{"id":50103,"date":"2023-07-20T19:06:14","date_gmt":"2023-11-11T04:37:35","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90%e5%8d%a1%e6%a1%91%e5%be%b7%e6%8b%89%e4%b9%8b%e8%b7%af%e3%80%91cassandra%e5%93%8d%e5%ba%94%e5%bc%8f%e7%bc%96%e7%a8%8b%e9%a3%8e%e6%a0%bc-%e9%ab%98%e7%ba%a7%e4%b8%bb%e9%a2%98-%e2%91%a0\/"},"modified":"2024-04-30T14:30:46","modified_gmt":"2024-04-30T06:30:46","slug":"%e3%80%90%e5%8d%a1%e6%a1%91%e5%be%b7%e6%8b%89%e4%b9%8b%e8%b7%af%e3%80%91cassandra%e5%93%8d%e5%ba%94%e5%bc%8f%e7%bc%96%e7%a8%8b%e9%a3%8e%e6%a0%bc-%e9%ab%98%e7%ba%a7%e4%b8%bb%e9%a2%98-%e2%91%a0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90%e5%8d%a1%e6%a1%91%e5%be%b7%e6%8b%89%e4%b9%8b%e8%b7%af%e3%80%91cassandra%e5%93%8d%e5%ba%94%e5%bc%8f%e7%bc%96%e7%a8%8b%e9%a3%8e%e6%a0%bc-%e9%ab%98%e7%ba%a7%e4%b8%bb%e9%a2%98-%e2%91%a0\/","title":{"rendered":"\u3010\u5361\u6851\u5fb7\u62c9\u4e4b\u8def\u3011Cassandra\u54cd\u5e94\u5f0f\u7f16\u7a0b\u98ce\u683c &#8211; \u9ad8\u7ea7\u4e3b\u9898 \u2460\u53cd\u538b\u529b"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<h2>\u4e1c\u4eac\u5361\u73ca\u5fb7\u62c9\u65e5<\/h2>\n<p>\u4eca\u5e742023 \u5e74 6 \u6708 1 \u65e5\uff0cCassandra Day \u5c06\u5728\u65e5\u672c\u4e3e\u884c\u3002\u53bb\u5e74\uff0cCassandra Day \u5728\u67cf\u6797\u3001\u4f26\u6566\u3001\u963f\u59c6\u65af\u7279\u4e39\u3001\u6cb3\u5185\u3001\u96c5\u52a0\u8fbe\u3001\u4f11\u65af\u6566\u3001\u5723\u5854\u514b\u62c9\u62c9\u3001\u897f\u96c5\u56fe\u3001\u65b0\u52a0\u5761\u4e5f\u4e3e\u529e\u8fc7\u3002<\/p>\n<p>\u6211\u5011\u5c07\u767c\u8868\u6709\u95dcApache Cassandra\u7684\u6587\u7ae0\uff0c\u4ee5\u8fce\u63a5\u5728\u6771\u4eac\u8209\u884c\u7684\u672c\u6b21\u6d3b\u52d5\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d8f76913a08637a6d97d4\/4-0.png\" alt=\"image.png\" \/><\/div>\n<h2>\u6709\u5173Apache Cassandra<\/h2>\n<p>Apache Cassandra\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u3002<\/p>\n<p>\u4e0e\u5176\u4ed6\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u7c7b\u4f3c\uff0c\u4f7f\u7528\u591a\u4e2a\u901a\u7528\u670d\u52a1\u5668\u6784\u5efa\u4e00\u4e2a\u6570\u636e\u5e93\uff08\u4e5f\u53ef\u4ee5\u4ec5\u4f7f\u7528\u4e00\u4e2a\u670d\u52a1\u5668\u8fdb\u884c\u6784\u5efa\uff0c\u4f8b\u5982\u7528\u4e8e\u5f00\u53d1\u76ee\u7684\uff09\u3002<\/p>\n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u7701\u7565\u8be6\u7ec6\u7684\u8bf4\u660e\uff0c\u5c06\u4ecb\u7ecd\u611f\u5174\u8da3\u7684\u4eba\u7684\u89d2\u8272\u4ea4\u7ed9\u5b98\u65b9\u7f51\u7ad9\u548c\u7ef4\u57fa\u767e\u79d1\u3002<\/p>\n<p>&nbsp;<\/p>\n<h1>\u5361\u6851\u5fb7\u62c9 \u53cd\u5e94\u5f0f\u98ce\u683c \u7f16\u7a0b<\/h1>\n<p>\u672c\u6587\u7684\u5185\u5bb9\u662f\u57fa\u4e8e\u4ee5\u4e0b\u6587\u4ef6\u7684\u57fa\u7840\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u8bf7\u67e5\u9605\u672c\u6587\u4f5c\u8005\u64b0\u5199\u7684\u4ee5\u4e0b\u6587\u7ae0\uff0c\u4ecb\u7ecd\u4e86Cassandra\u53cd\u5e94\u5f0f\u7f16\u7a0b\u7684\u57fa\u672c\u7528\u6cd5\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u9ad8\u7ea7\u7684\u8bdd\u9898<\/h2>\n<h3>\u540e\u538b\u529b<\/h3>\n<p>\u54cd\u5e94\u5f0f\u7f16\u7a0b\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u529f\u80fd\u662f\u80cc\u538b\u3002<\/p>\n<p>\u5f88\u9057\u61be\uff0cCassandra\u7684\u539f\u751f\u534f\u8bae\u4e0d\u9002\u5f53\u5730\u652f\u6301\u901a\u8fc7\u7f51\u7edc\u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u8fdb\u884c\u80cc\u538b\u4fe1\u606f\u7684\u4ea4\u6362\u3002<br \/>\n\u4ece3.10\u7248\u672c\u5f00\u59cb\uff0cCassandra\u4f1a\uff08\u9ed8\u9ed8\u5730\uff09\u5bf9\u5ba2\u6237\u7aef\u8fdb\u884c\u6291\u5236\u3002<br \/>\n\u4e0e\u6b64\u540c\u65f6\uff0c\u5728\u54cd\u5e94\u5f0f\u7f16\u7a0b\u7684\u60c5\u5883\u4e0b\uff0c\u6ca1\u6709\u80cc\u538b\u673a\u5236\u3002<\/p>\n<p>\u7136\u800c\uff0c\u53ef\u4ee5\u8bf4\u5728\u4eceCassandra\u8bfb\u53d6\u6570\u636e\u65b9\u9762\uff0c\u8fd9\u5bf9\u5927\u591a\u6570\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\u5e76\u4e0d\u662f\u4e00\u4e2a\u95ee\u9898\u3002<\/p>\n<p>\u5b9e\u9645\u4e0a\uff0c\u5728\u8bfb\u53d6\u65b9\u6848\u4e2d\uff0cCassandra\u5145\u5f53\u751f\u4ea7\u8005\u89d2\u8272\uff0c\u9a71\u52a8\u7a0b\u5e8f\u5219\u662f\u6d88\u8d39\u8005\u3002\u5728\u8fd9\u79cd\u8bbe\u7f6e\u4e0b\uff0c\u5982\u679c\u4e0b\u6e38\u7684\u8ba2\u9605\u8005\u65e0\u6cd5\u5e94\u5bf9\u541e\u5410\u91cf\uff0c\u9a71\u52a8\u7a0b\u5e8f\u4f1a\u9010\u6e10\u8c03\u6574\u4ece\u670d\u52a1\u5668\u8bf7\u6c42\u9875\u9762\u7684\u901f\u7387\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u670d\u52a1\u5668\u7684\u541e\u5410\u91cf\u4f1a\u88ab\u8c03\u6574\uff0c\u4e0e\u8ba2\u9605\u8005\u7684\u541e\u5410\u91cf\u5339\u914d\u3002<\/p>\n<p>\u552f\u4e00\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u8ba2\u9605\u8005\u975e\u5e38\u7f13\u6162\uff0c\u53ef\u80fd\u4f1a\u89e6\u53d1\u67e5\u8be2\u8d85\u65f6\uff08\u5ba2\u6237\u7aef\u4f1a\u5f15\u53d1DriverTimeoutException\uff0c\u670d\u52a1\u5668\u5219\u4f1a\u5f15\u53d1ReadTimeoutException\uff09\u3002<\/p>\n<p>\u5982\u679c\u5728Cassandra\u4e2d\u8fdb\u884c\u5199\u5165\u64cd\u4f5c\uff0c\u7f3a\u4e4f\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u80cc\u538b\u901a\u4fe1\u5c06\u6210\u4e3a\u66f4\u5927\u7684\u95ee\u9898\u3002<br \/>\n\u5b9e\u9645\u4e0a\uff0c\u5728\u5199\u5165\u573a\u666f\u4e2d\uff0c\u9a71\u52a8\u7a0b\u5e8f\u626e\u6f14\u751f\u4ea7\u8005\u7684\u89d2\u8272\uff0c\u800cCassandra\u5219\u5145\u5f53\u6d88\u8d39\u8005\u3002\u5728\u8fd9\u79cd\u8bbe\u7f6e\u4e2d\uff0c\u5982\u679c\u4e0a\u6e38\u751f\u4ea7\u8005\u751f\u6210\u7684\u6570\u636e\u592a\u591a\uff0c\u9a71\u52a8\u7a0b\u5e8f\u5c06\u76f2\u76ee\u5730\u5c3d\u5feb\u5c06\u5199\u5165\u8bed\u53e5\u53d1\u9001\u5230\u670d\u52a1\u5668\uff0c\u6700\u7ec8\u53ef\u80fd\u5bfc\u81f4\u96c6\u7fa4\u8d85\u8f7d\u6216\u5d29\u6e83\u3002\u8fd9\u901a\u5e38\u901a\u8fc7WriteTimeoutException\u6216OverloadedException\u7b49\u9519\u8bef\u8868\u73b0\u51fa\u6765\u3002<\/p>\n<p>\u5728\u5199\u5165\u96c6\u4e2d\u7684\u573a\u666f\u4e2d\uff0c\u5f3a\u70c8\u5efa\u8bae\u9650\u5236\u5e76\u53d1\u6267\u884c\u5199\u5165\u8bed\u53e5\u7684\u6570\u91cf\u3002\u5b9e\u73b0\u8fd9\u4e00\u76ee\u6807\u7684\u7b80\u5355\u65b9\u6cd5\u662f\u4f7f\u7528flatMap()\u65b9\u6cd5\u3002\u5728\u5927\u591a\u6570\u54cd\u5e94\u5f0f\u5e93\u4e2d\uff0