{"id":1127,"date":"2026-01-01T08:51:32","date_gmt":"2026-01-01T00:51:32","guid":{"rendered":"https:\/\/www.52runoob.com\/?p=1127"},"modified":"2026-01-01T08:51:32","modified_gmt":"2026-01-01T00:51:32","slug":"blsm-a-general-purpose-log-structured-merge-tree","status":"publish","type":"post","link":"https:\/\/www.52runoob.com\/index.php\/2026\/01\/01\/blsm-a-general-purpose-log-structured-merge-tree\/","title":{"rendered":"bLSM: A General Purpose Log Structured Merge Tree"},"content":{"rendered":"\n<p><strong>bLSM: A General Purpose Log Structured Merge Tree<\/strong> \u662f\u4e00\u79cd <strong>LSM\uff08Log\u2011Structured Merge Tree\uff09\u6811\u7684\u6539\u8fdb\u53d8\u4f53<\/strong>\uff0c\u65e8\u5728\u5728\u4fdd\u6301\u5199\u5165\u9ad8\u541e\u5410\u7684\u540c\u65f6\uff0c\u663e\u8457\u6539\u5584 <strong>\u8bfb\u53d6\u548c\u626b\u63cf\u6027\u80fd<\/strong>\uff0c\u5e76\u4f18\u5316\u5408\u5e76\u8c03\u5ea6\uff0c\u4ece\u800c\u5728\u5b9e\u9645\u5b58\u50a8\u7cfb\u7edf\u4e2d\u6bd4\u4f20\u7edf LSM \u6216 B\u2011Tree \u66f4\u5e73\u8861\u5730\u5904\u7406\u6df7\u5408\u5de5\u4f5c\u8d1f\u8f7d\u3002(<a href=\"https:\/\/medium.com\/%40balrajasubbiah\/blsm-a-general-purpose-log-structured-merge-tree-e69d23ad0cd0?utm_source=chatgpt.com\">Medium<\/a>)<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udccc 1. \u80cc\u666f\uff1aLSM\u2011Tree \u7b80\u8981\u56de\u987e<\/h2>\n\n\n\n<p>LSM \u6811\u662f\u4e00\u79cd\u9762\u5411 <strong>\u5199\u5bc6\u96c6\u578b\u5b58\u50a8\u7cfb\u7edf<\/strong> \u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u901a\u8fc7\u5c06\u5199\u5165\u64cd\u4f5c\u7f13\u5b58\u5728\u5185\u5b58\uff0c\u7136\u540e\u6309\u6279\u987a\u5e8f\u5199\u5165\u78c1\u76d8\uff0c\u518d\u901a\u8fc7 <strong>\u540e\u53f0\u5408\u5e76\uff08compaction\uff09<\/strong> \u4fdd\u6301\u5404\u5c42\u6570\u636e\u6709\u5e8f\uff0c\u4ece\u800c\u6781\u5927\u51cf\u5c11\u968f\u673a\u78c1\u76d8\u5199\u64cd\u4f5c\u3002(<a href=\"https:\/\/en.wikipedia.org\/wiki\/Log-structured_merge-tree?utm_source=chatgpt.com\">\u7ef4\u57fa\u767e\u79d1<\/a>)<\/p>\n\n\n\n<p>\u5178\u578b\u7684 LSM \u7ed3\u6784\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5185\u5b58\u5c42\uff08C0\uff09<\/strong>\uff1a\u5feb\u901f\u63a5\u53d7\u5199\u5165<\/li>\n\n\n\n<li><strong>\u78c1\u76d8\u5c42\uff08C1\u3001C2\u2026\uff09<\/strong>\uff1a\u901a\u8fc7\u5408\u5e76\u4fdd\u6301\u6709\u5e8f\u3001\u51cf\u5c11\u5197\u4f59<\/li>\n\n\n\n<li>\u53ef\u9009 <strong>Bloom \u8fc7\u6ee4\u5668<\/strong> \u7528\u4e8e\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u78c1\u76d8\u67e5\u627e(<a href=\"https:\/\/en.wikipedia.org\/wiki\/Log-structured_merge-tree?utm_source=chatgpt.com\">\u7ef4\u57fa\u767e\u79d1<\/a>)<\/li>\n<\/ul>\n\n\n\n<p>LSM \u6811\u5728\u5927\u89c4\u6a21\u952e\u503c\u5b58\u50a8\uff08\u5982 Cassandra\u3001RocksDB \u7b49\uff09\u975e\u5e38\u5e38\u89c1\uff0c\u56e0\u4e3a\u5b83\u80fd\u663e\u8457\u63d0\u9ad8\u5199\u6027\u80fd\u3002(<a