{"id":16149,"date":"2025-12-23T11:53:06","date_gmt":"2025-12-23T10:53:06","guid":{"rendered":"https:\/\/webhosting.de\/io-scheduler-linux-noop-mq-deadline-bfq-serverboost\/"},"modified":"2025-12-23T11:53:06","modified_gmt":"2025-12-23T10:53:06","slug":"io%e3%82%b9%e3%82%b1%e3%82%b8%e3%83%a5%e3%83%bc%e3%83%a9-linux-noop-mq-deadline-bfq-serverboost","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/io-scheduler-linux-noop-mq-deadline-bfq-serverboost\/","title":{"rendered":"I\/O \u30b9\u30b1\u30b8\u30e5\u30fc\u30e9 Linux\uff1aNoop\u3001mq-deadline\u3001BFQ \u306e\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308b\u8aac\u660e"},"content":{"rendered":"<p>I\/O \u30b9\u30b1\u30b8\u30e5\u30fc\u30e9 Linux \u306f\u3001\u30b7\u30b9\u30c6\u30e0\u304c SSD\u3001NVMe\u3001\u304a\u3088\u3073 HDD \u3078\u306e\u8aad\u307f\u53d6\u308a\u304a\u3088\u3073\u66f8\u304d\u8fbc\u307f\u30a2\u30af\u30bb\u30b9\u3092\u3069\u306e\u3088\u3046\u306b\u30bd\u30fc\u30c8\u3057\u3001\u512a\u5148\u9806\u4f4d\u4ed8\u3051\u3057\u3001\u30c7\u30d0\u30a4\u30b9\u306b\u9001\u4fe1\u3059\u308b\u304b\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u5b9f\u8df5\u7684\u306a\u89b3\u70b9\u304b\u3089\u3001\u3044\u3064 <strong>Noop<\/strong>, <strong>mq-\u30c7\u30c3\u30c9\u30e9\u30a4\u30f3<\/strong> \u305d\u3057\u3066 <strong>BFQ<\/strong> \u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3044\u3066\u6700\u826f\u306e\u9078\u629e\u3067\u3042\u308b \u2013 \u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3001\u30c6\u30b9\u30c8\u3001\u660e\u78ba\u306a\u30a2\u30af\u30b7\u30e7\u30f3\u30b9\u30c6\u30c3\u30d7\u3092\u542b\u3080\u3002.<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n\n<ul>\n  <li><strong>Noop<\/strong>: SSD\/NVMe \u304a\u3088\u3073 VM \u3067\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u307e\u3059\u3002<\/li>\n  <li><strong>mq-\u30c7\u30c3\u30c9\u30e9\u30a4\u30f3<\/strong>: \u30b5\u30fc\u30d0\u30fc\u5411\u3051\u306e\u30d0\u30e9\u30f3\u30b9\u306e\u3068\u308c\u305f\u30ec\u30a4\u30c6\u30f3\u30b7\u3068\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8<\/li>\n  <li><strong>BFQ<\/strong>: \u30de\u30eb\u30c1\u30e6\u30fc\u30b6\u30fc\u306b\u304a\u3051\u308b\u516c\u5e73\u6027\u3068\u8fc5\u901f\u306a\u5bfe\u5fdc<\/li>\n  <li><strong>blk-mq<\/strong>: \u73fe\u4ee3\u7684\u306a\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306e\u305f\u3081\u306e\u30de\u30eb\u30c1\u30ad\u30e5\u30fc\u8a2d\u8a08<\/li>\n  <li><strong>\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0<\/strong>: \u56fa\u5b9a\u30eb\u30fc\u30eb\u3067\u306f\u306a\u304f\u3001\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u3054\u3068\u306e\u30c6\u30b9\u30c8<\/li>\n<\/ul>\n\n<h2>Linux \u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308b I\/O \u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306e\u6a5f\u80fd<\/h2>\n\n<p>Linux I\/O\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306f\u3001I\/O\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u30ad\u30e5\u30fc\u306b\u5272\u308a\u5f53\u3066\u3001\u30de\u30fc\u30b8\u3092\u5b9f\u884c\u3057\u3001\u30c7\u30d0\u30a4\u30b9\u3078\u306e\u914d\u4fe1\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002 <strong>\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc<\/strong> \u3092\u524a\u6e1b\u3057\u3001\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002\u6700\u65b0\u306e\u30ab\u30fc\u30cd\u30eb\u306f\u3001\u8907\u6570\u306e CPU \u30b3\u30a2\u304c\u4e26\u884c\u3057\u3066 I\/O \u3092\u8d77\u52d5\u3067\u304d\u308b\u3088\u3046\u306b\u3001blk-mq\u3001\u3064\u307e\u308a\u30de\u30eb\u30c1\u30ad\u30e5\u30fc\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u591a\u304f\u306e\u30ad\u30e5\u30fc\u3068\u9ad8\u3044\u4e26\u884c\u6027\u3092\u63d0\u4f9b\u3057\u3001\u30ad\u30e5\u30fc\u3092\u77ed\u7e2e\u3059\u308b