{"id":30706,"date":"2026-05-11T10:00:00","date_gmt":"2026-05-11T02:00:00","guid":{"rendered":"https:\/\/cn.hostease.com\/blog\/?p=30706"},"modified":"2026-05-16T22:56:50","modified_gmt":"2026-05-16T14:56:50","slug":"linux-i-o","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/blog\/linux\/linux-i-o\/","title":{"rendered":"Linux \u78c1\u76d8 I\/O \u8c03\u5ea6\u5668\u9009\u578b\u4e0e\u5207\u6362\u5b9e\u6218"},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Linux \u78c1\u76d8 I\/O \u8c03\u5ea6\u5668\u9009\u578b\u793a\u610f\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/05\/linux-i-o-cover.webp\" \/><\/p>\n<p>\u672c\u6587\u6559\u4f60\u5982\u4f55\u4e3a\u4e0d\u540c\u5b58\u50a8\u4ecb\u8d28\u9009\u62e9\u5408\u9002\u7684 Linux \u78c1\u76d8 I\/O \u8c03\u5ea6\u5668\uff0c\u8986\u76d6 mq-deadline\u3001kyber\u3001bfq \u4e09\u79cd\u4e3b\u6d41\u591a\u961f\u5217\u8c03\u5ea6\u5668\u7684\u5bf9\u6bd4\u4e0e\u5207\u6362\u5b9e\u6218\u3002\u8bfb\u5b8c\u4f60\u4f1a\u5f97\u5230\u4e09\u4ef6\u4ea7\u51fa\uff1a\u6309\u4ecb\u8d28\uff08NVMe \/ SATA SSD \/ HDD\uff09\u5212\u5206\u7684\u8c03\u5ea6\u5668\u9009\u578b\u77e9\u9635\uff1b\u8fd0\u884c\u65f6\u4e0e\u6301\u4e45\u5316\u4e24\u79cd\u5207\u6362\u65b9\u6cd5\uff1b\u9488\u5bf9\u5ef6\u8fdf\u6296\u52a8\u3001\u957f\u5c3e\u8bf7\u6c42\u3001\u6df7\u5408\u8bfb\u5199\u7684\u6392\u67e5\u6e05\u5355\u3002<\/p>\n<h2>\u4e00\u3001Linux I\/O \u8c03\u5ea6\u5668\u4ece\u5355\u961f\u5217\u5230\u591a\u961f\u5217<\/h2>\n<p>Linux 5.0 \u8d77\u5185\u6838\u9ed8\u8ba4\u8d70\u591a\u961f\u5217\u5757\u5c42\uff08blk-mq\uff09\uff0c\u4f20\u7edf\u7684 cfq\u3001deadline\u3001noop \u5355\u961f\u5217\u8c03\u5ea6\u5668\u5df2\u88ab\u5f7b\u5e95\u79fb\u9664\u3002\u5f53\u524d\u4e3b\u7ebf\u53ea\u5269\u4e09\u79cd\u8c03\u5ea6\u5668\uff1amq-deadline \u662f deadline \u7684\u591a\u961f\u5217\u7248\u672c\uff0c\u5f3a\u8c03\u8bfb\u5ef6\u8fdf\u4e0a\u9650\uff1bkyber \u662f Facebook \u8d21\u732e\u7684\u4f4e\u5ef6\u8fdf\u65b9\u6848\uff0c\u4e13\u4e3a\u9ad8 IOPS\uff08\u6bcf\u79d2\u8bfb\u5199\u6b21\u6570\uff09\u7684 NVMe \u4f18\u5316\uff1bbfq\uff08Budget Fair Queueing\uff09\u5219\u5728\u4ea4\u4e92\u8d1f\u8f7d\u4e0e\u516c\u5e73\u6027\u4e0a\u505a\u4e86\u5927\u91cf\u5de5\u4f5c\u3002\u8fd8\u6709\u4e00\u4e2a\u7279\u6b8a\u9009\u9879 <code>none<\/code>\uff0c\u610f\u601d\u662f\u4e0d\u505a\u8f6f\u4ef6\u5c42\u8c03\u5ea6\uff0c\u628a\u6240\u6709\u51b3\u7b56\u4ea4\u7ed9\u786c\u4ef6\uff0c\u591a\u89c1\u4e8e\u9ad8\u7aef