href=\"https:\/\/lukeolney.me\/readings\/log-structured-merge-trees\/?utm_source=chatgpt.com\">Luke Olney<\/a>)<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udccc 2. bLSM \u7684\u6838\u5fc3\u52a8\u673a\u4e0e\u8d21\u732e<\/h2>\n\n\n\n<p>bLSM \u662f\u7531 Russell Sears \u548c Raghu Ramakrishnan\uff08Yahoo&nbsp;Research\uff09\u63d0\u51fa\u7684 <strong>\u9488\u5bf9 LSM \u6811\u7684\u4e00\u79cd\u589e\u5f3a\u7ed3\u6784<\/strong>\uff0c\u4e3b\u8981\u76ee\u6807\u662f\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 \u66f4\u597d\u7684 <strong>\u8bfb\u53d6\u6027\u80fd\u548c\u626b\u63cf\u6027\u80fd<\/strong><\/h3>\n\n\n\n<p>\u4f20\u7edf LSM \u5728\u5199\u5165\u53cb\u597d\u4f46\u53ef\u80fd\u9762\u4e34\u8f83\u9ad8\u7684\u8bfb\u53d6\u5ef6\u8fdf\u548c\u626b\u63cf\u6210\u672c\u3002bLSM \u901a\u8fc7\u7ea6\u675f on\u2011disk \u7ec4\u4ef6\u6570\u91cf\u4ee5\u53ca\u5f15\u5165\u66f4\u9ad8\u6548\u7684\u5408\u5e76\u8c03\u5ea6\uff0c\u4f7f\u5f97 <strong>\u67e5\u627e\u548c\u626b\u63cf\u4e0d\u81f3\u4e8e\u88ab\u8fc7\u591a\u5c42\u7ea7\u81a8\u80c0\u62d6\u6162<\/strong>\u3002(<a href=\"https:\/\/blog.csdn.net\/duxingxia356\/article\/details\/102337106?utm_source=chatgpt.com\">CSDN<\/a>)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 \u5f15\u5165\u66f4\u667a\u80fd\u7684 <strong>\u5408\u5e76\u8c03\u5ea6\u5668<\/strong><\/h3>\n\n\n\n<p>bLSM \u63d0\u51fa\u4e86\u4e00\u79cd\u79f0\u4e3a <strong>\u201cSpring and Gear Scheduler\u201d\uff08\u5f39\u7c27\u4e0e\u9f7f\u8f6e\u8c03\u5ea6\u5668\uff09<\/strong> \u7684\u673a\u5236\uff0c\u7528\u4e8e\u63a7\u5236\u4e0d\u540c\u5c42\u4e4b\u95f4\u7684\u5408\u5e76\u65f6\u673a\u548c\u8fdb\u5ea6\uff0c\u4f7f\u5199\u5165\u5ef6\u8fdf\u53ef\u63a7\u800c\u4e0d\u4f1a\u5f71\u54cd\u603b\u4f53\u541e\u5410\u3002(<a href=\"https:\/\/blog.csdn.net\/duxingxia356\/article\/details\/102337106?utm_source=chatgpt.com\">CSDN<\/a>)<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udccc 3. bLSM \u7684\u8bbe\u8ba1\u7279\u70b9\u7b80\u4ecb<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 \u4e09\u5c42 LSM \u7ed3\u6784<\/h3>\n\n\n\n<p>bLSM \u901a\u5e38\u91c7\u7528<strong>\u4e09\u5c42 LSM \u6811<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>C0<\/strong>\uff1a\u5185\u5b58\u5c42\uff0c\u5feb\u901f\u5199\u5165<\/li>\n\n\n\n<li><strong>C1 \/ C2<\/strong>\uff1a\u78c1\u76d8\u5c42\uff0c\u53d7 Bloom \u8fc7\u6ee4\u5668\u4fdd\u62a4\uff08Bloom filter \u7528\u4e8e\u51cf\u5c11\u4e0d\u5fc5\u8981\u8bfb\u53d6\uff09(<a href=\"https:\/\/medium.com\/%40balrajasubbiah\/blsm-a-general-purpose-log-structured-merge-tree-e69d23ad0cd0?utm_source=chatgpt.com\">Medium<\/a>)<\/li>\n<\/ul>\n\n\n\n<p>\u9650\u5236 on\u2011disk \u5c42\u6570\u91cf\u53ef\u4ee5\u51cf\u5c11\u6bcf\u6b21\u67e5\u627e\u65f6\u9700\u8981\u8bbf\u95ee\u591a\u4e2a\u5c42\u7684\u6210\u672c\uff0c\u4ece\u800c\u51cf\u5c11 <strong>\u8bfb\u53d6\u653e\u5927\uff08read