u65b9\u5e94\u7528\u5c42\u6536 \u4e0d\u4ec5\u4f20\u8f93\u5c42\u8fde\u63a5,\u8fd8\u5305\u62ec\u4e86\u5e94\u7528\u5c42\u7684\u670d\u52a1\u5065\u5eb7：<\/span><\/p>\n

              \n
            • \u8fdb\u7a0b\u8fd8\u5728<\/span><\/li>\n
            • \u5e94\u7528\u7ebf\u7a0b\u8fd8\u80fd\u5904\u7406\u8bf7\u6c42<\/span><\/li>\n
            • HTTP\u670d\u52a1\u6b63\u5e38<\/span><\/li>\n
            • \u6570\u636e\u5e93\u8fde\u63a5\u53ef\u80fd\u6b63\u5e38<\/span><\/li>\n
            • \u4f9d\u8d56\u670d\u52a1\u53ef\u80fd\u6b63\u5e38<\/span><\/li>\n<\/ul>\n

              \u66f4\u6df1\u5c42\u7ea7\u5730\u68c0\u6d4b\u5230\u6574\u4e2aJava\u670d\u52a1\u903b\u8f91\u7684\u5065\u5eb7<\/span><\/p>\n

              \n
              2.2.2.2.2\u52a3\u52bf<\/span><\/h6>\n

              2.2.2.2.2.1\u53d7\u5230\u7684\u5e72\u6270\u66f4\u591a<\/span><\/p>\n

              \u5e94\u7528\u5c42\u7684ping,\u5f80\u4e0b\u53d7\u5230\u4f20\u8f93\u5c42\u5230\u5e95\u5c42\u7684\u4e34\u65f6\u72b6\u51b5\u6296\u52a8\u5916,\u8fd8\u989d\u5916\u6709\u53d7\u5230\u81ea\u5df1\u5e94\u7528\u5c42\u7684\u4e34\u65f6\u72b6\u51b5\u6296\u52a8: \u7ebf\u7a0b\u8c03\u5ea6 \u4e8b\u4ef6\u5faa\u73af\u5361\u4f4f CPU\u8fc7\u8f7d \u9501\u7ade\u4e89 \u56e0\u6b64\u8981ping\u66f4\u591a\u6b21\u8d85\u65f6\u5931\u8d25，\u624d\u4f1a\u66f4\u5c11\u8bef\u5224\u51fa\u662f\u957f\u4e45\u6027\u4e0d\u4f1a\u81ea\u5df1\u6062\u590d\u7684\u5931\u6548\u5f02\u5e38,\u6807\u8bb0unhealthy<\/span><\/p>\n

              \n
              2.2.2.3\u5fc3\u8df3\u6296\u52a8jitter<\/span><\/h6>\n

              \u5fc3\u8df3\u5305\u5de5\u7a0b\u4e0a \u4f1a\u52a0\u4e00\u70b9\u968f\u673a\u6296\u52a8jitter,\u6253\u6563\u6240\u6709\u673a\u5668\u7684\u5fc3\u8df3\u65f6\u95f4,\u907f\u5f00\u5168\u90e8\u90fd\u540c\u4e00\u65f6\u523b\u5fc3\u8df3\u4ea7\u751f\u7684\u77ac\u95f4\u6d41\u91cf\u5c16\u5cf0<\/span><\/p>\n

              \n

              \u4e09\u3001\u8d1f\u8f7d\u5747\u8861\u5668<\/span><\/h2>\n

              \u8d1f\u8f7d\u5747\u8861\u5668\u5bf9\u540e\u7aef\u670d\u52a1\u5668\u8fdb\u884c：<\/span><\/p>\n

              1.\u5065\u5eb7\u68c0\u67e5<\/span><\/h3>\n
                \n
              • TCP\u8fde\u63a5\u68c0\u67e5<\/span><\/li>\n
              • HTTP GET \/health<\/span><\/li>\n
              • HTTPS\u68c0\u67e5<\/span><\/li>\n
              • gRPC health check<\/span><\/li>\n
              • \u81ea\u5b9a\u4e49ping\/pong<\/span><\/li>\n
              • \u88ab\u52a8\u89c2\u5bdf\u8bf7\u6c42\u9519\u8bef\u7387<\/span><\/li>\n<\/ul>\n

