{"id":10008158,"date":"2023-08-24T19:03:21","date_gmt":"2023-08-24T11:03:21","guid":{"rendered":"https:\/\/blog.itmax.cn\/?p=10008158"},"modified":"2023-08-24T19:03:21","modified_gmt":"2023-08-24T11:03:21","slug":"flink_state-%e7%9a%84%e4%bc%98%e5%8c%96%e4%b8%8e-remote_state-%e7%9a%84%e6%8e%a2%e7%b4%a2","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10008158","title":{"rendered":"Flink_state \u7684\u4f18\u5316\u4e0e remote_state \u7684\u63a2\u7d22"},"content":{"rendered":"<blockquote>\n<p>\u6458\u8981\uff1a\u672c\u6587\u6574\u7406\u81ea bilibili \u8d44\u6df1\u5f00\u53d1\u5de5\u7a0b\u5e08\u5f20\u6768\uff0c\u5728 Flink Forward Asia 2022 \u6838\u5fc3\u6280\u672f\u4e13\u573a\u7684\u5206\u4eab\u3002\u672c\u7bc7\u5185\u5bb9\u4e3b\u8981\u5206\u4e3a\u56db\u4e2a\u90e8\u5206\uff1a<\/p>\n<ol>\n<li>\u76f8\u5173\u80cc\u666f<\/li>\n<li>state \u538b\u7f29\u4f18\u5316<\/li>\n<li>Remote state \u63a2\u7d22<\/li>\n<li>\u672a\u6765\u89c4\u5212<\/li>\n<\/ol>\n<\/blockquote>\n<p><a target=\"_blank\" href=\"https:\/\/link.segmentfault.com\/?enc=I5v%2FdAqhu2f51Q%2FPY4k73Q%3D%3D.Cu76F67KI6xnbOSiHNr%2BCXCJKzYCs7fyHmmDuHyJ8yeGLwaSLfsfkR9GBfAn1CAM5%2FlCTp1%2F1Cgf7y3YRd1N4ke77d17Q3fwEp5teojmAXI4XlyZPZUeQKUr1tWlTiKHOGvKGxbtRCFRA7Yyi5k2Uw%3D%3D\" rel=\"noopener noreferrer\">\u70b9\u51fb\u67e5\u770b\u539f\u6587\u89c6\u9891 &#038; \u6f14\u8bb2PPT<\/a><\/p>\n<h2>\u4e00\u3001\u76f8\u5173\u80cc\u666f<\/h2>\n<h3>1.1 \u4e1a\u52a1\u6982\u51b5<\/h3>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146645\" alt=\"1\" title=\"1\"><\/p>\n<ul>\n<li>\u4ece\u4e1a\u52a1\u89c4\u6a21\u6765\u8bb2\uff0cB \u7ad9\u76ee\u524d\u5927\u7ea6\u662f 4000+\u7684 Flink \u4efb\u52a1\uff0c\u5176\u4e2d 95%\u662f SQL \u7c7b\u578b\u3002<\/li>\n<li>\u4ece\u90e8\u7f72\u6a21\u5f0f\u6765\u8bb2\uff0cB \u7ad9\u6709 80%\u7684\u90e8\u7f72\u662f on yarn application \u90e8\u7f72\uff0c\u6211\u4eec\u7684 yarn \u96c6\u7fa4\u548c\u79bb\u7ebf\u7684 yarn \u662f\u5206\u5f00\u7684\uff0c\u662f\u5b9e\u65f6\u4e13\u7528\u7684 yarn \u96c6\u7fa4\u3002\u5269\u4e0b\u7684 20%\u4f5c\u4e1a\uff0c\u4e3a\u4e86\u54cd\u5e94\u516c\u53f8\u964d\u672c\u589e\u6548\u7684\u53f7\u53ec\uff0c\u76ee\u524d\u662f\u5728\u7ebf\u96c6\u7fa4\u6df7\u90e8\u3002\u8fd9\u4e2a\u65b9\u6848\u7684\u91c7\u7528\u4e3b\u8981\u662f\u4ece\u6210\u672c\u8003\u8651\uff0c\u76ee\u524d\u5728\u4f7f\u7528 yarn on docker\u3002<\/li>\n<\/ul>\n<p>\u4ece state \u4f7f\u7528\u60c5\u51b5\u6765\u8bb2\uff0c\u5e73\u53f0\u9ed8\u8ba4\u5f00\u542f\u7684\u5168\u90e8\u662f rocksdb statebackend\uff0c\u5927\u6982\u6709 50%\u7684\u4efb\u52a1\u90fd\u662f\u5e26\u72b6\u6001\u7684\uff0c\u5176\u4e2d\u6709\u4e0a\u767e\u4e2a\u4efb\u52a1\u7684\u72b6\u6001\u8d85\u8fc7\u4e86 500GB\uff0c\u8fd9\u79cd\u4efb\u52a1\u6211\u4eec\u79f0\u4e4b\u4e3a\u8d85\u5927\u72b6\u6001\u7684 state \u4efb\u52a1\u3002<\/p>\n<h3>1.2 statebackend \u75db\u70b9<\/h3>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146646\" alt=\"2\" title=\"2\" loading=\"lazy\"><\/p>\n<p>\u4e3b\u8981\u75db\u70b9\u6709 3 \u4e2a\uff1a<\/p>\n<ul>\n<li>cpu \u6296\u52a8\u5927\u3002rocksdb \u7684\u539f\u7406\u51b3\u5b9a\u4e86\u5b83\u4e00\u5b9a\u4f1a\u6709\u4e00\u4e2a compaction \u7684\u64cd\u4f5c\u3002\u76ee\u524d\uff0c\u5728\u5c0f\u72b6\u6001\u4e0b\u8fd9\u79cd\u64cd\u4f5c\u5bf9\u4efb\u52a1\u672c\u8eab\u6ca1\u4ec0\u4e48\u5f71\u54cd\uff0c\u4f46\u662f\u5728\u5927\u72b6\u6001\u4e0b\uff0c\u5c24\u5176\u662f\u8d85\u8fc7 500GB \u5de6\u53f3\uff0ccompaction \u4f1a\u9020\u6210 cpu \u6296\u52a8\u5927\uff0c\u5cf0\u503c\u8d44\u6e90\u8981\u6c42\u9ad8\u3002\u5c24\u5176\u662f\u5728 5\u300110\u300115 \u5206\u949f\u8fd9\u79cd checkpoint \u7684\u6574\u6570\u88ab\u95f4\u9694\u7684\u60c5\u51b5\u4e0b\uff0c\u6574\u4e2a cpu \u7684\u8d77\u4f0f\u4f1a\u6bd4\u8f83\u9ad8\u3002\u5bf9\u4e8e\u4e00\u4e2a\u4efb\u52a1\u6765\u8bf4\uff0c\u5b83\u7684\u5cf0\u503c\u8d44\u6e90\u8981\u6c42\u4f1a\u6bd4\u8f83\u9ad8\u3002\u5982\u679c\u6211\u4eec\u7684\u8d44\u6e90\u6ee1\u8db3\u4e0d\u4e86\u5cf0\u503c\u8d44\u6e90\u7684\u9700\u6c42\uff0c\u4efb\u52a1\u5c31\u4f1a\u89e6\u53d1\u4e00\u9635\u9635\u7684\u5806\u79ef\u548c\u6d88\u79ef\u7684\u60c5\u51b5\u3002<\/li>\n<li>\u6062\u590d\u65f6\u95f4\u957f\u3002\u56e0\u4e3a