{"id":50560,"date":"2024-01-13T13:02:57","date_gmt":"2024-01-28T17:03:35","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8e%e3%80%8asoftware-design-%e3%82%bd%e3%83%95%e3%83%88%e3%82%a6%e3%82%a7%e3%82%a2%e3%83%87%e3%82%b6%e3%82%a4%e3%83%b3-2022%e5%b9%b406%e6%9c%88%e5%8f%b7%e3%80%8b%e4%b8%ad%e5%85%b3\/"},"modified":"2024-05-04T18:14:04","modified_gmt":"2024-05-04T10:14:04","slug":"%e5%85%b3%e4%ba%8e%e3%80%8asoftware-design-%e3%82%bd%e3%83%95%e3%83%88%e3%82%a6%e3%82%a7%e3%82%a2%e3%83%87%e3%82%b6%e3%82%a4%e3%83%b3-2022%e5%b9%b406%e6%9c%88%e5%8f%b7%e3%80%8b%e4%b8%ad%e5%85%b3","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8e%e3%80%8asoftware-design-%e3%82%bd%e3%83%95%e3%83%88%e3%82%a6%e3%82%a7%e3%82%a2%e3%83%87%e3%82%b6%e3%82%a4%e3%83%b3-2022%e5%b9%b406%e6%9c%88%e5%8f%b7%e3%80%8b%e4%b8%ad%e5%85%b3\/","title":{"rendered":"\u5173\u4e8e\u300aSoftware Design (\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30c7\u30b6\u30a4\u30f3) 2022\u5e7406\u6708\u53f7\u300b\u4e2d\u5173\u4e8e\u201c\u9009\u62e9\u4e0d\u540e\u6094\u7684AWS\u6570\u636e\u5e93\uff1a\u8be6\u7ec6\u89e3\u91caRDS\u548cDynamoDB\u7684\u9009\u62e9\u8981\u70b9\u201d\uff08\u8865\u5145\u524d\u4e00\u7bc7\u6587\u7ae0\uff09\u7684\u90a3\u7bc7\u6587\u7ae0"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u8bf7\u6ce8\u610f\uff0c\u8fd9\u662f\u5173\u4e8e\u524d\u6587\u4e2d\u201cACID\u7279\u6027\uff0cCAP\u5b9a\u7406\u548cBASE\u201d\u7684\u90e8\u5206\u7684\u4e00\u4e9b\u8865\u5145\u8bf4\u660e\u3002
\n\u7531\u4e8e\u8fd9\u662f\u4e1a\u4f59\u4eba\u58eb\u968f\u610f\u5199\u4e0b\u7684\u60f3\u6cd5\uff0c\u6240\u4ee5\u53ef\u80fd\u5305\u542b\u8bb8\u591a\u6280\u672f\u4e0d\u51c6\u786e\u6216\u5f15\u8d77\u8bef\u89e3\u7684\u63cf\u8ff0\uff0c\u8bf7\u6ce8\u610f\u3002<\/p>\n

\u5173\u4e8eBASE\u7684\u6765\u6e90<\/h1>\n

\u6839\u636e\u641c\u5bfb\u7ed3\u679c\uff0c\u636e\u79f0\u4ee5\u4e0b\u8d44\u6599\u88ab\u8ba4\u4e3a\u662fBASE\u7684\u6765\u6e90\u3002
\n\u5173\u4e8eBASE\u5b58\u5728\u4ee5\u4e0b\u7684\u6743\u8861\u88ab\u63cf\u8ff0\u3002
\n\u203b \u8fd9\u53ef\u80fd\u662f\u5173\u4e8e\u6784\u5efa\u641c\u7d22\u5f15\u64ce\u548cWeb\u7f13\u5b58\u7684\u77e5\u8bc6\uff0c\u4f46\u7531\u4e8e\u5e7b\u706f\u7247\u4e0a\u53ea\u6709\u788e\u7247\u6027\u7684\u4fe1\u606f\uff0c\u6240\u4ee5\u65e0\u6cd5\u4e86\u89e3\u8be6\u7ec6\u60c5\u51b5…
\n\u671d\u7740\u5f3a\u5927\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf
\nhttps:\/\/www.researchgate.net\/publication\/221343719_Towards_robust_distributed_systems<\/p>\n

\u4f46\u4e3a\u4e86\u53ef\u7528\u6027\u3001\u4f18\u96c5\u964d\u7ea7\u548c\u6027\u80fd\uff0c\u6211\u4eec\u653e\u5f03\u4e86”C”\u548c”I”\u3002<\/p><\/blockquote>\n

\u53ef\u4ee5\u770b\u51fa\uff0c\u4e3a\u4e86\u53ef\u7528\u6027\u3001\u4f18\u96c5\u964d\u7ea7\u548c\u6027\u80fd\u8003\u8651\uff0c\u727a\u7272\u4e86\u4e00\u81f4\u6027\u548c\u9694\u79bb\u6027\u3002<\/p>\n

