{"id":1904,"date":"2020-07-09T05:11:51","date_gmt":"2020-07-08T21:11:51","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1904"},"modified":"2022-03-27T00:56:16","modified_gmt":"2022-03-26T16:56:16","slug":"apache-kudu%e8%af%a6%e7%bb%86%e4%bb%8b%e7%bb%8d","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1904","title":{"rendered":"Apache Kudu\u8be6\u7ec6\u4ecb\u7ecd"},"content":{"rendered":"

\u524d\u8a00<\/span><\/h1>\n
Apache Kudu\u662f\u7531Cloudera\u5f00\u6e90\u7684\u5b58\u50a8\u5f15\u64ce\uff0c\u53ef\u4ee5\u540c\u65f6\u63d0\u4f9b\u4f4e\u5ef6\u8fdf\u7684\u968f\u673a\u8bfb\u5199\u548c\u9ad8\u6548\u7684\u6570\u636e\u5206\u6790\u80fd\u529b\u3002Kudu\u652f\u6301\u6c34\u5e73\u6269\u5c55\uff0c\u4f7f\u7528Raft\u534f\u8bae\u8fdb\u884c\u4e00\u81f4\u6027\u4fdd\u8bc1\uff0c\u5e76\u4e14\u4e0eCloudera Impala\u548cApache Spark\u7b49\u5f53\u524d\u6d41\u884c\u7684\u5927\u6570\u636e\u67e5\u8be2\u548c\u5206\u6790\u5de5\u5177\u7ed3\u5408\u7d27\u5bc6\u3002\u672c\u6587\u5c06\u4e3a\u60a8\u4ecb\u7ecdKudu\u7684\u4e00\u4e9b\u57fa\u672c\u6982\u5ff5\u548c\u67b6\u6784\u4ee5\u53ca\u5728\u4f01\u4e1a\u4e2d\u7684\u5e94\u7528\uff0c\u4f7f\u60a8\u5bf9Kudu\u6709\u4e00\u4e2a\u8f83\u4e3a\u5168\u9762\u7684\u4e86\u89e3\u3002<\/p>\n

\u4e00\u3001\u4e3a\u4ec0\u4e48\u9700\u8981Kudu<\/h2>\n

Kudu\u8fd9\u4e2a\u540d\u5b57\u542c\u8d77\u6765\u53ef\u80fd\u6709\u4e9b\u5947\u602a\uff0c\u5b9e\u9645\u4e0a\uff0cKudu\u662f\u4e00\u79cd\u975e\u6d32\u7684\u5927\u7f9a\u7f8a\uff0c\u4e2d\u6587\u540d\u53eb\u201c\u637b\u89d2\u7f9a\u201d\u3002\u6bd4\u8f83\u6709\u610f\u601d\u7684\u662f\uff0c\u540c\u4e3aCloudera\u516c\u53f8\u5f00\u6e90\u7684\u53e6\u4e00\u6b3e\u4ea7\u54c1Impala\uff0c\u662f\u53e6\u4e00\u79cd\u975e\u6d32\u7684\u7f9a\u7f8a\uff0c\u53eb\u505a\u201c\u9ed1\u6591\u7f9a\u201d\uff0c\u4e5f\u53eb\u201c\u9ad8\u89d2\u7f9a\u201d\u3002\u4e0d\u77e5\u9053Cloudera\u516c\u53f8\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u559c\u6b22\u7f9a\u7f8a\uff0c\u4e5f\u8bb8\u662f\u56e0\u4e3a\u7f9a\u7f8a\u7684\u901f\u5ea6\u5feb\u5427\u3002
\n\u8a00\u5f52\u6b63\u4f20\uff0c\u73b0\u5728\u63d0\u8d77\u5927\u6570\u636e\u5b58\u50a8\uff0c\u6211\u4eec\u80fd\u60f3\u5230\u7684\u6280\u672f\u6709\u5f88\u591a\uff0c\u6bd4\u5982HDFS\uff0c\u4ee5\u53ca\u5728HDFS\u4e0a\u7684\u5217\u5f0f\u5b58\u50a8\u6280\u672fApache Parquet\uff0cApache ORC\uff0c\u8fd8\u6709\u4ee5KV\u5f62\u5f0f\u5b58\u50a8\u534a\u7ed3\u6784\u5316\u6570\u636e\u7684Apache HBase\u548cApache Cassandra\u7b49\u7b49\u3002\u65e2\u7136\u6709\u4e86\u5982\u6b64\u591a\u7684\u5b58\u50a8\u6280\u672f\uff0cCloudera\u516c\u53f8\u4e3a\u4ec0\u4e48\u8981\u5f00\u53d1\u51fa\u4e00\u6b3e\u5168\u65b0\u7684\u5b58\u50a8\u5f15\u64ceKudu\u5462\uff1f
\n\u4e8b\u5b9e\u4e0a\uff0c\u5f53\u524d\u7684\u8fd9\u4e9b\u5b58\u50a8\u6280\u672f\u90fd\u5b58\u5728\u7740\u4e00\u5b9a\u7684\u5c40\u9650\u6027\u3002\u5bf9\u4e8e\u4f1a\u88ab\u7528\u6765\u8fdb\u884c\u5206\u6790\u7684\u9759\u6001\u6570\u636e\u96c6\u6765\u8bf4\uff0c\u4f7f\u7528Parquet\u6216\u8005ORC\u5b58\u50a8\u662f\u4e00\u79cd\u660e\u667a\u7684\u9009\u62e9\u3002\u4f46\u662f\u76ee\u524d\u7684\u5217\u5f0f\u5b58\u50a8\u6280\u672f\u90fd\u4e0d\u80fd\u66f4\u65b0\u6570\u636e\uff0c\u800c\u4e14\u968f\u673a\u8bfb\u5199\u6027\u80fd\u611f\u4eba\u3002\u800c\u53ef\u4ee5\u8fdb\u884c\u9ad8\u6548\u968f\u673a\u8bfb\u5199\u7684HBase\u3001Cassandra\u7b49\u6570\u636e\u5e93\uff0c\u5374\u5e76\u4e0d\u9002\u7528\u4e8e\u57fa\u4e8eSQL\u7684\u6570\u636e\u5206\u6790\u65b9\u5411\u3002\u6240\u4ee5\u73b0\u5728\u7684\u4f01\u4e1a\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u5b58\u50a8\u4e24\u5957\u6570\u636e\u5206\u522b\u7528\u4e8e\u5b9e\u65f6\u8bfb\u5199\u4e0e\u6570\u636e\u5206\u6790\uff0c\u5148\u5c06\u6570\u636e\u5199\u5165HBase\u4e2d\uff0c\u518d\u5b9a\u671f\u901a\u8fc7ETL\u5230Parquet\u8fdb\u884c\u6570\u636e\u540c\u6b65\u3002\u4f46\u662f\u8fd9\u6837\u505a\u6709\u5f88\u591a\u7f3a\u70b9\uff1a<\/p>\n