NVMe SSD \u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002 \u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3067\u306f\u3001\u591a\u304f\u306e\u5834\u5408\u3001\u5e45\u5e83\u3044\u6df7\u5408\u8ca0\u8377\u304c\u767a\u751f\u3057\u307e\u3059\u3002Web \u30b5\u30fc\u30d0\u30fc\u306f\u591a\u304f\u306e\u5c0f\u3055\u306a\u8aad\u307f\u53d6\u308a\u3092\u5b9f\u884c\u3057\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u540c\u671f\u66f8\u304d\u8fbc\u307f\u3092\u751f\u6210\u3057\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306f\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306f\u3001\u8f3b\u8f33\u3092\u8efd\u6e1b\u3057\u3001\u5fdc\u7b54\u6642\u9593\u3092\u5b89\u5b9a\u3055\u305b\u3001\u4fdd\u8b77\u3057\u307e\u3059\u3002 <strong>\u30b5\u30fc\u30d0\u30fc<\/strong>\u8ca0\u8377\u4e0b\u3067\u306e\u7d4c\u9a13\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/12\/linux-io-scheduler-hosting-8391.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>blk-mq \u306e\u5b9f\u8df5\uff1anone \u5bfe noop \u304a\u3088\u3073\u30ab\u30fc\u30cd\u30eb\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a<\/h2>\n\n<p>\u30ab\u30fc\u30cd\u30eb 5.x \u4ee5\u964d\u3001\u30de\u30eb\u30c1\u30ad\u30e5\u30fc\u8a2d\u8a08\u304c\u6a19\u6e96\u30d1\u30b9\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u8a2d\u8a08\u3067\u306f\u3001 <strong>\u306a\u3057<\/strong> blk-mq \u306e\u300cNoop\u300d\u306b\u76f8\u5f53\u3059\u308b\u3082\u306e\u3067\u3001 <strong>noop<\/strong> \u6b74\u53f2\u7684\u306b\u306f\u30b7\u30f3\u30b0\u30eb\u30ad\u30e5\u30fc\u30d1\u30b9\u306b\u7531\u6765\u3057\u307e\u3059\u3002NVMe \u30c7\u30d0\u30a4\u30b9\u3067\u306f\u3001\u307b\u3068\u3093\u3069\u306e\u5834\u5408 <code>\u306a\u3057<\/code> \u5229\u7528\u53ef\u80fd\u3002SATA\/SAS \u3067\u306f\u3088\u304f\u898b\u3089\u308c\u308b\u3002 <code>mq-\u30c7\u30c3\u30c9\u30e9\u30a4\u30f3<\/code>, \u3001\u30aa\u30d7\u30b7\u30e7\u30f3 <code>bfq<\/code> \u307e\u305f\u3001\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u306b\u3088\u3063\u3066\u306f <code>kyber<\/code>. \u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u69d8\u3005\u3067\u3059\u3002NVMe \u306f\u901a\u5e38\u3001 <code>\u306a\u3057<\/code>, \u3001SCSI\/SATA \u306f\u591a\u304f\u306e\u5834\u5408 <code>mq-\u30c7\u30c3\u30c9\u30e9\u30a4\u30f3<\/code>. \u305d\u306e\u305f\u3081\u3001\u79c1\u306f\u5e38\u306b\u5229\u7528\u53ef\u80fd\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u3092 <code>cat \/sys\/block\/\/queue\/scheduler<\/code> \u305d\u3057\u3066\u3001\u30c7\u30d0\u30a4\u30b9\u3054\u3068\u306b\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u3069\u3053\u3060\u3051 <code>\u306a\u3057<\/code> \u9078\u629e\u53ef\u80fd\u3067\u3042\u308b\u306e\u306f\u610f\u56f3\u7684\u306a\u3082\u306e\u3067\u3059\u3002\u8ffd\u52a0\u306e\u30bd\u30fc\u30c8\u306f\u3001\u5b9f\u8cea\u7684\u306b\u4f55\u306e\u4ed8\u52a0\u4fa1\u5024\u3082\u751f\u307e\u306a\u3044\u304b\u3089\u3067\u3059\u3002.<\/p>\n\n<h2>\u30b5\u30fc\u30d0\u30fc\u3067\u306eNoop\u306e\u4f7f\u7528\uff1a\u30df\u30cb\u30de\u30ea\u30ba\u30e0\u304c\u52dd\u3064\u3068\u304d<\/h2>\n\n<p>Noop \u306f\u4e3b\u306b\u96a3\u63a5\u3059\u308b\u30d6\u30ed\u30c3\u30af\u306e\u7d50\u5408\u3092\u5b9f\u884c\u3057\u307e\u3059\u304c\u3001\u30bd\u30fc\u30c8\u306f\u5b9f\u884c\u3057\u306a\u3044\u305f\u3081\u3001CPU \u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u975e\u5e38\u306b\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002 <strong>\u30ed\u30fc<\/strong> SSD \u304a\u3088\u3073 NVMe \u3067\u306f\u3001\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u3068\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u304c\u8ce2\u3044\u9806\u5e8f\u3092\u51e6\u7406\u3059\u308b\u305f\u3081\u3001\u30ab\u30fc\u30cd\u30eb\u3067\u8ffd\u52a0\u306e\u30bd\u30fc\u30c8\u3092\u884c\u3046\u3053\u3068\u306f\u307b\u3068\u3093\u3069\u610f\u5473\u304c\u3042\u308a\u307e\u305b\u3093\u3002 VM \u3084\u30b3\u30f3\u30c6\u30ca\u3067\u306f\u3001\u30cf\u30a4\u30d1\u30fc\u30d0\u30a4\u30b6\u30fc\u304c\u5168\u4f53\u7684\u306a\u8a08\u753b\u3092\u7acb\u3066\u308b\u305f\u3081\u3001\u79c1\u306f\u3088\u304f Noop \u3092\u8a08\u753b\u3057\u307e\u3059\u3002\u56de\u8ee2\u30c7\u30a3\u30b9\u30af\u3067\u306f\u3001\u30bd\u30fc\u30c8\u3092\u884c\u308f\u306a\u3044\u3068\u30b7\u30fc\u30af\u6642\u9593\u304c\u9577\u304f\u306a\u308b\u305f\u3081\u3001Noop \u306f\u4f7f\u7528\u3057\u307e\u305b\u3093\u3002\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u78ba\u5b9f\u306b\u533a\u5225\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u307e\u305a\u30e1\u30e2\u30ea\u306e\u30bf\u30a4\u30d7\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u3053\u3067\u306f\u3001\u4ee5\u4e0b\u3092\u78ba\u8a8d\u3059\u308b\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002 <a href=\"https:\/\/webhosting.de\/ja\/nvme-ssd-hdd-%e3%82%a6%e3%82%a7%e3%83%96%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0-%e6%af%94%e8%bc%83-%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%b3%e3%82%b9-%e3%82%b3%e3%82%b9\/\">NVMe\u3001SSD\u3001HDD<\/a>, \u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u3092\u8d77\u52d5\u3059\u308b\u524d\u306b <strong>festlege<\/strong>.<\/p>\n\n<h2>mq-deadline\uff1a\u671f\u9650\u3001\u9806\u5e8f\u3001\u660e\u78ba\u306a\u512a\u5148\u9806\u4f4d<\/h2>\n\n<p>mq-deadline \u306f\u3001\u8aad\u307f\u53d6\u308a\u30a2\u30af\u30bb\u30b9\u306b\u77ed\u3044\u30c7\u30c3\u30c9\u30e9\u30a4\u30f3\u3092\u8a2d\u5b9a\u3057\u3001\u66f8\u304d\u8fbc\u307f\u30a2\u30af\u30bb\u30b9\u306b\u306f\u3082\u3046\u5c11\u3057\u9577\u3044\u5f85\u3061\u6642\u9593\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002 <strong>\u5fdc\u7b54\u6642\u9593<\/strong> \u9855\u8457\u306b\u78ba\u4fdd\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306f\u30d6\u30ed\u30c3\u30af\u30a2\u30c9\u30ec\u30b9\u3067\u30bd\u30fc\u30c8\u3059\u308b\u305f\u3081\u3001\u691c\u7d22\u6642\u9593\u304c\u77ed\u7e2e\u3055\u308c\u3001\u7279\u306b HDD \u3084 RAID \u30a2\u30ec\u30a4\u306b\u6709\u52b9\u3067\u3059\u3002Web \u304a\u3088\u3073\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30db\u30b9\u30c8\u3067\u306f\u3001mq-deadline \u306f\u30ec\u30a4\u30c6\u30f3\u30b7\u3068\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u306e\u30d0\u30e9\u30f3\u30b9\u306b\u512a\u308c\u3066\u3044\u307e\u3059\u3002 \u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u304c\u6df7\u5728\u3057\u3001\u8aad\u307f\u53d6\u308a\u3068\u66f8\u304d\u8fbc\u307f\u306e\u4e21\u65b9\u304c\u7d99\u7d9a\u7684\u306b\u767a\u751f\u3057\u3066\u3044\u308b\u5834\u5408\u306b\u3001\u3053\u306e\u6a5f\u80fd\u3092\u4f7f\u7528\u3059\u308b\u306e\u304c\u597d\u304d\u3067\u3059\u3002\u5fae\u8abf\u6574\u306e\u305f\u3081\u306b\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u6df1\u3055\u3001\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u306e\u52d5\u4f5c\u3001\u304a\u3088\u3073\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u3001\u30c7\u30c3\u30c9\u30e9\u30a4\u30f3\u30ed\u30b8\u30c3\u30af\u304c\u5e38\u306b\u4e00\u8cab\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002 <strong>\u30b0\u30e9\u30d6<\/strong>.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/12\/linux_io_scheduler_meeting_4273.