\u6b64\u5916\uff0c\u6709\u5173BASE\u7684\u6280\u672f\u5982\u4e0b\u6240\u8ff0\uff0c\u5c3d\u7ba1\u201cBASE\u201d\u4e00\u8bcd\u672c\u8eab\u5e76\u975e\u6beb\u65e0\u610f\u4e49\uff0c\u4f46\u5b9e\u9645\u4e0a\u5b83\u53ef\u80fd\u66f4\u63a5\u8fd1\u4e8e\u201c\u4e0eACID\u8fdb\u884c\u5bf9\u6bd4\u65f6\u65b9\u4fbf\u7684\u3001\u6613\u4e8e\u8bb0\u5fc6\u7684\u8c10\u97f3\u201d\uff0c\u5b83\u662f\u4e00\u4e2a\u6db5\u76d6\u4e86\u591a\u79cd\u6280\u672f\u7684\u603b\u79f0\uff0c\u7528\u4e8e\u786e\u4fdd\u53ef\u7528\u6027\u3001\u6027\u80fd\u7b49\u5fc5\u8981\u8d28\u91cf\u3002\u5f53\u7136\uff0c\u6211\u8ba4\u4e3a\u4e0d\u5b58\u5728\u4e25\u683c\u7684\u5b9a\u4e49\uff0c\u6bd4\u5982\u201c\u5305\u542b\u54ea\u4e9b\u6280\u672f\u7b97\u4f5cBASE\u201d\u3002<\/p>\n

\u5f31\u4e00\u81f4\u6027
\n– \u8fc7\u671f\u7684\u6570\u636e\u53ef\u4ee5\u63a5\u53d7
\n\u53ef\u7528\u6027\u4f18\u5148
\n\u5c3d\u529b\u800c\u4e3a
\n\u8fd1\u4f3c\u7b54\u6848\u53ef\u4ee5\u63a5\u53d7
\n\u79ef\u6781\uff08\u4e50\u89c2\uff09
\n\u66f4\u7b80\u5355\uff01
\n\u66f4\u5feb\u901f
\n\u66f4\u5bb9\u6613\u8fdb\u5316<\/p><\/blockquote>\n

\u6b64\u5916\uff0c\u8fd8\u6709\u4ee5\u4e0b\u91cd\u8981\u63cf\u8ff0\uff0c\u9996\u5148ACID\u548cBASE\u6280\u672f\u5e76\u975e\u662f\u4e92\u65a5\u9009\u62e9\uff0c\u800c\u662f\u8981\u6839\u636e\u7cfb\u7edf\u9700\u6c42\u8fdb\u884c\u7ec4\u5408\u3002<\/p>\n

\u4f46\u6211\u8ba4\u4e3a\u5b83\u662f\u4e00\u4e2a\u5149\u8c31
\n\u771f\u6b63\u7684\u4e92\u8054\u7f51\u7cfb\u7edf\u662f\u9178\u78b1\u5b50\u7cfb\u7edf\u7684\u8c28\u614e\u6df7\u5408
\n– \u6211\u4eec\u5728\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u548c\u65e5\u5fd7\uff08\u7528\u4e8e\u6536\u5165\uff09\u4e2d\u4f7f\u7528\u9178\u78b1\u3002<\/p><\/blockquote>\n

\u6b64\u5916\uff0c\u201cWeak Consistency\u201d\u4e00\u8bcd\u53d8\u4e3a\u201cstale data OK\u201d\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u5e76\u4e0d\u5b8c\u5168\u7b26\u5408ACID\u4e8b\u52a1\u4e2d\u7684\u4e00\u81f4\u6027\u8981\u6c42\uff08\u5982\u552f\u4e00\u7ea6\u675f\u3001CHECK\u7ea6\u675f\u3001\u5916\u952e\u7b49\uff09\uff0c\u800c\u662f\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u4e00\u81f4\u6027\u6a21\u578b\u4e2d\u63d0\u4f9b\u4e86\u5f31\u4e00\u81f4\u6027\uff08\u4e0d\u4fdd\u8bc1\u5bf9\u526f\u672c\u7684\u539f\u5b50\u66f4\u65b0\uff0c\u4e5f\u4e0d\u80fd\u4fdd\u8bc1\u5f3a\u4e00\u81f4\u6027\uff09\uff0c\u4e3b\u8981\u5c31\u662f\u8868\u660e\u4e86\u8fd9\u4e00\u70b9\u3002
\n\u203b\u7ed3\u679c\u6765\u770b\uff0cWeak Consistency\u4f3c\u4e4e\u662f\u5bf9ACID\u4e00\u81f4\u6027\u8981\u6c42\u7684\u653e\u5bbd…<\/p>\n

RDS\u548cAurora\u662fACID\u7684\u8fd8\u662fBASE\u7684\uff1f<\/h1>\n

\u5728\u5355\u8282\u70b9\u7684\u5173\u7cfb\u6570\u636e\u5e93\u4e2d\uff0c\u4e00\u5f00\u59cb\u5c31\u8981\u505a\u597d\u5728\u4e00\u81f4\u6027\u548c\u9694\u79bb\u6027\u4e0a\u8fdb\u884c\u59a5\u534f\u7684\u51c6\u5907\u3002<\/h2>\n