    \n
  1. \u7528\u6237\u9700\u8981\u5728\u4e24\u5957\u7cfb\u7edf\u95f4\u7f16\u5199\u548c\u7ef4\u62a4\u590d\u6742\u7684ETL\u903b\u8f91\u3002<\/li>\n
  2. \u65f6\u6548\u6027\u8f83\u5dee\u3002\u56e0\u4e3aETL\u901a\u5e38\u662f\u4e00\u4e2a\u5c0f\u65f6\u3001\u51e0\u4e2a\u5c0f\u65f6\u751a\u81f3\u662f\u4e00\u5929\u4e00\u6b21\uff0c\u90a3\u4e48\u53ef\u4f9b\u5206\u6790\u7684\u6570\u636e\u5c31\u9700\u8981\u4e00\u4e2a\u5c0f\u65f6\u81f3\u4e00\u5929\u7684\u65f6\u95f4\u540e\u624d\u8fdb\u5165\u5230\u53ef\u7528\u72b6\u6001\uff0c\u4e5f\u5c31\u662f\u8bf4\u4ece\u6570\u636e\u5230\u8fbe\u5230\u53ef\u88ab\u5206\u6790\u4e4b\u95f4\u662f\u4f1a\u5b58\u5728\u4e00\u4e2a\u8f83\u4e3a\u660e\u663e\u7684\u201c\u7a7a\u6863\u671f\u201d\u7684\u3002<\/li>\n
  3. \u66f4\u65b0\u9700\u6c42\u96be\u4ee5\u6ee1\u8db3\u3002\u5728\u5b9e\u9645\u60c5\u51b5\u4e2d\u53ef\u80fd\u4f1a\u6709\u4e00\u4e9b\u5bf9\u5df2\u7ecf\u5199\u5165\u7684\u6570\u636e\u7684\u66f4\u65b0\u9700\u6c42\uff0c\u8fd9\u79cd\u60c5\u51b5\u5f80\u5f80\u9700\u8981\u5bf9\u5386\u53f2\u6570\u636e\u8fdb\u884c\u66f4\u65b0\uff0c\u800c\u5bf9Parquet\u8fd9\u79cd\u9759\u6001\u6570\u636e\u96c6\u7684\u66f4\u65b0\u64cd\u4f5c\uff0c\u4ee3\u4ef7\u662f\u975e\u5e38\u6602\u8d35\u7684\u3002<\/li>\n
  4. \u5b58\u50a8\u8d44\u6e90\u6d6a\u8d39\u3002\u4e24\u5957\u5b58\u50a8\u7cfb\u7edf\u610f\u5473\u7740\u5360\u7528\u7684\u78c1\u76d8\u8d44\u6e90\u7ffb\u500d\u4e86\uff0c\u9020\u6210\u4e86\u6210\u672c\u7684\u63d0\u5347\u3002<\/li>\n<\/ol>\n

    \u6211\u4eec\u77e5\u9053\uff0c\u57fa\u4e8eHDFS\u7684\u5b58\u50a8\u6280\u672f\uff0c\u6bd4\u5982Parquet\uff0c\u5177\u6709\u9ad8\u541e\u5410\u91cf\u8fde\u7eed\u8bfb\u53d6\u6570\u636e\u7684\u80fd\u529b\uff1b\u800cHBase\u548cCassandra\u7b49\u6280\u672f\u9002\u7528\u4e8e\u4f4e\u5ef6\u8fdf\u7684\u968f\u673a\u8bfb\u5199\u573a\u666f\uff0c\u90a3\u4e48\u6709\u6ca1\u6709\u4e00\u79cd\u6280\u672f\u53ef\u4ee5\u540c\u65f6\u5177\u5907\u8fd9\u4e24\u79cd\u4f18\u70b9\u5462\uff1fKudu\u63d0\u4f9b\u4e86\u4e00\u79cd\u201chappy medium\u201d\u7684\u9009\u62e9\uff1a<\/p>\n

    \n
    \n
    <\/div>\n
    <\/div>\n<\/div>\n
    kudu\u7684\u5b9a\u4f4d<\/div>\n<\/div>\n

    Kudu\u4e0d\u4f46\u63d0\u4f9b\u4e86\u884c\u7ea7\u7684\u63d2\u5165\u3001\u66f4\u65b0\u3001\u5220\u9664API\uff0c\u540c\u65f6\u4e5f\u63d0\u4f9b\u4e86\u63a5\u8fd1Parquet\u6027\u80fd\u7684\u6279\u91cf\u626b\u63cf\u64cd\u4f5c\u3002\u4f7f\u7528\u540c\u4e00\u4efd\u5b58\u50a8\uff0c\u65e2\u53ef\u4ee5\u8fdb\u884c\u968f\u673a\u8bfb\u5199\uff0c\u4e5f\u53ef\u4ee5\u6ee1\u8db3\u6570\u636e\u5206\u6790\u7684\u8981\u6c42\u3002<\/p>\n

