{"id":1758,"date":"2018-10-19T23:43:15","date_gmt":"2018-10-19T15:43:15","guid":{"rendered":"https:\/\/damogame.cn:15443\/wordpress\/?p=1758"},"modified":"2018-10-19T23:43:15","modified_gmt":"2018-10-19T15:43:15","slug":"%e9%98%bf%e9%87%8c%e8%b5%84%e6%b7%b1%e6%9e%b6%e6%9e%84%e5%b8%88%e6%95%99%e4%bd%a0%e5%a6%82%e4%bd%95%e8%ae%be%e8%ae%a1%e5%87%ba%e4%b8%80%e4%b8%aa%e5%ae%8c%e7%be%8e%e7%9a%84%e5%88%86%e5%b8%83%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/1758","title":{"rendered":"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f"},"content":{"rendered":"<h1 class=\"article-title\">\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f<\/h1>\n<div class=\"article-sub\">\u4e92\u8054\u7f51Java\u67b6\u6784\u00a02018-10-19 15:31:08<\/div>\n<div class=\"article-content\">\n<div>\n<h1>1. \u5206\u5e03\u5f0f\u7cfb\u7edf\u76f8\u5173\u6982\u5ff5<\/h1>\n<p>1.1 \u6a21\u578b<\/p>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p1.pstatp.com\/large\/pgc-image\/15399325766533c36f254d1\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<p>1.1.1 \u8282\u70b9<\/p>\n<p>\u8282\u70b9\u662f\u4e00\u4e2a\u53ef\u4ee5\u72ec\u7acb\u6309\u7167\u5206\u5e03\u5f0f\u534f\u8bae\u5b8c\u6210\u4e00\u7ec4\u903b\u8f91\u7684\u7a0b\u5e8f\u4e2a\u4f53\uff0c\u5de5\u7a0b\u4e2d\u5f80\u5f80\u6307\u8fdb\u7a0b\u3002<\/p>\n<p>1.1.2 \u901a\u4fe1<\/p>\n<p>\u8282\u70b9\u4e4b\u95f4\u5b8c\u5168\u72ec\u7acb\u4e92\u76f8\u9694\u79bb\uff0c\u901a\u4fe1\u552f\u4e00\u65b9\u5f0f\u662f\u901a\u8fc7\u4e0d\u53ef\u9760\u7684\u7f51\u7edc\u3002<\/p>\n<p>1.1.3 \u5b58\u50a8<\/p>\n<p>\u8282\u70b9\u53ef\u4ee5\u901a\u8fc7\u5c06\u6570\u636e\u5199\u5165\u4e0e\u8282\u70b9\u5728\u540c\u4e00\u53f0\u673a\u5668\u7684\u672c\u5730\u5b58\u50a8\u8bbe\u5907\u4fdd\u5b58\u6570\u636e<\/p>\n<p>1.1.4 \u5f02\u5e38<\/p>\n<p>(1) \u673a\u5668down\u673a<\/p>\n<p>\u5927\u578b\u96c6\u7fa4\u6bcf\u65e5down\u673a\u53d1\u751f\u6982\u73870.1%\uff0c\u540e\u679c\u662f\u8be5\u673a\u5668\u8282\u70b9\u4e0d\u80fd\u5de5\u4f5c\u3001\u91cd\u542f\u540e\u5931\u53bb\u6240\u6709\u5185\u5b58\u4fe1\u606f\u3002<\/p>\n<p>(2) \u7f51\u7edc\u5f02\u5e38<\/p>\n<ul>\n<li>\u6d88\u606f\u4e22\u5931\uff1a\u7f51\u7edc\u62e5\u585e\u3001\u8def\u7531\u53d8\u52a8\u3001\u8bbe\u5907\u5f02\u5e38\u3001network partition\uff08\u90e8\u5206\u4e0d\u6b63\u5e38\uff09<\/li>\n<li>\u6d88\u606f\u4e71\u5e8f\uff1aIP\u5b58\u50a8\u8f6c\u53d1\u3001\u8def\u7531\u4e0d\u786e\u5b9a\u6027\u3001\u7f51\u7edc\u62a5\u6587\u4e71\u5e8f<\/li>\n<li>\u6570\u636e\u9519\u8bef\uff1a\u6bd4\u7279\u9519\u8bef<\/li>\n<li>\u4e0d\u53ef\u9760TCP\uff1a\u5230\u8fbe\u534f\u8bae\u6808\u4e4b\u540e\u4e0e\u5230\u8fbe\u8fdb\u7a0b\u4e4b\u95f4\u3001\u7a81\u7136down\u673a\u3001\u5206\u5e03\u5f0f\u591a\u4e2a\u8282\u70b9\u7684tcp\u4e71\u5e8f<\/li>\n<\/ul>\n<p>(3) \u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u4e09\u6001<\/p>\n<p>\u4efb\u4f55\u8bf7\u6c42\u90fd\u8981\u8003\u8651\u4e09\u79cd\u60c5\u51b5\uff1a\u6210\u529f\u3001\u5931\u8d25\u3001\u8d85\u65f6\u3002\u5bf9\u4e8e\u8d85\u65f6\u7684\u8bf7\u6c42\uff0c\u65e0\u6cd5\u83b7\u77e5\u8be5\u8bf7\u6c42\u662f\u5426\u88ab\u6210\u529f\u6267\u884c\u3002<\/p>\n<p>(4) \u5b58\u50a8\u6570\u636e\u4e22\u5931<\/p>\n<p>(5) \u5176\u4ed6\u5f02\u5e38<\/p>\n<p>IO\u64cd\u4f5c\u7f13\u6162\u3001\u7f51\u7edc\u6296\u52a8\u3001\u62e5\u585e<\/p>\n<p>1.2 \u526f\u672c<\/p>\n<p>1.2.1 \u526f\u672c\u7684\u6982\u5ff5<\/p>\n<p>replica\/copy \u6307\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u4e3a\u6570\u636e\u6216\u670d\u52a1\u63d0\u4f9b\u7684\u5197\u4f59\uff1a<\/p>\n<ul>\n<li>\u6570\u636e\u526f\u672c\uff1a\u5728\u4e0d\u540c\u7684\u8282\u70b9\u4e0a\u6301\u4e45\u5316\u540c\u4e00\u4efd\u6570\u636e\u3002\u4f8b\u5982GFS\u540c\u4e00\u4e2achunk\u7684\u6570\u4e2a\u526f\u672c<\/li>\n<li>\u670d\u52a1\u526f\u672c\uff1a\u6570\u4e2a\u8282\u70b9\u63d0\u4f9b\u76f8\u540c\u7684\u670d\u52a1\uff0c\u670d\u52a1\u4e0d\u4f9d\u8d56\u672c\u5730\u5b58\u50a8\uff0c\u6570\u636e\u6765\u81ea\u5176\u4ed6\u8282\u70b9\u3002\u4f8b\u5982Map Reduce\u7684Job Worker<\/li>\n<\/ul>\n<p>1.2.2 \u526f\u672c\u7684\u4e00\u81f4\u6027<\/p>\n<p>\u526f\u672c\u7684consistency\u662f\u9488\u5bf9\u5206\u5e03\u5f0f\u7cfb\u7edf\u800c\u8a00\u7684\uff0c\u4e0d\u662f\u9488\u5bf9\u67d0\u4e00\u4e2a\u526f\u672c\u800c\u8a00\u3002\u6839\u636e\u5f3a\u5f31\u7a0b\u5ea6\u5206\u4e3a\uff1a<\/p>\n<ul>\n<li>\u5f3a\u4e00\u81f4\u6027\uff1a\u4efb\u4f55\u65f6\u523b\u4efb\u4f55\u7528\u6237\/\u8282\u70b9\u90fd\u53ef\u4ee5\u8bfb\u5230\u6700\u8fd1\u4e00\u6b21\u66f4\u65b0\u6210\u529f\u7684\u526f\u672c\u6570\u636e<\/li>\n<li>\u5355\u8c03\u4e00\u81f4\u6027\uff1a\u4efb\u4f55\u65f6\u523b\u4efb\u4f55\u7528\u6237\u4e00\u65e6\u8bfb\u5230\u67d0\u4e2a\u6570\u636e\u67d0\u6b21\u66f4\u65b0\u540e\u7684\u503c\uff0c\u5c31\u4e0d\u4f1a\u518d\u8bfb\u5230\u66f4\u65e7\u7684\u503c<\/li>\n<li>\u4f1a\u8bdd\u4e00\u81f4\u6027\uff1a\u4efb\u4f55\u65f6\u523b\u4efb\u4f55\u7528\u6237\u5728\u67d0\u6b21\u4f1a\u8bdd\u5185\u4e00\u65e6\u8bfb\u5230\u67d0\u4e2a\u6570\u636e\u67d0\u6b21\u66f4\u65b0\u540e\u7684\u503c\uff0c\u5c31\u4e0d\u4f1a\u5728\u8fd9\u6b21\u4f1a\u8bdd\u518d\u8bfb\u5230\u66f4\u65e7\u7684\u503c<\/li>\n<li>\u6700\u7ec8\u4e00\u81f4\u6027\uff1a\u5404\u4e2a\u526f\u672c\u7684\u6570\u636e\u6700\u7ec8\u5c06\u8fbe\u5230\u4e00\u81f4\u72b6\u6001\uff0c\u4f46\u65f6\u95f4\u4e0d\u4fdd\u8bc1<\/li>\n<li>\u5f31\u4e00\u81f4\u6027\uff1a\u6ca1\u6709\u5b9e\u7528\u4ef7\u503c\uff0c\u7565\u3002<\/li>\n<\/ul>\n<p>1.3 \u8861\u91cf\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u6307\u6807<\/p>\n<p>1.3.1 \u6027\u80fd<\/p>\n<ul>\n<li>\u541e\u5410\u91cf\uff1a\u67d0\u4e00\u65f6\u95f4\u53ef\u4ee5\u5904\u7406\u7684\u6570\u636e\u603b\u91cf<\/li>\n<li>\u54cd\u5e94\u5ef6\u8fdf\uff1a\u5b8c\u6210\u67d0\u4e00\u529f\u80fd\u9700\u8981\u4f7f\u7528\u7684\u65f6\u95f4<\/li>\n<li>\u5e76\u53d1\u80fd\u529b\uff1aQPS(query per second)<\/li>\n<\/ul>\n<p>1.3.2 \u53ef\u7528\u6027<\/p>\n<p>\u7cfb\u7edf\u505c\u670d\u52a1\u7684\u65f6\u95f4\u4e0e\u6b63\u5e38\u670d\u52a1\u7684\u65f6\u95f4\u7684\u6bd4\u4f8b<\/p>\n<p>1.3.3 \u53ef\u6269\u5c55\u6027<\/p>\n<p>\u901a\u8fc7\u6269\u5c55\u96c6\u7fa4\u673a\u5668\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\u3001\u5b58\u50a8\u5bb9\u91cf\u3001\u8ba1\u7b97\u80fd\u529b\u7684\u7279\u6027\uff0c\u662f\u5206\u5e03\u5f0f\u7cfb\u7edf\u7279\u6709\u7684\u6027\u8d28<\/p>\n<p>1.3.4 \u4e00\u81f4\u6027<\/p>\n<p>\u526f\u672c\u5e26\u6765\u7684\u4e00\u81f4\u6027\u95ee\u9898<\/p>\n<p><strong>1.3.5\uff1a\u5206\u5e03\u5f0f\u67b6\u6784\u7cfb\u7edf\u7684\u53ef\u89c6\u5316\u76d1\u63a7\u65b9\u6848<\/strong><\/p>\n<blockquote><p>1\u3001\u67b6\u6784\u5e08\u662f\u5982\u4f55\u89e3\u51b3\u5206\u5e03\u5f0f\u67b6\u6784\u7cfb\u7edf\u76d1\u63a7\u96be\u9898\u7684\u3002<\/p>\n<p>2\u3001ELK\u662f\u8c01\uff0c\u4ece\u54ea\u91cc\u6765\uff0c\u8981\u5230\u54ea\u91cc\u53bb\uff1f<\/p>\n<p>3\u3001\u4eac\u4e1c\u6d77\u91cf\u6570\u636e\u68c0\u7d22\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u611f\u53d7\u3002<\/p>\n<p>4\u3001\u53ea\u9700\u70b9\u51fb\u9f20\u6807\uff0c\u9ad8\u903c\u683c\u76d1\u63a7\u754c\u9762\u4e00\u952e\u641e\u5b9a\u3002<\/p>\n<p>5\u3001\u4f60\u79bb\u4e92\u8054\u7f51\u67b6\u6784\u5e08\u5230\u5e95\u6709\u8fdc\uff1f\u542c\u542c\u5c31\u77e5\u9053\u3002<\/p>\n<p>6\u3001\u67b6\u6784\u5e08\u7684\u6280\u672f\u6808\u5e94\u8be5\u662f\u600e\u6837\u7684\uff1f\u4f60\u6765\u95ee\uff0c\u6211\u4e00\u5b9a\u7b54\u3002<\/p><\/blockquote>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p3.pstatp.com\/large\/pgc-image\/15399339612328e33e3852b\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p98.pstatp.com\/large\/pgc-image\/1539934028607eec903bd89\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<p>\u8f6c\u53d1 \u8f6c\u53d1 \u8f6c\u53d1 \u91cd\u8981\u7684\u4e8b\u60c5\u8bf43\u904d \u8f6c\u53d1\u5173\u6ce8\u6211\u79c1\u4fe1\u4f1a\u53d1:Java\u67b6\u6784 \u9886\u53d6\u5206\u5e03\u5f0f\u67b6\u6784\u601d\u7ef4\u5bfc\u56fe \u4ee5\u53ca\u8d44\u6df1\u67b6\u6784\u5e08\u8bb2\u89e3\u7684\u5206\u5e03\u5f0f\u7cbe\u8bb2\u89c6\u9891\u8d44\u6599\uff08\u8fd8\u4f1a\u63d0\u4f9b\u9ad8\u5e76\u53d1\uff0cspring\u6e90\u7801\uff0cmybatis\u6e90\u7801\uff0cdubbo\uff0cnetty\u7b49\u591a\u4e2a\u77e5\u8bc6\u70b9\u7684\u89c6\u9891\u6280\u672f\u5206\u4eab\uff01<\/p>\n<h1>2. \u5206\u5e03\u5f0f\u7cfb\u7edf\u539f\u7406<\/h1>\n<p>2.1 \u6570\u636e\u5206\u5e03\u65b9\u5f0f<\/p>\n<p>\u65e0\u8bba\u8ba1\u7b97\u8fd8\u662f\u5b58\u50a8\uff0c\u95ee\u9898\u8f93\u5165\u5bf9\u8c61\u90fd\u662f\u6570\u636e\uff0c\u5982\u4f55\u62c6\u5206\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u8f93\u5165\u6570\u636e\u79f0\u4e3a\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u57fa\u672c\u95ee\u9898\u3002<\/p>\n<p>2.1.1 \u54c8\u5e0c\u65b9\u5f0f<\/p>\n<p>\u4e00\u79cd\u5e38\u89c1\u7684\u54c8\u5e0c\u65b9\u5f0f\u662f\u6309\u7167\u6570\u636e\u5c5e\u4e8e\u7684\u7528\u6237id\u8ba1\u7b97\u54c8\u5e0c\u3002<\/p>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p1.pstatp.com\/large\/pgc-image\/15399325766149eb5ae5fbc\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<p>\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>\u6563\u5217\u6027\uff1a\u597d<\/li>\n<li>\u5143\u4fe1\u606f\uff1a\u53ea\u9700\u8981\u51fd\u6570+\u670d\u52a1\u5668\u603b\u91cf<\/li>\n<\/ul>\n<p>\u7f3a\u70b9\uff1a<\/p>\n<ul>\n<li>\u53ef\u6269\u5c55\u6027\uff1a\u5dee\u3002\u4e00\u65e6\u96c6\u7fa4\u89c4\u6a21\u6269\u5c55\uff0c\u5927\u591a\u6570\u6570\u636e\u90fd\u9700\u8981\u88ab\u8fc1\u79fb\u5e76\u91cd\u65b0\u5206\u5e03<\/li>\n<li>\u6570\u636e\u503e\u659c\uff1a\u5f53\u67d0\u4e2a\u7528\u6237id\u7684\u6570\u636e\u91cf\u5f02\u5e38\u5e9e\u5927\u65f6\uff0c\u5bb9\u6613\u8fbe\u5230\u5355\u53f0\u670d\u52a1\u5668\u5904\u7406\u80fd\u529b\u7684\u4e0a\u9650<\/li>\n<\/ul>\n<p>2.1.2 \u6309\u6570\u636e\u8303\u56f4\u5206\u5e03<\/p>\n<p>\u5c06\u6570\u636e\u6309\u7279\u5f81\u503c\u7684\u503c\u57df\u8303\u56f4\u5212\u5206\u6570\u636e\u3002\u4f8b\u5982\u5c06\u7528\u6237id\u7684\u503c\u57df\u5206\u4e3a[1, 33), [33, 90), [90, 100)\uff0c\u7531\u4e09\u53f0\u670d\u52a1\u5668\u5904\u7406\u3002\u6ce8\u610f\u533a\u95f4\u5927\u5c0f\u4e0e\u533a\u95f4\u5185\u7684\u6570\u636e\u5927\u5c0f\u6ca1\u6709\u5173\u7cfb\u3002<\/p>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p98.pstatp.com\/large\/pgc-image\/1539932576648afa5845519\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<p>\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>\u53ef\u6269\u5c55\u6027\uff1a\u597d\u3002\u7075\u6d3b\u6839\u636e\u6570\u636e\u91cf\u62c6\u5206\u539f\u6709\u6570\u636e\u533a\u95f4<\/li>\n<\/ul>\n<p>\u7f3a\u70b9\uff1a<\/p>\n<ul>\n<li>\u5143\u4fe1\u606f\uff1a\u5927\u3002\u5bb9\u6613\u6210\u4e3a\u74f6\u9888\u3002<\/li>\n<\/ul>\n<p>2.1.3 \u6309\u6570\u636e\u91cf\u5206\u5e03<\/p>\n<p>\u4e0e\u6309\u8303\u56f4\u5206\u5e03\u6570\u636e\u65b9\u5f0f\u7c7b\u4f3c\uff0c\u5143\u4fe1\u606f\u5bb9\u6613\u6210\u4e3a\u74f6\u9888<\/p>\n<p>2.1.4 \u4e00\u81f4\u6027\u54c8\u5e0c<\/p>\n<p>(1) \u4ee5\u673a\u5668\u4e3a\u8282\u70b9<\/p>\n<p>\u7528\u4e00\u4e2ahash\u51fd\u6570\u8ba1\u7b97\u6570\u636e\uff08\u7279\u5f81\uff09\u7684hash\u503c\uff0c\u4ee4\u8be5hash\u51fd\u6570\u7684\u503c\u57df\u6210\u4e3a\u4e00\u4e2a\u5c01\u95ed\u7684\u73af\uff0c\u5c06\u8282\u70b9\u968f\u673a\u5206\u5e03\u5728\u73af\u4e0a\u3002\u6bcf\u4e2a\u8282\u70b9\u8d1f\u8d23\u5904\u7406\u4ece\u81ea\u5df1\u5f00\u59cb\u987a\u65f6\u9488\u5230\u4e0b\u4e00\u8282\u70b9\u7684\u503c\u57df\u4e0a\u7684\u6570\u636e\u3002<\/p>\n<p>\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>\u53ef\u6269\u5c55\u6027\uff1a\u6781\u597d\u3002\u4efb\u610f\u52a8\u6001\u6dfb\u52a0\u3001\u5220\u9664\u8282\u70b9\uff0c\u53ea\u5f71\u54cd\u76f8\u90bb\u8282\u70b9<\/li>\n<\/ul>\n<p>\u7f3a\u70b9\uff1a<\/p>\n<ul>\n<li>\u5143\u4fe1\u606f\uff1a\u5927\u800c\u4e14\u590d\u6742<\/li>\n<li>\u968f\u673a\u5206\u5e03\u8282\u70b9\u5bb9\u6613\u9020\u6210\u4e0d\u5747\u5300<\/li>\n<li>\u52a8\u6001\u589e\u52a0\u8282\u70b9\u540e\u53ea\u80fd\u7f13\u89e3\u76f8\u90bb\u8282\u70b9<\/li>\n<li>\u4e00\u4e2a\u63a5\u70b9\u5f02\u5e38\u65f6\u538b\u529b\u5168\u8f6c\u79fb\u5230\u76f8\u90bb\u8282\u70b9<\/li>\n<\/ul>\n<p>(2) \u865a\u8282\u70b9<\/p>\n<p>\u865a\u8282\u70b9\uff0c\u865a\u8282\u70b9\u4e2a\u6570\u8fdc\u5927\u4e8e\u673a\u5668\u4e2a\u6570\uff0c\u5c06\u865a\u8282\u70b9\u5747\u5300\u5206\u5e03\u5230\u503c\u57df\u73af\u4e0a\uff0c\u901a\u8fc7\u5143\u6570\u636e\u627e\u5230\u771f\u5b9e\u673a\u5668\u8282\u70b9\u3002<\/p>\n<p>\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>\u67d0\u4e00\u4e2a\u8282\u70b9\u4e0d\u53ef\u7528\u5bfc\u81f4\u591a\u4e2a\u865a\u8282\u70b9\u4e0d\u53ef\u7528\uff0c\u5747\u8861\u4e86\u538b\u529b<\/li>\n<li>\u52a0\u5165\u65b0\u8282\u70b9\u5bfc\u81f4\u589e\u52a0\u591a\u4e2a\u865a\u8282\u70b9\uff0c\u7f13\u89e3\u4e86\u5168\u5c40\u538b\u529b<\/li>\n<\/ul>\n<p>2.1.5 \u526f\u672c\u4e0e\u6570\u636e\u5206\u5e03<\/p>\n<p>\u524d\u8fb94\u4e2d\u6570\u636e\u5206\u5e03\u65b9\u5f0f\u7684\u8ba8\u8bba\u4e2d\u6ca1\u6709\u8003\u8651\u6570\u636e\u526f\u672c\u7684\u95ee\u9898\u3002<\/p>\n<p>(1) \u4ee5\u673a\u5668\u4e3a\u5355\u4f4d\u7684\u526f\u672c<\/p>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p99.pstatp.com\/large\/pgc-image\/1539932576631fdee48fd8f\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<p>\u7f3a\u70b9\uff1a<\/p>\n<ul>\n<li>\u6062\u590d\u6548\u7387\uff1a\u4f4e\u3002\u5047\u59821\u51fa\u95ee\u9898\uff0c\u4ece2 3 \u4e2d\u5168\u76d8\u62f7\u8d1d\u6570\u636e\u8f83\u6d88\u8017\u8d44\u6e90\uff0c\u4e3a\u907f\u514d\u5f71\u54cd\u670d\u52a1\u4e00\u822c\u4f1a\u5c062\u4e0b\u7ebf\u4e13\u95e8\u505a\u62f7\u8d1d\uff0c\u5bfc\u81f4\u6b63\u5e38\u5de5\u4f5c\u7684\u526f\u672c\u53ea\u67093<\/li>\n<li>\u53ef\u6269\u5c55\u6027\uff1a\u5dee\u3002\u5047\u5982\u7cfb\u7edf3\u53f0\u673a\u5668\u4e92\u4e3a\u526f\u672c\uff0c\u53ea\u589e\u52a0\u4e24\u53f0\u673a\u5668\u7684\u60c5\u51b5\u4e0b\u65e0\u6cd5\u7ec4\u6210\u65b0\u7684\u526f\u672c\u7ec4\u3002<\/li>\n<li>\u53ef\u7528\u6027\uff1a\u5dee\u3002\u4e00\u53f0donw\u673a\uff0c\u5269\u4e0b\u4e24\u53f0\u538b\u529b\u589e\u52a050%\u3002\u7406\u60f3\u60c5\u51b5\u4f1a\u5747\u644a\u5230\u6574\u4e2a\u96c6\u7fa4\uff0c\u800c\u4e0d\u662f\u5355\u4e2a\u526f\u672c\u7ec4<\/li>\n<\/ul>\n<p>(2) \u4ee5\u6570\u636e\u6bb5\u4e3a\u5355\u4f4d\u7684\u526f\u672c<\/p>\n<p>\u4f8b\u59823\u53f0\u670d\u52a1\u5668\uff0c10G\u6570\u636e\uff0c\u6309100hash\u53d6\u6a21\u5f97\u5230100M\u6bcf\u4e2a\u7684\u6570\u636e\u6bb5\uff0c\u6bcf\u53f0\u670d\u52a1\u5668\u8d1f\u8d23333\u4e2a\u6570\u636e\u6bb5\u3002\u4e00\u65e6\u5c06\u6570\u636e\u5206\u6210\u6570\u636e\u6bb5\uff0c\u5c31\u53ef\u4ee5\u4ee5\u6570\u636e\u6bb5\u4e3a\u5355\u4f4d\u7ba1\u7406\u526f\u672c\uff0c\u526f\u672c\u4e0e\u673a\u5668\u4e0d\u518d\u786c\u76f8\u5173\u3002<\/p>\n<p>\u4f8b\u5982\u7cfb\u7edf\u4e2d3\u4e2a\u6570\u636eo p q, \u6bcf\u4e2a\u6570\u636e\u6bb5\u6709\u4e09\u4e2a\u526f\u672c\uff0c\u7cfb\u7edf\u4e2d\u67094\u53f0\u673a\u5668\uff1a<\/p>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p3.pstatp.com\/large\/pgc-image\/1539932576625b87cf05313\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<p>\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>\u6062\u590d\u6548\u7387\uff1a\u9ad8\u3002\u53ef\u4ee5\u6574\u4e2a\u96c6\u7fa4\u540c\u65f6\u62f7\u8d1d<\/li>\n<li>\u53ef\u7528\u6027\uff1a\u597d\u3002\u673a\u5668donw\u673a\u7684\u538b\u529b\u5206\u6563\u5230\u6574\u4e2a\u96c6\u7fa4<\/li>\n<\/ul>\n<p>\u5de5\u7a0b\u4e2d\u5b8c\u5168\u6309\u7167\u6570\u636e\u6bb5\u5efa\u7acb\u526f\u672c\u4f1a\u5f15\u8d77\u5143\u6570\u636e\u5f00\u9500\u589e\u5927\uff0c\u8fd9\u79cd\u505a\u6cd5\u662f\u5c06\u6570\u636e\u6bb5\u7ec4\u6210\u4e00\u4e2a\u5927\u6570\u636e\u6bb5\u3002<\/p>\n<p>2.1.6 \u672c\u5730\u5316\u8ba1\u7b97<\/p>\n<p>\u5982\u679c\u8ba1\u7b97\u8282\u70b9\u548c\u5b58\u50a8\u8282\u70b9\u4f4d\u4e8e\u4e0d\u540c\u7684\u7269\u7406\u673a\u5668\uff0c\u5f00\u9500\u5f88\u5927\uff0c\u7f51\u7edc\u5e26\u5bbd\u4f1a\u6210\u4e3a\u7cfb\u7edf\u7684\u74f6\u9888\uff1b\u5c06\u8ba1\u7b97\u8c03\u5ea6\u5230\u4e0e\u5b58\u50a8\u8282\u70b9\u5728\u540c\u4e00\u53f0\u7269\u7406\u673a\u5668\u4e0a\u7684\u8282\u70b9\u8ba1\u7b97\uff0c\u79f0\u4e3a\u8ba1\u7b97\u672c\u5730\u5316\u3002<\/p>\n<p>2.2 \u57fa\u672c\u526f\u672c\u534f\u8bae<\/p>\n<p>2.2.1 \u4e2d\u5fc3\u5316\u526f\u672c\u63a7\u5236\u534f\u8bae<\/p>\n<ul>\n<li>\u4e2d\u5fc3\u5316\u526f\u672c\u63a7\u5236\u534f\u8bae\u7684\u57fa\u672c\u601d\u8def\uff1a\u7531\u4e00\u4e2a\u4e2d\u5fc3\u8282\u70b9\u534f\u8c03\u526f\u672c\u6570\u636e\u7684\u66f4\u65b0\u3001\u7ef4\u62a4\u526f\u672c\u4e4b\u95f4\u4e00\u81f4\u6027\uff0c\u5e76\u53d1\u63a7\u5236<\/li>\n<li>\u5e76\u53d1\u63a7\u5236\uff1a\u591a\u4e2a\u8282\u70b9\u540c\u65f6\u9700\u8981\u4fee\u6539\u526f\u672c\u6570\u636e\u65f6\uff0c\u9700\u8981\u89e3\u51b3\u7684\u201c\u5199\u5199\u201d\u3001\u201c\u8bfb\u5199\u201d\u7b49\u5e76\u53d1\u51b2\u7a81<\/li>\n<\/ul>\n<p>\u5355\u673a\u7cfb\u7edf\u4f7f\u7528\u52a0\u9501\u7b49\u65b9\u5f0f\u8fdb\u884c\u5e76\u53d1\u63a7\u5236\uff0c\u4e2d\u5fc3\u5316\u534f\u8bae\u4e5f\u53ef\u4ee5\u4f7f\u7528\u3002\u7f3a\u70b9\u662f\u8fc7\u5206\u4f9d\u8d56\u4e2d\u5fc3\u8282\u70b9\u3002<\/p>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p3.pstatp.com\/large\/pgc-image\/1539932576720e6d93c0eab\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<p>2.2.2 primary-secondary\u534f\u8bae<\/p>\n<p>\u8fd9\u662f\u4e00\u79cd\u5e38\u7528\u7684\u4e2d\u5fc3\u5316\u526f\u672c\u63a7\u5236\u534f\u8bae\uff0c\u6709\u4e14\u4ec5\u6709\u4e00\u4e2a\u8282\u70b9\u4f5c\u4e3aprimary\u526f\u672c\u3002\u67094\u4e2a\u95ee\u9898\u9700\u8981\u89e3\u51b3\uff1a<\/p>\n<p>(1) \u6570\u636e\u66f4\u65b0\u57fa\u672c\u6d41\u7a0b<\/p>\n<ul>\n<li>\u7531primary\u534f\u8c03\u5b8c\u6210\u66f4\u65b0<\/li>\n<li>\u5916\u90e8\u8282\u70b9\u5c06\u66f4\u65b0\u64cd\u4f5c\u53d1\u7ed9primary\u8282\u70b9<\/li>\n<li>primary\u8282\u70b9\u8fdb\u884c\u5e76\u53d1\u63a7\u5236\u5e76\u786e\u5b9a\u5e76\u53d1\u66f4\u65b0\u64cd\u4f5c\u7684\u5148\u540e\u987a\u5e8f<\/li>\n<li>primary\u8282\u70b9\u5c06\u66f4\u65b0\u64cd\u4f5c\u53d1\u9001\u7ed9secondary\u8282\u70b9<\/li>\n<li>primary\u6839\u636esecondary\u8282\u70b9\u7684\u5b8c\u6210\u60c5\u51b5\u51b3\u5b9a\u66f4\u65b0\u662f\u5426\u6210\u529f\uff0c\u7136\u540e\u5c06\u7ed3\u679c\u8fd4\u56de\u5916\u90e8\u8282\u70b9<\/li>\n<\/ul>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p1.pstatp.com\/large\/pgc-image\/15399325770968e27503fbd\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<p>\u5176\u4e2d\u7b2c4\u6b65\uff0c\u6709\u4e9b\u7cfb\u7edf\u5982GFS\u4f7f\u7528\u63a5\u529b\u7684\u65b9\u5f0f\u540c\u6b65\u6570\u636e\uff0cprimary -&gt; secondary1 -&gt;secondary2\uff0c\u907f\u514dprimary\u7684\u5e26\u5bbd\u79f0\u4e3a\u74f6\u9888\u3002<\/p>\n<p>(2) \u6570\u636e\u8bfb\u53d6\u65b9\u5f0f<\/p>\n<ul>\n<li>\u65b9\u6cd5\u4e00\uff1a\u7531\u4e8e\u6570\u636e\u66f4\u65b0\u6d41\u7a0b\u90fd\u662f\u7531primary\u63a7\u5236\u7684\uff0cprimary\u526f\u672c\u4e0a\u6570\u636e\u4e00\u5b9a\u6700\u65b0\u3002\u6240\u4ee5\u6c38\u8fdc\u53ea\u8bfbprimary\u526f\u672c\u7684\u6570\u636e\u80fd\u591f\u5b9e\u73b0\u5f3a\u4e00\u81f4\u6027\u3002\u4e3a\u4e86\u907f\u514d\u673a\u5668\u6d6a\u8d39\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e4b\u524d\u8ba8\u8bba\u7684\u65b9\u6cd5\uff0c\u5c06\u6570\u636e\u5206\u6bb5\uff0c\u5c06\u6570\u636e\u6bb5\u4f5c\u4e3a\u526f\u672c\u5355\u4f4d\u3002\u8fbe\u5230\u6bcf\u53f0\u673a\u5668\u90fd\u6709primary\u526f\u672c\u7684\u76ee\u7684\u3002<\/li>\n<li>\u65b9\u6cd5\u4e8c\uff1a\u7531primary\u63a7\u5236secondary\u7684\u53ef\u7528\u6027\u3002\u5f53primary\u66f4\u65b0\u67d0\u4e2asecondary\u4e0d\u6210\u529f\u65f6\uff0c\u5c06\u5176\u6807\u8bb0\u4e3a\u4e0d\u53ef\u7528\u3002\u4e0d\u53ef\u7528\u7684secondary\u526f\u672c\u7ee7\u7eed\u5c1d\u8bd5\u4e0eprimary\u540c\u6b65\u6570\u636e\uff0c\u76f4\u5230\u6210\u529f\u540c\u6b65\u540e\u8f6c\u4e3a\u53ef\u7528\u72b6\u6001\u3002<\/li>\n<li>\u65b9\u6cd5\u4e09\uff1aQuorum\u673a\u5236\u3002\u540e\u7eed\u8ba8\u8bba\u3002<\/li>\n<\/ul>\n<p>(3) primary\u526f\u672c\u7684\u786e\u5b9a\u4e0e\u5207\u6362<\/p>\n<ul>\n<li>\u5982\u4f55\u786e\u5b9aprimary\u526f\u672c\uff1fprimary\u526f\u672c\u6240\u5728\u673a\u5668\u5f02\u5e38\u65f6\uff0c\u5982\u4f55\u5207\u6362\u526f\u672c\uff1f<\/li>\n<li>\u901a\u5e38\u5728primary-secondary\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u54ea\u4e2a\u526f\u672c\u4e3aprimary\u8fd9\u4e00\u4fe1\u606f\u5c5e\u4e8e\u5143\u4fe1\u606f\uff0c\u7531\u4e13\u95e8\u5143\u6570\u636e\u670d\u52a1\u5668\u7ef4\u62a4\u3002\u6267\u884c\u66f4\u65b0\u64cd\u4f5c\u65f6\uff0c\u9996\u5148\u67e5\u8be2\u5143\u6570\u636e\u670d\u52a1\u5668\u83b7\u53d6\u526f\u672c\u7684primary\u4fe1\u606f\uff0c\u8fdb\u4e00\u6b65\u6267\u884c\u6570\u636e\u66f4\u65b0\u6d41\u7a0b\u3002<\/li>\n<li>\u5207\u6362\u526f\u672c\u96be\u70b9\u6709\u4e24\u4e2a\u65b9\u9762\uff1a\u5982\u4f55\u786e\u5b9a\u8282\u70b9\u72b6\u6001\u4ee5\u53d1\u73b0\u539fprimary\u8282\u70b9\u51fa\u73b0\u5f02\u5e38(Lease\u673a\u5236)\u3002\u5207\u6362primary\u540e\u4e0d\u80fd\u5f71\u54cd\u4e00\u81f4\u6027(Quorum\u673a\u5236)\u3002<\/li>\n<\/ul>\n<p>(4) \u6570\u636e\u540c\u6b65<\/p>\n<p>\u5f53\u53d1\u751fsecondary\u4e0eprimary\u4e0d\u4e00\u81f4\u7684\u60c5\u51b5\uff0c\u9700\u8981secondary\u5411primary\u8fdb\u884c\u540c\u6b65(reconcile)\u3002<\/p>\n<p>\u4e0d\u4e00\u81f4\u7684\u539f\u56e0\u67093\u79cd\uff1a<\/p>\n<ul>\n<li>\u7f51\u7edc\u5206\u5316\u7b49\u5f02\u5e38\u5bfc\u81f4secondary\u843d\u540e\u4e8eprimary<\/li>\n<li>\u5e38\u7528\u7684\u65b9\u5f0f\u662f\u56de\u653eprimary\u4e0a\u7684\u64cd\u4f5c\u65e5\u5fd7(redo\u65e5\u5fd7)\uff0c\u8ffd\u4e0aprimary\u7684\u66f4\u65b0\u8fdb\u5ea6<\/li>\n<li>\u67d0\u4e9b\u534f\u8bae\u4e0bsecondary\u662f\u810f\u6570\u636e<\/li>\n<li>\u4e22\u5f03\u8f6c\u5230\u7b2c\u4e09\u79cd\u60c5\u51b5\uff1b\u6216\u8005\u8bbe\u8ba1\u57fa\u4e8eundo\u65e5\u5fd7\u7684\u65b9\u5f0f<\/li>\n<li>secondary\u662f\u4e00\u4e2a\u65b0\u589e\u526f\u672c\u5b8c\u5168\u6ca1\u6709\u6570\u636e<\/li>\n<li>\u76f4\u63a5copy primary\u7684\u6570\u636e\uff0c\u4f46\u8981\u6c42\u540c\u65f6primary\u80fd\u7ee7\u7eed\u63d0\u4f9b\u66f4\u65b0\u670d\u52a1\uff0c\u8fd9\u5c31\u8981\u6c42primary\u526f\u672c\u652f\u6301\u5feb\u7167(snapshot)\u529f\u80fd\u3002\u5373\u5bf9\u67d0\u4e00\u523b\u7684\u526f\u672c\u6570\u636e\u5f62\u6210\u5feb\u7167\uff0c\u7136\u540ecopy\u5feb\u7167\uff0c\u518d\u4f7f\u7528\u56de\u653e\u65e5\u5fd7\u7684\u65b9\u5f0f\u8ffd\u8d76\u5feb\u7167\u540e\u7684\u66f4\u65b0\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<p>2.2.3 \u53bb\u4e2d\u5fc3\u5316\u526f\u672c\u63a7\u5236\u534f\u8bae<\/p>\n<p>\u53bb\u4e2d\u5fc3\u5316\u526f\u672c\u63a7\u5236\u534f\u8bae\u6ca1\u6709\u4e2d\u5fc3\u8282\u70b9\uff0c\u8282\u70b9\u4e4b\u95f4\u901a\u8fc7\u5e73\u7b49\u534f\u5546\u8fbe\u5230\u4e00\u81f4\u3002\u5de5\u7a0b\u4e2d\u552f\u4e00\u80fd\u5e94\u7528\u5728\u5f3a\u4e00\u81f4\u6027\u8981\u6c42\u4e0b\u7684\u662fpaxos\u534f\u8bae\u3002\u540e\u7eed\u4ecb\u7ecd\u3002<\/p>\n<p>2.3 lease\u673a\u5236<\/p>\n<p>2.3.1 \u57fa\u4e8elease\u7684\u5206\u5e03\u5f0fcache\u7cfb\u7edf<\/p>\n<p>(1) \u9700\u6c42\uff1a\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u6709\u4e00\u4e2a\u8282\u70b9A\u5b58\u50a8\u7ef4\u62a4\u7cfb\u7edf\u7684\u5143\u6570\u636e\uff0c\u7cfb\u7edf\u4e2d\u5176\u4ed6\u8282\u70b9\u901a\u8fc7\u8bbf\u95eeA\u8bfb\u53d6\u4fee\u6539\u5143\u6570\u636e\uff0c\u5bfc\u81f4A\u7684\u6027\u80fd\u6210\u4e3a\u7cfb\u7edf\u74f6\u9888\u3002\u4e3a\u6b64\uff0c\u8bbe\u8ba1\u4e00\u79cd\u5143\u6570\u636ecache\uff0c\u5728\u5404\u4e2a\u8282\u70b9\u4e0acache\u5143\u6570\u636e\u4fe1\u606f\uff0c\u4f7f\u5f97\uff1a<\/p>\n<ul>\n<li>\u51cf\u5c11\u5bf9A\u7684\u8bbf\u95ee\uff0c\u63d0\u9ad8\u6027\u80fd<\/li>\n<li>\u5404\u4e2a\u8282\u70b9cache\u6570\u636e\u59cb\u7ec8\u4e0eA\u4e00\u81f4<\/li>\n<li>\u6700\u5927\u53ef\u80fd\u5904\u7406\u8282\u70b9down\u673a\u3001\u7f51\u7edc\u4e2d\u65ad\u7b49\u5f02\u5e38<\/li>\n<\/ul>\n<p>(2) \u89e3\u51b3\u65b9\u6848\u539f\u7406\uff1a<\/p>\n<ul>\n<li>A\u5411\u5404\u4e2a\u8282\u70b9\u53d1\u9001\u6570\u636e\u7684\u540c\u65f6\u5411\u8282\u70b9\u9881\u53d1\u4e00\u4e2alease\uff0c\u6bcf\u4e2alease\u5177\u6709\u4e00\u4e2a\u6709\u6548\u671f\uff0c\u901a\u5e38\u662f\u4e00\u4e2a\u660e\u786e\u7684\u65f6\u95f4\u70b9\u3002\u4e00\u65e6\u771f\u5b9e\u65f6\u95f4\u8d85\u8fc7\u6b21\u65f6\u95f4\u70b9\u5219lease\u8fc7\u671f<\/li>\n<li>\u5728lease\u6709\u6548\u671f\u5185\uff0cA\u4fdd\u8bc1\u4e0d\u4f1a\u4fee\u6539\u5bf9\u5e94\u6570\u636e\u7684\u503c\u3002<\/li>\n<li>A\u5728\u4fee\u6539\u6570\u636e\u65f6\uff0c\u9996\u5148\u963b\u585e\u6240\u6709\u65b0\u7684\u8bfb\u8bf7\u6c42\uff0c\u7b49\u5f85\u4e4b\u524d\u4e3a\u8be5\u6570\u636e\u53d1\u51fa\u7684\u6240\u6709lease\u8fc7\u671f\uff0c\u7136\u540e\u4fee\u6539\u6570\u636e\u7684\u503c<\/li>\n<\/ul>\n<p>(3) \u5ba2\u6237\u7aef\u8282\u70b9\u8bfb\u53d6\u5143\u6570\u636e\u7684\u6d41\u7a0b<\/p>\n<pre>if (\u5143\u6570\u636e\u5904\u4e8e\u672c\u5730cache &amp;&amp; lease\u5904\u4e8e\u6709\u6548\u671f\u5185) {\r\n \u76f4\u63a5\u8fd4\u56decache\u4e2d\u7684\u5143\u6570\u636e;\r\n} else {\r\n Result = \u5411A\u8bf7\u6c42\u8bfb\u53d6\u5143\u6570\u636e\u4fe1\u606f;\r\n if (Result.Status == SUCCESS) {\r\n WriteToCache(Result.data, Result.lease);\r\n } else if (Result.Status == FAIL || Result.Status == TIMEOUT) {\r\n retry() or exit();\r\n }\r\n}<\/pre>\n<p>(4) \u5ba2\u6237\u7aef\u8282\u70b9\u4fee\u6539\u5143\u6570\u636e\u7684\u6d41\u7a0b<\/p>\n<ul>\n<li>\u8282\u70b9\u5411A\u53d1\u8d77\u4fee\u6539\u5143\u6570\u636e\u7684\u8bf7\u6c42<\/li>\n<li>A\u6536\u5230\u4fee\u6539\u8bf7\u6c42\u540e\u963b\u585e\u6240\u6709\u65b0\u7684\u8bfb\u6570\u636e\u8bf7\u6c42\uff0c\u5373\u63a5\u53d7\u8bfb\u8bf7\u6c42\u4f46\u4e0d\u8fd4\u56de\u6570\u636e<\/li>\n<li>A\u7b49\u5f85\u6240\u6709\u4e0e\u8be5\u5143\u6570\u636e\u76f8\u5173\u7684lease\u8d85\u65f6<\/li>\n<li>A\u4fee\u6539\u5143\u6570\u636e\u5e76\u5411\u8282\u70b9\u8fd4\u56de\u4fee\u6539\u6210\u529f<\/li>\n<\/ul>\n<p>(5) \u4f18\u5316\u70b9<\/p>\n<ul>\n<li>A\u4fee\u6539\u5143\u6570\u636e\u65f6\u8981\u963b\u585e\u6240\u6709\u65b0\u7684\u8bfb\u8bf7\u6c42<\/li>\n<li>\u8fd9\u662f\u4e3a\u4e86\u9632\u6b62\u53d1\u51fa\u65b0\u7684lease\u800c\u5f15\u8d77\u4e0d\u65ad\u6709\u65b0\u7684cache\u8282\u70b9\u6301\u6709lease\uff0c\u5f62\u6210\u6d3b\u9501\u3002\u4f18\u5316\u7684\u624b\u6bb5\u662f\uff1a\u4e00\u65e6A\u8fdb\u5165\u4fee\u6539\u6d41\u7a0b\uff0c\u4e0d\u662f\u76f2\u76ee\u5c4f\u853d\u8bfb\u8bf7\u6c42\uff0c\u800c\u662f\u5bf9\u8bfb\u8bf7\u6c42\u53ea\u8fd4\u56de\u6570\u636e\u4e0d\u8fd4\u56delease\u3002\u9020\u6210cache\u8282\u70b9\u53ea\u80fd\u8bfb\u53d6\u6570\u636e\uff0c\u4e0d\u80fdcache\u6570\u636e\u3002\u8fdb\u4e00\u6b65\u7684\u4f18\u5316\u662f\u8fd4\u56de\u5f53\u524d\u5df2\u53d1\u51fa\u7684lease\u7684\u6700\u5927\u503c\u3002\u8fd9\u6837\u540c\u6837\u80fd\u907f\u514d\u6d3b\u9501\u95ee\u9898\u3002<\/li>\n<li>A\u5728\u4fee\u6539\u5143\u6570\u636e\u65f6\u9700\u8981\u7b49\u5f85\u6240\u6709lease\u8fc7\u671f<\/li>\n<li>\u4f18\u5316\u624b\u6bb5\u662f\uff1aA\u4e3b\u52a8\u901a\u77e5\u5404\u4e2a\u6301\u6709lease\u7684\u8282\u70b9\uff0c\u653e\u5f03lease\u5e76\u6e05\u9664cache\u4e2d\u76f8\u5173\u6570\u636e\u3002\u5982\u679c\u6536\u5230cache\u8282\u70b9\u7684reply\uff0c\u786e\u8ba4\u534f\u5546\u901a\u8fc7\uff0c\u5219\u53ef\u4ee5\u63d0\u524d\u5b8c\u6210\u4fee\u6539\u52a8\u4f5c\uff1b\u5982\u679c\u4e2d\u95f4\u5931\u8d25\u6216\u8d85\u65f6\uff0c\u5219\u8fdb\u5165\u6b63\u5e38\u7b49\u5f85lease\u8fc7\u671f\u7684\u6d41\u7a0b\uff0c\u4e0d\u4f1a\u5f71\u54cd\u534f\u8bae\u6b63\u786e\u6027\u3002<\/li>\n<\/ul>\n<p>2.3.2 