\u6b63\u5982\u524d\u9762\u6240\u8ff0\uff0cBASE\u7684\u57fa\u672c\u7406\u5ff5\u662f\u201c\u4e3a\u4e86\u6539\u5584\u5176\u4ed6\u54c1\u8d28\u7279\u6027\uff0c\u800c\u59a5\u534f\u4e00\u81f4\u6027\u548c\u9694\u79bb\u6027\u201d\u3002\u4e0d\u8fc7\uff0c\u4e8b\u5b9e\u4e0a\uff0c\u5728\u5355\u8282\u70b9\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4e2d\uff0c\u4e3a\u4e86\u63d0\u9ad8\u6027\u80fd\uff0c\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\u4e5f\u4f1a\u59a5\u534f\u4e00\u81f4\u6027\u548c\u9694\u79bb\u6027\u3002<\/p>\n

\u4f8b\u5982\uff0c\u65e0\u8bba\u662f\u5f00\u653e\u6e90\u4ee3\u7801\u8f6f\u4ef6\uff08OSS\uff09\u8fd8\u662f\u5546\u4e1a\u8f6f\u4ef6\uff0c\u5728\u4e3b\u8981\u7684RDBMS\uff08Oracle\u3001SQL Server\u3001MySQL\u3001PostgreSQL\u7b49\uff09\u4e2d\uff0c\u4e3a\u4e86\u63d0\u9ad8\u4e8b\u52a1\u7684\u5e76\u53d1\u6027\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u9009\u62e9\u7684\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u4e0d\u662f\u53ef\u4e32\u884c\u5316\uff08serializable\uff09\uff0c\u800c\u662f\u8bfb\u63d0\u4ea4\uff08Read Committed\uff09\uff08\u5728MySQL\u4e2d\u4e3a\u53ef\u91cd\u590d\u8bfb\uff09\u3002\u8bf7\u6ce8\u610f\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u6781\u7aef\u7684\u4f8b\u5b50\uff0cSQL Server\u548cDB2\u751a\u81f3\u652f\u6301\u672a\u63d0\u4ea4\u8bfb\uff08Dirty Read\uff09\u3002<\/p>\n

\u4f8b\u5982\uff0c\u5728OSS\u548c\u5546\u4e1a\u8f6f\u4ef6\u4e2d\u7684\u4e3b\u8981RDBMS\uff08\u5982Oracle\u3001SQL Server\u3001MySQL\u3001PostgreSQL\u7b49\uff09\u4e2d\uff0c\u4e3a\u4e86\u63d0\u9ad8\u4e8b\u52a1\u5e76\u53d1\u6027\uff0ctransaction isolation level\u7684\u9ed8\u8ba4\u9009\u62e9\u662fRead Committed\uff08MySQL\u4e2d\u662fRepeatable Read\uff09\uff0c\u800c\u4e0d\u662fSerializable\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u6781\u7aef\u7684\u4f8b\u5b50\uff0cSQL Server\u548cDB2\u751a\u81f3\u652f\u6301\u672a\u63d0\u4ea4\u8bfb\uff08Dirty Read\uff09\u3002<\/p>\n

\u6b64\u5916\uff0c\u4e3a\u4e86\u63d0\u5347\u590d\u6742\u67e5\u8be2\u548c\u89c6\u56fe\u7684\u6027\u80fd\uff0c\u5e38\u5e38\u91c7\u7528\u521b\u5efa\u5e76\u5f02\u6b65\u66f4\u65b0\u7269\u5316\u89c6\u56fe\u7684\u65b9\u6cd5\uff08\u5f53\u7136\uff0c\u8fd9\u4f1a\u5e26\u6765\u5f31\u4e00\u81f4\u6027\uff09\u4f5c\u4e3a\u6027\u80fd\u6539\u8fdb\u7684\u6280\u5de7\u3002<\/p>\n

\u52a0\u5165\uff0c\u5206\u7ec4\u7684\u652f\u6301 \u2260 ACID\u4e8b\u52a1\u7684\u652f\u6301<\/h2>\n