    \u4e8c\u3001Kudu\u603b\u89c8<\/h2>\n

    Tables\u548cSchemas<\/h3>\n

    \u4ece\u7528\u6237\u89d2\u5ea6\u6765\u770b\uff0cKudu\u662f\u4e00\u79cd\u5b58\u50a8\u7ed3\u6784\u5316\u6570\u636e\u8868\u7684\u5b58\u50a8\u7cfb\u7edf\u3002\u5728\u4e00\u4e2aKudu\u96c6\u7fa4\u4e2d\u53ef\u4ee5\u5b9a\u4e49\u4efb\u610f\u6570\u91cf\u7684table\uff0c\u6bcf\u4e2atable\u90fd\u9700\u8981\u9884\u5148\u5b9a\u4e49\u597dschema\u3002\u6bcf\u4e2atable\u7684\u5217\u6570\u662f\u786e\u5b9a\u7684\uff0c\u6bcf\u4e00\u5217\u90fd\u9700\u8981\u6709\u540d\u5b57\u548c\u7c7b\u578b\uff0c\u6bcf\u4e2a\u8868\u4e2d\u53ef\u4ee5\u628a\u5176\u4e2d\u4e00\u5217\u6216\u591a\u5217\u5b9a\u4e49\u4e3a\u4e3b\u952e\u3002\u8fd9\u4e48\u770b\u6765\uff0cKudu\u66f4\u50cf\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff0c\u800c\u4e0d\u662f\u50cfHBase\u3001Cassandra\u548cMongoDB\u8fd9\u4e9bNoSQL\u6570\u636e\u5e93\u3002\u4e0d\u8fc7Kudu\u76ee\u524d\u8fd8\u4e0d\u80fd\u50cf\u5173\u7cfb\u578b\u6570\u636e\u4e00\u6837\u652f\u6301\u4e8c\u7ea7\u7d22\u5f15\u3002
    \nKudu\u4f7f\u7528\u786e\u5b9a\u7684\u5217\u7c7b\u578b\uff0c\u800c\u4e0d\u662f\u7c7b\u4f3c\u4e8eNoSQL\u7684\u201ceverything is byte\u201d\u3002\u8fd9\u53ef\u4ee5\u5e26\u6765\u4e24\u70b9\u597d\u5904\uff1a<\/p>\n

      \n
    1. \u786e\u5b9a\u7684\u5217\u7c7b\u578b\u4f7fKudu\u53ef\u4ee5\u8fdb\u884c\u7c7b\u578b\u7279\u6709\u7684\u7f16\u7801\u3002<\/li>\n
    2. \u53ef\u4ee5\u63d0\u4f9b SQL-like \u5143\u6570\u636e\u7ed9\u5176\u4ed6\u4e0a\u5c42\u67e5\u8be2\u5de5\u5177\uff0c\u6bd4\u5982BI\u5de5\u5177\u3002<\/li>\n<\/ol>\n

      \u8bfb\u5199\u64cd\u4f5c<\/h3>\n

      \u7528\u6237\u53ef\u4ee5\u4f7f\u7528 Insert<\/em>\uff0cUpdate<\/em>\u548cDelete<\/em> API\u5bf9\u8868\u8fdb\u884c\u5199\u64cd\u4f5c\u3002\u4e0d\u8bba\u4f7f\u7528\u54ea\u79cdAPI\uff0c\u90fd\u5fc5\u987b\u6307\u5b9a\u4e3b\u952e\u3002\u4f46\u6279\u91cf\u7684\u5220\u9664\u548c\u66f4\u65b0\u64cd\u4f5c\u9700\u8981\u4f9d\u8d56\u66f4\u9ad8\u5c42\u6b21\u7684\u7ec4\u4ef6\uff08\u6bd4\u5982Impala\u3001Spark\uff09\u3002Kudu\u76ee\u524d\u8fd8\u4e0d\u652f\u6301\u591a\u884c\u4e8b\u52a1\u3002
      \n\u800c\u5728\u8bfb\u64cd\u4f5c\u65b9\u9762\uff0cKudu\u53ea\u63d0\u4f9b\u4e86Scan<\/em>\u64cd\u4f5c\u6765\u83b7\u53d6\u6570\u636e\u3002\u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u8fc7\u6ee4\u6761\u4ef6\u6765\u83b7\u53d6\u81ea\u5df1\u60f3\u8981\u8bfb\u53d6\u7684\u6570\u636e\uff0c\u4f46\u76ee\u524d\u53ea\u63d0\u4f9b\u4e86\u4e24\u79cd\u7c7b\u578b\u7684\u8fc7\u6ee4\u6761\u4ef6\uff1a\u4e3b\u952e\u8303\u56f4\u548c\u5217\u503c\u4e0e\u5e38\u6570\u7684\u6bd4\u8f83\u3002\u7531\u4e8eKudu\u5728\u786c\u76d8\u4e2d\u7684\u6570\u636e\u91c7\u7528\u5217\u5f0f\u5b58\u50a8\uff0c\u6240\u4ee5\u53ea\u626b\u63cf\u9700\u8981\u7684\u5217\u5c06\u6781\u5927\u5730\u63d0\u9ad8\u8bfb\u53d6\u6027\u80fd\u3002<\/p>\n

