{"id":123482,"date":"2026-11-07T12:56:53","date_gmt":"2026-11-07T04:56:53","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/123482.html"},"modified":"2026-11-07T12:56:53","modified_gmt":"2026-11-07T04:56:53","slug":"%e6%95%b0%e6%8d%ae%e5%ba%93%e5%86%99%e5%be%97%e5%a4%aa%e6%85%a2%ef%bc%9f%e4%b8%8d%e6%98%af%e7%a3%81%e7%9b%98%e7%9a%84%e9%94%85%ef%bc%8c%e6%98%af%e4%bd%a0%e5%9c%a8%e9%9a%8f%e6%9c%ba%e5%86%99","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/123482.html","title":{"rendered":"\u6570\u636e\u5e93\u5199\u5f97\u592a\u6162\uff1f\u4e0d\u662f\u78c1\u76d8\u7684\u9505\uff0c\u662f\u4f60\u5728\u201c\u968f\u673a\u5199\u201c\u2014\u2014LSM-Tree \u7528\u5199\u653e\u5927\u6362\u5199\u541e\u5410\u7684\u8d26\u672c"},"content":{"rendered":"

\/* MD \/ \u5bcc\u6587\u672c\u4e2d\u7684 .toc\uff08\u542b\u535a\u5ba2\u56ed\u642c\u5bb6\u7b49\u5d4c\u5957\u7ed3\u6784\uff09\uff1b.toc-box \u5728\u4fa7\u680f\uff0c\u4e0d\u53d7\u5f71\u54cd *\/
\n #content_views .toc,
\n \/* \u7f16\u8f91\u5668\u5e38\u5728\u76ee\u5f55\u524d\u540e\u63d2\u5165\u7a7a p\uff08:empty \u4ecd\u5360 20px\uff09\uff0c\u4e00\u5e76\u53bb\u6389\u907f\u514d\u9876\u7a7a\u9699 *\/
\n #content_views.markdown_views > p:empty:has(+ .toc),
\n #content_views.markdown_views > .toc + p:empty,
\n \/* \u5bcc\u6587\u672c\u65e7\u7248\u76ee\u5f55\u6807\u8bb0 *\/
\n #content_views.htmledit_views #main-toc,
\n #content_views.htmledit_views #hr-toc,
\n #content_views.htmledit_views p[id*=\\”-toc\\”] {
\n display: none !important;
\n }
\n \/* \u76ee\u5f55\u53bb\u6389\u540e\uff0c\u7d27\u8ddf\u7684\u9996\u4e2a\u6807\u9898\u4e0d\u518d\u591a\u51fa\u4e00\u5757\u4e0a\u8fb9\u8ddd *\/
\n #content_views.markdown_views > .toc + h1,
\n #content_views.markdown_views > .toc + h2,
\n #content_views.markdown_views > .toc + h3,
\n #content_views.markdown_views > .toc + h4,
\n #content_views.markdown_views > .toc + p:empty + h1,
\n #content_views.markdown_views > .toc + p:empty + h2,
\n #content_views.markdown_views > .toc + p:empty + h3,
\n #content_views.markdown_views > .toc + p:empty + h4 {
\n margin-top: 0 !important;
\n }<\/p>\n

\u6570\u636e\u5e93\u5199\u5f97\u592a\u6162？\u4e0d\u662f\u78c1\u76d8\u7684\u9505，\u662f\u4f60\u5728"\u968f\u673a\u5199"\u2014\u2014LSM-Tree \u7528\u5199\u653e\u5927\u6362\u5199\u541e\u5410\u7684\u8d26\u672c<\/h2>\n

\u5148\u8bb2\u4e00\u4e2a\u770b\u8d77\u6765\u77db\u76fe\u7684\u73b0\u8c61：\u540c\u6837\u662f\u5f80\u78c1\u76d8\u4e0a\u5199 1 GB \u6570\u636e，\u987a\u5e8f\u5199\u80fd\u8dd1\u5230\u6bcf\u79d2\u51e0\u767e MB，\u53ef\u4f60\u8981\u662f\u968f\u673a\u5730\u4e1c\u5199\u4e00\u5757\u3001\u897f\u5199\u4e00\u5757，\u541e\u5410\u80fd\u6389\u4e24\u4e2a\u6570\u91cf\u7ea7\u3002\u8fd9\u4e0d\u662f\u7384\u5b66，\u662f\u78c1\u76d8\u7684\u7269\u7406\u813e\u6c14\u3002<\/p>\n