\u5982\u524d\u6587\u6240\u8ff0\uff0c\u201c\u80fd\u5426\u6267\u884cJOIN\u548cGROUP BY\u201d\u662f\u4e0e\u63d0\u4f9b\u7684API\u548c\u67e5\u8be2\u6a21\u578b\u7684\u5dee\u5f02\u76f8\u5173\u7684\u8981\u7d20\uff0c\u4e0d\u540c\u4e8eACID\u548cBASE\u7684\u72ec\u7acb\u8981\u7d20\u3002\u4f8b\u5982\uff0c\u5728RDS\u548cAurora\u4e2d\uff0c\u201c\u5f02\u6b65\u201d\u8bfb\u53d6\u526f\u672c\uff08\u5373\u6700\u7ec8\u4e00\u81f4\u6027\u8bfb\u53d6\uff09\u53ef\u4ee5\u6267\u884cJOIN\u548cGROUP BY\uff08\u5f53\u7136\u65e0\u6cd5\u83b7\u53d6\u6700\u65b0\u503c\uff09\uff0c\u800c\u5b9e\u9645\u4e0a\uff0c\u901a\u8fc7DynamoDB\u7684Athena\u8054\u5408\u67e5\u8be2\uff0c\u4e5f\u53ef\u4ee5\u6267\u884c\u5305\u542bJOIN\u3001GROUP BY\u7b49SQL\u8bed\u53e5\u3002\u8bf7\u6ce8\u610f\uff0c\u201c\u80fd\u591f\u6267\u884cJOIN\u3001GROUP BY\u201d\u4e0e\u201c\u67b6\u6784\u662f\u5426\u9002\u5408\u6267\u884c\u8fd9\u79cd\u590d\u6742\u67e5\u8be2\u5e76\u4e14\u662f\u5426\u9ad8\u6548\u201d\u4ee5\u53ca\u201c\u662f\u5426\u652f\u6301\u7c7b\u4f3cRDB\u7684\u5feb\u7167\u9694\u79bb\u201d\u662f\u5b8c\u5168\u4e0d\u540c\u7684\u65b9\u9762\u3002<\/p>\n

(Translated in simplified Chinese)<\/p>\n

\u5feb\u7167\u9694\u79bb\u4e0d\u662fACID\u4e8b\u52a1\u3002<\/h2>\n

\u6b63\u5982\u4e0a\u4e00\u7bc7\u6587\u7ae0\u4e2d\u8f7b\u8f7b\u63d0\u5230\u7684\uff0c\u6050\u6015\u5728\u672c\u6587\u7684\u4e0a\u4e0b\u6587\u4e2d\uff0c\u6240\u8c13\u201c\u4e00\u81f4\u6027\u201d\u6307\u7684\u662f\u201c\u5728\u6267\u884c\u641c\u7d22\u67e5\u8be2\u65f6\uff0c\u6570\u636e\u5e93\u901a\u8fc7LSN \/ SCN\u663e\u793a\u4e3a\u4e00\u81f4\u7684\u5feb\u7167\u9694\u79bb\u652f\u6301\u201d\u3002\u7136\u800c\uff0c\u5c3d\u7ba1\u8fd9\u4e2a\u5904\u7406\u9700\u8981\u662f\u201c\u5728\u67d0\u4e00\u70b9\u4e0a\u6574\u4e2a\u6570\u636e\u5e93\u90fd\u662f\u4e00\u81f4\u7684\u6570\u636e\u201d\uff0c\u4f46\u4e0d\u4e00\u5b9a\u9700\u8981\u662f\u53cd\u6620\u6700\u65b0\u6570\u636e\u7684\u5f3a\u4e00\u81f4\u6027\u8bfb\u53d6\uff0c\u5feb\u7167\u9694\u79bb\u4e5f\u53ef\u4ee5\u5728\u8bfb\u53d6\u526f\u672c\u4e0a\u5b9e\u73b0\u3002<\/p>\n

\u76ee\u524d\uff0c\u5728DynamoDB\u4e2d\uff0c\u8981\u8de8\u591a\u4e2a\u5206\u533a\u548c\u9879\u76ee\u83b7\u53d6\u4e00\u81f4\u6027\u6570\u636e\uff0c\u76ee\u524d\u53ea\u80fd\u901a\u8fc7\u6267\u884cTransactGetItems\u6765\u5b9e\u73b0\u3002\u7531\u4e8e\u4ee5\u4e0b\u9650\u5236\uff0c\u53ef\u4ee5\u8bf4\u57fa\u4e8e\u201c\u6570\u636e\u5e93\u6574\u4f53\u4e00\u81f4\u6027\u6570\u636e\u201d\u7684\u590d\u6742\u5206\u6790\u67e5\u8be2\u66f4\u9002\u5408\u5173\u7cfb\u578b\u6570\u636e\u5e93\u3002<\/p>\n

    \n
  • \n
      2022\u5e745\u6708\u6642\u70b9\u3067\u6700\u592725\u30a2\u30a4\u30c6\u30e0\u307e\u3067\u3057\u304b\u53c2\u7167\u3067\u304d\u306a\u3044\u3053\u3068<\/ul>\n<\/li>\n<\/ul>\n

       <\/p>\n

        \n
      • \n
          \u5fc5\u305a\u4e3b\u30ad\u30fc\u3067\u691c\u7d22\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3053\u3068<\/ul>\n<\/li>\n<\/ul>\n

           <\/p>\n

            Join, Group By\u7b49\u304cAPI\u3068\u3057\u3066\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068<\/ul>\n

            \u7136\u800c\uff0c\u5982\u524d\u6240\u8ff0\uff0c\u201c\u53ea\u9700\u8981\u67e5\u770b\u7279\u5b9a\u65f6\u95f4\u70b9\u7684\u5feb\u7167\u6570\u636e\u201d\u610f\u5473\u7740\u53ef\u4ee5\u653e\u5bbd\u5bf9\u4e00\u81f4\u6027\u548c\u9694\u79bb\u6027\u7684\u8981\u6c42\uff0c\u8fd9\u4e0eACID\u548cBASE\u7684\u6bd4\u8f83\u662f\u4e0d\u540c\u7684\u5143\u7d20\u3002<\/p>\n