rocksdb \u662f\u4e00\u4e2a\u5d4c\u5165\u5f0f\u7684 DB \u5b58\u50a8\uff0c\u6bcf\u6b21\u91cd\u542f\u6216\u8005\u4efb\u52a1\u7684 rescale \u72b6\u6001\u6062\u590d\u65f6\u95f4\u957f\u3002\u56e0\u4e3a\u5b83\u8981\u628a\u5f88\u5927\u7684\u6587\u4ef6\u4e0b\u8f7d\u4e0b\u6765\uff0c\u7136\u540e\u518d\u5728\u672c\u5730\u8fdb\u884c\u4e00\u4e9b\u91cd\u65b0\u7684 reload\uff0c\u8fd9\u5c31\u9700\u8981\u4e00\u4e9b\u5927\u91cf\u7684\u626b\u63cf\u5de5\u4f5c\uff0c\u6240\u4ee5\u4f1a\u5bfc\u81f4\u6574\u4e2a\u4efb\u52a1\u7684\u72b6\u6001\u6062\u590d\u65f6\u95f4\u6bd4\u8f83\u957f\u3002\u89c2\u5bdf\u4e0b\u6765\uff0c\u6b63\u5e38\u6765\u8bf4\u5927\u4efb\u52a1\u57fa\u672c\u9700\u8981 5 \u5206\u949f\u5de6\u53f3\u624d\u80fd\u6062\u590d\u5e73\u7a33\u7684\u72b6\u6001\u3002<\/li>\n<li>rocksdb \u975e\u5e38\u4f9d\u8d56\u672c\u5730\u78c1\u76d8\u3002rocksdb \u662f\u5d4c\u5165\u5f0f\u7684 DB\uff0c\u6240\u4ee5\u4f1a\u975e\u5e38\u4f9d\u8d56\u672c\u5730 io \u7684\u80fd\u529b\u3002\u7531\u4e8e\u4eca\u5e74\u516c\u53f8\u6709\u964d\u672c\u589e\u6548\u7684\u7b56\u7565\uff0c\u6211\u4eec\u4e5f\u4f1a\u5728\u7ebf\u63a8\u8350\u4e00\u4e9b\u6df7\u90e8\uff0c\u56e0\u4e3a Flink \u7684\u5e26\u72b6\u6001\u4efb\u52a1\u6709\u5bf9\u672c\u5730 io \u4f9d\u8d56\u7684\u7279\u70b9\uff0c\u5bf9\u4e8e\u6df7\u90e8\u6765\u8bb2\u662f\u6ca1\u6cd5\u7528\u7684\uff0c\u8fd9\u5c31\u5bfc\u81f4\u6211\u4eec\u4f7f\u7528\u6df7\u90e8\u7684\u8d44\u6e90\u662f\u975e\u5e38\u6709\u9650\u7684\u3002<\/li>\n<\/ul>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146647\" alt=\"3\" title=\"3\" loading=\"lazy\"><\/p>\n<p>\u4e3b\u8981\u901a\u8fc7\u4e24\u4e2a\u65b9\u9762\u89e3\u51b3\u8fd9\u4e9b\u75db\u70b9:<\/p>\n<ul>\n<li>\u7b2c\u4e00\u4e2a\u662f state \u538b\u7f29\u3002\u51fa\u4e8e\u5bf9\u5982\u4f55\u964d\u4f4e compaction \u5f00\u9500\u7684\u601d\u8003\uff0c\u5bf9\u4efb\u52a1\u8fdb\u884c\u4e86\u4e00\u4e9b cpu \u706b\u7130\u56fe\u7684\u5206\u6790\u3002\u901a\u8fc7\u5206\u6790\u53d1\u73b0\uff0c\u6574\u4e2a cpu \u7684\u6d88\u8017\u4e3b\u8981\u5728 2 \u4e2a\u65b9\u9762\uff0c\u4e00\u4e2a\u662f compaction\uff0c\u4e00\u4e2a\u662f\u538b\u7f29\u6570\u636e\u7684\u6362\u8fdb\u6362\u51fa\uff0c\u8fd9\u5c31\u4f1a\u5e26\u6765\u5927\u91cf\u7684\u538b\u7f29\u548c\u89e3\u538b\u7f29\u7684\u5de5\u4f5c\u3002\u6240\u4ee5\u6211\u4eec\u5728\u538b\u7f29\u5c42\u505a\u4e86\u4e00\u4e9b\u5de5\u4f5c\u3002<\/li>\n<li>\u7b2c\u4e8c\u4e2a\u662f\u57fa\u4e8e\u4e91\u539f\u751f\u7684\u90e8\u7f72\u3002\u7531\u4e8e\u672c\u5730\u6ca1\u6709 io \u80fd\u529b\uff0c\u6211\u4eec\u53c2\u8003\u4e86\u4e00\u4e9b\u4e91\u539f\u751f\u7684\u65b9\u6848\uff0c\u628a\u6574\u4e2a\u672c\u5730\u7684 rocksdb backend \u8fdb\u884c\u4e86 Remote state \u7684\u5347\u7ea7\u3002\u8fd9\u76f8\u5f53\u4e8e\u4e0a\u9762\u7684\u4e00\u4e2a\u5b58\u7b97\u5206\u79bb\uff0c\u7136\u540e\u8fdc\u7a0b\u8fdb\u884c\u4e86\u670d\u52a1\u5316\u7684\u64cd\u4f5c\u3002\u8fd9\u6837\u5c31\u53ef\u4ee5\u5b9e\u73b0\u5373\u8fde\u5373\u7528\uff0c\u4e0d\u9700\u8981\u8fdb\u884c reload \u7684\u64cd\u4f5c\uff0c\u6574\u4e2a state \u662f\u57fa\u4e8e\u8fdc\u7a0b\u5316\u8fdb\u884c\u7684\u3002<\/li>\n<\/ul>\n<h2>\u4e8c\u3001state \u538b\u7f29\u4f18\u5316<\/h2>\n<h3>2.1 \u4e1a\u52a1\u573a\u666f<\/h3>\n<p>\u4ece\u4e1a\u52a1\u573a\u666f\u89d2\u5ea6\u6765\u770b\uff0c\u5927 state \u5206\u6790\u4e0b\u6765\uff0c\u5b83\u4e3b\u8981\u96c6\u4e2d\u4e8e\u6a21\u578b\u8bad\u7ec3\u548c\u6837\u672c\u62fc\u63a5\u3002\u6211\u4eec\u7684\u5546\u4e1a\u5316\u548c AI \u63a8\u8350\u90e8\u95e8\u5c31\u662f\u8fd9\u79cd\u5178\u578b\u7684\u5e94\u7528\u573a\u666f\u3002\u5b83\u7684\u7279\u70b9\u5c31\u662f key \u6570\u636e\u91cf\u5e9e\u5927\uff0c\u5206\u5e03\u7a00\u758f\uff0c\u5f88\u96be\u547d\u4e2d cache\u3002\u4e14\u6570\u636e ttl \u77ed\uff0c\u57fa\u672c\u90fd\u662f\u5c0f\u65f6\u7ea7\u3002<\/p>\n<p>\u5982\u4e0b\u53f3\u56fe\u6240\u793a\uff0c\u6574\u4e2a\u4e1a\u52a1\u7684\u6a21\u578b\u5305\u542b\u5c55\u73b0\u548c\u70b9\u51fb\u3002\u901a\u8fc7\u8fd9\u4e24\u4e2a\u52a8\u4f5c\u6211\u4eec\u8fdb\u884c\u4e86\u6821\u9a8c\uff0c\u7136\u540e\u5b8c\u6210\u8ba1\u7b97\uff0c\u4ece\u800c\u751f\u6210\u6837\u672c\uff0c\u518d\u704c\u5165\u6a21\u578b\u8fdb\u884c\u8bad\u7ec3\u3002\u8fd9\u4e2a\u573a\u666f\u4e0b\u5b83\u7684\u7279\u70b9\u662f\u7f13\u5b58\u5931\u6548\u5c31\u5f88\u5feb\u5931\u6548\uff0c\u5b83\u7684 key \u6570\u91cf\u6bd4\u8f83\u5927\u4e14\u6bd4\u8f83\u7a00\u758f\u3002<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146648\" alt=\"4\" title=\"4\" loading=\"lazy\"><\/p>\n<p>\u7b2c\u4e8c\u4e2a\u70b9\u662f\u6570\u636e\u7684\u63d0\u4ea4\u6bd4\u8f83\u77ed\uff0c\u90a3\u4e48\u6574\u4e2a\u7f13\u5b58\u7684\u5931\u6548\u4f1a\u6bd4\u8f83\u5feb\uff0c\u8fd9\u6837\u5c31\u4f1a\u5bfc\u81f4 rocksdb \u5728\u4f7f\u7528\u7684\u65f6\u5019\u4f1a\u53cd\u590d\u4ece\u78c1\u76d8\u91cc\u4e0d\u65ad\u5730 reload \u6570\u636e\uff0c\u7136\u540e\u8fdb\u884c\u538b\u7f29\u548c\u89e3\u538b\u7f29\uff0c\u6216\u8005\u4e2d\u95f4 compaction \u6570\u636e\u4e0d\u65ad\u5730\u8fc7\u671f\uff0c\u5bfc\u81f4 compaction \u8fc7\u4e8e\u9891\u7e41\u3002<\/p>\n<h3>2.2 \u4f18\u5316\u601d\u8def<\/h3>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146649\" alt=\"5\" title=\"5\" loading=\"lazy\"><\/p>\n<p>\u4ee5\u4e0a\u4e24\u4e2a\u95ee\u9898\u4f1a\u5bfc\u81f4\u6574\u4e2a cpu \u7684\u6d88\u8017\u975e\u5e38\u9ad8\uff0c\u6240\u4ee5\u6211\u4eec\u80fd\u89c2\u5bdf\u5230\uff0c\u5728\u524d\u9762\u63d0\u53ca\u7684\u6574\u4e2a\u4efb\u52a1\u7684\u5cf0\u503c cpu \u6d88\u8017\u4f1a\u975e\u5e38\u9ad8\u3002\u6211\u4eec\u7684\u4f18\u5316\u601d\u8def\u662f\u901a\u8fc7\u5305\u62ec\u5bf9\u793e\u533a\u7684\u4e00\u4e9b\u65b9\u6848\u548c\u4e1a\u754c\u5176\u4ed6\u516c\u53f8\u5206\u4eab\u7684\u4e00\u4e9b\u6587\u7ae0\u8fdb\u884c\u7684\u8c03\u7814\uff0c\u8c03\u7814\u548c\u4f18\u5316\u65b9\u6848\u4e3b\u8981\u56f4\u7ed5\u4e09\u4e2a\u65b9\u9762\u8fdb\u884c\uff1a<\/p>\n<ul>\n<li>\u7b2c\u4e00\u4e2a\u662f\u5f00\u542f partitoned index filter\uff0c\u51cf\u5c11\u7f13\u5b58\u7ade\u4e89\u3002\u4ece\u706b\u7130\u56fe\u4e2d\u53ef\u4ee5\u770b\u5230\uff0cdata block \u4f1a\u4e0d\u65ad\u5730\u4ece block cache \u4e2d\u88ab\u6362\u8fdb\u6362\u51fa\uff0c\u540c\u65f6\u4ea7\u751f\u5927\u91cf\u7684\u538b\u7f29\u548c\u89e3\u538b\u7f29\u5de5\u4f5c\uff0c\u5927\u91cf\u7684 cpu \u5176\u5b9e\u6d88\u8017\u5728\u8fd9\u91cc\u3002<\/li>\n<li>\u7b2c\u4e8c\u4e2a\u662f\u5173\u95ed rocksdb \u538b\u7f29\uff0c\u51cf\u5c11\u7f13\u5b58\u52a0\u8f7d \/compaction \u65f6\u5019\u7684 cpu \u6d88\u8017\u3002\u4ece\u706b\u7130\u56fe\u4e2d\u53ef\u4ee5\u770b\u5230\uff0c\u6574\u4e2a SSD \u6570\u636e\u8fdb\u884c\u5e95\u5c42\u751f\u6210\u7684\u65f6\u5019\uff0c\u5b83\u4f1a\u4e0d\u65ad\u5730\u8fdb\u884c\u6574\u4e2a\u6587\u4ef6\u7684\u538b\u7f29\u548c\u89e3\u538b\u7f29\u3002\u6240\u4ee5\u6211\u4eec\u7684\u601d\u8def\u5c31\u662f\u5982\u4f55\u53bb\u5173\u95ed\u4e00\u4e9b rocksdb \u538b\u7f29\uff0c\u51cf\u5c11\u6574\u4e2a\u7f13\u5b58\u52a0\u8f7d\u6216\u8005 cpu \u7684\u6d88\u8017\u3002<\/li>\n<li>\u7b2c\u4e09\u4e2a\u662f\u652f\u6301\u63a5\u53e3\u5c42\u538b\u7f29\uff0c\u5728\u6570\u636e state \u8bfb\u5199\u524d\u540e\u8fdb\u884c\u89e3\u538b\u7f29\u64cd\u4f5c\uff0c\u51cf\u5c11 state \u5927\u5c0f\u3002\u5982\u679c\u5173\u95ed rocksdb \u5e95\u5c42\u7684\u538b\u7f29\uff0c\u6211\u4eec\u89c2\u5bdf\u5230\u6574\u4e2a\u78c1\u76d8\u7684\u4f7f\u7528\u91cf\u975e\u5e38\u9ad8\u3002\u8fd9\u6837\u7684\u8bdd\uff0c\u538b\u529b\u5c31\u662f\u4ece\u538b\u7f29\u548c\u89e3\u538b\u7f29\u7684 cpu \u6d88\u8017\u53d8\u6210\u78c1\u76d8\u7684 io \u6d88\u8017\uff0c\u78c1\u76d8\u7684 io \u5f88\u5bb9\u6613\u5c31\u88ab\u6d88\u8017\u5c3d\u4e86\u3002\u6240\u4ee5\u6211\u4eec\u5c31\u628a\u6574\u4e2a\u5e95\u5c42\u7684\u538b\u7f29\u5f80\u4e0a\u5c42\u8fdb\u884c\u4e86\u4e00\u4e2a\u7275\u5f15\uff0c\u652f\u6301\u63a5\u53e3\u5c42\u7684\u538b\u7f29\u3002<\/li>\n<\/ul>\n<p>\u5728\u6570\u636e\u5c42\u5199\u5165\u8bfb\u5199\u524d\u540e\u8fdb\u884c\u538b\u7f29\u548c\u89e3\u538b\u7f29\u7684\u64cd\u4f5c\uff0c\u51cf\u5c11\u5e95\u5c42\u7684\u5b58\u50a8\u5927\u5c0f\uff0c\u6211\u4eec\u4e5f\u4e0e\u5185\u90e8\u7684\u4e00\u4e9b