{"id":208456,"date":"2025-09-29T17:19:21","date_gmt":"2025-09-29T09:19:21","guid":{"rendered":"https:\/\/www.server.hk\/blog\/208456\/"},"modified":"2025-09-29T17:19:22","modified_gmt":"2025-09-29T09:19:22","slug":"vps-ssd","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208456\/","title":{"rendered":"\u9999\u6e2fVPS\u6362SSD\uff1a\u964d\u4f4e\u5ef6\u8fdf\u3001\u663e\u8457\u63d0\u5347\u6570\u636e\u5904\u7406\u901f\u5ea6"},"content":{"rendered":"<p>\u5728\u5168\u7403\u4e92\u8054\u7f51\u670d\u52a1\u67b6\u6784\u4e2d\uff0c\u5b58\u50a8\u5b50\u7cfb\u7edf\u7684\u6027\u80fd\u76f4\u63a5\u51b3\u5b9a\u4e86\u5e94\u7528\u54cd\u5e94\u65f6\u95f4\u548c\u6570\u636e\u5904\u7406\u541e\u5410\u3002\u5bf9\u4e8e\u9762\u5411\u534e\u5357\u3001\u4e1c\u5357\u4e9a\u7528\u6237\u7684\u670d\u52a1\uff0c\u9009\u62e9\u4f4d\u4e8e\u9999\u6e2f\u7684\u865a\u62df\u79c1\u6709\u670d\u52a1\u5668\u5e76\u5c06\u4f20\u7edf\u673a\u68b0\u76d8\u6216\u4f4e\u7aefSSD\u5347\u7ea7\u4e3a\u9ad8\u6027\u80fdSSD\uff0c\u53ef\u4ee5\u663e\u8457\u964d\u4f4e\u5ef6\u8fdf\u5e76\u63d0\u5347I\/O\u5bc6\u96c6\u578b\u4efb\u52a1\u7684\u5904\u7406\u901f\u5ea6\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u548c\u5f00\u53d1\u8005\uff0c\u6df1\u5165\u89e3\u6790\u66f4\u6362\u4e3aSSD\u540e\u7684\u6280\u672f\u539f\u7406\u3001\u5178\u578b\u5e94\u7528\u573a\u666f\u3001\u4e0e\u5176\u4ed6\u5730\u57df\uff08\u5982\u7f8e\u56fdVPS\/\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u6bd4\u8f83\u7684\u5f71\u54cd\uff0c\u4ee5\u53ca\u5b9e\u7528\u7684\u9009\u8d2d\u4e0e\u90e8\u7f72\u5efa\u8bae\u3002<\/p>\n<h2>\u5b58\u50a8\u6027\u80fd\u57fa\u7840\uff1a\u4e3a\u4ec0\u4e48SSD\u80fd\u663e\u8457\u63d0\u5347\u901f\u5ea6<\/h2>\n<p>\u7406\u89e3SSD\u5e26\u6765\u6027\u80fd\u63d0\u5347\uff0c\u9700\u4ece\u51e0\u4e2a\u5173\u952e\u6307\u6807\u5165\u624b\uff1a<\/p>\n<ul>\n<li><strong>\u968f\u673a\u8bfb\u5199\u5ef6\u8fdf\uff08Latency\uff09<\/strong>\uff1a\u4f20\u7edf\u673a\u68b0\u786c\u76d8\uff08HDD\uff09\u5728\u968f\u673aI\/O\u4e0b\u7684\u5bfb\u9053\u65f6\u95f4\u548c\u65cb\u8f6c\u5ef6\u8fdf\u901a\u5e38\u5728\u6beb\u79d2\u7ea7\uff0c\u800c\u73b0\u4ee3SSD\u7684\u5ef6\u8fdf\u53ef\u4e0b\u964d\u5230&lt;0.1\u6beb\u79d2\uff08100\u5fae\u79d2\uff09\u751a\u81f3\u66f4\u4f4e\uff0c\u7279\u522b\u662fNVMe