      \u4e00\u81f4\u6027\u6a21\u578b<\/h3>\n

      Kudu\u4e3a\u7528\u6237\u63d0\u4f9b\u4e86\u4e24\u79cd\u4e00\u81f4\u6027\u6a21\u578b\u3002\u9ed8\u8ba4\u7684\u4e00\u81f4\u6027\u6a21\u578b\u662fsnapshot consistency<\/em>\u3002\u8fd9\u79cd\u4e00\u81f4\u6027\u6a21\u578b\u4fdd\u8bc1\u7528\u6237\u6bcf\u6b21\u8bfb\u53d6\u51fa\u6765\u7684\u90fd\u662f\u4e00\u4e2a\u53ef\u7528\u7684\u5feb\u7167\uff0c\u4f46\u8fd9\u79cd\u4e00\u81f4\u6027\u6a21\u578b\u53ea\u80fd\u4fdd\u8bc1\u5355\u4e2aclient\u53ef\u4ee5\u770b\u5230\u6700\u65b0\u7684\u6570\u636e\uff0c\u4f46\u4e0d\u80fd\u4fdd\u8bc1\u591a\u4e2aclient\u6bcf\u6b21\u53d6\u51fa\u7684\u90fd\u662f\u6700\u65b0\u7684\u6570\u636e\u3002\u53e6\u4e00\u79cd\u4e00\u81f4\u6027\u6a21\u578bexternal consistency<\/em>\u53ef\u4ee5\u5728\u591a\u4e2aclient\u4e4b\u95f4\u4fdd\u8bc1\u6bcf\u6b21\u53d6\u5230\u7684\u90fd\u662f\u6700\u65b0\u6570\u636e\uff0c\u4f46\u662fKudu\u6ca1\u6709\u63d0\u4f9b\u9ed8\u8ba4\u7684\u5b9e\u73b0\uff0c\u9700\u8981\u7528\u6237\u505a\u4e00\u4e9b\u989d\u5916\u5de5\u4f5c\u3002
      \n\u4e3a\u4e86\u5b9e\u73b0external consistency<\/em>\uff0cKudu\u63d0\u4f9b\u4e86\u4e24\u79cd\u65b9\u5f0f\uff1a<\/p>\n

        \n
      1. \u5728client\u4e4b\u95f4\u4f20\u64adtimestamp token\u3002\u5728\u4e00\u4e2aclient\u5b8c\u6210\u4e00\u6b21\u5199\u5165\u540e\uff0c\u4f1a\u5f97\u5230\u4e00\u4e2atimestamp token\uff0c\u7136\u540e\u8fd9\u4e2aclient\u628a\u8fd9\u4e2atoken\u4f20\u64ad\u5230\u5176\u4ed6client\uff0c\u8fd9\u6837\u5176\u4ed6client\u5c31\u53ef\u4ee5\u901a\u8fc7token\u53d6\u5230\u6700\u65b0\u6570\u636e\u4e86\u3002\u4e0d\u8fc7\u8fd9\u4e2a\u65b9\u5f0f\u7684\u590d\u6742\u5ea6\u5f88\u9ad8\u3002<\/li>\n
      2. \u901a\u8fc7commit-wait<\/em>\u65b9\u5f0f\uff0c\u8fd9\u6709\u4e9b\u7c7b\u4f3c\u4e8eGoogle\u7684Spanner\u3002\u4f46\u662f\u76ee\u524d\u57fa\u4e8eNTP\u7684commit-wait<\/em>\u65b9\u5f0f\u5ef6\u8fdf\u5b9e\u5728\u6709\u70b9\u9ad8\u3002\u4e0d\u8fc7Kudu\u76f8\u4fe1\uff0c\u968f\u7740Spanner\u7684\u51fa\u73b0\uff0c\u672a\u6765\u51e0\u5e74\u5185\u57fa\u4e8ereal-time clock\u7684\u6280\u672f\u5c06\u4f1a\u9010\u6e10\u6210\u719f\u3002<\/li>\n<\/ol>\n

        \u4e09\u3001Kudu\u7684\u67b6\u6784<\/h2>\n

        \u4e0eHDFS\u548cHBase\u76f8\u4f3c\uff0cKudu\u4f7f\u7528\u5355\u4e2a\u7684Master\u8282\u70b9\uff0c\u7528\u6765\u7ba1\u7406\u96c6\u7fa4\u7684\u5143\u6570\u636e\uff0c\u5e76\u4e14\u4f7f\u7528\u4efb\u610f\u6570\u91cf\u7684Tablet Server\u8282\u70b9\u7528\u6765\u5b58\u50a8\u5b9e\u9645\u6570\u636e\u3002\u53ef\u4ee5\u90e8\u7f72\u591a\u4e2aMaster\u8282\u70b9\u6765\u63d0\u9ad8\u5bb9\u9519\u6027\u3002<\/p>\n

        \n
        \n
        <\/div>\n
        <\/div>\n<\/div>\n
        Kudu\u67b6\u6784\u56fe\uff0c\u56fe\u7247\u6765\u6e90\u4e8e\u5b98\u7f51<\/div>\n<\/div>\n

        Master<\/h3>\n

        Kudu\u7684master\u8282\u70b9\u8d1f\u8d23\u6574\u4e2a\u96c6\u7fa4\u7684\u5143\u6570\u636e\u7ba1\u7406\u548c\u670d\u52a1\u534f\u8c03\u3002\u5b83\u627f\u62c5\u7740\u4ee5\u4e0b\u529f\u80fd\uff1a<\/p>\n

          \n
        1. \u4f5c\u4e3acatalog manager<\/em>\uff0cmaster\u8282\u70b9\u7ba1\u7406\u7740\u96c6\u7fa4\u4e2d\u6240\u6709table\u548ctablet\u7684schema\u53ca\u4e00\u4e9b\u5176\u4ed6\u7684\u5143\u6570\u636e\u3002<\/li>\n
        2. \u4f5c\u4e3acluster coordinator<\/em>\uff0cmaster\u8282\u70b9\u8ffd\u8e2a\u7740\u6240\u6709server\u8282\u70b9\u662f\u5426\u5b58\u6d3b\uff0c\u5e76\u4e14\u5f53server\u8282\u70b9\u6302\u6389\u540e\u534f\u8c03\u6570\u636e\u7684\u91cd\u65b0\u5206\u5e03\u3002<\/li>\n
        3. \u4f5c\u4e3atablet directory<\/em>\uff0cmaster\u8ddf\u8e2a\u6bcf\u4e2atablet\u7684\u4f4d\u7f6e\u3002<\/li>\n<\/ol>\n