            Aurora\u548cRDS\u5fc5\u987b\u5229\u7528\u201c\u5f02\u6b65\u201d\u8bfb\u53d6\u526f\u672c\u3002<\/h2>\n

            \u5728Aurora\u548cRDS\u4e2d\uff0cWriter\u53ea\u6709\u4e00\u4e2a\uff0c\u4e3a\u4e86\u6269\u5c55\u5904\u7406\u6027\u80fd\uff0c\u9700\u8981\u5229\u7528”\u5f02\u6b65”\u8bfb\u53d6\u526f\u672c\u3002\u56e0\u6b64\uff0c\u5728Aurora\u548cRDS\u4e2d\uff0c\u91c7\u7528BASE\u8303\u5f0f\u7684\u6280\u672f\u6765\u7f13\u89e3\u4e00\u81f4\u6027\u95ee\u9898\u4f3c\u4e4e\u662f\u5927\u89c4\u6a21Web\u7cfb\u7edf\u4e2d\u51e0\u4e4e\u5fc5\u9700\u7684\u6280\u672f\u3002<\/p>\n

            \u53e6\u4e00\u65b9\u9762\uff0c\u5173\u4e8e\u5199\u5165\u64cd\u4f5c\uff0c\u5b83\u5728\u5355\u4e00\u8282\u70b9\u4e0a\u6267\u884c\uff0c\u901a\u8fc7\u727a\u7272\u53ef\u7528\u6027\u548c\u53ef\u6269\u5c55\u6027\u6765\u652f\u6301ACID\u4e8b\u52a1\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u770b\u51fa\u5904\u7406\u4e2d\u5305\u542b\u4e86ACID\u548cBASE\u8fd9\u4e24\u4e2a\u8981\u7d20\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u5904\u7406\u7684\u5185\u5bb9\u3002<\/p>\n

            \u603b\u7ed3<\/h2>\n

            \u4e0a\u8ff0\u7684\u65b9\u6cd5\u5728\u5173\u7cfb\u6570\u636e\u5e93\u4e2d\u4e5f\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u63d0\u9ad8\u6027\u80fd\u7684\u624b\u6bb5\uff0c\u5373\u901a\u8fc7\u51cf\u8f7b\u4e00\u81f4\u6027\u548c\u9694\u79bb\u6027\u3002\u6b64\u5916\uff0c\u5173\u4e8e\u8fde\u63a5\u3001\u5206\u7ec4\u548c\u5feb\u7167\u9694\u79bb\uff0c\u867d\u7136\u5728\u5173\u7cfb\u6570\u636e\u5e93\u4e2d\u66f4\u64c5\u957f\u5904\u7406\uff0c\u4f46\u5b9e\u9645\u4e0a\u4e5f\u53ef\u4ee5\u5728\u57fa\u4e8eBASE\u8303\u5f0f\u7684\u73af\u5883\u4e0b\u5b9e\u65bd\uff0c\u5e76\u4e0d\u4e00\u5b9a\u9700\u8981\u59cb\u7ec8\u4ee5\u5f3a\u4e00\u81f4\u6027\u548c\u5f3a\u9694\u79bb\u6027\u8fdb\u884c\u6267\u884c\u3002<\/p>\n

            DynamoDB\u662fACID\u8fd8\u662fBASE\uff1f<\/h1>\n

            \u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8ba8\u8bbaDynamoDB\u662fACID\u8fd8\u662fBASE\u3002<\/p>\n

            \u539f\u59cbDynamo\uff082007\u5e74\uff09\u548cDynamoDB\uff082012\u5e74\uff09\u4e4b\u95f4\u7684\u5dee\u5f02\u3002<\/h2>\n

            \u9996\u5148\u4f5c\u4e3a\u524d\u63d0\u6761\u4ef6\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u867d\u7136\u300aDynamo\u300b\u8bba\u6587\u4e8e2007\u5e74\u53d1\u5e03\uff0c\u800c\u300aDynamoDB\u300b\u4e8e2012\u5e74\u53d1\u5e03\uff0c\u4e8c\u8005\u4e4b\u95f4\u5b58\u5728\u76f8\u5173\u6027\uff0c\u4f46\u5b83\u4eec\u5374\u662f\u201c\u4e0d\u540c\u7684\u4ea7\u54c1\u201d\uff0c\u5e76\u4e14\u5728\u67b6\u6784\u4e0a\u5b58\u5728\u5dee\u5f02\u3002<\/p>\n