DB \u5b58\u50a8\u56e2\u961f\u8fdb\u884c\u4e86\u4e00\u4e9b\u6c9f\u901a\uff0c\u4ed6\u4eec\u4e00\u822c\u5efa\u8bae\u5728\u4e0a\u5c42\u8fdb\u884c\u538b\u7f29\uff0c\u8fd9\u6837\u4f1a\u6bd4\u5728\u5e95\u5c42\u505a\u6548\u7387\u66f4\u9ad8\u4e00\u4e9b\u3002\u56e0\u4e3a\u5e95\u5c42\u6574\u4e2a\u662f\u4ee5 Block \u7ef4\u5ea6\u8fdb\u884c\u538b\u7f29\u4e0e\u89e3\u538b\u7f29\u7684\u3002<\/p>\n<h3>2.3 \u6574\u4f53\u67b6\u6784<\/h3>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146650\" alt=\"6\" title=\"6\" loading=\"lazy\"><\/p>\n<p>partitoned index filter \u5f00\u542f\uff0cB \u7ad9\u5185\u90e8\u76ee\u524d\u4e3b\u8981\u7528\u7684\u662f Flink 1.11 \u7248\u672c\u3002\u5f53\u521d\u6211\u4eec\u5927\u6982\u8c03\u7814\u5230\u8fd9\u4e2a\u53c2\u6570\u7684\u65f6\u5019\uff0c\u53d1\u73b0\u793e\u533a\u672c\u8eab\u5728 1.12 \u7248\u672c\u5df2\u7ecf\u63d0\u5347\u4e86\u8fd9\u4e2a\u529f\u80fd\uff0c\u6240\u4ee5\u5c31\u76f4\u63a5\u628a 1.12 \u7248\u672c\u76f8\u5173\u7684\u529f\u80fd\u76f4\u63a5\u7528\u8fc7\u6765\u4e86\uff0c\u540c\u65f6 rocksdb \u538b\u7f29\u5173\u95ed\uff0c\u5b98\u65b9\u6587\u6863\u5747\u6709\u53c2\u6570\uff0c\u8fd9\u4e2a\u90e8\u5206\u6210\u672c\u6bd4\u8f83\u4f4e\u3002<\/p>\n<p>\u7b2c\u4e8c\u4e2a\u90e8\u5206\u662f\u652f\u6301\u4e1a\u52a1\u7684\u538b\u7f29\u3002\u4e3a\u4e86\u51cf\u5c11\u78c1\u76d8 io \u7684\u538b\u529b\uff0c\u5728\u63a5\u53e3\u4e0a\u505a\u4e86\u4e00\u4e9b\u538b\u7f29\u3002\u63a5\u53e3\u538b\u7f29\u67b6\u6784\uff0c\u5982\u4e0a\u56fe\uff0c\u91cd\u5199\u4e86\u6240\u6709 rocksdb state \u7684 put\/get \u63a5\u53e3\uff0c\u4f7f\u7528\u7684\u662f\u6700\u65b0\u7684 Zstd \u538b\u7f29\u7b97\u6cd5\u3002\u76ee\u524d\u4f7f\u7528\u7684\u662f LTZ \u7b97\u6cd5\uff0c\u6bd4\u4e00\u4e9b\u5e38\u7528\u7684\u538b\u7f29\u6536\u76ca\u66f4\u9ad8\uff0ccpu \u7684\u6d88\u8017\u6bd4\u8f83\u5c0f\u3002<\/p>\n<h3>2.4 \u4e1a\u52a1\u6548\u679c<\/h3>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146651\" alt=\"7\" title=\"7\" loading=\"lazy\"><\/p>\n<p>\u5982\u4e0a\u4e1a\u52a1\u6548\u679c\u5bf9\u6bd4\u56fe\uff0c\u8fd9\u91cc\u9762\u5305\u542b test 1\u30012\u30013\u30014\uff0c\u4e3b\u8981\u770b\u770b test 0 \u548c test 4\u3002test 0 \u662f\u793e\u533a\u9ed8\u8ba4\u7684\u65b9\u6848\uff0c\u4e5f\u5c31\u662f\u5e95\u5c42\u7528\u662f snappy \u538b\u7f29\uff0c\u4e0a\u5c42\u4e0d\u505a\u4ec0\u4e48\u3002test 4 \u662f\u5b8c\u5168\u5173\u95ed\u4e86\u5e95\u5c42\u7684\u538b\u7f29\uff0c\u65e0\u8bba\u662f\u4e0a\u5c42\u8fd8\u662f\u5e95\u5c42\uff0c\u6574\u4e2a\u538b\u7f29\u662f\u5168\u90e8\u5173\u95ed\u7684\uff0c\u5728\u4e1a\u52a1\u5c42\u4f7f\u7528\u4e86\u6700\u65b0\u7684 STD \u65b9\u6cd5\u8fdb\u884c\u538b\u7f29\u3002<\/p>\n<p>\u6574\u4e2a\u89c2\u5bdf\u4e0b\u6765\uff0c\u5cf0\u503c\u548c\u4f4e\u5cf0\u671f\u7684\u6570\u636e\u90fd\u8fdb\u884c\u4e86\u67e5\u770b\uff0ccpu \u5747\u503c\u5927\u6982\u662f\u4e0b\u964d\u5230 15%\u5de6\u53f3\uff0c\u5cf0\u503c\u5927\u6982\u4e0b\u964d\u5230 25%\uff0c\u76f8\u4fe1\u5bf9\u6bdb\u523a\u7684\u4e0b\u964d\u4f1a\u66f4\u660e\u663e\u4e00\u4e9b\u3002\u53e6\u5916\uff0c\u5728\u4e1a\u52a1\u5c42\u505a\u5b8c\u538b\u7f29\u4e4b\u540e\uff0c\u8fd9\u4e2a\u6587\u4ef6\u5927\u5c0f\u57fa\u672c\u4fdd\u6301\u4e0d\u53d8\uff0c\u6216\u662f\u53ea\u63d0\u5347\u4e86\u4e00\u70b9\u70b9\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u6700\u5e95\u5c42\u7684\u5b58\u50a8\u7a7a\u95f4\u6216\u8005 io \u5176\u5b9e\u5b8c\u5168\u6ca1\u6709\u589e\u52a0\u4efb\u4f55\u538b\u529b\u3002<\/p>\n<p>\u76ee\u524d\u6765\u8bb2\uff0c\u7ebf\u4e0a\u6240\u6709\u65b0\u589e\u7684\u5927\u7684\u4efb\u52a1\u57fa\u672c\u90fd\u5df2\u7ecf\u5168\u90e8\u5f00\u542f\u4e86\uff0c\u8001\u7684\u4efb\u52a1\u4e5f\u5728\u8fdb\u884c\u4e00\u4e9b\u63a8\u8fdb\u3002<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146652\" alt=\"8\" title=\"8\" loading=\"lazy\"><\/p>\n<p>\u6700\u540e\u8865\u5145\u4e0b\u8fd9\u4e2a\u573a\u666f\u7684\u9002\u5e94\u6027\u3002\u56e0\u4e3a\u6574\u4e2a\u65b9\u6848\u662f\u5339\u914d\u5230\u6211\u4eec\u7684\u63a8\u8350\u529f\u80fd\u6216\u662f\u5e7f\u544a\u6a21\u578b\u62fc\u63a5\u573a\u666f\u6765\u505a\u7684\uff0c\u6240\u6709\u7684\u6027\u80fd\u5206\u6790\u4e5f\u662f\u5728\u8fd9\u6837\u7684\u573a\u666f\u4e0b\u8fdb\u884c\u7684\uff0c\u7ed3\u8bba\u662f\u4e3b\u8981\u53cc\u6d41 