          Catalog Manager<\/h4>\n

          Kudu\u7684master\u8282\u70b9\u4f1a\u6301\u6709\u4e00\u4e2a\u5355tablet\u7684table\u2014\u2014catalog table\uff0c\u4f46\u662f\u7528\u6237\u662f\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u7684\u3002master\u5c06\u5185\u90e8\u7684catalog\u4fe1\u606f\u5199\u5165\u8be5tablet\uff0c\u5e76\u4e14\u5c06\u6574\u4e2acatalog\u7684\u4fe1\u606f\u7f13\u5b58\u5230\u5185\u5b58\u4e2d\u3002\u968f\u7740\u73b0\u5728\u5546\u7528\u670d\u52a1\u5668\u4e0a\u7684\u5185\u5b58\u8d8a\u6765\u8d8a\u5927\uff0c\u5e76\u4e14\u5143\u6570\u636e\u4fe1\u606f\u5360\u7528\u7684\u7a7a\u95f4\u5176\u5b9e\u5e76\u4e0d\u5927\uff0c\u6240\u4ee5master\u4e0d\u5bb9\u6613\u5b58\u5728\u6027\u80fd\u74f6\u9888\u3002catalog table\u4fdd\u5b58\u4e86\u6240\u6709table\u7684schema\u7684\u7248\u672c\u4ee5\u53catable\u7684\u72b6\u6001\uff08\u521b\u5efa\u3001\u8fd0\u884c\u3001\u5220\u9664\u7b49\uff09\u3002<\/p>\n

          Cluster Coordination<\/h4>\n

          Kudu\u96c6\u7fa4\u4e2d\u7684\u6bcf\u4e2atablet server\u90fd\u9700\u8981\u914d\u7f6emaster\u7684\u4e3b\u673a\u540d\u5217\u8868\u3002\u5f53\u96c6\u7fa4\u542f\u52a8\u65f6\uff0ctablet server\u4f1a\u5411master\u6ce8\u518c\uff0c\u5e76\u53d1\u9001\u6240\u6709tablet\u7684\u4fe1\u606f\u3002tablet server\u7b2c\u4e00\u6b21\u5411master\u53d1\u9001\u4fe1\u606f\u65f6\u4f1a\u53d1\u9001\u6240\u6709tablet\u7684\u5168\u91cf\u4fe1\u606f\uff0c\u540e\u7eed\u6bcf\u6b21\u53d1\u9001\u5219\u53ea\u4f1a\u53d1\u9001\u589e\u91cf\u4fe1\u606f\uff0c\u4ec5\u5305\u542b\u65b0\u521b\u5efa\u3001\u5220\u9664\u6216\u4fee\u6539\u7684tablet\u7684\u4fe1\u606f\u3002
          \n\u4f5c\u4e3acluster coordination\uff0cmaster\u53ea\u662f\u96c6\u7fa4\u72b6\u6001\u7684\u89c2\u5bdf\u8005\u3002\u5bf9\u4e8etablet server\u4e2dtablet\u7684\u526f\u672c\u4f4d\u7f6e\u3001Raft\u914d\u7f6e\u548cschema\u7248\u672c\u7b49\u4fe1\u606f\u7684\u63a7\u5236\u548c\u4fee\u6539\u7531tablet server\u81ea\u8eab\u5b8c\u6210\u3002master\u53ea\u9700\u8981\u4e0b\u53d1\u547d\u4ee4\uff0ctablet server\u6267\u884c\u6210\u529f\u540e\u4f1a\u81ea\u52a8\u4e0a\u62a5\u5904\u7406\u7684\u7ed3\u679c\u3002<\/p>\n

          Tablet Directory<\/h4>\n

          \u56e0\u4e3amaster\u4e0a\u7f13\u5b58\u4e86\u96c6\u7fa4\u7684\u5143\u6570\u636e\uff0c\u6240\u4ee5client\u8bfb\u5199\u6570\u636e\u7684\u65f6\u5019\uff0c\u80af\u5b9a\u662f\u8981\u901a\u8fc7master\u624d\u80fd\u83b7\u53d6\u5230tablet\u7684\u4f4d\u7f6e\u7b49\u4fe1\u606f\u3002\u4f46\u662f\u5982\u679c\u6bcf\u6b21\u8bfb\u5199\u90fd\u8981\u901a\u8fc7master\u8282\u70b9\u7684\u8bdd\uff0c\u90a3master\u5c31\u4f1a\u53d8\u6210\u8fd9\u4e2a\u96c6\u7fa4\u7684\u6027\u80fd\u74f6\u9888\uff0c\u6240\u4ee5client\u4f1a\u5728\u672c\u5730\u7f13\u5b58\u4e00\u4efd\u5b83\u9700\u8981\u8bbf\u95ee\u7684tablet\u7684\u4f4d\u7f6e\u4fe1\u606f\uff0c\u8fd9\u6837\u5c31\u4e0d\u7528\u6bcf\u6b21\u8bfb\u5199\u90fd\u4ecemaster\u4e2d\u83b7\u53d6\u3002
          \n\u56e0\u4e3atablet\u7684\u4f4d\u7f6e\u53ef\u80fd\u4e5f\u4f1a\u53d1\u751f\u53d8\u5316\uff08\u6bd4\u5982\u67d0\u4e2atablet server\u8282\u70b9crash\u6389\u4e86\uff09\uff0c\u6240\u4ee5\u5f53tablet\u7684\u4f4d\u7f6e\u53d1\u751f\u53d8\u5316\u7684\u65f6\u5019\uff0cclient\u4f1a\u6536\u5230\u76f8\u5e94\u7684\u901a\u77e5\uff0c\u7136\u540e\u518d\u53bbmaster\u4e0a\u83b7\u53d6\u4e00\u4efd\u65b0\u7684\u5143\u6570\u636e\u4fe1\u606f\u3002<\/p>\n