\u95ee\u9898\u6765\u4e86：\u6570\u636e\u5e93\u7d22\u5f15\u5929\u751f\u662f"\u968f\u673a"\u7684\u2014\u2014\u65b0\u63d2\u5165\u7684 key \u843d\u5728 B+ \u6811\u7684\u54ea\u4e2a\u53f6\u5b50\u9875，\u5f97\u9760\u67e5\u627e\u624d\u77e5\u9053，\u800c\u67e5\u627e\u8981\u5bfb\u9053\u3002\u4e8e\u662f\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u5199\u5165，\u4e00\u76f4\u662f\u80cc\u7740"\u968f\u673a I\/O"\u8fd9\u4e2a\u5305\u88b1\u5728\u8dd1\u3002<\/p>\n

\u6709\u4e00\u7c7b\u5b58\u50a8\u5f15\u64ce\u5e72\u8106\u6380\u4e86\u684c\u5b50：\u6211\u5168\u987a\u5e8f\u5199，\u968f\u673a\u7684\u4e8b\u4ea4\u7ed9\u540e\u53f0\u6162\u6162\u6536\u62fe\u3002\u8fd9\u5c31\u662f LSM-Tree（Log-Structured Merge-Tree，\u65e5\u5fd7\u7ed3\u6784\u5408\u5e76\u6811）\u3002LevelDB\u3001RocksDB\u3001Cassandra\u3001HBase，\u5168\u662f\u8fd9\u4e2a\u601d\u8def\u3002<\/p>\n

\u4e3a\u4ec0\u4e48\u968f\u673a\u5199\u6162\u3001\u987a\u5e8f\u5199\u5feb<\/h3>\n

\u673a\u68b0\u786c\u76d8（HDD）\u5199\u5165\u524d，\u78c1\u5934\u8981\u5148"\u5bfb\u9053"（seek）\u5230\u76ee\u6807\u78c1\u9053，\u518d\u7b49\u76d8\u7247\u8f6c\u5230\u6b63\u786e\u6247\u533a（rotational latency）\u3002\u4e00\u6b21\u968f\u673a\u5199，\u5927\u5934\u7684\u65f6\u95f4\u82b1\u5728\u8fd9\u4e24\u4e2a\u673a\u68b0\u52a8\u4f5c\u4e0a\u3002\u987a\u5e8f\u5199\u5219\u662f\u4e00\u6b21\u5bfb\u9053\u3001\u4e00\u8def\u5f80\u4e0b\u5237，\u78c1\u5934\u51e0\u4e4e\u4e0d\u7528\u52a8\u3002<\/p>\n

\u56fa\u6001\u786c\u76d8（SSD）\u6ca1\u6709\u673a\u68b0\u52a8\u4f5c，\u4f46\u5b83\u6709\u81ea\u5df1\u7684\u5751：\u5199\u4e4b\u524d\u8981\u5148\u64e6\u9664\u6574\u5757，\u800c\u4e14\u6709"\u5199\u653e\u5927"\u2014\u2014\u5199 4 KB \u7684\u903b\u8f91\u6570\u636e，\u5e95\u5c42\u53ef\u80fd\u8981\u64e6\u5199\u4e00\u4e2a 256 KB \u7684\u5757\u3002\u4e71\u5e8f\u7684\u5c0f\u5757\u968f\u673a\u5199，\u4f1a\u628a SSD \u7684\u64e6\u9664\u641e\u5f97\u9891\u7e41\u53c8\u6d6a\u8d39，\u5bff\u547d\u548c\u6027\u80fd\u4e00\u8d77\u6389\u3002<\/p>\n

