{"id":1918,"date":"2020-07-21T17:18:27","date_gmt":"2020-07-21T09:18:27","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1918"},"modified":"2020-07-21T17:18:27","modified_gmt":"2020-07-21T09:18:27","slug":"%e5%88%86%e5%b8%83%e5%bc%8f%e5%ad%98%e5%82%a8%e7%b3%bb%e7%bb%9f-curve%e4%bb%8b%e7%bb%8d","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1918","title":{"rendered":"\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf Curve\u4ecb\u7ecd"},"content":{"rendered":"<p>CURVE \u662f\u7f51\u6613\u5f00\u6e90\u7684\u9ad8\u6027\u80fd\u3001\u9ad8\u53ef\u7528\u3001\u9ad8\u53ef\u9760\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf\uff0c\u5177\u6709\u975e\u5e38\u826f\u597d\u7684\u6269\u5c55\u6027\u3002\u57fa\u4e8e\u8be5\u5b58\u50a8\u5e95\u5ea7\u53ef\u4ee5\u6253\u9020\u9002\u7528\u4e8e\u4e0d\u540c\u5e94\u7528\u573a\u666f\u7684\u5b58\u50a8\u7cfb\u7edf\uff0c\u5982\u5757\u5b58\u50a8\u3001\u5bf9\u8c61\u5b58\u50a8\u3001\u4e91\u539f\u751f\u6570\u636e\u5e93\u7b49\u3002CURVE \u7684\u8bbe\u8ba1\u5f00\u53d1\u59cb\u7ec8\u56f4\u7ed5\u4e09\u4e2a\u7406\u5ff5\uff1a\u4e00\u662f\u987a\u5e94\u5f53\u524d\u5b58\u50a8\u786c\u4ef6\u8bbe\u65bd\u53d1\u5c55\u8d8b\u52bf\uff0c\u505a\u5230\u8f6f\u786c\u4ef6\u7ed3\u5408\u6253\u9020\u9876\u7ea7\u7684\u5b58\u50a8\u4ea7\u54c1\uff1b\u4e8c\u662f\u79c9\u6301 \u201cSimple Can be harder than complex\u201d\uff0c\u4e86\u89e3\u95ee\u9898\u672c\u8d28\u60c5\u51b5\u4e0b\u9009\u62e9\u6700\u7b80\u5355\u7684\u65b9\u6848\u89e3\u51b3\u95ee\u9898\uff1b\u4e09\u662f\u62e5\u62b1\u5f00\u6e90\uff0c\u5728\u5145\u5206\u8c03\u7814\u7684\u524d\u63d0\u4e0b\u4f7f\u7528\u4f18\u79c0\u7684\u5f00\u6e90\u9879\u76ee\u7ec4\u4ef6\uff0c\u907f\u514d\u9020\u8f6e\u5b50\u3002<br \/>\n\u5f53\u524d\u7f51\u6613\u57fa\u4e8e CURVE \u5df2\u7ecf\u5b9e\u73b0\u4e86\u9ad8\u6027\u80fd\u5757\u5b58\u50a8\u7cfb\u7edf\uff0c\u652f\u6301\u5feb\u7167\u514b\u9686\u548c\u6062\u590d ,\u652f\u6301 QEMU \u865a\u62df\u673a\u548c\u7269\u7406\u673a NBD \u8bbe\u5907\u4e24\u79cd\u6302\u8f7d\u65b9\u5f0f, \u5728\u7f51\u6613\u5185\u90e8\u4f5c\u4e3a\u9ad8\u6027\u80fd\u4e91\u76d8\u4f7f\u7528\u3002<br \/>\n<img class=\\\"zoom-in-cursor\\\" src=\\\"https:\/\/static.oschina.net\/uploads\/space\/2020\/0716\/181103_s6fo_4487475.png\\\" alt=\\\"\\\" width=\\\"962\\\" height=\\\"556\\\" \/><\/p>\n<h3><strong>\u7279\u6027<\/strong><\/h3>\n<h4>1. \u9ad8\u6027\u80fd<\/h4>\n<p>\u9ad8\u6027\u80fd\u662f CURVE \u7684\u4e00\u5927\u7279\u70b9\uff0c\u4e5f\u662f\u9879\u76ee\u56e2\u961f\u521b\u5efa CURVE \u9879\u76ee\u7684\u521d\u8877\u3002RPC \u5c42\u9762 CURVE \u91c7\u7528\u4e86\u9ad8\u6027\u80fd\u548c\u4f4e\u5ef6\u8fdf\u5e76\u4e14\u5df2\u5f00\u6e90\u7684\u00a0<a href=\\\"https:\/\/github.com\/apache\/incubator-brpc\\\">brpc<\/a>\uff1b\u5728\u4e00\u81f4\u6027\u5c42\u9762\u9009\u62e9\u4e86\u57fa\u4e8e quorum \u673a\u5236\u5e76\u4e14\u5f00\u6e90\u7684\u00a0<a href=\\\"https:\/\/github.com\/baidu\/braft\\\">braft<\/a>\uff0c\u4ece\u534f\u8bae\u5c42\u9762\u6765\u8bf4 quorum \u673a\u5236\u5728\u5ef6\u8fdf\u65b9\u9762\u5929\u751f\u4f18\u4e8e\u591a\u526f\u672c\u5f3a\u4e00\u81f4\u7684\u65b9\u5f0f\u3002\u5b9e\u73b0\u4e0a CURVE \u5bf9 braft \u5feb\u7167\u7684\u5b9e\u73b0\u8fdb\u884c\u4e86\u4f18\u5316\uff0c\u5728\u72b6\u6001\u673a\u7684\u5b9e\u73b0\u4e0a\u91c7\u7528 chunkfilepool \u7684\u65b9\u5f0f ( \u521d\u59cb\u5316\u96c6\u7fa4\u7684\u65f6\u5019\u683c\u5f0f\u5316\u51fa\u6307\u5b9a\u6bd4\u4f8b\u7684\u7a7a\u95f4\u7528\u4f5c chunk ) \u4f7f\u5f97\u5e95\u5c42\u7684\u5199\u5165\u653e\u5927\u4e3a 0\uff1b\u6b64\u5916CURVE \u8fd8\u5728 chunk \u4e0a\u8fdb\u884c\u66f4\u7ec6\u529b\u5ea6\u7684\u5730\u5740\u7a7a\u95f4 hash \u4ee5\u8fbe\u5230\u8bfb\u5199\u5206\u79bb\u3001\u51cf\u5c0f IO \u78b0\u649e\u7b49\u7684\u6548\u679c\uff0c\u4ece\u800c\u8fdb\u4e00\u6b65\u63d0\u5347 IO \u6027\u80fd\u3002<\/p>\n<h4>2. \u9ad8\u53ef\u7528<\/h4>\n<p>\u9ad8\u53ef\u7528\u662f CURVE \u7684\u53e6\u4e00\u5927\u7279\u70b9\u3002MDS\u3001ChunkServer \u4ee5\u53ca SnapShotCloneServer \u90fd\u652f\u6301\u591a\u5b9e\u4f8b\u90e8\u7f72\uff0c\u90e8\u5206\u5b9e\u4f8b\u5f02\u5e38\u4e0d\u5f71\u54cd\u6574\u4e2a\u96c6\u7fa4\u7684\u53ef\u7528\u6027\u3002<\/p>\n<ul>\n<li><strong>MDS<\/strong><br \/>\nMDS \u662f\u65e0\u72b6\u6001\u7684\uff0c\u63a8\u8350\u81f3\u5c11\u90e8\u7f72\u4e24\u4e2a\u5b9e\u4f8b\u3002\u901a\u8fc7 Etcd \u8fdb\u884c\u9009\u4e3b\u3002\u591a\u4e2a MDS \u5b9e\u4f8b\u901a\u8fc7 Etcd \u8fdb\u884c\u9009\u4e3b\uff0c\u5f53\u5355\u4e2a\u5b9e\u4f8b\u5931\u6548\u65f6\uff0c\u53ef\u4ee5\u79d2\u7ea7\u5207\u6362\u5230\u53e6\u5916\u4e00\u4e2a\u5b9e\u4f8b\u3002\u5931\u6548\u5b9e\u4f8b\u4e0a\u6b63\u5728\u5904\u7406\u7684\u8bf7\u6c42\uff0cClient \u548c SnapShotCloneServer \u90fd\u4f1a\u5bf9\u5176\u8fdb\u884c\u91cd\u8bd5\uff0c\u4ee5\u8fbe\u5230\u4e0d\u5f71\u54cd\u96c6\u7fa4\u53ef\u7528\u6027\u7684\u6548\u679c\u3002<\/li>\n<li><strong>SnapShotCloneServer<\/strong><br \/>\nSnapShotCloneServer \u4e0e MDS \u7c7b\u4f3c, \u4e5f\u662f\u901a\u8fc7 Etcd \u8fdb\u884c\u9009\u4e3b\uff0c\u4e0d\u540c\u7684\u662f\uff0c\u5b83\u901a\u8fc7\u8d1f\u8f7d\u5747\u8861\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\u3002\u5931\u6548\u671f\u95f4\u7684\u8bf7\u6c42\u5931\u8d25\u91cd\u8bd5\u90fd\u662f\u5e42\u7b49\u7684\uff0c\u4e0d\u5f71\u54cd\u4efb\u52a1\u7684\u6b63\u786e\u6027\u4ee5\u53ca\u96c6\u7fa4\u7684\u53ef\u7528\u6027\u3002<\/li>\n<li><strong>ChunkServer<\/strong><br \/>\nChunkServer \u662f\u4e00\u4e2a\u96c6\u7fa4\uff0c\u901a\u8fc7 Raft \u534f\u8bae\u4fdd\u6301\u6570\u636e\u4e00\u81f4\u6027\uff0c\u5e76\u901a\u8fc7 MDS \u505a\u8d1f\u8f7d\u5747\u8861\u3002\u5355\u4e2a\u8282\u70b9\u5931\u6548\u65f6\uff0c\u4f1a\u5f71\u54cd\u5230\u8fd9\u4e2a\u8282\u70b9\u4e0a\u5b58\u50a8\u7684\u6240\u6709 Copyset\u3002\u5bf9\u4e8e Copyset \u4e0a\u7684 Leader \u8282\u70b9\uff0c\u4f1a\u4e2d\u65ad\u670d\u52a1\uff0c\u7b49\u5f85\u91cd\u65b0\u9009\u4e3e\uff1b\u5bf9\u4e8eCopyset \u4e0a\u7684 follower \u8282\u70b9\uff0c\u670d\u52a1\u4e0d\u4f1a\u53d7\u5f71\u54cd\u3002\u5f53\u67d0\u4e2a Chunkserver \u8282\u70b9\u5931\u6548\u4e14\u5728\u4e00\u6bb5\u65f6\u95f4\u5185\u65e0\u6cd5\u6062\u590d\uff0cMDS \u4f1a\u5c06\u5176\u4e0a\u7684\u6570\u636e\u8fc1\u79fb\u5230\u5176\u4ed6\u8282\u70b9\u4e0a\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>CURVE \u662f\u7f51\u6613\u5f00\u6e90\u7684\u9ad8\u6027\u80fd\u3001\u9ad8\u53ef\u7528\u3001\u9ad8\u53ef\u9760\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf\uff0c\u5177\u6709\u975e\u5e38\u826f\u597d\u7684\u6269\u5c55\u6027\u3002\u57fa\u4e8e\u8be5\u5b58\u50a8\u5e95\u5ea7\u53ef\u4ee5\u6253\u9020\u9002\u7528 &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=1918\"> <span class=\"screen-reader-text\">\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf Curve\u4ecb\u7ecd<\/span> \u67e5\u770b\u5168\u6587 &raquo;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[141,142],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"CURVE \u662f\u7f51\u6613\u5f00\u6e90\u7684\u9ad8\u6027\u80fd\u3001\u9ad8\u53ef\u7528\u3001\u9ad8\u53ef\u9760\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf\uff0c\u5177\u6709\u975e\u5e38\u826f\u597d\u7684\u6269\u5c55\u6027\u3002\u57fa\u4e8e\u8be5\u5b58\u50a8\u5e95\u5ea7\u53ef\u4ee5\u6253\u9020\u9002\u7528&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1918"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1918"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1918\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1918"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1918"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}