                1.1\u7ecf\u53d7\u5e72\u6270<\/span><\/h4>\n

                \u5065\u5eb7\u68c0\u67e5\u8981\u7ecf\u5f97\u4f4f \u968f\u673a\u4e34\u65f6\u7684\u72b6\u51b5\u6296\u52a8：<\/span><\/p>\n

                  \n
                • \u5076\u5c14\u4e00\u6b21\u7f51\u7edc\u6296\u52a8<\/span><\/li>\n
                • GC 5md<\/span><\/li>\n
                • \u8c03\u5ea6\u5ef6\u8fdf<\/span><\/li>\n<\/ul>\n
                  1.1.1\u5de5\u7a0b\u5e73\u8861<\/span><\/h5>\n

                  \u8981\u5bb9\u7eb3\u8010\u53d7\u5728,\u6301\u4e45\u65e0\u6cd5\u81ea\u6062\u590d\u7684\u5f02\u5e38,\u5224\u65ad\u4e4b\u5916，\u5de5\u7a0b\u4e0a\u5e73\u8861： \u68c0\u6d4b\u8d8a\u5feb \u2193 \u867d\u6545\u969c\u6062\u590d\u8d8a\u5feb， \u4f46\u8bef\u5224\u6982\u7387\u8d8a\u5927\u3001\u5f00\u9500\u8d8a\u5927 \u68c0\u6d4b\u8d8a\u6162 \u2193 \u867d\u8bef\u5224\u5c11\u3001\u5f00\u9500\u5c0f， \u4f46\u6545\u969c\u53d1\u73b0\u6162<\/span><\/p>\n

                  \n

                  2.\u9009\u51fa\u670d\u52a1<\/span><\/h3>\n

                  \u7528\u7b97\u6cd5：<\/span><\/p>\n

                    \n
                  • \u52a0\u6743\u8f6e\u8be2<\/li>\n
                  • Least Connection<\/span><\/li>\n
                  • Least Requests<\/span><\/li>\n
                  • \u5ef6\u8fdf\u4f18\u5148<\/span><\/li>\n
                  • \u4e00\u81f4\u6027\u54c8\u5e0c<\/span><\/li>\n
                  • \u8d44\u6e90\u8d1f\u8f7d<\/span><\/li>\n
                  • EWMA\u5ef6\u8fdf<\/span><\/li>\n<\/ul>\n

                    \u9009\u51fa\u4e00\u4e2a\u5065\u5eb7\u540e\u7aef\u670d\u52a1\u5668\u5904\u7406\u8bf7\u6c42<\/span><\/p>\n

                    \n

                    3.\u6728\u677f\u8d44\u6e90\u74f6\u9888<\/span><\/h3>\n

                    \u7cfb\u7edf\u541e\u5410\u91cf\u4f1a\u53d7\u6700\u5148\u8017\u5c3d\u7684\u74f6\u9888\u8d44\u6e90min(<\/span><\/p>\n

                  • CPU\u7684\u65f6\u95f4\u5360\u7528\u7387,<\/li>\n
                  • \u7f51\u7edc\u901f\u7387,<\/span><\/li>\n
                  • \u5185\u5b58\u5bb9\u91cf,<\/span><\/li>\n
                  • \u7ebf\u7a0b\u963b\u585e,<\/span><\/li>\n
                  • \u6570\u636e\u5e93\u6027\u80fd,<\/span><\/li>\n
                  • \u8fde\u63a5\u6c60\u5bb9\u91cf<\/span><\/li>\n