\u6240\u4ee5\u65e0\u8bba HDD \u8fd8\u662f SSD，\u628a\u968f\u673a\u5199\u53d8\u6210\u987a\u5e8f\u5199，\u90fd\u662f\u5b9e\u6253\u5b9e\u7684\u4f18\u5316\u3002<\/p>\n

B+ \u6811\u7684\u56f0\u5883<\/h3>\n

\u5173\u7cfb\u578b\u6570\u636e\u5e93（MySQL InnoDB \u7b49）\u7528 B+ \u6811\u505a\u7d22\u5f15，\u8bfb\u5f88\u5feb：\u6811\u9ad8\u5f88\u4f4e，3 \u5c42\u5c31\u80fd\u7d22\u5f15\u4e0a\u4ebf\u6761\u6570\u636e，\u4e00\u6b21\u70b9\u67e5\u51e0\u6b21\u78c1\u76d8 IO \u5c31\u5230\u53f6\u5b50\u9875\u3002\u4f46\u5199\u5c31\u6ca1\u90a3\u4e48\u723d\u4e86：<\/p>\n

  • \u63d2\u5165\u4e00\u4e2a key，\u8981\u5148\u627e\u5230\u5b83\u8be5\u53bb\u7684\u53f6\u5b50\u9875\u2014\u2014\u8fd9\u662f\u968f\u673a\u8bfb\u3002<\/li>\n
  • \u53f6\u5b50\u9875\u6ee1\u4e86\u8981\u5206\u88c2，\u53ef\u80fd\u4e00\u8def\u5206\u88c2\u5230\u6839\u2014\u2014\u53c8\u662f\u4e00\u5806\u968f\u673a\u5199\u3002<\/li>\n

    B+ \u6811\u662f"\u8bfb\u4f18\u5316"\u7684\u7ed3\u6784，\u5b83\u628a\u5199\u5165\u7684\u6210\u672c\u644a\u5728\u4e86\u4e00\u6b21\u6b21\u7684\u968f\u673a I\/O \u4e0a\u3002\u8bfb\u591a\u5199\u5c11\u7684 OLTP \u573a\u666f\u65e0\u6240\u8c13，\u4f46\u9047\u5230\u5199\u591a\u8bfb\u5c11\u7684\u8d1f\u8f7d\u2014\u2014\u65e5\u5fd7\u3001\u65f6\u5e8f\u6570\u636e\u3001\u6d88\u606f\u6d41\u3001\u57cb\u70b9\u2014\u2014B+ \u6811\u5c31\u9876\u4e0d\u4f4f\u4e86\u3002<\/p>\n

    LSM \u7684\u6838\u5fc3：\u5199\u5185\u5b58，\u7136\u540e\u987a\u5e8f\u5237\u76d8<\/h3>\n

    LSM-Tree \u6362\u4e86\u4e2a\u601d\u8def，\u628a\u5199\u5165\u62c6\u6210\u4e24\u6bb5：<\/p>\n

    \u7b2c\u4e00\u6bb5，\u5199\u5185\u5b58\u3002 \u65b0\u5199\u5165\u5148\u8fdb\u4e00\u4e2a\u5185\u5b58\u91cc\u7684\u6709\u5e8f\u7ed3\u6784 MemTable（\u4e00\u822c\u662f\u8df3\u8868\u6216\u7ea2\u9ed1\u6811）\u3002\u540c\u65f6\u4e3a\u4e86\u9632\u5b95\u673a\u4e22\u6570\u636e，\u5148\u987a\u5e8f\u8ffd\u52a0\u5230 WAL（\u9884\u5199\u65e5\u5fd7）\u2014\u2014\u6ce8\u610f\u8fd9\u4e2a\u8ffd\u52a0\u4e5f\u662f\u987a\u5e8f\u5199\u3002\u5230\u8fd9\u91cc，\u5199\u5165\u7684"\u70ed\u8def\u5f84"\u5c31\u7ed3\u675f\u4e86，\u901f\u5ea6\u6781\u5feb\u3002<\/p>\n