NVMe\u3002<\/p>\n<p>\u5982\u4f55\u67e5\u770b\u5f53\u524d\u8c03\u5ea6\u5668\uff1f<code>cat \/proc\/sys\/block\/sda\/queue\/scheduler<\/code> \u4f1a\u5217\u51fa\u53ef\u9009\u4e0e\u5f53\u524d\u6fc0\u6d3b\u9879\uff0c\u4e2d\u62ec\u53f7\u5305\u8d77\u6765\u7684\u5c31\u662f\u6fc0\u6d3b\u7684\u3002\u4e3a\u4ec0\u4e48\u5185\u6838\u4e0d\u80fd\u81ea\u52a8\u9009\u6700\u4f18\uff1f\u56e0\u4e3a\u6700\u4f18\u89e3\u4f9d\u8d56\u5de5\u4f5c\u8d1f\u8f7d\u7279\u5f81\uff0c\u7eaf\u987a\u5e8f\u8bfb\u3001\u968f\u673a\u5199\u3001\u6df7\u5408\u8bfb\u5199\u5404\u6709\u5408\u9002\u7684\u8c03\u5ea6\u5668\uff0c\u5185\u6838\u53ea\u80fd\u7ed9\u51fa\u57fa\u4e8e\u4ecb\u8d28\u7c7b\u578b\u7684\u5408\u7406\u9ed8\u8ba4\u503c\uff0c\u5269\u4e0b\u7684\u5f97\u9760\u8fd0\u7ef4\u5b9e\u6d4b\u3002\u4e91\u670d\u52a1\u5668\uff08\u57fa\u4e8e\u865a\u62df\u5316\u7684\u5f39\u6027\u8ba1\u7b97\u8d44\u6e90\uff09\u4f7f\u7528\u7684\u865a\u62df\u78c1\u76d8\u5f80\u5f80\u662f virtio-blk \u6216 virtio-scsi\uff0c\u8c03\u5ea6\u5668\u4ecd\u751f\u6548\uff0c\u76f8\u5173\u9009\u578b\u53ef\u53c2\u8003 <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/cloud-server-buying-guide\/\">\u4e91\u670d\u52a1\u5668\u9009\u8d2d\u6307\u5357<\/a>\u3002<\/p>\n<h2>\u4e8c\u3001mq-deadline\uff1a\u901a\u7528\u57fa\u7ebf\u7684\u7a33\u59a5\u4e4b\u9009<\/h2>\n<p>mq-deadline \u7ed9\u6bcf\u4e2a I\/O \u8bf7\u6c42\u8bbe\u4e00\u4e2a\u6700\u665a\u5b8c\u6210\u65f6\u95f4\uff08\u8bfb 500ms\u3001\u5199 5s\uff09\uff0c\u5230\u70b9\u5fc5\u987b\u8c03\u5ea6\u51fa\u53bb\uff0c\u907f\u514d\u88ab\u5408\u5e76\u961f\u5217\u91cc\u7684\u5176\u4ed6\u8bf7\u6c42\u957f\u671f\u963b\u585e\u3002\u5b83\u7684\u6838\u5fc3\u4f18\u70b9\u662f\u5ef6\u8fdf\u53ef\u9884\u6d4b\uff0c\u6700\u574f\u60c5\u51b5\u4e0b\u7684\u5c3e\u5ef6\u8fdf\u6bd4 kyber \u4e0e bfq \u66f4\u7a33\u5b9a\u3002\u9002\u7528\u573a\u666f\uff1a<\/p>\n<ul>\n<li>MySQL\u3001PostgreSQL \u8fd9\u7c7b\u5bf9\u8bfb\u5ef6\u8fdf\u654f\u611f\u7684 OLTP \u6570\u636e\u5e93\uff08OnLine Transaction Processing\uff09<\/li>\n<li>\u6587\u4ef6\u670d\u52a1\u5668\u4e0e\u5c0f\u6587\u4ef6\u5927\u91cf\u5e76\u53d1\u7684\u573a\u666f<\/li>\n<li>SATA SSD \u4e0e NVMe \u4e0a\u8bfb\u5199\u6df7\u5408\u4e14\u8981\u6c42\u516c\u5e73<\/li>\n<li>\u5355\u79df\u6237\u88f8\u91d1\u5c5e\u73af\u5883\uff0c\u4e0d\u9700\u8981\u6309\u8fdb\u7a0b\u505a\u7cbe\u7ec6\u914d\u989d<\/li>\n<\/ul>\n<p>\u5207\u6362\u65b9\u6cd5\uff1a\u4e34\u65f6\u6539 <code>echo mq-deadline &gt; \/proc\/sys\/block\/sda\/queue\/scheduler<\/code>\uff0c\u6301\u4e45\u5316\u7528 udev \u89c4\u5219\u3002\u76f8\u5173\u78c1\u76d8\u6027\u80fd\u4e0e\u5907\u4efd\u7b56\u7565\u53ef\u53c2\u8003 <a href=\"https:\/\/cn.hostease.com\/blog\/tutorials\/us-vps-deployment-tutorial-guide\/\">\u7f8e\u56fd VPS \u90e8\u7f72\u6559\u7a0b<\/a>\u3002<\/p>\n<h2>\u4e09\u3001kyber\uff1aNVMe \u9ad8 IOPS \u573a\u666f\u7684\u4f18\u9009<\/h2>\n<p>kyber \u7684\u8bbe\u8ba1\u76ee\u6807\u662f\u628a 95 \u5206\u4f4d\u8bfb\u5ef6\u8fdf\u4e0e\u5199\u5ef6\u8fdf\u90fd\u538b\u5230\u8bbe\u5b9a\u7684\u76ee\u6807\u503c\u4e4b\u4e0b\uff08\u9ed8\u8ba4\u8bfb 2ms\u3001\u5199 10ms\uff09\uff0c\u901a\u8fc7\u52a8\u6001\u8c03\u8282\u961f\u5217\u6df1\u5ea6\u5b9e\u73b0\u3002\u5b83\u5728\u9ad8 IOPS \u7684 NVMe \u4e0a\u80fd\u6301\u7eed\u628a\u5ef6\u8fdf\u6536\u655b\u5230\u76ee\u6807\u7ebf\uff0c\u4f46\u5728 HDD \u4e0e\u4f4e\u7aef SATA SSD \u4e0a\u53cd\u800c\u53ef\u80fd\u8868\u73b0\u4e0d\u5982 mq-deadline\u3002<\/p>\n<pre><code class=\"language-bash\">echo kyber &gt; \/sys\/block\/nvme0n1\/queue\/scheduler\necho 1000000 &gt; \/sys\/block\/nvme0n1\/queue\/iosched\/read_lat_nsec\necho 5000000 &gt; \/sys\/block\/nvme0n1\/queue\/iosched\/write_lat_nsec\n<\/code><\/pre>\n<p>iosched \u5b50\u76ee\u5f55\u4e0b\u7684\u4e24\u4e2a\u53c2\u6570\u5141\u8bb8\u4f60\u6309\u4e1a\u52a1\u8c03\u6574\u76ee\u6807\u5ef6\u8fdf\u3002\u6ce8\u610f kyber \u4e0d\u9002\u5408\u957f\u5c3e\u654f\u611f\u573a\u666f\uff0c\u5b83\u4f18\u5316\u7684\u662f 95 \u5206\u4f4d\u800c\u975e 99.9 \u5206\u4f4d\uff0c\u5bf9\u4f4e\u5c3e\u5ef6\u8fdf\u82db\u523b\u7684\u5b9e\u65f6\u4e1a\u52a1\u5efa\u8bae\u5148\u7528 mq-deadline \u9a8c\u8bc1\u57fa\u7ebf\u518d\u51b3\u5b9a\u3002<\/p>\n<h2>\u56db\u3001bfq\uff1a\u684c\u9762\u4e0e\u591a\u79df\u6237\u7684\u516c\u5e73\u4f18\u5148<\/h2>\n<p>bfq \u5728\u6bcf\u4e2a\u8fdb\u7a0b\/cgroup \u4e0a\u7ef4\u62a4\u72ec\u7acb\u9884\u7b97\uff0c\u6309\u6743\u91cd\u5206\u914d I\/O \u5e26\u5bbd\uff08Bandwidth\uff0c\u5373\u6bcf\u79d2\u8bfb\u5199\u6570\u636e\u91cf\uff0cMB\/s\uff09\u3002\u8fd9\u5957\u673a\u5236\u8ba9\u4ea4\u4e92\u5f0f\u8d1f\u8f7d\uff08IDE \u7f16\u8bd1\u3001\u684c\u9762\u6d4f\u89c8\uff09\u5373\u4fbf\u5728\u5927\u6587\u4ef6\u4f20\u8f93\u5e76\u884c\u65f6\u4e5f\u4e0d\u5361\u987f\uff0c\u662f\u591a\u7528\u6237\u5171\u4eab\u5b58\u50a8\u7684\u597d\u9009\u62e9\u3002\u4ee3\u4ef7\u662f CPU \u5f00\u9500\u6bd4 mq-deadline \u9ad8 5%-10%\uff0c\u7eaf\u987a\u5e8f\u9ad8\u541e\u5410\u573a\u666f\u4e0b\u4f1a\u51fa\u73b0\u8f7b\u5fae\u541e\u5410\u635f\u5931\u3002<\/p>\n<p>\u5bb9\u5668\u73af\u5883\u4e0b bfq \u4e0e blkio cgroup\uff08control group\uff0c\u8d44\u6e90\u9694\u79bb\u673a\u5236\uff09\u80fd\u5f88\u597d\u5730\u914d\u5408\uff1a\u4f60\u53ef\u4ee5\u7ed9 prod \u5bb9\u5668\u5206 80% \u6743\u91cd\u3001\u7ed9 batch \u5bb9\u5668\u5206 20%\uff0c\u5b9e\u6d4b\u8d77\u6765\u6bd4\u5355\u7eaf\u9760 IOPS \u4e0a\u9650\u505a\u9694\u79bb\u8981\u5e73\u6ed1\u3002CDN\uff08Content Delivery Network\uff0c\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u56de\u6e90\u78c1\u76d8\u4e0a\u662f\u5426\u5207 bfq \u53d6\u51b3\u4e8e\u6e90\u7ad9\u662f\u5355\u670d\u52a1\u8fd8\u662f\u591a\u670d\u52a1\u5171\u7528\uff0c\u76f8\u5173\u8fb9\u7f18\u7f13\u5b58\u7b56\u7565\u53ef\u7ee7\u7eed\u770b <a href=\"https:\/\/cn.hostease.com\/blog\/wordpress\/wordpress-w3-total-cache-tuning\/\">W3 Total Cache \u8c03\u4f18\u5b9e\u6218<\/a> \u4e0e <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/wordpress-hk-hosting-guide\/\">WordPress \u9999\u6e2f\u4e3b\u673a\u9009\u8d2d\u6307\u5357<\/a>\u3002<\/p>\n<h2>\u4e94\u3001\u6309\u4ecb\u8d28\u7ed9\u51fa\u7684\u9009\u578b\u77e9\u9635<\/h2>\n<p>\u4e0b\u8868\u662f\u4e00\u4efd\u7b80\u5316\u7684\u5b9e\u6218\u5efa\u8bae\u77e9\u9635\uff0c\u4ec5\u4f9b\u8d77\u70b9\u53c2\u8003\uff1a<\/p>\n<ul>\n<li>\u4f01\u4e1a\u7ea7 NVMe\uff08DC SSD\uff09\uff1anone \u6216 kyber\uff0c\u786c\u4ef6\u961f\u5217\u6df1\u5ea6\u8db3\u591f\u65f6 none \u53cd\u800c\u6700\u5feb<\/li>\n<li>\u6d88\u8d39\u7ea7 NVMe \/ SATA SSD\uff1amq-deadline \u662f\u7a33\u59a5\u57fa\u7ebf\uff0c\u9047\u5230\u5c3e\u5ef6\u8fdf\u95ee\u9898\u518d\u5207 kyber<\/li>\n<li>\u4f20\u7edf HDD\uff1amq-deadline\uff0c\u5f00\u542f\u5199\u5408\u5e76\uff1bbfq \u9002\u5408\u684c\u9762\u4f46\u751f\u4ea7\u670d\u52a1\u5668\u4e00\u822c\u4e0d\u63a8\u8350<\/li>\n<li>\u865a\u62df\u5316\u78c1\u76d8\uff08virtio\uff09\uff1amq-deadline\uff0c\u7531 host \u7aef\u518d\u6b21\u8c03\u5ea6<\/li>\n<\/ul>\n<p>\u843d\u5730\u7b56\u7565\u662f\u5148\u7528 <code>fio<\/code> \u8dd1\u4e00\u7ec4\u57fa\u51c6\uff08\u968f\u673a\u8bfb\u3001\u987a\u5e8f\u5199\u3001\u6df7\u5408\u8bfb\u5199\u5404 