SSD\u3002<\/li>\n<li><strong>IOPS\uff08\u6bcf\u79d2\u8f93\u5165\u8f93\u51fa\u64cd\u4f5c\u6570\uff09<\/strong>\uff1aSSD\u5728\u968f\u673a\u5c0fIO\uff084KB\uff09\u573a\u666f\u4e0b\u7684IOPS\u901a\u5e38\u662fHDD\u7684\u6570\u767e\u5230\u6570\u5343\u500d\uff0c\u8fd9\u5bf9\u6570\u636e\u5e93\u548c\u5e76\u53d1\u8bf7\u6c42\u5904\u7406\u81f3\u5173\u91cd\u8981\u3002<\/li>\n<li><strong>\u5e26\u5bbd\uff08Throughput\uff09<\/strong>\uff1a\u987a\u5e8f\u8bfb\u5199\u901f\u5ea6\u5728SATA SSD\u53ef\u8fbe\u51e0\u767eMB\/s\uff0cNVMe SSD\u53ef\u8f7b\u677e\u7a81\u7834GB\/s\u7ea7\u522b\uff0c\u9002\u5408\u5927\u6587\u4ef6\u4f20\u8f93\u4e0e\u5a92\u4f53\u5904\u7406\u3002<\/li>\n<li><strong>\u961f\u5217\u6df1\u5ea6\u4e0e\u5e76\u53d1\uff08Queue Depth\uff09<\/strong>\uff1aNVMe\u534f\u8bae\u652f\u6301\u66f4\u6df1\u7684\u961f\u5217\u548c\u5e76\u884c\u547d\u4ee4\u5904\u7406\uff0c\u80fd\u66f4\u597d\u5229\u7528\u591a\u6838CPU\u4e0e\u5e76\u53d1\u5e94\u7528\u3002<\/li>\n<\/ul>\n<p>\u53e6\u5916\uff0cSSD\u7684\u5185\u90e8\u673a\u5236\uff08\u5982TRIM\u3001\u5783\u573e\u56de\u6536\u3001\u78e8\u635f\u5747\u8861\uff09\u51b3\u5b9a\u4e86\u957f\u671f\u7a33\u5b9a\u6027\u4e0e\u5199\u5165\u653e\u5927\uff08write amplification\uff09\u7684\u63a7\u5236\uff0c\u8fd9\u5bf9\u5199\u5bc6\u96c6\u578b\u670d\u52a1\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n<h3>\u672c\u5730\u76f4\u8fdeSSD\u4e0e\u5206\u5e03\u5f0f\u5b58\u50a8\u7684\u5dee\u5f02<\/h3>\n<p>\u5728\u4e91\u73af\u5883\u4e2d\uff0c\u5b58\u50a8\u53ef\u80fd\u4ee5\u591a\u79cd\u5f62\u5f0f\u63d0\u4f9b\uff1a\u672c\u5730\u76f4\u8fdeSSD\uff08local SSD\/ephemeral\uff09\u3001\u57fa\u4e8e\u7f51\u7edc\u7684\u5757\u5b58\u50a8\uff08iSCSI\u3001Ceph\u3001SAN\uff09\u6216\u6df7\u5408\u65b9\u6848\u3002<strong>\u672c\u5730\u76f4\u8fdeSSD\u5728I\/O\u5ef6\u8fdf\u4e0a\u901a\u5e38\u6700\u4f4e<\/strong>\uff0c\u4f46\u53ef\u80fd\u7f3a\u4e4f\u6301\u4e45\u6027\u4e0e\u7075\u6d3b\u5feb\u7167\uff1b\u5206\u5e03\u5f0f\u5757\u5b58\u50a8\u5219\u63d0\u4f9b\u9ad8\u53ef\u7528\u6027\u3001\u5feb\u7167\u548c\u8fc1\u79fb\u80fd\u529b\uff0c\u4f46\u5728\u968f\u673a\u5ef6\u8fdf\u548c\u6296\u52a8\u4e0a\u53ef\u80fd\u7565\u900a\u4e00\u7b79\u3002\u9009\u62e9\u9999\u6e2fVPS\u6362SSD\u65f6\uff0c\u8981\u4e86\u89e3\u5e95\u5c42\u67b6\u6784\u662f\u672c\u5730NVMe\u3001\u8fd8\u662f\u540e\u7aef\u5171\u4eabSSD\u9635\u5217\u3002<\/p>\n<h2>\u5178\u578b\u5e94\u7528\u573a\u666f\u4e0e\u6027\u80fd\u5f71\u54cd<\/h2>\n<p>\u4ee5\u4e0b\u573a\u666f\u80fd\u591f\u76f4\u89c2\u4f53\u73b0SSD\u6240\u5e26\u6765\u7684\u6027\u80fd\