join \u7684\u5927 state \u573a\u666f\uff0c\u5c0f state \u573a\u666f\u4e0b\u57fa\u672c\u6ca1\u6709\u6536\u76ca\uff0c\u4e3b\u8981\u539f\u56e0\u662f\u5c0f state \u7684\u6a21\u5f0f\u4e0b\uff0ccache \u672c\u8eab\u7684\u547d\u4e2d\u7387\u975e\u5e38\u9ad8\uff0c\u6362\u8fdb\u6362\u51fa\u9891\u7387\u8f83\u4f4e\u3002\u53e6\u5916\uff0cListstate \u6682\u65f6\u4e0d\u652f\u6301\u4e1a\u52a1\u5c42\u538b\u7f29\uff0cadd \u63a5\u53e3\u5e95\u5c42\u7684\u7279\u6b8a merge \u5b9e\u73b0\u6682\u65f6\u65e0\u6cd5\u505a\u4e1a\u52a1\u5c42\u538b\u7f29\u3002<\/p>\n<h2>\u4e09\u3001Remote state \u63a2\u7d22<\/h2>\n<h3>3.1 \u4e1a\u52a1\u573a\u666f\u548c\u95ee\u9898<\/h3>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146653\" alt=\"9\" title=\"9\" loading=\"lazy\"> <\/p>\n<p>\u7b2c\u4e00\uff0c\u964d\u672c\u589e\u6548\u3002\u8fd9\u662f\u4eca\u5e74\u5927\u90e8\u5206\u4e92\u8054\u7f51\u516c\u53f8\u53ef\u80fd\u90fd\u5728\u505a\u7684\u4e8b\u60c5\uff0cB \u7ad9\u4e5f\u4e0d\u5217\u5916\u3002\u6211\u4eec\u5728\u63a8\u4e00\u4e2a\u79bb\u5728\u7ebf\u6df7\u90e8\uff0c\u4e3b\u8981\u662f\u4e3a\u4e86\u63d0\u5347\u8d44\u6e90\u7684\u4f7f\u7528\u6548\u7387\u3002\u628a Flink \u5927\u6570\u636e\u7684\u573a\u666f\u548c\u5728\u7ebf\u670d\u52a1\u7684\u573a\u666f\u8fdb\u884c\u8d44\u6e90\u7684\u6df7\u90e8\u3002<\/p>\n<p>\u7b2c\u4e8c\uff0c\u5927 state \u4f5c\u4e1a\u91cd\u542f\u4e0b\u8f7d state \u6162\u3002\u6709\u4e9b\u7528\u6237\u53cd\u5e94\uff0c\u5bf9\u4e00\u4e9b\u91cd\u542f\u65f6\u95f4\u6bd4\u8f83\u654f\u611f\u7684\u4e1a\u52a1\u65b9\uff0c\u4f1a\u89c9\u5f97\u5927\u72b6\u6001\u4e0b\u7684\u91cd\u542f\u5bf9\u4e1a\u52a1\u4f1a\u6709\u4e00\u4e9b\u6296\u52a8\uff0c\u5c24\u5176\u5728\u5e7f\u544a\u3001AI \u6a21\u578b\u63a8\u8350\u7b49\u65b9\u9762\u4f53\u9a8c\u611f\u4e0d\u597d\u3002<\/p>\n<p>\u7b2c\u4e09\uff0c\u5927 state \u4f5c\u4e1a\u91cd\u542f\u52a0\u8f7d state \u6162\u3002\u5e0c\u671b\u5728\u91cd\u542f\u6216\u662f\u6269\u5bb9\u7684\u65f6\u5019\uff0c\u52a0\u8f7d\u66f4\u5feb\u4e00\u4e9b\u3002\u8fd9\u91cc\u5305\u62ec\u4e24\u4e2a\u4e1a\u52a1\u573a\u666f\uff0c\u4e00\u4e2a\u662f\u79bb\u5728\u7ebf\u6df7\u90e8\uff0c\u7b2c\u4e8c\u4e2a\u662f\u7528\u6237\u7684\u91cd\u542f\u4f53\u9a8c\u3002\u8fd9\u4e24\u4e2a\u65b9\u9762\u5373\u4f7f\u662f\u7528 rocksdb \u6765\u505a\u90fd\u6bd4\u8f83\u96be\u3002\u4f8b\u5982\u5728\u7ebf\u6df7\u90e8\uff0c\u56e0\u4e3a\u5728\u7ebf\u7684\u673a\u5668\u7684\u78c1\u76d8\u57fa\u672c\u662f 100-200GB \u7684\u90a3\u79cd\u672c\u5730\u8f83\u5c0f\u7684\u78c1\u677f\uff0c\u540c\u65f6 io \u6027\u80fd\u4e5f\u4e0d\u662f\u5f88\u9ad8\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5c06Flink\u5927\u4efb\u52a1\u4e22\u5230\u5728\u7ebf\u6df7\u90e8\u4e0a\u53bb\uff0c\u4f1a\u5bf9\u5728\u7ebf\u7684\u673a\u5668\u8d1f\u8f7d\u538b\u529b\u6bd4\u8f83\u5927\u3002\u8fd9\u5c31\u9020\u6210\u5728\u7ebf\u6df7\u90e8\u4e0a\u7684\u4efb\u52a1\u662f\u76f8\u5bf9\u6709\u9650\u7684\u3002<\/p>\n<p>\u5176\u5b9e\u7528\u6237\u5f88\u96be\u533a\u5206\u5230\u5e95\u54ea\u4e9b\u4efb\u52a1\u662f\u53ef\u4ee5\u4e22\u5230\u5728\u7ebf\u6df7\u90e8\uff0c\u54ea\u4e9b\u4e0d\u80fd\u3002\u8fd9\u9700\u8981\u7528\u6237\u901a\u8fc7 state \u6765\u5224\u65ad\u3002\u53e6\u5916\uff0c state \u7684\u6162\u5bfc\u81f4\u7528\u6237\u4f53\u9a8c\u6bd4\u8f83\u5dee\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5b83\u91cd\u542f\u7684\u65f6\u5019\u5f3a\u4f9d\u8d56 load \u8fc7\u7a0b\uff0c\u5c24\u5176\u662f\u5f53\u9047\u5230\u8d85\u8fc7 500GB \u7684\u4efb\u52a1\u65f6\u5019\uff0c\u8fd9\u4e2a\u4f53\u9a8c\u611f\u5c31\u4f1a\u6bd4\u8f83\u5dee\u3002<\/p>\n<h3>3.2 \u4f18\u5316\u601d\u8def<\/h3>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146654\" alt=\"10\" title=\"10\" loading=\"lazy\"><\/p>\n<p>\u9996\u5148\u662f\u5b9e\u73b0 Flink state \u7684\u5b58\u7b97\u5206\u79bb\u3002\u5982\u679c\u8fdb\u884c\u6df7\u90e8\uff0c\u672c\u5730\u5b9e\u9645\u4e0a\u6ca1\u6709\u78c1\u76d8\uff0c\u5c31\u5f88\u96be\u7ed9\u5230\u5728\u7ebf\u7684\u673a\u5668\uff0c\u5728 Flink \u4e0a\u6700\u76f4\u63a5\u7684\u529e\u6cd5\u5c31\u662f\u5b58\u7b97\u5206\u79bb\u3002\u5b58\u7b97\u5206\u79bb\u4e0d\u662f\u964c\u751f\u7684\u6982\u5ff5\uff0c\u5c24\u5176\u662f\u5728\u4e91\u4e0a\u3002\u5b58\u50a8\u653e\u5728\u5b58\u50a8\u7684\u673a\u5668\u4e0a\uff0c\u6309\u7167\u5b58\u50a8\u7684\u9700\u6c42\u8fdb\u884c\u673a\u578b\u91c7\u8d2d\uff0c\u8ba1\u7b97\u540c\u7406\u3002<\/p>\n<p>\u5176\u6b21\u662f state \u8fdc\u7a0b\u5316\/\u670d\u52a1\u5316\uff0c\u91cd\u542f \/rescale \u76f4\u63a5\u5efa\u7acb\u8fde\u63a5\u8fdb\u884c\u8bfb\u5199\u3002B \u7ad9\u7684\u505a\u6cd5\u662f\u628a Flink \u7684 state \u8fdb\u884c\u5b58\u50a8\u7684\u5206\u79bb\uff0c\u8fd9\u6837\u5c31\u80fd\u89e3\u51b3\u5728\u7ebf\u7684\u6df7\u90e8\u95ee\u9898\u3002\u5206\u79bb\u4e4b\u540e\uff0c\u5c31\u53ef\u4ee5\u8fdb\u884c\u8fdc\u7a0b\u5316\u548c\u670d\u52a1\u5316\u7684\u90e8\u7f72\uff0c\u6700\u7ec8\u91cd\u542f\u6216\u662f\u5176\u4ed6\u5c31\u80fd\u76f4\u63a5\u4e0e\u8fdc\u7a0b\u670d\u52a1\u8fdb\u884c\u8fde\u63a5\u3002<\/p>\n<p>\u7b2c\u4e09\u662f\u8fdc\u7a0b state \u670d\u52a1\u9700\u8981\u652f\u6301 checkpoint \u5b8c\u6574\u529f\u80fd\u4f9d\u8d56\u7684\u63a5\u53e3\u3002\u8fd9\u662f\u6b63\u5e38\u5f00\u53d1\u6d41\u7a0b\u4e2d\u6240\u4f9d\u8d56\u7684\uff0c\u5373\u8fdc\u7a0b\u670d\u52a1\u3002\u9700\u8981\u652f\u6301\u4e00\u4e2a checkpoint \u7684\u5b8c\u6574\u529f\u80fd\uff0c\u4e3b\u8981\u5bf9\u6807\u7684\u5c31\u662f rocksdb \u7684\u529f\u80fd\u3002<\/p>\n<h3>3.3 \u6574\u4f53\u67b6\u6784<\/h3>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146655\" alt=\"11\" title=\"11\" loading=\"lazy\"><\/p>\n<p>\u4e0a\u56fe\u662f Flink state \u6574\u4f53\u7684\u67b6\u6784\uff0c\u4e5f\u662f statebackend \u5bf9\u8c61\u62d3\u6251\uff0c\u5c31\u662f\u4e0a\u56fe\u53f3\u4fa7\u3002\u53e6\u5916\uff0cFlink statebackend \u7684\u6838\u5fc3\u6570\u636e\u6216\u662f\u6570\u636e\u5b58\u50a8\u4e3b\u8981\u662f\u7531 keyed statebackend \u627f\u62c5\uff0c\u8fd8\u6709\u4e00\u90e8\u5206\u662f\u7531 operator state \u627f\u62c5\uff0c\u8fd9\u90e8\u5206\u4e3b\u8981\u662f\u5b58\u5728\u5185\u5b58\u91cc\uff0c\u5e76\u5168\u91cf\u5f80\u8fdc\u7a0b\u5237\uff0c\u4e00\u822c\u652f\u6301\u7684\u6570\u636e\u4e0d\u4f1a\u7279\u522b\u5927\u3002<\/p>\n<p>\u6838\u5fc3\u7684\u5927\u89c4\u6a21\u6570\u636e\u4f1a\u5b58\u5728 keyed statebackend \u91cc\u3002keyed statebackend \u4e3b\u8981\u6709 heap \u548c rocksdb \u4e24\u79cd\u5b9e\u73b0\uff0c\u652f\u6301\u5927\u89c4\u6a21\u989d\u6570\u636e\u5b58\u50a8\u3002<\/p>\n<p>B \u7ad9\u4e3b\u8981\u4f7f\u7528\u7684\u662f rocksdb \u5b58\u50a8\uff0c\u4e3b\u8981\u56f4\u7ed5\u7684\u6838\u5fc3\u662f\u6539\u8fdb keyed statebackend\uff0c\u56e0\u4e3a operator state \u4e3b\u8981\u9488\u5bf9\u7684\u662f\u5c0f\u89c4\u6a21\u6570\u636e\uff0c\u5b83\u4e0d\u4f1a\u5360\u7528\u672c\u5730 io\uff0c\u4e5f\u4e0d\u4f1a\u5728\u91cd\u542f\u7684\u65f6\u5019\u4ea7\u751f\u5927\u91cf\u7684\u91cd\u590d\u64cd\u4f5c\uff0c\u901f\u5ea6\u76f8\u5bf9\u6765\u8bf4\u8981\u5feb\u5f88\u591a\u3002<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146656\" alt=\"12\" title=\"12\" loading=\"lazy\"><\/p>\n<p>\u4e0a\u56fe\u662f\u793e\u533a keyed statebackend \u7684\u5206\u914d\u903b\u8f91\u67b6\u6784\u3002\u5982\u679c\u60f3\u8981\u628a keyed statebackend \u505a\u5b58\u7b97\u5206\u79bb\uff0c\u9700\u8981\u4e86\u89e3\uff1a<\/p>\n<ul>\n<li>Flink \u7684\u5206\u7247\u903b\u8f91\uff0c\u5b83\u7684\u5e95\u5c42\u6709\u4e00\u4e2a keyed group \u7684\u6982\u5ff5\u3002\u5728\u6240\u6709\u72b6\u6001\u5728\u4efb\u52a1\u7b2c\u4e00\u6b21\u542f\u52a8\u7684\u65f6\u5019\uff0c\u5e95\u5c42\u5206\u7247\u5c31\u5df2\u7ecf\u786e\u5b9a\u597d\u4e86\u3002\u8fd9\u4e2a\u5206\u7247\u5927\u5c0f\u5c31\u662f