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>BFQ\uff1a\u591a\u6570\u306e\u540c\u6642\u30e6\u30fc\u30b6\u30fc\u306b\u5bfe\u3059\u308b\u516c\u5e73\u6027\u3068\u5fdc\u7b54\u6027<\/h2>\n\n<p>BFQ \u306f\u5e2f\u57df\u5e45\u3092\u6bd4\u4f8b\u7684\u306b\u5206\u914d\u3057\u3001\u30d7\u30ed\u30bb\u30b9\u3054\u3068\u306b\u4e88\u7b97\u3092\u5272\u308a\u5f53\u3066\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001 <strong>\u30d5\u30a7\u30a2<\/strong> \u591a\u304f\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u540c\u6642\u306b I\/O \u3092\u751f\u6210\u3059\u308b\u5834\u5408\u306b\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002\u7ba1\u7406\u30b7\u30a7\u30eb\u3001\u30a8\u30c7\u30a3\u30bf\u3001API \u30b3\u30fc\u30eb\u306a\u3069\u306e\u5bfe\u8a71\u578b\u30bf\u30b9\u30af\u306f\u3001\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u3067\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u304c\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3067\u3082\u3001\u9ad8\u901f\u306b\u52d5\u4f5c\u3057\u7d9a\u3051\u307e\u3059\u3002 BFQ \u306f\u3001\u30b7\u30fc\u30b1\u30f3\u30b7\u30e3\u30eb\u30d5\u30a7\u30fc\u30ba\u3092\u6d3b\u7528\u3057\u3001\u77ed\u3044\u30a2\u30a4\u30c9\u30eb\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u8ce2\u304f\u5229\u7528\u3059\u308b\u305f\u3081\u3001HDD \u3067\u306f\u9ad8\u3044\u52b9\u7387\u3092\u767a\u63ee\u3059\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002\u975e\u5e38\u306b\u9ad8\u901f\u306a SSD \u3067\u306f\u3001\u308f\u305a\u304b\u306a\u8ffd\u52a0\u30b3\u30b9\u30c8\u304c\u767a\u751f\u3057\u307e\u3059\u304c\u3001\u305d\u308c\u306f\u9855\u8457\u306a\u53cd\u5fdc\u6027\u306e\u5411\u4e0a\u3068\u76f8\u6bba\u3055\u308c\u308b\u3068\u601d\u3044\u307e\u3059\u3002Cgroups \u304a\u3088\u3073 ioprio \u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001BFQ \u3092\u4f7f\u7528\u3057\u3066\u660e\u78ba\u306a\u4fdd\u8a3c\u3092\u78ba\u7acb\u3057\u3001\u9a12\u304c\u3057\u3044\u96a3\u4eba\u306b\u3088\u308b\u30c8\u30e9\u30d6\u30eb\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <strong>\u907f\u3051\u308b<\/strong>.<\/p>\n\n<h2>\u65e5\u5e38\u306b\u304a\u3051\u308bQoS\uff1aioprio\u3001ionice\u3001\u304a\u3088\u3073BFQ\u3092\u5099\u3048\u305fCgroups v2<\/h2>\n\n<p>\u30af\u30ea\u30fc\u30f3\u7528 <strong>\u512a\u5148\u9806\u4f4d\u4ed8\u3051<\/strong> BFQ \u3092\u30d7\u30ed\u30bb\u30b9\u304a\u3088\u3073 Cgroup \u30eb\u30fc\u30eb\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u3044\u307e\u3059\u3002\u30d7\u30ed\u30bb\u30b9\u30ec\u30d9\u30eb\u3067\u306f\u3001 <code>ionice<\/code> \u30af\u30e9\u30b9\u3068\u512a\u5148\u9806\u4f4d\uff1a <code>ionice -c1<\/code> \uff08\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\uff09\u30ec\u30a4\u30c6\u30f3\u30b7\u304c\u91cd\u8981\u306a\u8aad\u307f\u53d6\u308a\u7528, <code>ionice -c2 -n7<\/code> \uff08\u30d9\u30b9\u30c8\u30a8\u30d5\u30a9\u30fc\u30c8\u3001\u4f4e\uff09\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3084\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5b9f\u884c\u7528, <code>ionice -c3<\/code> (\u30a2\u30a4\u30c9\u30eb) \u306f\u3001\u30a2\u30a4\u30c9\u30eb\u6642\u9593\u306e\u307f\u306b\u5b9f\u884c\u3059\u3079\u304d\u3082\u306e\u3059\u3079\u3066\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002Cgroups v2 \u3067\u306f\u3001\u79c1\u306f <code>io.weight<\/code> \u76f8\u5bfe\u7684\u306a\u5272\u5408\uff08\u4f8b\uff1a100 \u5bfe 1000\uff09\u304a\u3088\u3073 <code>io.max<\/code> \u53b3\u3057\u3044\u5236\u9650\u306b\u3064\u3044\u3066\u3001\u4f8b\u3048\u3070 <code>echo \"259:0 rbps=50M wbps=20M\" &gt; \/sys\/fs\/cgroup\/\/io.max<\/code>. BFQ \u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u91cd\u307f\u304c\u5e2f\u57df\u5e45\u306e\u5272\u5408\u306b\u975e\u5e38\u306b\u6b63\u78ba\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u5171\u6709\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3084\u30b3\u30f3\u30c6\u30ca\u30db\u30b9\u30c8\u306b\u6700\u9069\u3067\u3059\u3002 <strong>\u516c\u5e73\u6027<\/strong> \u6700\u5927\u51fa\u529b\u3088\u308a\u3082\u91cd\u8981\u306a\u3082\u306e\u3002.