          Tablet\u5b58\u50a8<\/h3>\n

          \u5728\u6570\u636e\u5b58\u50a8\u65b9\u9762\uff0cKudu\u9009\u62e9\u5b8c\u5168\u7531\u81ea\u5df1\u5b9e\u73b0\uff0c\u800c\u6ca1\u6709\u501f\u52a9\u4e8e\u5df2\u6709\u7684\u5f00\u6e90\u65b9\u6848\u3002tablet\u5b58\u50a8\u4e3b\u8981\u60f3\u8981\u5b9e\u73b0\u7684\u76ee\u6807\u4e3a\uff1a<\/p>\n

            \n
          1. \u5feb\u901f\u7684\u5217\u626b\u63cf\u3002<\/li>\n
          2. \u4f4e\u5ef6\u8fdf\u7684\u968f\u673a\u8bfb\u5199\u3002<\/li>\n
          3. \u4e00\u81f4\u6027\u7684\u6027\u80fd\u3002<\/li>\n<\/ol>\n

            RowSets<\/h4>\n

            \u5728Kudu\u4e2d\uff0ctablet\u88ab\u7ec6\u5206\u4e3a\u66f4\u5c0f\u7684\u5355\u5143\uff0c\u53eb\u505aRowSets<\/em>\u3002\u4e00\u4e9bRowSet\u4ec5\u5b58\u5728\u4e8e\u5185\u5b58\u4e2d\uff0c\u88ab\u79f0\u4e3aMemRowSets<\/em>\uff0c\u800c\u53e6\u4e00\u4e9b\u5219\u540c\u65f6\u4f7f\u7528\u5185\u5b58\u548c\u786c\u76d8\uff0c\u88ab\u79f0\u4e3aDiskRowSets<\/em>\u3002\u4efb\u4f55\u4e00\u884c\u672a\u88ab\u5220\u9664\u7684\u6570\u636e\u90fd\u53ea\u80fd\u5b58\u5728\u4e8e\u4e00\u4e2aRowSet\u4e2d\u3002
            \n\u65e0\u8bba\u4efb\u4f55\u65f6\u5019\uff0c\u4e00\u4e2atablet\u4ec5\u6709\u4e00\u4e2aMemRowSet\u7528\u6765\u4fdd\u5b58\u6700\u65b0\u63d2\u5165\u7684\u6570\u636e\uff0c\u5e76\u4e14\u6709\u4e00\u4e2a\u540e\u53f0\u7ebf\u7a0b\u4f1a\u5b9a\u671f\u628a\u5185\u5b58\u4e2d\u7684\u6570\u636eflush\u5230\u786c\u76d8\u4e0a\u3002
            \n\u5f53\u4e00\u4e2aMemRowSet\u88abflush\u5230\u786c\u76d8\u4e0a\u4ee5\u540e\uff0c\u4e00\u4e2a\u65b0\u7684MemRowSet\u4f1a\u66ff\u4ee3\u5b83\u3002\u800c\u539f\u6709\u7684MemRowSet\u4f1a\u53d8\u6210\u4e00\u5230\u591a\u4e2aDiskRowSet\u3002flush\u64cd\u4f5c\u662f\u5b8c\u5168\u540c\u6b65\u8fdb\u884c\u7684\uff0c\u5728\u8fdb\u884cflush\u65f6\uff0cclient\u540c\u6837\u53ef\u4ee5\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u3002<\/p>\n

            MemRowSet<\/h4>\n

            MemRowSets\u662f\u4e00\u4e2a\u53ef\u4ee5\u88ab\u5e76\u53d1\u8bbf\u95ee\u5e76\u8fdb\u884c\u8fc7\u9501\u4f18\u5316\u7684B-tree\uff0c\u4e3b\u8981\u662f\u57fa\u4e8eMassTree\u6765\u8bbe\u8ba1\u7684\uff0c\u4f46\u5b58\u5728\u51e0\u70b9\u4e0d\u540c\uff1a<\/p>\n

              \n
            1. Kudu\u5e76\u4e0d\u652f\u6301\u76f4\u63a5\u5220\u9664\u64cd\u4f5c\uff0c\u7531\u4e8e\u4f7f\u7528\u4e86MVCC\uff0c\u6240\u4ee5\u5728Kudu\u4e2d\u5220\u9664\u64cd\u4f5c\u5176\u5b9e\u662f\u63d2\u5165\u4e00\u6761\u6807\u5fd7\u7740\u5220\u9664\u7684\u6570\u636e\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u63a8\u8fdf\u5220\u9664\u64cd\u4f5c\u3002<\/li>\n
            2. \u7c7b\u4f3c\u5220\u9664\u64cd\u4f5c\uff0cKudu\u4e5f\u4e0d\u652f\u6301\u539f\u5730\u66f4\u65b0\u64cd\u4f5c\u3002<\/li>\n
            3. \u5c06tree\u7684leaf\u94fe\u63a5\u8d77\u6765\uff0c\u5c31\u50cfB+-tree\u3002\u8fd9\u4e00\u6b65\u5173\u952e\u7684\u64cd\u4f5c\u53ef\u4ee5\u660e\u663e\u5730\u63d0\u5347scan\u64cd\u4f5c\u7684\u6027\u80fd\u3002<\/li>\n
            4. \u6ca1\u6709\u5b9e\u73b0\u5b57\u5178\u6811\uff08trie\u6811\uff09\uff0c\u800c\u662f\u53ea\u7528\u4e86\u5355\u4e2atree\uff0c\u56e0\u4e3aKudu\u5e76\u4e0d\u9002\u7528\u4e8e\u6781\u9ad8\u7684\u968f\u673a\u8bfb\u5199\u7684\u573a\u666f\u3002<\/li>\n<\/ol>\n

              \u4e0eKudu\u4e2d\u5176\u4ed6\u6a21\u5757\u4e2d\u7684\u6570\u636e\u7ed3\u6784\u4e0d\u540c\uff0cMemRowSet\u4e2d\u7684\u6570\u636e\u4f7f\u7528\u884c\u5f0f\u5b58\u50a8\u3002\u56e0\u4e3a\u6570\u636e\u90fd\u5728\u5185\u5b58\u4e2d\uff0c\u6240\u4ee5\u6027\u80fd\u4e5f\u662f\u53ef\u4ee5\u63a5\u53d7\u7684\uff0c\u800c\u4e14Kudu\u5bf9\u5728MemRowSet\u4e2d\u7684\u6570\u636e\u7ed3\u6784\u8fdb\u884c\u4e86\u4e00\u5b9a\u7684\u4f18\u5316\u3002<\/p>\n