    \u7b2c\u4e8c\u6bb5，\u5237\u76d8\u3002 \u7b49 MemTable \u6da8\u5230\u4e00\u5b9a\u5927\u5c0f（\u6bd4\u5982 64 MB），\u628a\u5b83\u6574\u4e2a\u987a\u5e8f\u5199\u6210\u4e00\u4e2a\u4e0d\u53ef\u53d8\u7684\u6587\u4ef6，\u53eb SSTable（Sorted String Table）\u3002\u56e0\u4e3a MemTable \u91cc\u672c\u6765\u5c31\u662f\u6709\u5e8f\u7684，\u76f4\u63a5\u987a\u5e8f\u5237\u51fa\u53bb\u5c31\u884c，\u78c1\u76d8\u5168\u7a0b\u4e0d\u7528\u5bfb\u9053\u3002<\/p>\n

    \u770b\u51fa\u6765\u6ca1\u6709：\u5199\u5165\u8def\u5f84\u4e0a\u6ca1\u6709\u4efb\u4f55\u968f\u673a I\/O\u3002\u8fd9\u5c31\u662f LSM \u5199\u541e\u5410\u9ad8\u7684\u5168\u90e8\u79d8\u5bc6\u2014\u2014\u628a\u968f\u673a\u5199\u5ef6\u540e\u3001\u8f6c\u6362\u6210\u987a\u5e8f\u5199\u3002<\/p>\n

    \u8bfb\u600e\u4e48\u529e：\u591a\u67e5\u51e0\u4e2a\u6587\u4ef6，\u62ff\u5e03\u9686\u8fc7\u6ee4\u5668\u515c\u5e95<\/h3>\n

    \u5929\u4e0b\u6ca1\u6709\u514d\u8d39\u7684\u5348\u9910\u3002\u65e2\u7136\u6570\u636e\u6563\u843d\u5728"\u4e00\u4e2a MemTable + \u82e5\u5e72 SSTable"\u91cc，\u8bfb\u4e00\u4e2a key \u5c31\u5f97\u6328\u4e2a\u627e：\u5148\u67e5 MemTable，\u518d\u6309\u65b0\u65e7\u987a\u5e8f\u67e5\u6bcf\u4e2a SSTable\u3002SSTable \u8d8a\u591a，\u8bfb\u8d8a\u6162\u3002\u8fd9\u5c31\u662f \u8bfb\u653e\u5927（read amplification）\u3002<\/p>\n

    \u4e24\u4e2a\u624b\u6bb5\u7f13\u89e3：<\/p>\n

      \n
    • \u6bcf\u4e2a SSTable \u81ea\u5e26\u7d22\u5f15（\u7a00\u758f\u7d22\u5f15 + \u5e03\u9686\u8fc7\u6ee4\u5668）\u3002\u5e03\u9686\u8fc7\u6ee4\u5668\u80fd\u5728 O(1) \u65f6\u95f4\u544a\u8bc9\u4f60"\u8fd9\u4e2a key \u5927\u6982\u7387\u4e0d\u5728\u8fd9\u5757\u6587\u4ef6\u91cc"，\u628a\u7edd\u5927\u591a\u6570\u65e0\u6548\u67e5\u8be2\u76f4\u63a5\u6321\u6389，\u907f\u514d\u7ffb\u904d\u6240\u6709 SSTable\u3002<\/li>\n
    • \u5408\u5e76（compaction）：\u540e\u53f0\u7ebf\u7a0b\u628a\u591a\u4e2a\u5c0f\u7684\u3001\u6709\u91cd\u53e0\u7684 SSTable \u5408\u5e76\u6210\u66f4\u5927\u7684\u3001\u6709\u5e8f\u7684 SSTable，\u628a\u540c\u4e00 key \u7684\u65e7\u7248\u672c\u6e05\u6389\u3002\u6587\u4ef6\u5c11\u4e86，\u8bfb\u653e\u5927\u5c31\u4e0b\u6765\u4e86\u3002<\/li>\n<\/ul>\n