60 \u79d2\uff09\uff0c\u518d\u5207\u6362\u8c03\u5ea6\u5668\u8dd1\u540c\u6837\u57fa\u51c6\uff0c\u5bf9\u6bd4 IOPS\u3001\u5e26\u5bbd\u3001\u5e73\u5747\u5ef6\u8fdf\u300199 \u5206\u4f4d\u5ef6\u8fdf\u56db\u9879\u3002\u4efb\u4f55\u4e00\u9879\u56de\u9000\u8d85\u8fc7 5% \u90fd\u5efa\u8bae\u4fdd\u7559\u539f\u8c03\u5ea6\u5668\uff0c\u8c03\u5ea6\u5668\u4e0d\u662f\u8d8a\u65b0\u8d8a\u597d\u3002<\/p>\n<h2>\u516d\u3001\u8fd0\u884c\u65f6\u5207\u6362\u4e0e\u6301\u4e45\u5316<\/h2>\n<p>\u8fd0\u884c\u65f6\u5207\u6362\u975e\u5e38\u8f7b\u91cf\uff0cI\/O \u961f\u5217\u4f1a\u88ab\u77ed\u6682\u6392\u7a7a\u518d\u91cd\u5efa\uff1a<\/p>\n<p><code>echo &lt;\u8c03\u5ea6\u5668&gt; &gt; \/sys\/block\/&lt;dev&gt;\/queue\/scheduler<\/code> \u5373\u53ef\u3002\u6301\u4e45\u5316\u63a8\u8350\u7528 udev \u89c4\u5219\uff0c\u907f\u514d GRUB \u547d\u4ee4\u884c\u786c\u7f16\u7801\u5bfc\u81f4\u91cd\u88c5\u65f6\u4e22\u5931\u3002\u89c4\u5219\u793a\u4f8b\u653e\u5728 <code>\/etc\/udev\/rules.d\/60-ioschedulers.rules<\/code>\uff1a<\/p>\n<pre><code>ACTION==&quot;add|change&quot;, KERNEL==&quot;nvme[0-9]n[0-9]&quot;, ATTR{queue\/scheduler}=&quot;kyber&quot;\nACTION==&quot;add|change&quot;, KERNEL==&quot;sd[a-z]&quot;, ATTR{queue\/rotational}==&quot;0&quot;, ATTR{queue\/scheduler}=&quot;mq-deadline&quot;\nACTION==&quot;add|change&quot;, KERNEL==&quot;sd[a-z]&quot;, ATTR{queue\/rotational}==&quot;1&quot;, ATTR{queue\/scheduler}=&quot;mq-deadline&quot;\n<\/code><\/pre>\n<p>\u52a0\u8f7d\u65b9\u5f0f\uff1a<code>udevadm control --reload &amp;&amp; udevadm trigger<\/code>\u3002\u9a8c\u8bc1\u7528 <code>cat \/sys\/block\/*\/queue\/scheduler<\/code> \u8d70\u4e00\u904d\u3002\u5bb9\u5668\u573a\u666f\u4e0b\u5bbf\u4e3b\u673a\u7684\u8c03\u5ea6\u5668\u5bf9\u6240\u6709\u5bb9\u5668\u5171\u7528\u78c1\u76d8\u7684 I\/O \u90fd\u6709\u6548\uff0c\u5bb9\u5668\u5185\u65e0\u6cd5\u6539\u5bbf\u4e3b\u673a\u8c03\u5ea6\u5668\u3002\u66f4\u591a\u670d\u52a1\u5668\u4fa7\u7684\u8fd0\u7ef4\u8bae\u9898\u53ef\u7ee7\u7eed\u9605\u8bfb <a href=\"https:\/\/cn.hostease.com\/blog\/category\/wordpress\/\">WordPress \u5206\u7c7b\u4e0b\u7684\u76f8\u5173\u6587\u7ae0<\/a>\u3002<\/p>\n<p>\u8c03\u4f18\u8fc7\u7a0b\u4e2d\u8981\u8bb0\u4e00\u4efd\u53d8\u66f4\u65e5\u5fd7\uff1a\u53d8\u66f4\u65e5\u671f\u3001\u539f\u503c\u3001\u65b0\u503c\u3001\u56de\u9000\u547d\u4ee4\u3001\u538b\u6d4b\u5bf9\u6bd4\u6307\u6807\u3002\u65e5\u5fd7\u653e\u5230 