cflatMap()\u65b9\u6cd5\u91c7\u7528\u63a7\u5236\u5e76\u53d1\u6267\u884c\u6570\u91cf\u7684\u53c2\u6570\u5f62\u5f0f\u3002<\/p>\n<p>\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528Reactor\u5e93\u7684flatMap\u51fd\u6570\uff0c\u901a\u8fc7concurrency\u53c2\u6570\uff08\u4f5c\u4e3a\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff09\u6765\u6267\u884c\u6700\u591a10\u4e2a\u5e76\u53d1\u7684\u8bed\u53e5\u6d41\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nc\">Flux<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Statement<\/span><span class=\"o\">&lt;?&gt;&gt;<\/span> <span class=\"n\">stmts<\/span> <span class=\"o\">=<\/span> <span class=\"o\">...;<\/span>\r\n<span class=\"n\">stmts<\/span><span class=\"o\">.<\/span><span class=\"na\">flatMap<\/span><span class=\"o\">(<\/span><span class=\"nl\">session:<\/span><span class=\"o\">:<\/span><span class=\"n\">executeReactive<\/span><span class=\"o\">,<\/span> <span class=\"mi\">10<\/span><span class=\"o\">).<\/span><span class=\"na\">blockLast<\/span><span class=\"o\">();<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cflatMap\u540c\u6b65\u8ba2\u9605\u6700\u591a10\u4e2a\u5e76\u884c\u7684ReactiveResultSet\u5b9e\u4f8b\u3002\u540c\u65f6\u6267\u884c\u7684\u8bf7\u6c42\u6570\u91cf\u88ab\u9650\u5236\u4e3a10\u4e2a\u3002<br \/>\n\u901a\u5e38\uff0c\u8fd9\u8db3\u4ee5\u9632\u6b62\u6570\u636e\u5199\u5165\u592a\u5feb\u3002<br \/>\n\u5728\u66f4\u9ad8\u7ea7\u7684\u5b9e\u73b0\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u901f\u7387\u9650\u5236\u6216\u8282\u6d41\u6765\u63a7\u5236\u6d41\u7684\u6267\u884c\u3002\u4f8b\u5982\uff0cReactor\u63d0\u4f9b\u4e86\u4e00\u4e2a\u65b9\u6cd5delayElements\u6765\u9650\u5236\u4e0a\u6e38\u53d1\u5e03\u8005\u7684\u541e\u5410\u91cf\u3002\u6709\u5173\u66f4\u591a\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u5e93\u7684\u6587\u6863\u3002<\/p>\n<p>\u4e3a\u4e86\u4f5c\u4e3a\u6700\u540e\u7684\u624b\u6bb5\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u5185\u7f6e\u7684\u9a71\u52a8\u7a0b\u5e8f\u8981\u6c42\u9650\u5236\u673a\u5236\uff0c\u4ee5\u5728\u9a71\u52a8\u7a0b\u5e8f\u7ea7\u522b\u4e0a\u9650\u5236\u5e76\u53d1\u6267\u884c\u3002\u7136\u800c\uff0c\u5728\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u8fd9\u5728\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f\u4e2d\u662f\u4e0d\u9700\u8981\u7684\u3002\u6709\u5173\u4e00\u4e9b\u793a\u4f8b\uff0c\u8bf7\u53c2\u9605\u5f00\u53d1\u8005\u6307\u5357\u4e2d\u7684\u201cManaging concurrency in asynchronous query execution\uff08\u5728\u5f02\u6b65\u67e5\u8be2\u6267\u884c\u4e2d\u7ba1\u7406\u5e76\u53d1\uff09\u201d\u90e8\u5206\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u4e1c\u4eac\u5361\u73ca\u5fb7\u62c9\u65e5 \u4eca\u5e742023 \u5e74 6 \u6708 1 \u65e5\uff0cCassandra Day \u5c06\u5728\u65e5\u672c\u4e3e\u884c\u3002\u53bb\u5e74\uff0cCas [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-50103","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u3010\u5361\u6851\u5fb7\u62c9\u4e4b\u8def\u3011Cassandra\u54cd\u5e94\u5f0f\u7f16\u7a0b\u98ce\u683c - 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