amplification\uff09<\/strong>\u3002(<a href=\"https:\/\/blog.csdn.net\/duxingxia356\/article\/details\/102337106?utm_source=chatgpt.com\">CSDN<\/a>)<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 \u201cSpring and Gear\u201d \u5408\u5e76\u8c03\u5ea6\u5668<\/h3>\n\n\n\n<p>\u5408\u5e76\u8c03\u5ea6\u5668\u7684\u6838\u5fc3\u601d\u60f3\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u901a\u8fc7\u5c06\u4e0d\u540c\u5c42\u7684\u5408\u5e76\u64cd\u4f5c <strong>\u540c\u6b65\u8c03\u5ea6<\/strong>\uff0c\u907f\u514d\u51fa\u73b0\u5199\u505c\u987f\uff08write stall\uff09<\/li>\n\n\n\n<li>\u91c7\u7528\u7c7b\u4f3c\u65f6\u949f\u9f7f\u8f6e\u7684\u673a\u5236\u8ba9\u591a\u6b21\u8f83\u5c0f\u5c42\u5408\u5e76\u914d\u5408\u5c11\u6b21\u6570\u8f83\u5927\u5c42\u5408\u5e76\uff0c\u4ee5\u5e73\u8861\u5199\u5165\u4e0e\u5408\u5e76\u7684\u534f\u540c\u8fdb\u5ea6<\/li>\n\n\n\n<li>\u786e\u4fdd\u5408\u5e76\u4e0e\u586b\u5145\u8fc7\u7a0b\u4e4b\u95f4\u4fdd\u6301\u8282\u594f\u4e00\u81f4\uff0c\u4ece\u800c\u63d0\u9ad8\u6574\u4f53\u7cfb\u7edf\u54cd\u5e94\u7a33\u5b9a\u6027(<a href=\"https:\/\/blog.csdn.net\/duxingxia356\/article\/details\/102337106?utm_source=chatgpt.com\">CSDN<\/a>)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udccc 4. bLSM \u7684\u6027\u80fd\u4e0e\u4f18\u70b9<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u8bbe\u8ba1\u76ee\u6807<\/th><th>\u4f20\u7edf LSM \u6811<\/th><th>bLSM<\/th><\/tr><\/thead><tbody><tr><td><strong>\u5199\u5165\u541e\u5410<\/strong><\/td><td>\u9ad8<\/td><td>\u4fdd\u6301\u9ad8<\/td><\/tr><tr><td><strong>\u5199\u5ef6\u8fdf\u6296\u52a8<\/strong><\/td><td>\u53ef\u80fd\u8f83\u5927<\/td><td>\u9650\u5236\u4e8e\u53ef\u63a7\u8303\u56f4<\/td><\/tr><tr><td><strong>\u8bfb\u53d6\u653e\u5927<\/strong><\/td><td>\u504f\u9ad8<\/td><td>\u964d\u4f4e<\/td><\/tr><tr><td><strong>\u626b\u63cf\u6027\u80fd<\/strong><\/td><td>\u53d7\u5c42\u6570\u5f71\u54cd<\/td><td>\u66f4\u4f18<\/td><\/tr><tr><td><strong>\u5408\u5e76\u8c03\u5ea6<\/strong><\/td><td>\u7b80\u5355\u6216\u65e0\u8c03\u5ea6<\/td><td>\u9ad8\u7ea7\u8c03\u5ea6\u652f\u6301<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udccc 5. \u4e0e\u4f20\u7edf LSM \u7684\u5bf9\u6bd4<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u8bfb\u53d6\u653e\u5927<\/strong>\uff1abLSM \u5728\u8bbe\u8ba1\u4e0a\u66f4\u5173\u6ce8\u51cf\u5c11\u8bfb\u53d6\u65f6\u9700\u8981\u626b\u63cf\u7684\u5c42\u6570\u548c\u67e5\u627e\u6210\u672c\uff0c\u6539\u5584\u67e5\u8be2\u54cd\u5e94\u3002(<a href=\"https:\/\/blog.csdn.net\/duxingxia356\/article\/details\/102337106?utm_source=chatgpt.com\">CSDN<\/a>)<\/li>\n\n\n\n<li><strong>\u5408\u5e76\u673a\u5236<\/strong>\uff1a\u4f20\u7edf LSM \u66f4\u4f9d\u8d56\u7b80\u5355\u7684\u5408\u5e76\u7b56\u7565\uff0c\u800c bLSM \u7684\u8c03\u5ea6\u673a\u5236\u4f7f\u5199\u5165\u4e0e\u5408\u5e76\u4e4b\u95f4\u66f4\u67d4\u548c\u5730\u534f\u8c03\u3002(<a