Git \u4ed3\u5e93\u6216\u5185\u90e8 Confluence \u90fd\u884c\uff0c\u5173\u952e\u662f\u6bcf\u6b21\u5207\u6362\u90fd\u80fd\u8ffd\u6eaf\u3002\u8fd9\u70b9\u5728\u591a\u4eba\u534f\u4f5c\u7684\u8fd0\u7ef4\u56e2\u961f\u91cc\u5c24\u5176\u91cd\u8981\uff0c\u907f\u514d\u51fa\u95ee\u9898\u65f6\u4e92\u76f8\u7529\u9505\u53c8\u627e\u4e0d\u5230\u4e0a\u6b21\u6539\u4e86\u4ec0\u4e48\u3002<\/p>\n<h2>\u4e03\u3001\u8fd0\u7ef4\u4fa7\u7684\u6ce8\u610f\u4e8b\u9879<\/h2>\n<p>\u8c03\u5ea6\u5668\u5207\u6362\u662f\u5373\u65f6\u751f\u6548\u7684\uff0c\u4f46\u6548\u679c\u672a\u5fc5\u7acb\u523b\u53ef\u89c1\u3002\u5efa\u8bae\u6bcf\u6b21\u5207\u5b8c\u540e\u8ba9\u4e1a\u52a1\u8dd1\u6ee1\u4e00\u4e2a\u6d41\u91cf\u5cf0\u503c\u5468\u671f\uff08\u4e00\u822c 24 \u5c0f\u65f6\uff09\u518d\u6536\u96c6\u6307\u6807\u5bf9\u6bd4\u3002\u77ed\u671f\u770b\u53ef\u80fd\u56e0\u4e3a\u7f13\u5b58\u547d\u4e2d\u7387\u53d8\u5316\u3001\u5185\u6838\u7edf\u8ba1\u8ba1\u6570\u5668\u91cd\u7f6e\u7b49\u539f\u56e0\u51fa\u73b0\u8bef\u5224\u3002\u751f\u4ea7\u73af\u5883\u4e2d\u9047\u5230\u7684\u5e38\u89c1\u8bef\u533a\u8fd8\u6709\uff1a\u628a\u6240\u6709\u78c1\u76d8\u7edf\u4e00\u5207\u5230\u540c\u4e00\u79cd\u8c03\u5ea6\u5668\uff0c\u6ca1\u6709\u6309\u4ecb\u8d28\u533a\u5206\uff1b\u53ea\u770b\u541e\u5410\u91cf\u5374\u5ffd\u7565\u5c3e\u5ef6\u8fdf\uff1b\u8c03\u5ea6\u5668\u5207\u5b8c\u4e0d\u6301\u4e45\u5316\uff0c\u91cd\u542f\u5c31\u56de\u6eda\u5230\u9ed8\u8ba4\u3002\u8fd9\u4e9b\u90fd\u662f\u8fc7\u53bb\u51e0\u5e74\u91cc\u53cd\u590d\u9047\u5230\u7684\u5751\u3002<\/p>\n<p>\u53e6\u4e00\u4e2a\u5bb9\u6613\u5ffd\u89c6\u7684\u7ec6\u8282\u662f nr_requests \u53c2\u6570\uff0c\u5b83\u63a7\u5236\u5355\u4e2a\u961f\u5217\u91cc pending \u8bf7\u6c42\u7684\u6700\u5927\u6570\u91cf\u3002\u9ed8\u8ba4 256 \u5bf9\u9ad8\u541e\u5410 NVMe \u504f\u5c0f\uff0c\u53ef\u4ee5\u63d0\u5230 1024 \u6216 2048\uff1bHDD \u5219\u4fdd\u6301\u9ed8\u8ba4\u5373\u53ef\u3002\u5199\u5165\u8def\u5f84\u4e0a\u8fd8\u6709 dirty_ratio\u3001dirty_background_ratio \u5f71\u54cd page cache \u5237\u76d8\u8282\u594f\uff0c\u8fd9\u4e24\u4e2a sysctl \u4e0e I\/O \u8c03\u5ea6\u5668\u914d\u5408\u4f7f\u7528\u6536\u76ca\u66f4\u5927\u3002<\/p>\n<h2>\u603b\u7ed3\u4e0e\u5efa\u8bae<\/h2>\n<p>I\/O \u8c03\u5ea6\u5668\u6ca1\u6709\u94f6\u5f39\uff0c\u662f\u4ecb\u8d28\u7279\u6027\u4e0e\u4e1a\u52a1\u8d1f\u8f7d\u5171\u540c\u51b3\u5b9a\u7684\u5c40\u90e8\u6700\u4f18\u89e3\u3002\u5efa\u8bae\u4f60\u5148\u62ff fio \u8dd1\u57fa\u7ebf\u3001\u518d\u6309\u672c\u6587\u77e9\u9635\u9009\u8d77\u70b9\u3001\u6700\u540e\u7528 udev \u6301\u4e45\u5316\uff1b\u4efb\u4f55\u5207\u6362\u90fd\u8981\u5e26\u4e00\u7ec4\u5bf9\u7167\u5b9e\u9a8c\u6570\u636e\uff0c\u907f\u514d\u51ed\u76f4\u89c9\u8c03\u53c2\u3002\u5982\u679c\u4f60\u9700\u8981\u5728\u591a\u53f0\u673a\u5668\u4e0a\u6279\u91cf\u7ba1\u7406\u8c03\u5ea6\u5668\uff0c\u53ef\u4ee5\u8003\u8651\u7528 Ansible \u628a udev \u89c4\u5219\u4e0e\u57fa\u51c6\u811a\u672c\u4e00\u8d77\u4e0b\u53d1\uff0c\u5efa\u7acb\u6807\u51c6\u5316\u7684 I\/O \u8c03\u4f18\u6d41\u7a0b\u3002\u603b\u7ed3\u4e00\u4e0b\uff0c\u7a33\u59a5\u7684\u8def\u5f84\u662f mq-deadline \u515c\u5e95\u3001kyber \u4e0e bfq \u6309\u573a\u666f\u4e0a\u3001none \u7559\u7ed9\u771f\u6b63\u9ad8\u7aef\u7684\u786c\u4ef6\uff0c\u5b9a\u671f\u56de\u770b\u57fa\u51c6\u6570\u636e\u5e76\u5bf9\u6bd4\u4e1a\u52a1\u5ef6\u8fdf\u6307\u6807\u624d\u80fd\u6301\u7eed\u53d7\u76ca\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7cfb\u7edf\u8bb2\u89e3 Linux \u78c1\u76d8 I\/O \u8c03\u5ea6\u5668 mq-deadline\u3001kyber\u3001bfq \u7684\u5dee\u5f02\u3001\u9002\u7528\u573a\u666f\u4e0e\u5207\u6362\u65b9\u6cd5\uff0c\u9644 NVMe\u3001SSD\u3001HDD \u4e09\u7c7b\u4ecb\u8d28\u7684\u8c03\u4f18\u5efa\u8bae\u3002<\/p>\n","protected":false},"author":2,"featured_media":30705,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4363],"tags":[],"class_list":["post-30706","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux"],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/05\/linux-i-o-cover.webp","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/30706","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/comments?post=30706"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/30706\/revisions"}],"predecessor-version":[{"id":30711,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/30706\/revisions\/30711"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media\/30705"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media?parent=30706"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/categories?post=30706"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/tags?post=30706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}