u5dee\u5f02\uff1a<\/p>\n<ul>\n<li><strong>\u6570\u636e\u5e93\u670d\u52a1\u5668\uff08MySQL\u3001PostgreSQL\u3001MongoDB\uff09<\/strong>\uff1a\u6570\u636e\u67e5\u8be2\u4e0e\u7d22\u5f15\u67e5\u627e\u4ee5\u5927\u91cf\u968f\u673a\u5c0fIO\u4e3a\u4e3b\uff0cSSD\u80fd\u663e\u8457\u964d\u4f4e\u67e5\u8be2\u5ef6\u8fdf\u3001\u63d0\u9ad8\u4e8b\u52a1\u541e\u5410\uff08TPM\/\u4e8b\u52a1\u6bcf\u5206\u949f\uff09\u3002<\/li>\n<li><strong>\u7f13\u5b58\u4e0e\u4f1a\u8bdd\u5b58\u50a8\uff08Redis\u3001Memcached\uff09<\/strong>\uff1a\u867d\u7136\u5185\u5b58\u4f18\u5148\uff0c\u4f46\u5f53\u53d1\u751f\u6301\u4e45\u5316\u6216\u5927\u5185\u5b58\u6ea2\u5199\u5230\u78c1\u76d8\u65f6\uff0cSSD\u80fd\u907f\u514d\u963b\u585e\u3002<\/li>\n<li><strong>\u6587\u4ef6\u4e0e\u5a92\u4f53\u5904\u7406<\/strong>\uff1a\u89c6\u9891\u8f6c\u7801\u3001\u5927\u6587\u4ef6\u4e0a\u4f20\/\u4e0b\u8f7d\u5728\u987a\u5e8f\u5e26\u5bbd\u4e0a\u53d7\u76ca\u660e\u663e\uff0cNVMe\u7684\u9ad8\u5e26\u5bbd\u53ef\u7f29\u77ed\u5904\u7406\u94fe\u8def\u3002<\/li>\n<li><strong>\u9ad8\u5e76\u53d1Web\u670d\u52a1<\/strong>\uff1a\u5927\u91cf\u9759\u6001\u8d44\u6e90\u6216CMS\uff08\u5982WordPress\uff09\u5728I\/O\u74f6\u9888\u88ab\u89e3\u9664\u540e\uff0cCPU\/\u7f51\u7edc\u6210\u4e3a\u4e3b\u8981\u9650\u5236\uff0c\u9875\u9762\u54cd\u5e94\u65f6\u95f4\u663e\u8457\u4e0b\u964d\u3002<\/li>\n<li><strong>\u65e5\u5fd7\u805a\u5408\u4e0e\u5927\u6570\u636e\u5199\u5165<\/strong>\uff1a\u65e5\u5fd7\u5199\u5165\u7684\u541e\u5410\u548c\u77ed\u65f6\u5ef6\u5bf9\u5b9e\u65f6\u5206\u6790\u975e\u5e38\u91cd\u8981\uff0cSSD\u80fd\u964d\u4f4e\u4e22\u5305\u548c\u5199\u5165\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h3>\u5730\u57df\u4e0e\u7f51\u7edc\u5ef6\u8fdf\u7684\u914d\u5408<\/h3>\n<p>\u5b58\u50a8\u4f18\u5316\u548c\u7f51\u7edc\u4f18\u5316\u662f\u534f\u540c\u5de5\u4f5c\u7684\u3002\u9009\u62e9\u4f4d\u4e8e\u9999\u6e2f\u7684\u670d\u52a1\u5668\u80fd\u4e3a\u534e\u5357\u3001\u4e1c\u5357\u4e9a\u7528\u6237\u63d0\u4f9b\u66f4\u4f4e\u7684\u7f51\u7edc\u5f80\u8fd4\u65f6\u5ef6\uff08RTT\uff09\uff0c\u800c\u5c06I\/O\u5b50\u7cfb\u7edf\u5347\u7ea7\u4e3a\u9ad8\u6027\u80fdSSD\u5219\u5728\u670d\u52a1\u5668\u7aef\u8fdb\u4e00\u6b65\u538b\u7f29\u54cd\u5e94\u65f6\u95f4\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u90e8\u7f72\u5728\u7f8e\u56fdVPS\u6216\u7f8e\u56fd\u670d\u52a1\u5668\u7684\u5b9e\u4f8b\u5373\u4f7f\u4f7f\u7528\u76f8\u540c\u7684SSD\uff0