                    )\u9650\u5236<\/span><\/p>\n

                    \n

                    4.\u5b89\u5168\u91cd\u4f20\u8bf7\u6c42<\/span><\/h3>\n

                    \u8bf7\u6c42\u6ca1\u6709\u5f97\u5230ACK\u56de\u590d，\u5c31\u65e0\u6cd5\u76f4\u63a5\u5730\u786e\u5b9a\u51fa\u8bf7\u6c42\u662f\u5426\u5230\u8fbe，\u6b64\u65f6\u5982\u679c\u76f4\u63a5\u91cd\u4f20\u8bf7\u6c42\u5c31\u6709\u53ef\u80fd\u9020\u6210\u91cd\u590d\u9001\u8fbe，\u6709\u5b9e\u9645\u4e1a\u52a1\u7684\u771f\u5b9e\u7cfb\u7edf\u4f1a\u53d7\u5230：<\/span><\/p>\n

                      \n
                    • \u5e42\u7b49\u6027<\/li>\n
                    • request ID<\/span><\/li>\n
                    • \u53bb\u91cd<\/span><\/li>\n
                    • \u4e8b\u52a1\u8bbe\u8ba1<\/span><\/li>\n<\/ul>\n

                      \u6765\u8fdb\u884c\u5b89\u5168\u7684\u91cd\u4f20<\/span><\/p>\n

                      \n

                      \u56db\u3001URG\u4e0ePSH<\/span><\/h2>\n

                      1.URG=Urgent<\/span><\/h3>\n

                      \u4f20\u8f93\u5c42：\u6b63\u5e38TCP\u5b57\u8282\u6d41\u91cc\u6807\u51fa\u7d27\u6025\u4fe1\u606f\u6bb5\u7684\u59cb\u8fb9\u754c，\u7528Urgent Pointera\u6307\u51fa\u7d27\u6025\u59cb\u8fb9\u754c\u6b63\u504f\u79fb\u91cf\u540e\u7684\u672b\u8fb9\u754c<\/span> \u5e94\u7528\u5c42：\u4f20\u8f93\u5c42TCP\u4f1a\u901a\u77e5\u63a5\u6536\u7684\u5e94\u7528\u5c42,\u5f53\u524d\u6570\u636e\u6d41\u4e2d\u5b58\u5728\u7d27\u6025\u4fe1\u606f，\u5e94\u7528\u53ef\u4ee5\u7528socket API\u5bf9\u5b83\u91c7\u53d6\u7279\u6b8a\u5904\u7406<\/span><\/p>\n

                      \n

                      2.PSH=Push<\/span><\/h3>\n

                      \u4f20\u8f93\u5c42：\u7528\u4e8e\u53d1\u9001\u65b9\u63d0\u793a\u63a5\u6536TCP:\u8fd9\u4e9b\u5df2\u7ecf\u5230\u8fbe\u63a5\u6536\u7f13\u51b2\u533a\u7684\u6570\u636e,\u4e0d\u8981\u4e3a\u4e86\u51d1\u66f4\u591a\u5b57\u8282\u800c\u957f\u65f6\u95f4\u7f13\u51b2，\u5e94\u5c3d\u5feb\u628a\u5b83\u4eec\u4ea4\u4ed8\u7ed9\u5e94\u7528\u5c42<\/span>\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

                      \u6587\u7ae0\u76ee\u5f55
                      \n\u4e00\u3001\u8d44\u6e90\u4ece\u4e0a\u5f80\u4e0b\u5173\u95ed
                      \n1.\u5e94\u7528\u5c42Socket\u89c6\u89d2\u4e0b\u7684\u5173\u95ed
                      \n1.1Socket\u81ea\u5df1\u5173\u95ed\u65f6\u7528\u7684API
                      \n1.1.1Socket.flush
                      \n1.1.2Socket.close
                      \n1.2\u8fdb\u7a0b\u5d29\u6e83\u65f6Socket\u88ab\u52a8\u7684\u5173\u95ed
                      \n1.2.1\u65e0\u6289\u8feb\u5212\u5f53\u73b0\u53d1\u9001\u8fb9\u754c
                      \n1.2.2\u65e0\u5f15\u7528\u540e\u9047\u8d70\u91ca\u653e\u6d41\u7a0b
                      \n2.\u4f20\u8f93\u5c42TCP\u8fde\u63a5\u89c6\u89d2\u4e0b\u7684\u5173\u95ed
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