              DiskRowSet<\/h4>\n

              \u5f53MemRowSet\u88abflush\u5230\u786c\u76d8\u4e0a\uff0c\u5c31\u53d8\u6210\u4e86DiskRowSet\u3002\u5f53MemRowSet\u88abflush\u5230\u786c\u76d8\u7684\u65f6\u5019\uff0c\u6bcf32M\u5c31\u4f1a\u5f62\u6210\u4e00\u4e2a\u65b0\u7684DiskRowSet\uff0c\u8fd9\u4e3b\u8981\u662f\u4e3a\u4e86\u4fdd\u8bc1\u6bcf\u4e2aDiskRowSet\u4e0d\u4f1a\u592a\u5927\uff0c\u4fbf\u4e8e\u540e\u7eed\u7684\u589e\u91cfcompaction\u64cd\u4f5c\u3002Kudu\u901a\u8fc7\u5c06\u6570\u636e\u5206\u4e3abase data\u548cdelta data\uff0c\u6765\u5b9e\u73b0\u6570\u636e\u7684\u66f4\u65b0\u64cd\u4f5c\u3002Kudu\u4f1a\u5c06\u6570\u636e\u6309\u5217\u5b58\u50a8\uff0c\u6570\u636e\u88ab\u5207\u5206\u6210\u591a\u4e2apage\uff0c\u5e76\u4f7f\u7528B-tree\u8fdb\u884c\u7d22\u5f15\u3002\u9664\u4e86\u7528\u6237\u5199\u5165\u7684\u6570\u636e\uff0cKudu\u8fd8\u4f1a\u5c06\u4e3b\u952e\u7d22\u5f15\u5b58\u5165\u4e00\u4e2a\u5217\u4e2d\uff0c\u5e76\u4e14\u63d0\u4f9b\u5e03\u9686\u8fc7\u6ee4\u5668\u6765\u8fdb\u884c\u9ad8\u6548\u67e5\u627e\u3002<\/p>\n

              Compaction<\/h4>\n

              \u4e3a\u4e86\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\uff0cKudu\u4f1a\u5b9a\u671f\u8fdb\u884ccompaction\u64cd\u4f5c\uff0c\u5408\u5e76delta data\u4e0ebase data\uff0c\u5bf9\u6807\u8bb0\u4e86\u5220\u9664\u7684\u6570\u636e\u8fdb\u884c\u5220\u9664\uff0c\u5e76\u4e14\u4f1a\u5408\u5e76\u4e00\u4e9bDiskRowSet\u3002<\/p>\n

              \u5206\u533a<\/h3>\n

              \u548c\u8bb8\u591a\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf\u4e00\u6837\uff0cKudu\u7684table\u662f\u6c34\u5e73\u5206\u533a\u7684\u3002BigTable\u53ea\u63d0\u4f9b\u4e86range\u5206\u533a\uff0cCassandra\u53ea\u63d0\u4f9bhash\u5206\u533a\uff0c\u800cKudu\u63d0\u4f9b\u4e86\u8f83\u4e3a\u7075\u6d3b\u7684\u5206\u533a\u65b9\u5f0f\u3002\u5f53\u7528\u6237\u521b\u5efa\u4e00\u4e2atable\u65f6\uff0c\u53ef\u4ee5\u540c\u65f6\u6307\u5b9atable\u7684\u7684partition schema\uff0cpartition schema\u4f1a\u5c06primary key\u6620\u5c04\u4e3apartition key\u3002\u4e00\u4e2apartition schema\u5305\u62ec0\u5230\u591a\u4e2ahash-partitioning\u89c4\u5219\u548c\u4e00\u4e2arange-partitioning\u89c4\u5219\u3002\u901a\u8fc7\u7075\u6d3b\u5730\u7ec4\u5408\u5404\u79cdpartition\u89c4\u5219\uff0c\u7528\u6237\u53ef\u4ee5\u521b\u9020\u9002\u7528\u4e8e\u81ea\u5df1\u4e1a\u52a1\u573a\u666f\u7684\u5206\u533a\u65b9\u5f0f\u3002<\/p>\n

              \u56db\u3001Kudu\u7684\u5e94\u7528<\/h2>\n

              Kudu\u7684\u5e94\u7528\u573a\u666f\u5f88\u5e7f\u6cdb\uff0c\u6bd4\u5982\u53ef\u4ee5\u8fdb\u884c\u5b9e\u65f6\u7684\u6570\u636e\u5206\u6790\uff0c\u7528\u4e8e\u6570\u636e\u53ef\u80fd\u4f1a\u5b58\u5728\u53d8\u5316\u7684\u65f6\u5e8f\u6570\u636e\u5e94\u7528\u7b49\uff0c\u751a\u81f3\u8fd8\u6709\u4eba\u63a2\u8ba8\u8fc7\u4f7f\u7528Kudu\u66ff\u4ee3Kafka\u7684\u53ef\u884c\u6027\uff08\u8be6\u60c5\u8bf7\u6233\u8fd9\u91cc<\/a>\uff09\u3002\u4e0d\u8fc7Kudu\u6700\u6709\u540d\u548c\u6700\u6210\u529f\u7684\u5e94\u7528\u6848\u4f8b\uff0c\u8fd8\u662f\u56fd\u5185\u7684\u5c0f\u7c73\u3002\u5c0f\u7c73\u516c\u53f8\u4e0d\u4ec5\u4f7f\u7528Kudu\uff0c\u8fd8\u6df1\u5ea6\u53c2\u4e0e\u4e86Kudu\u7684\u5f00\u53d1\u3002Kudu\u9879\u76ee\u57282012\u5e7410\u6708\u7531Cloudera\u516c\u53f8\u53d1\u8d77\uff0c2015\u5e7410\u6708\u5bf9\u5916\u516c\u5e03\uff0c2015\u5e7412\u6708\u8fdb\u5165Apache\u5b75\u5316\u5668\uff0c\u4f46\u662f\u5c0f\u7c73\u516c\u53f8\u65e9\u57282014\u5e749\u6708\u5c31\u52a0\u5165\u5230Kudu\u7684\u5f00\u53d1\u4e2d\u4e86\u3002
              \n\u4e0b\u9762\u6211\u4eec\u53ef\u4ee5\u8ddf\u968fCloudera\u5728\u5ba3\u4f20Kudu\u65f6\u4f7f\u7528\u7684ppt\u6765\u770b\u4e00\u770bKudu\u5728\u5c0f\u7c73\u7684\u4f7f\u7528\u3002<\/p>\n