href=\"https:\/\/blog.csdn.net\/duxingxia356\/article\/details\/102337106?utm_source=chatgpt.com\">CSDN<\/a>)<\/li>\n\n\n\n<li><strong>Bloom \u8fc7\u6ee4\u5668<\/strong>\uff1a\u4e8c\u8005\u90fd\u4f1a\u4f7f\u7528 Bloom \u8fc7\u6ee4\u5668\u6765\u51cf\u5c11\u65e0\u6548\u67e5\u627e\uff0c\u4f46 bLSM \u66f4\u5f3a\u8c03\u5c06\u8fc7\u6ee4\u5668\u4e0e\u5408\u5e76\u673a\u5236\u7ed3\u5408\u4f18\u5316\u67e5\u8be2\u3002(<a href=\"https:\/\/medium.com\/%40balrajasubbiah\/blsm-a-general-purpose-log-structured-merge-tree-e69d23ad0cd0?utm_source=chatgpt.com\">Medium<\/a>)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udccc 6. \u9002\u7528\u573a\u666f<\/h2>\n\n\n\n<p>bLSM \u7279\u522b\u9002\u5408 <strong>\u5199\u5bc6\u96c6\u4e14\u9700\u8981\u4f4e\u5ef6\u8fdf\u8bfb\/\u626b\u63cf\u8868\u73b0\u7684\u7cfb\u7edf<\/strong>\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9ad8\u541e\u5410\u65e5\u5fd7\u5b58\u50a8\u7cfb\u7edf<\/li>\n\n\n\n<li>\u65f6\u5e8f\u6570\u636e\u5b58\u50a8<\/li>\n\n\n\n<li>\u5927\u89c4\u6a21\u952e\u503c\u5b58\u50a8\u670d\u52a1<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udccc \u603b\u7ed3<\/h2>\n\n\n\n<p><strong>bLSM \u662f\u4e00\u79cd\u4f18\u5316\u8fc7\u7684 LSM \u6811\u7ed3\u6784<\/strong>\uff0c\u5728\u4f20\u7edf LSM \u7684\u57fa\u7840\u4e0a\uff1a<\/p>\n\n\n\n<p>\ud83d\udccc \u9650\u5236 on\u2011disk \u7ec4\u4ef6\u6570\u91cf<br>\ud83d\udccc \u5f15\u5165\u9ad8\u7ea7\u5408\u5e76\u8c03\u5ea6\u5668\uff08Spring &amp; Gear\uff09<br>\ud83d\udccc \u66f4\u5173\u6ce8\u8bfb\u53d6\u6027\u80fd\u4e0e\u5ef6\u8fdf\u7a33\u5b9a\u6027<\/p>\n\n\n\n<p>\u4ece\u800c\u5728\u8bb8\u591a\u5b9e\u9645\u5b58\u50a8\u5e94\u7528\u4e2d\u8868\u73b0\u51fa\u6bd4\u6807\u51c6 LSM \u548c\u67d0\u4e9b B\u2011Tree \u5b9e\u73b0\u66f4\u4f18\u7684\u6027\u80fd\u5e73\u8861\u3002(<a href=\"https:\/\/medium.com\/%40balrajasubbiah\/blsm-a-general-purpose-log-structured-merge-tree-e69d23ad0cd0?utm_source=chatgpt.com\">Medium<\/a>)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>bLSM: A General Purpose Log Structured M&#8230; <a class=\"more-link\" href=\"https:\/\/www.52runoob.com\/index.php\/2026\/01\/01\/blsm-a-general-purpose-log-structured-merge-tree\/\">Continue Reading &rarr;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-1127","post","type-post","status-publish","format-standard","hentry","category-12"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/1127","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/comments?post=1127"}],"version-history":[{"count":1,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/1127\/revisions"}],"predecessor-version":[{"id":1128,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/1127\/revisions\/1128"}],"wp:attachment":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/media?parent=1127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/categories?post=1127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/tags?post=1127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}