<\/p>\n\n<h2>\u5b9f\u8df5\u6bd4\u8f03\uff1a\u3069\u306e\u9078\u629e\u80a2\u304c\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u9069\u3057\u3066\u3044\u308b\u304b<\/h2>\n\n<p>\u9078\u629e\u306f\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u30bf\u30a4\u30d7\u3068\u30ad\u30e5\u30fc\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u5927\u304d\u304f\u4f9d\u5b58\u3059\u308b\u305f\u3081\u3001\u307e\u305a\u4ee5\u4e0b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002 <strong>\u88c5\u7f6e<\/strong> \u304a\u3088\u3073\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u3002SSD \u304a\u3088\u3073 NVMe \u306f\u3001\u307b\u3068\u3093\u3069\u306e\u5834\u5408 Noop\/none \u306e\u6069\u6075\u3092\u53d7\u3051\u3001HDD \u306f mq-deadline \u307e\u305f\u306f BFQ \u3067\u3088\u308a\u5186\u6ed1\u306b\u52d5\u4f5c\u3057\u307e\u3059\u3002RAID \u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3001SAN\u3001\u304a\u3088\u3073\u30aa\u30fc\u30eb\u30e9\u30a6\u30f3\u30c9\u30db\u30b9\u30c8\u3067\u306f\u3001\u30c7\u30c3\u30c9\u30e9\u30a4\u30f3\u30ed\u30b8\u30c3\u30af\u3068\u30bd\u30fc\u30c8\u304c\u8abf\u548c\u3059\u308b\u305f\u3081\u3001\u79c1\u306f mq-deadline \u3092\u597d\u3093\u3067\u4f7f\u7528\u3057\u307e\u3059\u3002 \u591a\u304f\u306e\u5bfe\u8a71\u578b\u30bb\u30c3\u30b7\u30e7\u30f3\u304c\u3042\u308b\u30de\u30eb\u30c1\u30e6\u30fc\u30b6\u30fc\u74b0\u5883\u3067\u306f\u3001BFQ \u304c\u6709\u5229\u306b\u306a\u308b\u5834\u5408\u304c\u591a\u3044\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u8868\u306f\u3001\u305d\u306e\u9577\u6240\u3068\u9069\u5207\u306a\u4f7f\u7528\u5206\u91ce\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u307e\u3068\u3081\u305f\u3082\u306e\u3067\u3059\u3002 <strong>\u4e00\u7dd2\u306b<\/strong>:<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9<\/th>\n      <th>\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2<\/th>\n      <th>\u5f37\u307f<\/th>\n      <th>\u5f31\u70b9<\/th>\n      <th>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306e\u30b7\u30ca\u30ea\u30aa<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>Noop\/\u306a\u3057<\/td>\n      <td>SSD\u3001NVMe\u3001VM<\/td>\n      <td>\u6700\u5c0f\u9650\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3001\u30af\u30ea\u30fc\u30f3\u306a\u30de\u30fc\u30b8<\/td>\n      <td>HDD\u4e0a\u3067\u30bd\u30fc\u30c8\u3092\u884c\u308f\u306a\u3044\u3068\u4e0d\u5229\u306b\u306a\u308b<\/td>\n      <td>\u30d5\u30e9\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u30fc\u3001\u30b3\u30f3\u30c6\u30ca\u3001\u30cf\u30a4\u30d1\u30fc\u30d0\u30a4\u30b6\u30fc\u5236\u5fa1<\/td>\n    <\/tr>\n    <tr>\n      <td>mq-\u30c7\u30c3\u30c9\u30e9\u30a4\u30f3<\/td>\n      <td>HDD\u3001RAID\u3001\u30aa\u30fc\u30eb\u30e9\u30a6\u30f3\u30c9\u30b5\u30fc\u30d0\u30fc<\/td>\n      <td>\u53b3\u683c\u306a\u8aad\u307f\u53d6\u308a\u512a\u5148\u5ea6\u3001\u30bd\u30fc\u30c8\u3001\u5b89\u5b9a\u3057\u305f\u30ec\u30a4\u30c6\u30f3\u30b7<\/td>\n      <td>Noop\u3088\u308a\u3082\u8ad6\u7406\u7684<\/td>\n      <td>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3001Web\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3001\u6df7\u5408\u8ca0\u8377<\/td>\n    <\/tr>\n    <tr>\n      <td>BFQ<\/td>\n      <td>HDD\u3001\u30de\u30eb\u30c1\u30e6\u30fc\u30b6\u30fc\u3001\u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u578b\u30db\u30b9\u30c8<\/td>\n      <td>\u516c\u5e73\u6027\u3001\u53cd\u5fdc\u306e\u826f\u3055\u3001\u512a\u308c\u305f\u30b7\u30fc\u30b1\u30f3\u30b9<\/td>\n      <td>\u8d85\u9ad8\u901fSSD\u3067\u306f\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u82e5\u5e72\u5897\u52a0<\/td>\n      <td>\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u30b5\u30fc\u30d3\u30b9\u3001\u5171\u6709\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3001\u958b\u767a\u30b5\u30fc\u30d0\u30fc<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/12\/linux-io-scheduler-hosting-4397.