              \n
              \n
              <\/div>\n
              <\/div>\n<\/div>\n
              \u5c0f\u7c73 use case<\/div>\n<\/div>\n

              \u4ece\u4e0a\u56fe\u4e2d\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0cKudu\u5728\u5c0f\u7c73\u4e3b\u8981\u7528\u6765\u5bf9\u624b\u673aapp\u548c\u540e\u7aef\u670d\u52a1\u7684RPC\u8c03\u7528\u4e8b\u4ef6\u8fdb\u884c\u8ffd\u8e2a\uff0c\u4ee5\u53ca\u5bf9\u670d\u52a1\u8fdb\u884c\u76d1\u63a7\u3002\u5728\u5c0f\u7c73\u7684\u4f7f\u7528\u573a\u666f\u4e0b\uff0cKudu\u96c6\u7fa4\u5df2\u7ecf\u8fbe\u5230\u6bcf\u5929200\u4ebf\u6b21\u5199\u5165\uff0c\u5e76\u4e14\u8fd8\u5728\u589e\u957f\u3002
              \nKudu\u9664\u4e86\u4f18\u79c0\u7684\u6027\u80fd\uff0c\u66f4\u4e3a\u91cd\u8981\u7684\u662f\u53ef\u4ee5\u7b80\u5316\u6570\u636e\u5904\u7406\u7684\u6d41\u7a0b\u3002\u5728\u4f7f\u7528Kudu\u4ee5\u524d\uff0c\u5c0f\u7c73\u7684\u6570\u636e\u5904\u7406\u6d41\u7a0b\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n

              \n
              \n
              <\/div>\n
              <\/div>\n<\/div>\n
              before Kudu<\/div>\n<\/div>\n

              \u53ef\u4ee5\u770b\u5230\uff0c\u6570\u636e\u5904\u7406\u7684\u6d41\u7a0b\u5f88\u957f\u3002\u8fd9\u79cd\u5904\u7406\u6a21\u5f0f\u4e0d\u4f46\u8f83\u4e3a\u590d\u6742\uff0c\u800c\u4e14latency\u8f83\u9ad8\uff0c\u901a\u5e38\u9700\u8981\u7b49\u5f85\u8f83\u957f\u7684\u65f6\u95f4\uff081 hour – 1day\uff09\u624d\u80fd\u5f97\u5230\u5206\u6790\u7ed3\u679c\u3002\u4e0b\u9762\u518d\u6765\u770b\u770b\u4f7f\u7528Kudu\u4ee5\u540e\u7684\u6570\u636e\u5904\u7406\u6d41\u7a0b\u662f\u600e\u6837\u7684\uff1a<\/p>\n

              \n
              \n
              <\/div>\n
              <\/div>\n<\/div>\n
              after Kudu<\/div>\n<\/div>\n

              \u4f7f\u7528Kudu\u4ee5\u540e\uff0c\u6570\u636e\u5904\u7406\u7684\u94fe\u8def\u88ab\u7b80\u5316\u4e86\uff0c\u800c\u4e14\u5f97\u76ca\u4e8eKudu\u5bf9\u968f\u673a\u8bfb\u5199\u548c\u6570\u636e\u5206\u6790\u64cd\u4f5c\u7684\u652f\u6301\u90fd\u5f88\u597d\uff0c\u53ef\u4ee5\u76f4\u63a5\u5bf9Kudu\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u4ea4\u4e92\u5f0f\u5206\u6790\uff0c\u964d\u4f4e\u4e86\u7cfb\u7edf\u590d\u6742\u5ea6\uff0c\u5e76\u4e14latency\u88ab\u5927\u5927\u7f29\u77ed\uff080 ~ 10s\uff09\u3002
              \n<\/article>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":4,"featured_media":5717,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[140],"tags":[],"uagb_featured_image_src":{"full":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd.jpg",600,400,false],"thumbnail":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd-150x150.jpg",150,150,true],"medium":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd-300x200.jpg",300,200,true],"medium_large":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd.jpg",600,400,false],"large":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd.jpg",600,400,false],"1536x1536":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd.jpg",600,400,false],"2048x2048":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd.jpg",600,400,false],"mailpoet_newsletter_max":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd.jpg",600,400,false],"woocommerce_thumbnail":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd-50x50.jpg",50,50,true],"woocommerce_single":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd-80x53.jpg",80,53,true],"woocommerce_gallery_thumbnail":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd-100x100.jpg",100,100,true],"shop_catalog":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd-50x50.jpg",50,50,true],"shop_single":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd-80x53.jpg",80,53,true],"shop_thumbnail":["http:\/\/www.weijing.co\/wp-content\/uploads\/2020\/07\/Apache-Kudu\u8be6\u7ec6\u4ecb\u7ecd-100x100.jpg",100,100,true]},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":null,"_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1904"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1904"}],"version-history":[{"count":2,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1904\/revisions"}],"predecessor-version":[{"id":5718,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1904\/revisions\/5718"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/media\/5717"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1904"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1904"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}