            \u901a\u8fc7\u7ed3\u5408\u539f\u59cbDynamo\u548cSimpleDB\u53d7\u5230\u597d\u8bc4\u7684\u7279\u70b9\uff0c\u53d1\u5c55\u51fa\u4e86DynamoDB\u3002\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u539f\u59cbDynamo\u7684\u7279\u6027\u3002\u4e9a\u9a6c\u900a\u7684DynamoDB\u662f\u4e00\u79cd\u4e13\u4e3a\u4e92\u8054\u7f51\u89c4\u6a21\u5e94\u7528\u8bbe\u8ba1\u7684\u5feb\u901f\u3001\u53ef\u6269\u5c55\u7684NoSQL\u6570\u636e\u5e93\u670d\u52a1\u3002
            \n\u53c2\u8003\u94fe\u63a5\uff1ahttps:\/\/www.allthingsdistributed.com\/2012\/01\/amazon-dynamodb.html<\/p>\n

            \u6839\u636e\u300aDynamo Paper\u300b\u4e2d\u5bf9\u539f\u59cbDynamo\u7684\u63cf\u8ff0\uff0c\u53ef\u4ee5\u770b\u51fa\u539f\u59cbDynamo\u662f\u4e3a\u4e86amazon.com\u7684\u8d2d\u7269\u8f66\u4f7f\u7528\u800c\u8bbe\u8ba1\u7684\uff0c\u5b83\u66f4\u6ce8\u91cd\u4e8e\u201c\u59cb\u7ec8\u80fd\u591f\u8bfb\u5199\u201d\u7684\u7279\u70b9\uff0c\u800c\u975e\u5f3a\u4e00\u81f4\u6027\u3002<\/p>\n

            \u56e0\u6b64\uff0c\u8d1f\u8d23\u7ba1\u7406\u8d2d\u7269\u8f66\u7684\u670d\u52a1\u9700\u8981\u80fd\u591f\u59cb\u7ec8\u5bf9\u5176\u6570\u636e\u5b58\u50a8\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\uff0c\u5e76\u4e14\u5b83\u7684\u6570\u636e\u9700\u8981\u5728\u591a\u4e2a\u6570\u636e\u4e2d\u5fc3\u4e4b\u95f4\u53ef\u7528\u3002<\/p><\/blockquote>\n

            \u901a\u8fc7\u91c7\u7528Multi-Master\uff08\u65e0\u4e3b\u673a\uff09\u67b6\u6784\uff0c\u540c\u65f6\u5bf9\u591a\u4e2a\u8282\u70b9\u8fdb\u884c\u5199\u5165\u7279\u5b9a\u7684\u9879\u76ee\uff0c\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0Sloppy Quorum\u3001Vector clock\u6216\u5728\u5ba2\u6237\u7aef\u8fdb\u884c\u8bfb\u53d6\u65f6\u8fdb\u884c\u5904\u7406\u6765\u63d0\u9ad8\u53ef\u7528\u6027\uff0c\u5e76\u4e3a\u4e34\u65f6\u670d\u52a1\u5668\u6545\u969c\u505a\u597d\u51c6\u5907\u3002<\/p>\n

            \u9ad8\u53ef\u7528\u6027\u7684\u5199\u64cd\u4f5c
            \n\u4f7f\u7528\u5411\u91cf\u65f6\u949f\u5728\u8bfb\u64cd\u4f5c\u4e2d\u8fdb\u884c\u8c03\u548c
            \n\u5904\u7406\u4e34\u65f6\u6545\u969c
            \n\u677e\u6563\u4e00\u81f4\u6027\u548c\u63d0\u793a\u8f6c\u4ea4<\/p><\/blockquote>\n

            \u7531\u4e8e\u5728\u591a\u4e2a\u8282\u70b9\u4e0a\u540c\u65f6\u8fdb\u884c\u5199\u5165\u64cd\u4f5c\uff0c\u5e76\u4e14\u5b58\u5728\u6570\u636e\u4e0d\u4e00\u81f4\u7684\u53ef\u80fd\u6027\uff0c\u56e0\u6b64\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u9700\u8981\u8fdb\u884c\u540c\u6b65\u64cd\u4f5c\u3002
            \n\u203b \u8fd9\u4e0eBASE\u4e2d\u7684\u8f6f\u72b6\u6001\u548c\u6700\u7ec8\u4e00\u81f4\u6027\u7279\u6027\u76f8\u5bf9\u5e94\u3002<\/p>\n

            \u4ece\u6c38\u4e45\u6027\u5931\u6548\u4e2d\u6062\u590d
            \n\u4f7f\u7528\u9ed8\u514b\u5c14\u6811\u8fdb\u884c\u53cd\u71b5\u5904\u7406<\/p><\/blockquote>\n