Flink \u7684\u6700\u5927\u5e76\u53d1\u5ea6\u7684\u503c\u3002\u8fd9\u4e2a\u6700\u5927\u5e76\u53d1\u5ea6\u5b9e\u9645\u4e0a\u662f\u5728\u4efb\u52a1\u7b2c\u4e00\u6b21\u4e0d\u4ece checkpoint \u542f\u52a8\u65f6\u5019\u7b97\u51fa\u6765\u7684\u3002\u8fd9\u4e2d\u95f4\u5982\u679c\u4e00\u76f4\u4ece checkpoint \u542f\u52a8\uff0c\u90a3\u4e48\u6700\u5927\u5e76\u53d1\u5ea6\u6c38\u8fdc\u4e0d\u4f1a\u53d8\u3002<\/li>\n<li>Flink checkpoint rescale \u80fd\u529b\u662f\u6709\u9650\u7684\uff0c\u672c\u8d28\u662f\u5206\u7247 key-group \u5728 subtask \u4e4b\u95f4\u7684\u79fb\u52a8\uff0c\u5206\u7247\u65e0\u6cd5\u5206\u88c2\u3002\u4e00\u65e6\u542f\u52a8\u751f\u6210\u5207\u6362\u4e4b\u540e\uff0c\u8fd9\u4e2a\u5206\u7247\u7684\u6570\u91cf\u56e0\u4e3a\u5df2\u7ecf\u56fa\u5b9a\u597d\u4e86\uff0c\u540e\u9762\u4e0d\u7ba1\u600e\u4e48 rescale\uff0c\u672c\u8d28\u662f\u5206\u7247\u7684\u79fb\u52a8\uff0c\u5176\u5b9e\u6700\u5927\u7684\u53d8\u52a8\u662f\u540e\u9762 rescale \u4e0d\u80fd\u8d85\u8fc7\u6574\u4e2a\u5206\u7247\u7684\u6570\u91cf\uff0c\u8fd9\u4e2a\u6570\u91cf\u5bf9\u5e94\u7684\u662f\u5206\u7247\u6700\u5927\u7684\u5e76\u53d1\u5ea6\u3002<\/li>\n<li>\u591a\u4e2a key-group \u5b58\u50a8\u5728\u76f8\u540c rocksdb \u7684 cf \u91cc\u9762\uff0c\u4ee5 key-group \u7684 ID \u4f5c\u4e3a key \u7684 prefix\uff0c\u4f9d\u8d56 rocksdb \u7684\u6392\u5e8f\u7279\u6027\uff0crescale \u8fc7\u7a0b\u901a\u8fc7 prefix \u8fdb\u884c\u5b9a\u4f4d\u904d\u5386\u63d0\u53d6\u3002<\/li>\n<\/ul>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146657\" alt=\"13\" title=\"13\" loading=\"lazy\"><\/p>\n<p>\u4e0a\u56fe\u662f Remote state \u6574\u4f53\u67b6\u6784\uff0c\u4e3b\u8981\u7684\u6838\u5fc3\u5de5\u4f5c\u6709\u4e09\u70b9\uff1a<\/p>\n<ul>\n<li>\u66ff\u6362 rocksdb \u4e3a B \u7ad9\u5185\u90e8\u7684 taishan \u5b58\u50a8\u3002Taishan \u5b58\u50a8\u5e95\u5c42\u662f\u5206\u5e03\u5f0f\u7ed3\u6784\uff0cFlink \u7684\u4e00\u4e9b\u6982\u5ff5\u662f\u53ef\u4ee5\u5bf9\u5e94\u5230 taishan \u5b58\u50a8\u4e0a\u7684\u3002<\/li>\n<li>key-group \u6982\u5ff5\u5bf9\u5e94 taishan \u5b58\u50a8\u7684 shard\uff0ccf \u5bf9\u5e94 table\u3002key-group \u7684\u6982\u5ff5\u5c31\u53ef\u4ee5\u5bf9\u5e94\u4e0a taishan \u5b58\u50a8\uff0c\u540c\u65f6\u91cc\u9762 cf \u7684\u6982\u5ff5\u4e5f\u5bf9\u5e94 taishan \u5b58\u50a8\u4e2d\u7684\u4e00\u4e2a table \u6982\u5ff5\uff0c\u4e5f\u652f\u6301\u4e00\u4e2a table \u91cc\u9762\u53ef\u4ee5\u6709\u591a\u4e2a key-group\u3002<\/li>\n<li>Taishan \u5b58\u50a8\u652f\u6301\u5bf9\u5e94 shard \u7684 snapshot\uff0c\u4ee5\u53ca\u4ece\u5386\u53f2\u7684 snapshot \u8fdb\u884c\u5feb\u901f\u5207\u6362\u3002\u6bd4\u5982\u91cd\u542f\u7684\u65f6\u5019\u53ef\u4ee5\u4ece\u8001\u7684 checkpoint \u8fdb\u884c\u56de\u590d\uff0c\u5b9e\u9645\u4e0a\u80fd\u591f\u8c03\u7528 taishan \u5b58\u50a8\u8fd9\u6837\u4e00\u5957\u63a5\u53e3\u8fdb\u884c\u5feb\u901f snapshot \u5207\u6362\uff0c\u5e76\u53ef\u4ee5\u6307\u5b9a\u5bf9\u5e94\u7684 snapshot \u5e76\u8fdb\u884c\u52a0\u8f7d\uff0c\u52a0\u8f7d\u7684\u901f\u5ea6\u975e\u5e38\u5feb\uff0c\u57fa\u672c\u662f\u79d2\u7ea7\u5de6\u53f3\u3002<\/li>\n<\/ul>\n<h3>3.4 \u7f13\u5b58\u67b6\u6784<\/h3>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146658\" alt=\"14\" title=\"14\" loading=\"lazy\"><\/p>\n<p>\u5728\u4e0a\u6587\u4ecb\u7ecd\u7684\u57fa\u7840\u4e0a\u53ef\u4ee5\u89c2\u5bdf\u5230\uff0c\u5f00\u53d1\u5b8c\u4e4b\u540e\u5b9e\u9645\u4e0a\u6574\u4e2a\u529f\u80fd\u6765\u8bf4\u662f\u5b8c\u5168\u591f\u7528\u7684\uff0c\u4f46\u4e5f\u53d1\u73b0\u4e86\u4e00\u4e9b\u6bd4\u8f83\u4e25\u91cd\u7684\u6027\u80fd\u95ee\u9898\uff1a<\/p>\n<ul>\n<li>\u6bcf\u6b21 state \u64cd\u4f5c\u90fd\u9700\u8981\u8d70\u7f51\u7edc rpc\uff0c cpu \u7684\u6d88\u8017\u592a\u9ad8<\/li>\n<li>\u7f51\u7edc rpc \u7684\u5ef6\u8fdf\u9ad8\uff0c\u4efb\u52a1\u541e\u5410\u4f4e<\/li>\n<li>cache \u662f\u4e00\u4e2a\u81ea\u7136\u800c\u7136\u7684\u9009\u62e9<\/li>\n<\/ul>\n<h3>3.5 \u7f13\u5b58\u96be\u70b9<\/h3>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044146659\" alt=\"15\" title=\"15\" loading=\"lazy\"><\/p>\n<p>\u5199\u7f13\u5b58\u76f8\u5bf9\u6765\u8bb2\u662f\u6bd4\u8f83\u7b80\u5355\uff0c\u5185\u5b58\u6512\u6279\uff0c\u540e\u53f0\u5b9a\u671f checkpoint \u5237\u51fa\u53bb\u5c31\u53ef\u4ee5\u4e0a\u767e\u500d\u7684\u51cf\u5c11\u5199\u7684 rpc\u3002<\/p>\n<p>\u8bfb\u7f13\u5b58\u662f\u6bd4\u8f83\u96be\u7684\u3002\u8bfb\u7f13\u5b58\u662f\u628a\u573a\u666f\u8fdb\u884c\u62c6\u5206\u6765\u770b\uff1a<\/p>\n<ul>\n<li>key \u6bd4\u8f83\u5c11\u7684\u573a\u666f\u6548\u679c\u660e\u663e\uff0c\u547d\u4e2d\u7387\u6781\u9ad8\uff0c\u6548\u679c\u597d\uff0c\u751a\u81f3\u8fbe\u5230\u51e0\u767e\u4e0a\u5343\u500d\u7684\u6548\u679c\u63d0\u5347\u3002<\/li>\n<li>\u7a00\u758f\u7684 key \u573a\u666f\uff0c\u5927\u91cf\u8bfb null\uff0c\u7f13\u5b58\u547d\u4e2d\u7387\u4f4e\u3002\u8fd9\u4e2a\u573a\u666f\u662f\u5f53\u4e0b\u6bd4\u8f83\u5927\u7684\u96be\u70b9\u3002<\/li>\n<li>\u5468\u671f\u6027\u4e1a\u52a1\u5bfc\u81f4\u7f13\u5b58\u5b9a\u671f\u5931\u6548\uff0c\u8bfb null\uff0c\u547d\u4e2d\u7387\u66b4\u8dcc\u3002\u5468\u671f\u6027\u4e1a\u52a1\u5230\u5468\u671f\u672b\u8282\u70b9\uff0c\u5c31\u4f1a\u89e6\u53d1\u4e00\u4e2a\u7f13\u5b58\u5931\u6548\uff0c\u4e00\u65e6\u8de8\u8fc7\u8fd9\u4e2a\u8282\u70b9\uff0c\u7f13\u5b58\u91cc\u5c31\u4f1a\u53d8\u6210\u65b0\u7684\u6570\u636e\u3002\u5982\u679c\u6b63\u5de7\u9047\u4e0a\u8bfb null\uff0c\u547d\u4e2d\u7387\u5c31\u4f1a\u5f88\u4f4e\uff0c\u751a\u81f3\u5bfc\u81f4\u4efb\u52a1\u6296\u52a8\u3002\u8fd9\u4e5f\u662f\u6bd4\u8f83\u5927\u7684\u96be\u70b9\u3002<\/li>\n<\/ul>\n<p>\u57fa\u4e8e\u4ee5\u4e0a\u7684\u95ee\u9898\uff0c\u4f18\u5316\u65b9\u6848\u662f\u652f\u6301 key \u5168\u91cf\u7f13\u5b58\u914d\u7f6e\uff0c\u6709\u6548\u89e3\u51b3\u7a00\u758f\/\u7f13\u5b58\u5931\u6548\u573a\u666f\u6027\u80fd\u95ee\u9898\uff0c\u4f7f\u5185\u5b58\u4f7f\u7528\u4e0a\u5347\u3002\u4f46\u662f\u8fd9\u4e2a\u4f18\u5316\u7f3a\u70b9\u4e5f\u6bd4\u8f83\u660e\u663e\uff0c\u5373\u5bf9\u5185\u5b58\u7684\u8981\u6c42\u4f1a\u9ad8\u4e9b\u3002\u56e0\u4e3a\u6240\u6709\u7684 key 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referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043814703\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<hr>\n<p><strong>\u6d3b\u52a8\u63a8\u8350<\/strong><\/p>\n<p>\u963f\u91cc\u4e91\u57fa\u4e8e Apache Flink \u6784\u5efa\u7684\u4f01\u4e1a\u7ea7\u4ea7\u54c1-\u5b9e\u65f6\u8ba1\u7b97 Flink \u7248\u73b0\u5f00\u542f\u6d3b\u52a8\uff1a<br \/>0 \u5143\u8bd5\u7528 <a target=\"_blank\" href=\"https:\/\/link.segmentfault.com\/?enc=sqtcjbkylECU9EYKWFfcfw%3D%3D.Yqk8d172q1mNUv5Akayam5Am3bazAGp7%2BRr4oVv8cp59BtCXQwPDD44qJSWriqXp\" rel=\"noopener noreferrer\">\u5b9e\u65f6\u8ba1\u7b97 Flink \u7248<\/a>\uff085000CU*\u5c0f\u65f6\uff0c3 \u4e2a\u6708\u5185\uff09<br \/>\u4e86\u89e3\u6d3b\u52a8\u8be6\u60c5\uff1a<a target=\"_blank\" href=\"https:\/\/link.segmentfault.com\/?enc=%2FuYOPYIAWQlNdjpMvbHQ2g%3D%3D.Szl1kVTlMH%2B9Wsj3uQq7zTyzr%2B1kqyC4coXeVU%2FpHbfuON0lAMpSUhBQrWawd%2F0c\" rel=\"noopener noreferrer\">https:\/\/click.aliyun.com\/m\/1000372333\/<\/a><\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"407\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc9oHc\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000044146643\">https:\/\/segmentfault.com\/a\/1190000044146643<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6458\u8981\uff1a\u672c\u6587\u6574\u7406\u81ea bilibili \u8d44\u6df1\u5f00\u53d1\u5de5\u7a0b\u5e08\u5f20\u6768\uff0c\u5728 Flink Forward Asia 2022 \u6838 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10008158","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008158","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10008158"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008158\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10008158"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10008158"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10008158"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}