c\u4e5f\u4f1a\u56e0\u8de8\u6d0b\u94fe\u8def\u5e26\u6765\u66f4\u9ad8\u7684\u7f51\u7edc\u5ef6\u8fdf\uff0c\u5f71\u54cd\u6700\u7ec8\u7528\u6237\u4f53\u9a8c\uff08\u5c24\u5176\u662f\u4ea4\u4e92\u9891\u7e41\u7684\u5e94\u7528\uff09\u3002<\/p>\n<h2>\u4e0e\u4f20\u7edfHDD\u53ca\u4e0d\u540cSSD\u7c7b\u578b\u7684\u7efc\u5408\u6bd4\u8f83<\/h2>\n<p>\u5e02\u573a\u4e0aSSD\u7c7b\u578b\u8f83\u591a\uff0c\u5e38\u89c1\u6709SATA SSD\u3001SAS SSD\u3001NVMe\uff08PCIe\uff09SSD\uff0c\u4ee5\u53ca\u4f01\u4e1a\u7ea7\u4e0e\u6d88\u8d39\u7ea7\u4e4b\u95f4\u7684\u8010\u4e45\u5ea6\u5dee\u5f02\u3002<\/p>\n<ul>\n<li><strong>SATA SSD<\/strong>\uff1a\u517c\u5bb9\u6027\u597d\u3001\u6210\u672c\u8f83\u4f4e\uff0c\u9002\u5408\u8bfb\u5bc6\u96c6\u6216\u4e2d\u7b49\u5199\u5165\u573a\u666f\u3002<\/li>\n<li><strong>NVMe SSD<\/strong>\uff1a\u901a\u8fc7PCIe\u76f4\u63a5\u8bbf\u95ee\u603b\u7ebf\uff0c\u5ef6\u8fdf\u66f4\u4f4e\u3001\u5e76\u53d1\u5904\u7406\u80fd\u529b\u5f3a\uff0c\u9002\u5408\u6570\u636e\u5e93\u3001\u865a\u62df\u5316\u548c\u9ad8\u5e76\u53d1\u670d\u52a1\u3002<\/li>\n<li><strong>\u4f01\u4e1a\u7ea7SSD<\/strong>\uff1a\u5177\u5907\u66f4\u9ad8\u7684TBW\uff08\u5199\u5165\u5bff\u547d\uff09\u3001\u6301\u4e45\u5199\u5165\u6027\u80fd\u548c\u7535\u6e90\u6545\u969c\u4fdd\u62a4\uff08Power-Loss Protection\uff09\uff0c\u9002\u5408\u5173\u952e\u4e1a\u52a1\u3002<\/li>\n<li><strong>\u8f6f\u4ef6\u5c42\u9762\u5f71\u54cd<\/strong>\uff1a\u6587\u4ef6\u7cfb\u7edf\uff08EXT4\u3001XFS\u3001ZFS\uff09\u3001IO\u8c03\u5ea6\u5668\uff08noop\u3001deadline\u3001cfq\uff09\u53ca\u6302\u8f7d\u53c2\u6570\uff08noatime\u3001data=writeback\/ordered\uff09\u90fd\u4f1a\u5f71\u54cdSSD\u8868\u73b0\u3002ZFS\u867d\u7136\u529f\u80fd\u5f3a\u5927\uff0c\u4f46\u5bf9\u5185\u5b58\u548c\u5199\u5165\u6a21\u5f0f\u654f\u611f\uff1b\u5bf9SSD\u5e94\u914d\u5408\u5408\u9002\u7684ARC\/L2ARC\u4e0eZIL\uff08SLOG\uff09\u8bbe\u5907\u8bbe\u8ba1\u3002<\/li>\n<\/ul>\n<h3>\u5b9e\u9645\u6027\u80fd\u8bc4\u4f30\u8981\u70b9<\/h3>\n<p>\u5728\u8bc4\u4f30SSD\u5347\u7ea7\u6548\u679c\u65f6\uff0c\u63a8\u8350\u5173\u6ce8\u8fd9\u4e9b\u6307\u6807\uff1a<\/p>\n<ul>\n<li>4KB\u968f\u673a\u8bfb\u5199\u7684IOPS\u4e0e\u5ef6\u8fdf\uff08p95\u3001p99\u5ef6\u8fdf\uff09\uff0c\u800c\u975e\u4ec5\u770b\u987a\u5e8f\u541e\u5410\u3002<\/li>\n<li>\u5728\u771f\u5b9e\u5de5\u4f5c\u8d1f\u8f7d\uff08sysbench\u3001pgbench\u3001fio 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