            \u8bf7\u53c2\u8003\u4ee5\u4e0b\u4e2d\u6587\u7ffb\u8bd1\uff1a<\/p>\n

            \u5982\u4e0a\u6240\u8ff0\uff0c\u4e0e\u7b80\u5355\u7684Quorum Read\/Write\u76f8\u5173\u7684\u95ee\u9898\u5b58\u5728\u4e00\u4e2a\u6839\u672c\u6027\u7684\u96be\u9898\uff0c\u5373\u201c\u5728\u8282\u70b9\u4e4b\u95f4\u65e0\u6cd5\u8fbe\u6210\u5171\u8bc6\u5f62\u6210\u7684\u503c\u4e0d\u5b58\u5728\u201d\uff0c\u56e0\u6b64\u65e0\u6cd5\u786e\u4fddSingle key\u7684\u7ebf\u6027\u53ef\u7528\u6027\uff0c\u5373\u4f7f\u8fdb\u884c\u4e86\u5404\u79cd\u8bbe\u8ba1\u4e5f\u65e0\u6d4e\u4e8e\u4e8b\u3002\u6b64\u5916\uff0c\u7531\u4e8e\u7f3a\u4e4f\u56de\u6eda\u64cd\u4f5c\uff0c\u6211\u4eec\u8fd8\u4e86\u89e3\u5230\u4e3a\u4e86\u63d0\u9ad8\u6027\u80fd\uff0c\u51cf\u5c11\u67e5\u8be2\u8282\u70b9\u7684\u6570\u91cf\u4f1a\u5e26\u6765Dirty Read\u7684\u98ce\u9669\u3002<\/p>\n

            \u57282012\u5e74\u63a8\u51fa\u7684DynamoDB\u4e2d\uff0c\u8fd9\u4e00\u90e8\u5206\u5df2\u7ecf\u5f97\u5230\u6539\u8fdb\u3002\u5728\u5206\u533a\u5185\u8fdb\u884cLeader\u9009\u4e3e\uff0c\u5e76\u901a\u8fc7Leader\u8fdb\u884c\u5199\u5165\u64cd\u4f5c\u3002\u5728\u5206\u533a\u5185\uff0c\u7ecf\u8fc7\u540c\u610f\u7684\u8282\u70b9\u4f5c\u4e3aLeader\uff0c\u4e00\u5b9a\u4f1a\u4fdd\u5b58\u6700\u65b0\u7684\u7ed3\u679c\uff0c\u786e\u4fdd\u5728Single key\u6a21\u5f0f\u4e0b\u7684\u7ebf\u6027\u4e00\u81f4\u6027\u3002<\/p>\n

            \u4ece\u4e0a\u9762\u7684\u89c6\u9891\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u88ab\u79f0\u4e3a”Eventual Consistency Read”\u64cd\u4f5c\u5b9e\u9645\u4e0a\u5728\u5b9e\u9645\u4e2d\u662f”\u4ee52\/3\u7684\u6982\u7387\u83b7\u53d6\u5230\u6700\u65b0\u7684\u6570\u636e”\uff0c\u5e76\u4e14\u4e0d\u4e00\u81f4\u7684\u6570\u636e\u53ea\u662f”\u7b80\u5355\u5730\u8fc7\u65f6\u4e86”\uff0c\u662f\u5728\u4e4b\u524d\u7531Leader\u63d0\u4ea4\u7684\u503c\uff0c\u4e0d\u5b58\u5728\u50cf\u4e4b\u524d\u63d0\u5230\u7684”Quorum Read”\u90a3\u6837\u7684\u810f\u8bfb\u98ce\u9669\u3002<\/p>\n

            \u203b\u7531\u4e8e\u5171\u8bc6\u534f\u8bae\u7684\u590d\u6742\u6027\uff0c\u6211\u65e0\u6cd5\u5b8c\u5168\u4e86\u89e3\u662f\u5426\u771f\u7684\u6ca1\u6709\u8fb9\u7f18\u60c5\u51b5\uff0c\u4f46\u5982\u679c\u8003\u8651\u5b9e\u65bd\uff0c\u90a3\u5c06\u662f\u975e\u5e38\u56f0\u96be\u7684…<\/p>\n

            \u6839\u636e\u4e0a\u8ff0\u7ed3\u6784\uff0c\u5728DynamoDB\u4e2d\u53ef\u80fd\u4f1a\u5931\u53bb\u4e86\u539f\u59cbDynamo\u7684\u201c\u5199\u5165\u9ad8\u53ef\u7528\u6027\u201d\u7279\u6027\uff0c\u5373\u4f7f\u90e8\u5206\u670d\u52a1\u5668\u5b95\u673a\u65f6\u4ecd\u53ef\u4ee5\u6267\u884c\u5199\u5165\u64cd\u4f5c\uff0c\u4f46\u6839\u636e\u4e0b\u6587\u6240\u8ff0\u7684\u6587\u7ae0\uff0c\u9886\u5bfc\u8005\u9009\u4e3e\u5177\u6709\u8bb8\u591a\u4f18\u70b9\uff0c\u56e0\u6b64\u53ef\u80fd\u5df2\u7ecf\u8fdb\u884c\u4e86\u8fd9\u79cd\u7ed3\u6784\u4e0a\u7684\u66f4\u6539\u3002<\/p>\n