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u8a2d\u5b9a\uff1a\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u3092\u78ba\u8a8d\u3057\u3001\u6c38\u7d9a\u7684\u306b\u8a2d\u5b9a\u3059\u308b<\/h2>\n\n<p>\u307e\u305a\u3001\u3069\u306e\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u304c\u30a2\u30af\u30c6\u30a3\u30d6\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u6b21\u306e\u3088\u3046\u306b\u5165\u529b\u3057\u307e\u3059\u3002 <code>cat \/sys\/block\/sdX\/queue\/scheduler<\/code>, \u3001\u305d\u3057\u3066\u305d\u308c\u3092\u66f8\u304d\u7559\u3081\u3066\u304f\u3060\u3055\u3044\u3002 <strong>\u30aa\u30d7\u30b7\u30e7\u30f3<\/strong> \u89d2\u62ec\u5f27\u3067\u56f2\u307f\u307e\u3059\u3002\u4e00\u6642\u7684\u306b\u5909\u66f4\u3059\u308b\u306b\u306f\u3001\u4f8b\u3048\u3070\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002 <code>echo mq-deadline | sudo tee \/sys\/block\/sdX\/queue\/scheduler<\/code>. \u3002\u6c38\u7d9a\u7684\u306a\u8a2d\u5b9a\u306b\u306f\u3001udev \u30eb\u30fc\u30eb\u3084\u30ab\u30fc\u30cd\u30eb\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002 <code>scsi_mod.use_blk_mq=1<\/code> \u305d\u3057\u3066 <code>mq-\u30c7\u30c3\u30c9\u30e9\u30a4\u30f3<\/code> \u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u3067\u3002NVMe \u30c7\u30d0\u30a4\u30b9\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u30d1\u30b9\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002 <code>\/sys\/block\/nvme0n1\/queue\/<\/code> \u305d\u3057\u3066\u3001\u30c7\u30d0\u30a4\u30b9\u3054\u3068\u306b\u9078\u629e\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u91cd\u8981\uff1a\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3084\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u306e\u969b\u306b\u63a8\u6e2c\u3067\u4f5c\u696d\u3059\u308b\u3053\u3068\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u3001\u5909\u66f4\u5185\u5bb9\u3092\u8a18\u9332\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u6210\u529f\u3059\u308b<\/strong>.<\/p>\n\n<h2>\u904b\u7528\u306b\u304a\u3051\u308b\u6301\u7d9a\u6027\u3068\u81ea\u52d5\u5316<\/h2>\n\n<p>\u65e5\u5e38\u3067\u306f\u3001\u81ea\u52d5\u5316\u3088\u308a\u3082\u518d\u73fe\u6027\u3092\u91cd\u8996\u3057\u3066\u3044\u307e\u3059\u30023\u3064\u306e\u65b9\u6cd5\u304c\u52b9\u679c\u7684\u3067\u3042\u308b\u3053\u3068\u304c\u8a3c\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n  <li><strong>udev\u30eb\u30fc\u30eb<\/strong>: \u3059\u3079\u3066\u306e HDD \u306e\u4f8b (\u56de\u8ee2=1) <code>echo 'ACTION==\"add|change\", KERNEL==\"sd*\", ATTR{queue\/rotational}==\"1\", ATTR{queue\/scheduler}=\"mq-deadline\"' &gt; \/etc\/udev\/rules.d\/60-io-scheduler.rules<\/code>, \u3001\u305d\u308c\u304b\u3089 <code>udevadm control --reload-rules &amp;&amp; udevadm trigger<\/code>.<\/li>\n  <li><strong>systemd-tmpfiles<\/strong>\u7279\u5b9a\u306e\u30c7\u30d0\u30a4\u30b9\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002 <code>\/etc\/tmpfiles.d\/blk.conf<\/code> \u6b21\u306e\u3088\u3046\u306a\u884c\u3067 <code>w \/sys\/block\/sdX\/queue\/scheduler - - - - mq-deadline<\/code>, \u30d6\u30fc\u30c8\u6642\u306b\u66f8\u304d\u8fbc\u3080\u3082\u306e\u3002.