      \u5e03\u9686\u8fc7\u6ee4\u5668\u8fd9\u6b65\u5f88\u5173\u952e\u3002LSM \u7684\u8bfb\u653e\u5927\u80fd\u4e0d\u80fd\u88ab\u63a5\u53d7，\u4e00\u534a\u9760 compaction，\u4e00\u534a\u9760\u5e03\u9686\u8fc7\u6ee4\u5668\u628a"\u4e0d\u5b58\u5728\u7684 key"\u8fd9\u79cd\u6700\u574f\u60c5\u51b5\u6321\u4f4f\u3002<\/p>\n

      Compaction \u7684\u4e24\u6761\u8def\u7ebf，\u548c\u90a3\u7b14\u8d26<\/h3>\n

      Compaction \u662f LSM \u6700\u5fae\u5999\u7684\u5de5\u7a0b\u51b3\u7b56，\u5206\u4e24\u5927\u6d41\u6d3e，\u5bf9\u5e94\u4e09\u79cd"\u653e\u5927"\u7684\u53d6\u820d\u3002<\/p>\n

      Tiered（\u5206\u5c42\u5e73\u94fa，Cassandra\u3001HBase）：\u540c\u4e00\u5c42\u5141\u8bb8\u6709\u591a\u4e2a SSTable，\u6512\u5230\u4e00\u5b9a\u6570\u91cf\u5c31\u628a\u5b83\u4eec\u5408\u5e76\u6210\u4e00\u4e2a\u66f4\u5927\u7684\u3002\u5199\u653e\u5927\u4f4e（\u6bcf\u6761\u6570\u636e\u5e73\u5747\u53ea\u88ab\u91cd\u5199\u51e0\u6b21），\u4f46\u8bfb\u653e\u5927\u9ad8（\u4e00\u5c42\u91cc\u4e00\u5806\u6587\u4ef6\u90fd\u8981\u67e5）\u3001\u7a7a\u95f4\u653e\u5927\u9ad8（\u65e7\u7248\u672c\u6e05\u7406\u4e0d\u53ca\u65f6）\u3002<\/p>\n

      Leveled（\u5c42\u7ea7\u91d1\u5b57\u5854，LevelDB\u3001RocksDB）：\u6bcf\u5c42\u662f"\u4e00\u7ec4\u65e0\u91cd\u53e0\u7684\u6709\u5e8f SSTable"，\u5c42\u4e0e\u5c42\u4e4b\u95f4\u5927\u5c0f\u5dee\u4e00\u4e2a\u500d\u6570（\u5178\u578b\u662f 10 \u500d）\u3002L0 \u6ee1\u4e86\u5c31\u5f80\u4e0b\u5c42\u5408\u5e76，\u628a\u6570\u636e"\u63a8"\u8fdb\u91d1\u5b57\u5854\u3002\u8bfb\u653e\u5927\u4f4e（\u6bcf\u5c42\u6700\u591a\u67e5\u4e00\u4e24\u4e2a\u6587\u4ef6）\u3001\u7a7a\u95f4\u653e\u5927\u4f4e，\u4f46\u5199\u653e\u5927\u9ad8\u3002<\/p>\n

      \u5199\u653e\u5927\u8fd9\u7b14\u8d26，Leveled \u7684\u7b56\u7565\u4e0b\u53ef\u4ee5\u7c97\u7565\u4f30\u4e00\u4e0b：\u8bbe\u76f8\u90bb\u5c42\u5927\u5c0f\u6bd4\u662f T（\u6bd4\u5982 10），\u4e00\u6761\u6570\u636e\u4ece L0 \u4e00\u8def\u88ab\u63a8\u5230\u6700\u5e95\u5c42，\u51e0\u4e4e\u6bcf\u4e00\u5c42\u90fd\u8981\u88ab\u91cd\u5199\u4e00\u6b21（\u5408\u5e76\u65f6\u628a\u5b83\u642c\u8fdb\u4e0b\u4e00\u5c42），\u6240\u4ee5\u5199\u653e\u5927\u91cf\u7ea7\u5927\u81f4\u662f O(T \u00d7 \u5c42\u6570)，\u5b9e\u9645\u6d4b\u51fa\u6765 10 \u5230 30 \u500d\u5f88\u5e38\u89c1\u3002Tiered \u7684\u5199\u653e\u5927\u5219\u63a5\u8fd1 O(1) \u5230\u4e2a\u4f4d\u6570\u3002<\/p>\n