            \u6b64\u5916\u3001\u300cAmazon DynamoDB \u2013 \u4e00\u79cd\u4e13\u4e3a\u4e92\u8054\u7f51\u89c4\u6a21\u5e94\u7528\u8bbe\u8ba1\u7684\u5feb\u901f\u53ef\u6269\u5c55\u7684NoSQL\u6570\u636e\u5e93\u670d\u52a1\u300d\u4e2d\u8fd8\u5b58\u5728\u4ee5\u4e0b\u63cf\u8ff0\uff0c\u5e76\u5f3a\u8c03\u4e86\u4e0d\u5f3a\u5236\u7279\u5b9a\u7684\u4e00\u81f4\u6027\u6a21\u578b\u3002
            \n\u203b\u8fd9\u6bb5\u63cf\u8ff0\u5e76\u975e\u5173\u4e8e\u524d\u8ff0\u7684ACID\uff0cBASE\u8303\u5f0f\u7684\u6bd4\u8f83\uff0c\u800c\u662f\u4e13\u6ce8\u4e8e\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4e00\u81f4\u6027\u6a21\u578b\uff0c\u8001\u5b9e\u8bf4\u6211\u89c9\u5f97\u8fd9\u66f4\u52a0\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n

            \u7075\u6d3b\u3002Amazon DynamoDB\u662f\u4e00\u4e2a\u975e\u5e38\u7075\u6d3b\u7684\u7cfb\u7edf\uff0c\u4e0d\u5f3a\u5236\u7528\u6237\u91c7\u7528\u7279\u5b9a\u7684\u6570\u636e\u6a21\u578b\u6216\u4e00\u81f4\u6027\u6a21\u578b\u3002DynamoDB\u8868\u6ca1\u6709\u56fa\u5b9a\u7684\u6a21\u5f0f\uff0c\u800c\u662f\u5141\u8bb8\u6bcf\u4e2a\u6570\u636e\u9879\u62e5\u6709\u4efb\u610f\u6570\u91cf\u7684\u5c5e\u6027\uff0c\u5305\u62ec\u591a\u503c\u5c5e\u6027\u3002\u5f00\u53d1\u4eba\u5458\u5728\u8bbf\u95ee\u6570\u636e\u5e93\u65f6\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528\u66f4\u5f3a\u7684\u4e00\u81f4\u6027\u6a21\u578b\uff0c\u4ee5\u7b80\u5316\u6a21\u578b\u4e3a\u4ee3\u4ef7\u727a\u7272\u4e00\u4e9b\u6027\u80fd\u548c\u53ef\u7528\u6027\u3002\u4ed6\u4eec\u8fd8\u53ef\u4ee5\u5229\u7528DynamoDB\u7684\u539f\u5b50\u81ea\u589e\/\u81ea\u51cf\u529f\u80fd\u6765\u5b9e\u73b0\u8ba1\u6570\u5668\u3002<\/p><\/blockquote>\n

            \u603b\u7ed3<\/h2>\n

            \u6839\u636e\u4ee5\u4e0a\u5185\u5bb9\uff0c\u5728DynamoDB\u4e2d\uff0c\u6027\u80fd\u548c\u53ef\u7528\u6027\u90fd\u5f88\u91cd\u8981\u3002\u867d\u7136\u8be5\u4ea7\u54c1\u652f\u6301\u57fa\u4e8eBASE\u8303\u5f0f\u7684\u6700\u7ec8\u4e00\u81f4\u6027\u8bfb\u53d6\uff0c\u4f46\u76ee\u524d\u7684DynamoDB\u652f\u6301\u7ebf\u6027\u4e00\u81f4\u6027\uff0c\u5e76\u4e14\u6ca1\u6709\u5f3a\u5236\u5b9e\u65bd\u7279\u5b9a\u7684\u4e00\u81f4\u6027\u6a21\u578b\u3002<\/p>\n

            \u6b64\u5916\uff0c\u6b63\u5982\u4e0a\u7bc7\u6587\u7ae0\u6240\u8ff0\uff0cDynamoDB\u8fd8\u652f\u6301\u8de8\u591a\u4e2a\u8282\u70b9\/\u9879\u7684ACID\u4e8b\u52a1\u3002\u5c3d\u7ba1\u4e0e\u5173\u7cfb\u6570\u636e\u5e93\u5177\u6709\u6570\u636e\u6a21\u578b\u548cAPI\u4e0a\u7684\u5dee\u5f02\uff0c\u4f46DynamoDB\u65e2\u5305\u542bACID\u8303\u5f0f\u7684\u8981\u7d20\uff0c\u4e5f\u5305\u542bBASE\u8303\u5f0f\u7684\u8981\u7d20\uff0c\u56e0\u6b64\u9700\u8981\u6839\u636e\u5e94\u7528\u7a0b\u5e8f\u7684\u8981\u6c42\u8fdb\u884c\u9009\u62e9\u3002<\/p>\n

            \u90a3\u4e48\uff0c\u5982\u679c\u4e0d\u4f7f\u7528CAP\uff0cACID\u548cBASE\u8fd9\u4e9b\u672f\u8bed\uff0c\u6211\u4eec\u5e94\u8be5\u5982\u4f55\u89e3\u91ca\u5b83\u4eec\u7684\u533a\u522b\u5462\uff1f<\/h1>\n

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