lease\u673a\u5236\u7684\u6df1\u5165\u5206\u6790<\/p>\n<p>(1) lease\u5b9a\u4e49<\/p>\n<p>lease\u662f\u7531\u9881\u53d1\u8005\u6388\u4e88\u7684\u518d\u67d0\u4e00\u6709\u6548\u671f\u5185\u7684\u627f\u8bfa\u3002\u9881\u53d1\u8005\u4e00\u65e6\u53d1\u51falease\uff0c\u65e0\u8bba\u63a5\u6536\u65b9\u662f\u5426\u6536\u5230\uff0c\u65e0\u8bba\u540e\u7eed\u63a5\u6536\u65b9\u5904\u4e8e\u4f55\u79cd\u72b6\u6001\uff0c\u53ea\u8981lease\u4e0d\u8fc7\u671f\u5219\u9881\u53d1\u8005\u4e00\u5b9a\u4e25\u5b88\u627f\u8bfa\uff1b\u53e6\u4e00\u65b9\u9762\uff0c\u63a5\u53d7\u8005\u5728lease\u7684\u6709\u6548\u671f\u5185\u53ef\u4ee5\u4f7f\u7528\u9881\u53d1\u8005\u7684\u627f\u8bfa\uff0c\u4e00\u65e6lease\u8fc7\u671f\u5219\u4e00\u5b9a\u4e0d\u80fd\u7ee7\u7eed\u4f7f\u7528\u3002<\/p>\n<p>(2) lease\u7684\u89e3\u8bfb<\/p>\n<p>\u7531\u4e8elease\u4ec5\u4ec5\u662f\u4e00\u79cd\u627f\u8bfa\uff0c\u5177\u4f53\u7684\u627f\u8bfa\u5185\u5bb9\u53ef\u4ee5\u975e\u5e38\u5bbd\u6cdb\uff0c\u53ef\u4ee5\u662f\u4e0a\u8282\u4e2d\u6570\u636e\u7684\u6b63\u786e\u6027\uff0c\u4e5f\u53ef\u4ee5\u662f\u67d0\u79cd\u6743\u9650\u3002\u4f8b\u5982\u5e76\u53d1\u63a7\u5236\u4e2d\u540c\u4e00\u65f6\u523b\u53ea\u7ed9\u67d0\u4e00\u4e2a\u8282\u70b9\u9881\u53d1lease\uff0c\u53ea\u6709\u6301\u6709lease\u624d\u80fd\u4fee\u6539\u6570\u636e\uff1b\u4f8b\u5982primary-secondary\u4e2d\u6301\u6709lease\u7684\u8282\u70b9\u5177\u6709primary\u8eab\u4efd\u7b49\u7b49<\/p>\n<p>(3) lease\u7684\u9ad8\u53ef\u7528\u6027<\/p>\n<ul>\n<li>\u6709\u6548\u671f\u7684\u5f15\u5165\uff0c\u975e\u5e38\u597d\u7684\u89e3\u51b3\u4e86\u7f51\u7edc\u5f02\u5e38\u95ee\u9898\u3002\u7531\u4e8elease\u662f\u786e\u5b9a\u7684\u65f6\u95f4\u70b9\uff0c\u6240\u4ee5\u53ef\u4ee5\u7b80\u5355\u91cd\u53d1\uff1b\u4e00\u65e6\u53d7\u5230lease\u4e4b\u540e\uff0c\u5c31\u4e0d\u518d\u4f9d\u8d56\u7f51\u7edc\u901a\u4fe1<\/li>\n<\/ul>\n<p>(4) lease\u7684\u65f6\u949f\u540c\u6b65<\/p>\n<p>\u5de5\u7a0b\u4e0a\u5c06\u9881\u53d1\u8005\u6709\u6548\u671f\u8bbe\u7f6e\u7684\u6bd4\u63a5\u53d7\u8005\u6253\uff0c\u5927\u8fc7\u65f6\u949f\u8bef\u5dee\uff0c\u6765\u907f\u514d\u5bf9lease\u6709\u6548\u6027\u4ea7\u751f\u5f71\u54cd\u3002<\/p>\n<p>2.3.3 \u57fa\u4e8elease\u673a\u5236\u786e\u5b9a\u8282\u70b9\u72b6\u6001\u3002<\/p>\n<p>\u5728\u5206 \u5e03\u5f0f\u7cfb\u7edf\u4e2d\u786e\u5b9a\u4e00\u4e2a\u8282\u70b9\u662f\u5426\u5904\u4e8e\u6b63\u5e38\u5de5\u4f5c\u72b6\u6001\u56f0\u96be\u7684\u95ee\u9898\u3002\u7531\u53ef\u80fd\u5b58\u5728\u7f51\u7edc\u5206\u5316\uff0c\u8282\u70b9\u7684\u72b6\u6001\u65e0\u6cd5\u901a\u8fc7\u7f51\u7edc\u901a\u4fe1\u6765\u786e\u5b9a\u7684\u3002<\/p>\n<p>\u4f8b\u5982\uff1a a b c \u4e92\u4e3a\u526f\u672c a\u4e3a\u4e3b\u8282\u70b9\uff0cq\u4e3a\u76d1\u63a7\u8282\u70b9\u3002q\u901a\u8fc7ping\u6765\u5224\u65adabc\u7684\u72b6\u6001\uff0c\u8ba4\u4e3aa\u4e0d\u80fd\u5de5\u4f5c\u3002\u5c31\u5c06\u4e3b\u8282\u70b9\u5207\u6362\u6210b\u3002\u4f46\u662f\u4e8b\u5b9e\u4e0a\u4ec5\u4ec5\u662fping\u6ca1\u6536\u5230\uff0ca\u81ea\u5df1\u8ba4\u4e3a\u81ea\u5df1\u6ca1\u6709\u95ee\u9898\uff0c\u5c31\u51fa\u73b0\u4e86 a b\u90fd\u89c9\u5f97\u81ea\u5df1\u662f\u4e3b\u8282\u70b9\u7684\u201c\u53cc\u4e3b\u201d\u95ee\u9898\u3002<\/p>\n<p>\u89e3\u51b3\u65b9\u6cd5\u662fq\u5728\u53d1\u9001heartbeat\u65f6\u52a0\u4e0alease\uff0c\u8868\u793a\u786e\u8ba4\u4e86abc\u7684\u72b6\u6001\uff0c\u5e76\u5141\u8bb8\u8282\u70b9\u5728lease\u6709\u6548\u671f\u5185\u6b63\u5e38\u5de5\u4f5c\u3002q\u7ed9primary\u8282\u70b9\u4e00\u4e2a\u7279\u6b8a\u7684lease\uff0c\u8868\u793a\u8be5\u8282\u70b9\u4f5c\u4e3aprimary\u5de5\u4f5c\u3002\u4e00\u65e6q\u5e0c\u671b\u5207\u6362primary\uff0c\u53ea\u9700\u8981\u7b49\u5f85\u4e4b\u524dprimary\u7684lease\u8fc7\u671f\uff0c\u907f\u514d\u51fa\u73b0\u53cc\u4e3b\u95ee\u9898\u3002<\/p>\n<p>2.3.4 lease\u7684\u6709\u6548\u671f\u65f6\u95f4\u9009\u62e9<\/p>\n<p>\u5de5\u7a0b\u4e0a\u4e00\u822c\u9009\u62e910\u79d2\u949f<\/p>\n<p>2.4 Quorum\u673a\u5236<\/p>\n<p>2.4.1 Write-all-read-one<\/p>\n<p>\u5bf9\u4e8e\u67d0\u6b21\u66f4\u65b0\u64cd\u4f5cWi\uff0c\u53ea\u6709\u5728\u6240\u6709N\u4e2a\u526f\u672c\u4e0a\u90fd\u66f4\u65b0\u6210\u529f\uff0c\u624d\u8ba4\u4e3a\u662f\u4e00\u6b21\u201c\u6210\u529f\u63d0\u4ea4\u7684\u66f4\u65b0\u64cd\u4f5c\u201d\uff0c\u5bf9\u5e94\u7684\u6570\u636e\u4e3a\u201c\u6210\u529f\u63d0\u4ea4\u7684\u6570\u636e\u201d\uff0c\u6570\u636e\u7248\u672c\u4e3aVi\u3002<\/p>\n<p>\u7f3a\u70b9\uff1a<\/p>\n<ul>\n<li>\u9891\u7e41\u8bfb\u5199\u7248\u672c\u53f7\u5bb9\u6613\u6210\u4e3a\u74f6\u9888<\/li>\n<li>N-1\u4e2a\u526f\u672c\u6210\u529f\u7684\u60c5\u51b5\u4e0b\uff0c\u4ecd\u7136\u88ab\u8ba4\u4e3a\u66f4\u65b0\u5931\u8d25<\/li>\n<\/ul>\n<p>2.4.2 Quorum\u5b9a\u4e49<\/p>\n<p>WARO\u6700\u5927\u7a0b\u5ea6\u589e\u5f3a\u8bfb\u670d\u52a1\u53ef\u7528\u6027\uff0c\u6700\u5927\u7a0b\u5ea6\u727a\u7272\u5199\u670d\u52a1\u7684\u53ef\u7528\u6027\u3002\u5c06\u8bfb\u5199\u53ef\u7528\u6027\u6298\u4e2d\uff0c\u5c31\u4f1a\u5f97\u5230Quorum\u673a\u5236\uff1a<\/p>\n<p>Quorum\u673a\u5236\u4e0b\uff0c\u67d0\u6b21\u66f4\u65b0Wi\u4e00\u65e6\u5728\u6240\u6709N\u4e2a\u526f\u672c\u4e2d\u7684W\u4e2a\u526f\u672c\u4e0a\u6210\u529f\uff0c\u5c31\u79f0\u4e3a\u201c\u6210\u529f\u63d0\u4ea4\u7684\u66f4\u65b0\u64cd\u4f5c\u201d\uff0c\u5bf9\u5e94\u7684\u6570\u636e\u4e3a\u201c\u6210\u529f\u63d0\u4ea4\u7684\u6570\u636e\u201d\u3002\u4ee4R &gt; N &#8211; W\uff0c\u6700\u591a\u9700\u8981\u8bfb\u53d6R\u4e2a\u526f\u672c\u5219\u4e00\u5b9a\u80fd\u8bfb\u5230Wi\u66f4\u65b0\u540e\u7684\u6570\u636eVi\u3002<\/p>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p98.pstatp.com\/large\/pgc-image\/15399325767369b60070841\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<p>\u7531\u6b64\u53ef\u89c1WARO\u662fQuorum\u4e2dW = N\u65f6\u7684\u4e00\u4e2a\u7279\u4f8b\u3002<\/p>\n<p>2.4.3 \u8bfb\u53d6\u6700\u65b0\u6210\u529f\u63d0\u4ea4\u7684\u6570\u636e<\/p>\n<p>Quorum\u7684\u5b9a\u4e49\u57fa\u4e8e\u4e24\u4e2a\u5047\u8bbe\uff1a<\/p>\n<ul>\n<li>\u8bfb\u53d6\u8005\u77e5\u9053\u5f53\u524d\u5df2\u63d0\u4ea4\u7684\u7248\u672c\u53f7<\/li>\n<li>\u6bcf\u6b21\u90fd\u662f\u4e00\u6b21\u6210\u529f\u7684\u63d0\u4ea4<\/li>\n<\/ul>\n<p>\u73b0\u5728\u53d6\u6d88\u8fd9\u4e24\u4e2a\u5047\u8bbe\uff0c\u5206\u6790\u4e0b\u9762\u8fd9\u4e2a\u5b9e\u9645\u95ee\u9898\uff1a<\/p>\n<p>N = 5, W = 3, R = 3\uff0c\u67d0\u4e00\u6b21\u7684\u526f\u672c\u72b6\u6001\u4e3a(V2 V2 V2 V1 V1)\u3002\u7406\u8bba\u4e0a\u8bfb\u53d6\u4efb\u4f553\u4e2a\u526f\u672c\u4e00\u5b9a\u80fd\u8bfb\u5230\u6700\u65b0\u7684\u6570\u636eV2\uff0c\u4f46\u662f\u4ec5\u8bfb3\u4e2a\u526f\u672c\u5374\u65e0\u6cd5\u786e\u5b9a\u8bfb\u5230\u6700\u65b0\u7684\u6570\u636e\u3002<\/p>\n<p>\u4f8b\u5982\u8bfb\u5230\u7684\u662f(V2 V1 V1)\uff0c\u56e0\u4e3a\u5f53\u526f\u672c\u72b6\u6001\u4e3a(V2 V1 V1 V1 V1)\u65f6\u4e5f\u4f1a\u8bfb\u5230(V2 V1 V1)\uff0c\u800c\u6b64\u65f6V2\u7248\u672c\u7684\u6570\u636e\u662f\u4e00\u6b21\u5931\u8d25\u7684\u63d0\u4ea4\u3002\u56e0\u6b64\u53ea\u8bfb3\u4e2a\u65e0\u6cd5\u786e\u5b9a\u6700\u65b0\u6709\u6548\u7684\u7248\u672c\u662fV2\u8fd8\u662fV1\u3002<\/p>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p3.pstatp.com\/large\/pgc-image\/1539932576791bd5f93a04e\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<p>\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n<ul>\n<li>\u9650\u5236\u63d0\u4ea4\u7684\u66f4\u65b0\u64cd\u4f5c\u5fc5\u987b\u4e25\u683c\u9012\u589e\uff0c\u53ea\u6709\u524d\u4e00\u4e2a\u66f4\u65b0\u64cd\u4f5c\u6210\u529f\u540e\u624d\u53ef\u4ee5\u63d0\u4ea4\u4e0b\u4e00\u4e2a\u3002\u4fdd\u8bc1\u6210\u529f\u7684\u7248\u672c\u53f7\u8fde\u7eed<\/li>\n<li>\u8bfb\u53d6R\u4e2a\u526f\u672c\uff0c\u5bf9\u5176\u4e2d\u7248\u672c\u53f7\u6700\u9ad8\u7684\u6570\u636e\uff1a\u82e5\u5df2\u5b58\u5728W\u4e2a\uff0c\u5219\u8be5\u6570\u636e\u4e3a\u6700\u65b0\u7ed3\u679c\uff1b\u5426\u5219\u5047\u8bbe\u4e3aX\u4e2a\uff0c\u5219\u7ee7\u7eed\u8bfb\u53d6\u5176\u4ed6\u526f\u672c\u76f4\u5230\u6210\u529f\u8bfb\u53d6W\u4e2a\u8be5\u7248\u672c\u7684\u526f\u672c\u3002\u5982\u679c\u65e0\u6cd5\u627e\u5230W\u4e2a\uff0c\u5219\u7b2c\u4e8c\u5927\u7684\u7248\u672c\u53f7\u4e3a\u6700\u65b0\u6210\u529f\u63d0\u4ea4\u7684\u7248\u672c\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64\u5355\u7eaf\u4f7f\u7528Quorum\u673a\u5236\u65f6\uff0c\u6700\u591a\u9700\u8981\u8bfb\u53d6R + (W &#8211; R &#8211; 1) = N\u4e2a\u526f\u672c\u624d\u80fd\u786e\u5b9a\u6700\u65b0\u6210\u529f\u63d0\u4ea4\u7684\u7248\u672c\u3002\u5b9e\u9645\u5de5\u7a0b\u4e2d\u4e00\u822c\u4f7f\u7528quorum\u4e0eprimary-secondary\u7ed3\u5408\u7684\u624b\u6bb5\uff0c\u907f\u514d\u9700\u8981\u8bfb\u53d6N\u4e2a\u526f\u672c\u3002<\/p>\n<p>2.4.4 \u57fa\u4e8eQuorum\u673a\u5236\u9009\u62e9primary<\/p>\n<ul>\n<li>\u5728primary-secondary\u534f\u8bae\u4e2d\u5f15\u5165quorum\u673a\u5236\uff1a\u5373primary\u6210\u529f\u66f4\u65b0W\u4e2a\u526f\u672c\u540e\u5411\u7528\u6237\u8fd4\u56de\u6210\u529f<\/li>\n<li>\u5f53primary\u5f02\u5e38\u65f6\u9700\u8981\u9009\u62e9\u4e00\u4e2a\u65b0\u7684primary\uff0c\u4e4b\u540esecondary\u526f\u672c\u4e0eprimary\u540c\u6b65\u6570\u636e<\/li>\n<\/ul>\n<p>\u901a\u5e38\u60c5\u51b5\u4e0b\u5207\u6362primary\u7531\u76d1\u63a7\u8282\u70b9q\u5b8c\u6210\uff0c\u5f15\u5165quorum\u4e4b\u540e\uff0c\u9009\u62e9\u65b0\u7684primary\u7684\u65b9\u5f0f\u4e0e\u8bfb\u53d6\u6570\u636e\u76f8\u4f3c\uff0c\u5373q\u8bfb\u53d6R\u4e2a\u526f\u672c\uff0c\u9009\u62e9R\u4e2a\u526f\u672c\u4e2d\u7248\u672c\u53f7\u6700\u9ad8\u7684\u526f\u672c\u4f5c\u4e3a\u65b0\u7684primary\u3002\u65b0primary\u4e0e\u9664\u53bbq\u9009\u4e3e\u51fa\u7684\u526f\u672c\u5916\uff0c\u5176\u4f59\u7684\u81f3\u5c11W\u4e2a\u526f\u672c\u5b8c\u6210\u6570\u636e\u540c\u6b65\u540e\uff0c\u518d\u4f5c\u4e3a\u65b0\u7684primary\u3002<\/p>\n<p>\u8574\u542b\u7684\u9053\u7406\u662f\uff1a<\/p>\n<ul>\n<li>R\u4e2a\u526f\u672c\u4e2d\u7248\u672c\u53f7\u6700\u9ad8\u7684\u526f\u672c\u4e00\u5b9a\u8574\u542b\u4e86\u6700\u65b0\u7684\u6210\u529f\u63d0\u4ea4\u7684\u6570\u636e\u3002<\/li>\n<li>\u867d\u7136\u4e0d\u80fd\u786e\u5b9a\u7248\u672c\u53f7\u6700\u9ad8\u7684\u6570\u636e == \u8fd9\u4e2a\u6700\u65b0\u6210\u529f\u63d0\u4ea4\u7684\u6570\u636e\uff0c\u4f46\u65b0\u7684primary\u7acb\u5373\u5b8c\u6210\u4e86\u5bf9W\u4e2a\u526f\u672c\u7684\u66f4\u65b0\uff0c\u4ece\u800c\u4f7f\u5176\u53d8\u6210\u4e86\u6210\u529f\u63d0\u4ea4\u7684\u6570\u636e<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff1aN = 5 W = 3 R = 3\u7684\u7cfb\u7edf\uff0c\u67d0\u65f6\u523b\u526f\u672c\u72b6\u6001(V2 V2 V1 V1 V1)\uff0c\u6b64\u65f6V1\u662f\u6700\u65b0\u6210\u529f\u63d0\u4ea4\u7684\u6570\u636e\uff0cV2\u662f\u5904\u4e8e\u4e2d\u95f4\u72b6\u6001\u672a\u6210\u529f\u63d0\u4ea4\u7684\u6570\u636e\u3002V2\u662f\u4f5c\u4e3a\u810f\u6570\u636e\u6254\u6389\uff0c\u8fd8\u662f\u4f5c\u4e3a\u65b0\u6570\u636e\u88ab\u540c\u6b65\uff0c\u5b8c\u5168\u53d6\u51b3\u4e8e\u80fd\u5426\u53c2\u4e0eq\u4e3b\u6301\u7684\u65b0primary\u7684\u9009\u4e3e\u5927\u4f1a\u3002\u5982\u679cq\u9009\u62e9(V1 V1 V1)\uff0c\u5219\u5728\u63a5\u4e0b\u6765\u7684\u66f4\u65b0\u8fc7\u7a0b\u4e2d V2\u4f1a\u88ab\u5f53\u6210\u810f\u6570\u636e\u6254\u6389\uff1b\u5982\u679cq\u9009\u62e9(V2 V1 V1)\u5219V2\u4f1a\u5c06V1\u66f4\u65b0\u6389\uff0c\u6210\u4e3a\u6700\u65b0\u6210\u529f\u7684\u6570\u636e\u3002<\/p>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p1.pstatp.com\/large\/pgc-image\/1539932576795ac9002d090\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<div class=\"pgc-img\"><img decoding=\"async\" src=\"http:\/\/p9.pstatp.com\/large\/pgc-image\/15399325767721e73ae62c3\" alt=\"\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff1f\" \/><\/div>\n<p>2.5 \u65e5\u5fd7\u6280\u672f<\/p>\n<p>\u65e5\u5fd7\u6280\u672f\u4e0d\u662f\u4e00\u79cd\u5206\u5e03\u5f0f\u7cfb\u7edf\u6280\u672f\uff0c\u4f46\u5206\u5e03\u5f0f\u7cfb\u7edf\u5e7f\u6cdb\u4f7f\u7528\u65e5\u5fd7\u6280\u672f\u505adown\u673a\u6062\u590d\u3002<\/p>\n<p>2.5.1 \u6570\u636e\u5e93\u7cfb\u7edf\u65e5\u5fd7\u56de\u987e<\/p>\n<p>\u6570\u636e\u5e93\u7684\u65e5\u5fd7\u5206\u4e3a undo redo redo\/undo no-redo\/no-undo\u56db\u79cd\uff0c\u8fd9\u91cc\u4e0d\u505a\u8fc7\u591a\u4ecb\u7ecd\u3002<\/p>\n<p>2.5.2 redo\u4e0echeck point<\/p>\n<p>\u901a\u8fc7redo log\u6062\u590ddown\u673a\u7684\u7f3a\u70b9\u662f\u9700\u8981\u626b\u63cf\u6574\u4e2aredolog\uff0c\u56de\u653e\u6240\u6709redo\u65e5\u5fd7\u3002\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u7684\u529e\u6cd5\u662f\u5f15\u5165checkpoint\u6280\u672f\uff0c\u7b80\u5316\u6a21\u578b\u4e0bcheckpoint\u5c31\u662f\u5728begin\u548cend\u4e2d\u95f4\uff0c\u5c06\u5185\u5b58\u4ee5\u67d0\u79cd\u6570\u636e\u7ec4\u7ec7\u65b9\u5f0fdump\u5230\u78c1\u76d8\u4e0a\u3002\u8fd9\u6837down\u673a\u6062\u590d\u65f6\u53ea\u9700\u8981\u4ece\u6700\u540e\u4e00\u4e2aend\u5411\u524d\u627e\u5230\u6700\u8fd1\u4e00\u4e2abegin\uff0c\u6062\u590d\u4e2d\u95f4\u7684\u5185\u5b58\u72b6\u6001\u5373\u53ef\u3002<\/p>\n<p>2.5.3 no-undo\/no-redo<\/p>\n<p>\u8fd9\u79cd\u6280\u672f\u4e5f\u53eb\u505a01\u76ee\u5f55\uff0c\u5373\u6709\u4e24\u4e2a\u76ee\u5f55\uff0c\u6d3b\u52a8\u76ee\u5f55\u548c\u975e\u6d3b\u52a8\u76ee\u5f55\uff0c\u53e6\u5916\u8fd8\u6709\u4e00\u4e2a\u4e3b\u8bb0\u5f55\uff0c\u8981\u4e48\u201c\u8bb0\u5f55\u76ee\u5f550\u201d\uff0c\u5996\u9b54\u8bb0\u5f55\u201c\u4f7f\u7528\u76ee\u5f551\u201d\uff0c\u76ee\u5f550\u548c1\u8bb0\u5f55\u4e86\u5404\u4e2a\u6570\u636e\u5728\u65e5\u5fd7\u6587\u4ef6\u4e2d\u7684\u4f4d\u7f6e\u3002<\/p>\n<p>2.6 \u4e24\u9636\u6bb5\u63d0\u4ea4\u534f\u8bae<\/p>\n<p>2.7 \u57fa\u4e8eMVCC\u7684\u5206\u5e03\u5f0f\u4e8b\u52a1<\/p>\n<p>\u7531\u4e8e\u8fd9\u4e24\u4e2a\u90fd\u4e0e\u6570\u636e\u5e93\u4e8b\u52a1\u6709\u5173\uff0c\u4e14\u4e24\u9636\u6bb5\u63d0\u4ea4\u534f\u8bae\u5728\u5de5\u7a0b\u4e2d\u4f7f\u7528\u4ef7\u503c\u4e0d\u9ad8\uff0c\u5747\u7565\u53bb\u4e0d\u8c08\u3002<\/p>\n<p>2.8 Paxos\u534f\u8bae<\/p>\n<p>\u552f\u4e00\u5728\u5de5\u7a0b\u4e2d\u6709\u4f7f\u7528\u4ef7\u503c\u7684\u53bb\u4e2d\u5fc3\u5316\u526f\u672c\u8282\u70b9\u63a7\u5236\u534f\u8bae\u3002\u8fc7\u4e8e\u590d\u6742\uff0c\u6ca1\u770b\u61c2\u3002<\/p>\n<p>2.9 CAP\u7406\u8bba<\/p>\n<ul>\n<li>Consitency<\/li>\n<li>Availiablity<\/li>\n<li>Tolerance to the Partition of network<\/li>\n<\/ul>\n<p>\u65e0\u6cd5\u8bbe\u8ba1\u4e00\u79cd\u5206\u5e03\u5f0f\u534f\u8bae\uff0c\u4f7f\u5f97\u5b8c\u5168\u5177\u5907CAP\u4e09\u4e2a\u5c5e\u6027\u3002\u6c38\u8fdc\u53ea\u80fd\u4ecb\u4e8e\u4e09\u8005\u4e4b\u95f4\u6298\u4e2d\u3002\u7406\u8bba\u7684\u610f\u4e49\u662f\uff1a\u4e0d\u8981\u5984\u60f3\u8bbe\u8ba1\u5b8c\u7f8e\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u3002<\/p>\n<p>\u8f6c\u53d1 \u8f6c\u53d1 \u8f6c\u53d1 \u91cd\u8981\u7684\u4e8b\u60c5\u8bf43\u904d \u8f6c\u53d1\u5173\u6ce8\u6211\u79c1\u4fe1\u4f1a\u53d1:Java\u67b6\u6784 \u9886\u53d6\u5206\u5e03\u5f0f\u67b6\u6784\u601d\u7ef4\u5bfc\u56fe \u4ee5\u53ca\u8d44\u6df1\u67b6\u6784\u5e08\u8bb2\u89e3\u7684\u5206\u5e03\u5f0f\u7cbe\u8bb2\u89c6\u9891\u8d44\u6599\uff08\u8fd8\u4f1a\u63d0\u4f9b\u9ad8\u5e76\u53d1\uff0cspring\u6e90\u7801\uff0cmybatis\u6e90\u7801\uff0cdubbo\uff0cnetty\u7b49\u591a\u4e2a\u77e5\u8bc6\u70b9\u7684\u89c6\u9891\u6280\u672f\u5206\u4eab\uff01<\/p>\n<\/div>\n<\/div>\n<div class=\"bui-box article-tag\">\n<div class=\"bui-left\"><i class=\"bui-icon icon-tag\"><\/i><\/p>\n<ul class=\"tag-list\">\n<li class=\"tag-item\"><a class=\"label-link\" href=\"https:\/\/www.toutiao.com\/search\/?keyword=%E7%BC%96%E7%A8%8B%E8%AF%AD%E8%A8%80\" target=\"_blank\" rel=\"noopener\">\u7f16\u7a0b\u8bed\u8a00<\/a><\/li>\n<li class=\"tag-item\"><a class=\"label-link\" href=\"https:\/\/www.toutiao.com\/search\/?keyword=Java\" target=\"_blank\" rel=\"noopener\">Java<\/a><\/li>\n<li class=\"tag-item\"><a class=\"label-link\" href=\"https:\/\/www.toutiao.com\/search\/?keyword=GFS\" target=\"_blank\" rel=\"noopener\">GFS<\/a><\/li>\n<li class=\"tag-item\"><a class=\"label-link\" href=\"https:\/\/www.toutiao.com\/search\/?keyword=MapReduce\" target=\"_blank\" rel=\"noopener\">MapReduce<\/a><\/li>\n<li class=\"tag-item\"><a class=\"label-link\" href=\"https:\/\/www.toutiao.com\/search\/?keyword=%E9%80%9A%E4%BF%A1\" target=\"_blank\" rel=\"noopener\">\u901a\u4fe1<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"bui-right\">\n<div class=\"repin\"><i class=\"bui-icon icon-favorite_line\"><\/i>\u6536\u85cf<\/div>\n<div class=\"report\">\n<div class=\"areport\"><i class=\"bui-icon icon-report\"><\/i>\u4e3e\u62a5<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u963f\u91cc\u8d44\u6df1\u67b6\u6784\u5e08\u6559\u4f60\u5982\u4f55\u8bbe\u8ba1\u51fa\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5206<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[118],"class_list":["post-1758","post","type-post","status-publish","format-standard","hentry","tag-02-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/1758","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=1758"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/1758\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=1758"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=1758"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=1758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}