      \u4e8e\u662f\u6709\u4e86\u90a3\u4e2a\u8457\u540d\u7684 RUM \u731c\u60f3（Read \/ Update \/ Memory \u4e09\u8005\u4e0d\u53ef\u517c\u5f97）：\u8bfb\u653e\u5927\u3001\u5199\u653e\u5927\u3001\u7a7a\u95f4\u653e\u5927，\u4f60\u6700\u591a\u538b\u4f4f\u4e24\u4e2a，\u603b\u8981\u727a\u7272\u4e00\u4e2a\u3002<\/p>\n

        \n
      • \u8981\u5199\u5feb \u2192 Tiered，\u63a5\u53d7\u8bfb\u6162\u3001\u5360\u7a7a\u95f4\u3002<\/li>\n
      • \u8981\u8bfb\u5feb\u3001\u7701\u7a7a\u95f4 \u2192 Leveled，\u63a5\u53d7\u5199\u653e\u5927\u9ad8\u3002<\/li>\n<\/ul>\n

        RocksDB \u9ed8\u8ba4\u8d70 Leveled，\u4f46\u5141\u8bb8\u4f60\u6309\u8d1f\u8f7d\u8c03\u6210 Tiered \u6216\u6df7\u5408，\u672c\u8d28\u5c31\u662f\u5728\u8fd9\u4e09\u4e2a\u653e\u5927\u4e4b\u95f4\u632a\u9884\u7b97\u3002<\/p>\n

        \u4e3a\u4ec0\u4e48\u5b83\u503c\u5f97\u4f60\u4e86\u89e3<\/h3>\n

        LSM-Tree \u5df2\u7ecf\u4e0d\u53ea\u662f"\u67d0\u4e2a\u6570\u636e\u5e93\u7684\u5185\u90e8\u5b9e\u73b0"，\u5b83\u6491\u8d77\u4e86\u6574\u4e2a\u73b0\u4ee3\u57fa\u7840\u8bbe\u65bd\u7684\u5199\u5165\u5c42：RocksDB \u662f TiKV\u3001CockroachDB\u3001Flink\u3001\u5f88\u591a\u6d88\u606f\u961f\u5217\u7684\u5b58\u50a8\u5e95\u5ea7，Cassandra\/HBase \u662f\u5927\u6570\u636e\u5217\u5b58\u7684\u6807\u914d，\u8fde Kafka \u7684\u65e5\u5fd7\u5206\u6bb5\u3001LevelDB \u5185\u5d4c\u5728 Chrome \u91cc\u5b58\u6d4f\u89c8\u6570\u636e，\u80cc\u540e\u90fd\u662f"\u987a\u5e8f\u5199 + \u540e\u53f0\u5408\u5e76"\u8fd9\u4e00\u5957\u54f2\u5b66\u3002<\/p>\n

        \u7406\u89e3\u5b83，\u4f60\u5c31\u80fd\u770b\u61c2\u4e00\u5806\u770b\u4f3c\u4e0d\u76f8\u5e72\u7684\u4e1c\u897f：\u4e3a\u4ec0\u4e48 Kafka \u8ffd\u52a0\u5199\u80fd\u8fd9\u4e48\u5feb，\u4e3a\u4ec0\u4e48\u6709\u4e9b\u65f6\u5e8f\u6570\u636e\u5e93\u5199\u5165\u91cf\u60ca\u4eba\u4f46\u5076\u5c14\u67e5\u8be2\u4f1a\u6296\u4e00\u4e0b，\u4e3a\u4ec0\u4e48 RocksDB \u7684\u8c03\u53c2\u53c2\u6570\u91cc"compaction"\u5360\u4e86\u4e00\u534a\u3002\u5b83\u4eec\u90fd\u662f\u540c\u4e00\u7b14\u8d26\u7684\u4e0d\u540c\u8bb0\u6cd5\u3002<\/p>\n

        \u548c 408 \u7684\u5173\u7cfb（\u5ef6\u4f38）<\/h3>\n

        B+ \u6811\u662f 408 \u6570\u636e\u7ed3\u6784\u3001\u4ee5\u53ca\u6570\u636e\u5e93\u7d22\u5f15\u7684\u5fc5\u8003\u70b9，\u672c\u535a\u5ba2\u4e4b\u524d\u4e13\u95e8\u62c6\u8fc7\u5b83\u4e3a\u4ec0\u4e48\u662f\u7d22\u5f15\u7684\u201c\u5929\u9009\u4e4b\u5b50\u201d（\u6570\u636e\u5e93\u7d22\u5f15\u4e3a\u4ec0\u4e48\u7528 B+ \u6811，\u800c\u4e0d\u662f\u66f4\u201c\u806a\u660e\u201d\u7684\u4e8c\u53c9\u6811？\u2014\u2014\u7b54\u6848\u4e0d\u5728\u7b97\u6cd5，\u5728\u78c1\u76d8）\u3002LSM-Tree \u662f B+ \u6811\u5728"\u5199\u5bc6\u96c6"\u573a\u666f\u4e0b\u7684\u4e00\u4e2a\u5de5\u4e1a\u7ea7\u5bf9\u624b，\u5c5e\u4e8e\u5ef6\u4f38\/\u8fdb\u9636\u5185\u5bb9，\u4e0d\u5728 408 \u8003\u7eb2\u5185，\u4f46\u7406\u89e3"\u4e3a\u4ec0\u4e48\u6709\u4eba\u613f\u610f\u727a\u7272\u8bfb\u6765\u6362\u5199"，\u6070\u6070\u662f\u5403\u900f B+ \u6811\u8bbe\u8ba1\u52a8\u673a\u7684\u53cd\u9762\u6559\u6750\u2014\u2014\u8003\u7eb2\u5185\u7684 B+ \u6811\u662f"\u8bfb\u4f18\u5316\u7684\u6709\u5e8f\u6811"，\u8003\u7eb2\u5916\u7684 LSM \u662f"\u5199\u4f18\u5316\u7684\u6709\u5e8f\u6811"，\u5bf9\u7167\u7740\u770b，\u4e24\u8fb9\u90fd\u66f4\u900f\u4e86\u3002<\/p>\n

        \n

        \u6240\u4ee5\u4e0b\u6b21\u518d\u6709\u4eba\u95ee"\u4e3a\u4ec0\u4e48\u6211\u7684\u6570\u636e\u5e93\u5199\u5f97\u8fd9\u4e48\u6162"，\u5148\u522b\u6025\u7740\u52a0\u673a\u5668\u3002\u95ee\u95ee\u81ea\u5df1：\u4f60\u662f\u5728\u987a\u5e8f\u5199，\u8fd8\u662f\u5728\u968f\u673a\u5199？\u5982\u679c\u662f\u540e\u8005，\u8981\u4e48\u6362\u6570\u636e\u7ed3\u6784，\u8981\u4e48\u50cf LSM \u4e00\u6837，\u628a\u968f\u673a\u5ef6\u540e\u3001\u628a\u987a\u5e8f\u63d0\u524d\u3002\u5b58\u50a8\u5f15\u64ce\u7684\u4e16\u754c\u91cc，\u6ca1\u6709\u66f4\u5feb\u7684\u78c1\u76d8，\u53ea\u6709\u66f4\u806a\u660e\u7684\u5199\u987a\u5e8f\u3002<\/p>\n

        LSM-Tree \u8bf4\u5230\u5e95\u8fd8\u662f\u68f5"\u5408\u5e76\u6811"，\u6811\u7ed3\u6784\u3001\u8df3\u8868\u3001\u5e03\u9686\u8fc7\u6ee4\u5668\u8fd9\u4e9b\u5e95\u5b50\u90fd\u662f\u6570\u636e\u7ed3\u6784\u7684\u8303\u7574\u3002\u60f3\u8865\u8fd9\u5757，\u63a8\u8350 B\u7ad9\u3010408\u5b9e\u9a8c\u5ba4\u3011\u7684\u300a\u6570\u636e\u7ed3\u6784\u300b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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