<\/li>\n  <li><strong>\u69cb\u6210\u7ba1\u7406<\/strong>Ansible\/Salt \u3067\u30c7\u30d0\u30a4\u30b9\u30af\u30e9\u30b9\uff08NVMe\u3001HDD\uff09\u3092\u4f5c\u6210\u3057\u3001\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3084\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u542b\u3080\u4e00\u8cab\u3057\u305f\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u3092\u914d\u5e03\u3057\u307e\u3059\u3002.<\/li>\n<\/ul>\n<p>\u6ce8\uff1a <code>\u30a8\u30ec\u30d9\u30fc\u30bf\u30fc=<\/code> \u30ab\u30fc\u30cd\u30eb\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u3001\u53e4\u3044\u30b7\u30f3\u30b0\u30eb\u30ad\u30e5\u30fc\u30d1\u30b9\u306b\u9069\u7528\u3055\u308c\u307e\u3057\u305f\u3002blk-mq \u3067\u306f\u3001\u9078\u629e\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002 <strong>1\u53f0\u3042\u305f\u308a<\/strong>. \u30b9\u30bf\u30c3\u30af\uff08dm-crypt\u3001LVM\u3001MD\uff09\u3067\u306f\u3001\u30c8\u30c3\u30d7\u30c7\u30d0\u30a4\u30b9\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n<h2>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308b\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\uff1a\u30d1\u30bf\u30fc\u30f3\u3092\u8a8d\u8b58\u3057\u3001\u9069\u5207\u306b\u5bfe\u51e6\u3059\u308b<\/h2>\n\n<p>\u307e\u305a\u3001\u8ca0\u8377\u3092\u5206\u6790\u3057\u307e\u3059\u3002\u591a\u304f\u306e\u5c0f\u3055\u306a\u8aad\u307f\u53d6\u308a\u306f Web \u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u3001\u540c\u671f\u306e\u591a\u3044\u66f8\u304d\u8fbc\u307f\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3084\u30ed\u30b0\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3001\u5927\u304d\u306a\u9806\u6b21\u30b9\u30c8\u30ea\u30fc\u30e0\u306f\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3084 <strong>\u30a2\u30fc\u30ab\u30a4\u30d6<\/strong>. \u30c4\u30fc\u30eb\u3068\u3057\u3066\u306f\u3001 <code>iostat<\/code>, <code>vmstat<\/code> \u305d\u3057\u3066 <code>blktrace<\/code> \u30ad\u30e5\u30fc\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u3001\u30de\u30fc\u30b8\u52b9\u679c\u3092\u793a\u3057\u307e\u3059\u3002I\/O \u306b\u3088\u308b\u9855\u8457\u306a CPU \u30a2\u30a4\u30c9\u30eb\u6642\u9593\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002 <a href=\"https:\/\/webhosting.de\/ja\/io-wait-%e3%82%92%e7%90%86%e8%a7%a3%e3%81%99%e3%82%8b-%e3%83%a1%e3%83%a2%e3%83%aa%e3%83%9c%e3%83%88%e3%83%ab%e3%83%8d%e3%83%83%e3%82%af%e3%81%ae%e8%a7%a3%e6%b6%88-%e6%9c%80%e9%81%a9%e5%8c%96\/\">I\/O\u5f85\u6a5f\u3092\u7406\u89e3\u3059\u308b<\/a>, \u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u4f53\u7cfb\u7684\u306b\u89e3\u6d88\u3059\u308b\u305f\u3081\u3067\u3059\u3002\u305d\u306e\u5f8c\u30011\uff5e2\u4eba\u306e\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u30fc\u5019\u88dc\u8005\u3092\u540c\u4e00\u306e\u6642\u9593\u67a0\u3067\u30c6\u30b9\u30c8\u3057\u307e\u3059\u3002\u76f4\u611f\u3067\u306f\u306a\u304f\u3001\u6e2c\u5b9a\u7d50\u679c\u306b\u3088\u3063\u3066\u6c7a\u5b9a\u3057\u307e\u3059\u3002 <strong>\u795e\u8a71<\/strong>.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/12\/linux_scheduler_hosting_4827.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u6e2c\u5b9a\u624b\u6cd5\u306e\u6df1\u5316\uff1a\u518d\u73fe\u6027\u306e\u3042\u308b\u30d9\u30f3\u30c1\u30de\u30fc\u30af<\/h2>\n\n<p>\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u610f\u601d\u6c7a\u5b9a\u306e\u305f\u3081\u306b\u3001\u79c1\u306f\u7ba1\u7406\u3055\u308c\u305f <strong>fio<\/strong>-\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3001\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30c6\u30b9\u30c8\u3067\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n  <li><strong>\u30e9\u30f3\u30c0\u30e0\u30ea\u30fc\u30c9<\/strong> (\u30a6\u30a7\u30d6\/\u30ad\u30e3\u30c3\u30b7\u30e5): <code>fio --name=rr --rw=randread --bs=4k --iodepth=32 --numjobs=4 --runtime=120 --time_based --filename=\/mnt\/testfile --direct=1<\/code><\/li>\n  <li><strong>\u30e9\u30f3\u30c0\u30e0\u30df\u30c3\u30af\u30b9<\/strong> (DB): <code>fio --name=randmix --rw=randrw --rwmixread=70 --bs=8k --iodepth=64 --numjobs=8 --runtime=180 --time_based --direct=1<\/code><\/li>\n  <li><strong>\u9806\u6b21<\/strong> (\u30d0\u30c3\u30af\u30a2\u30c3\u30d7): <code>fio --name=seqw --rw=write --bs=1m --iodepth=128 --numjobs=2 --runtime=120 --time_based --direct=1<\/code><\/li>\n<\/ul>\n<p>\u540c\u6642\u306b\u3001\u79c1\u306f\u30ed\u30b0\u30a4\u30f3\u3057\u307e\u3059\u3002 <code>iostat -x 1<\/code>, <code>pidstat -d 1<\/code> P95\/P99\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u8a18\u9332\u3059\u308b <code>fio<\/code>. \u8a73\u7d30\u306a\u8a3a\u65ad\u306b\u306f\u3001\u79c1\u306f <code>blktrace<\/code> \u307e\u305f\u306f eBPF \u30c4\u30fc\u30eb\u306a\u3069 <code>\u30d0\u30a4\u30aa\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc<\/code> \u91cd\u8981\uff1a\u79c1\u306f\u540c\u3058\u6642\u9593\u5e2f\u3001\u540c\u3058\u8ca0\u8377\u30a6\u30a3\u30f3\u30c9\u30a6\u3001\u540c\u3058\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3067\u6e2c\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5f71\u97ff\u306f\u3001 <code>direct=1<\/code> \u304a\u3088\u3073\u30af\u30ea\u30fc\u30f3\u306a\u4e8b\u524d\u6761\u4ef6\uff08\u4f8b\uff1a\u30dc\u30ea\u30e5\u30fc\u30e0\u306e\u4e8b\u524d\u5165\u529b\uff09\u3002.<\/p>\n\n<h2>\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3068I\/O\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\uff1a\u76f8\u4e92\u4f5c\u7528\u304c\u91cd\u8981\u3067\u3059<\/h2>\n\n<p>\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306fI\/O\u306e\u7279\u6027\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u305f\u3081\u3001\u30b8\u30e3\u30fc\u30ca\u30eb\u30e2\u30fc\u30c9\u3001\u30ad\u30e5\u30fc\u306e\u6df1\u3055\u3001\u540c\u671f\u306e\u6319\u52d5\u3092\u53b3\u3057\u304f\u30c1\u30a7\u30c3\u30af\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u307e\u3055\u306b<\/strong>. EXT4 \u3068 XFS \u306f mq-deadline \u3067\u52b9\u7387\u7684\u306b\u52d5\u4f5c\u3057\u307e\u3059\u304c\u3001ZFS \u306f\u591a\u304f\u306e\u3053\u3068\u3092\u81ea\u8eab\u3067\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u304a\u3088\u3073\u96c6\u7d04\u3057\u307e\u3059\u3002ZFS \u3092\u642d\u8f09\u3057\u305f\u30db\u30b9\u30c8\u3067\u306f\u3001ZFS \u304c\u3059\u3067\u306b\u51fa\u529b\u3092\u5f62\u6210\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306e\u5f71\u97ff\u304c\u3057\u3070\u3057\u3070\u5c11\u306a\u3044\u3053\u3068\u3092\u89b3\u5bdf\u3057\u3066\u3044\u307e\u3059\u3002\u6bd4\u8f03\u306b\u306f\u3001\u540c\u4e00\u306e\u30de\u30a6\u30f3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u691c\u8a0e\u3059\u308b\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 <a href=\"https:\/\/webhosting.de\/ja\/ext4-xfs-zfs-%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%b3%e3%82%b9%e6%af%94%e8%bc%83-%e3%82%b9%e3%83%88%e3%83%ac%e3%83%bc%e3%82%b8\/\">EXT4\u3001XFS\u3001\u307e\u305f\u306f ZFS<\/a> \u6709\u76ca\u306a\u8996\u70b9 <strong>\u30b9\u30c8\u30ec\u30fc\u30b8<\/strong>-\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3002.<\/p>\n\n<h2>\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3001\u969c\u58c1\uff1a\u898b\u904e\u3054\u3055\u308c\u304c\u3061\u306a\u534a\u5206<\/h2>\n\n<p>\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306f\u3001\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u30b5\u30d6\u30b7\u30b9\u30c6\u30e0\u304c\u8a31\u5bb9\u3059\u308b\u7bc4\u56f2\u3067\u306e\u307f\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u79c1\u306f\u5e38\u306b\u4ee5\u4e0b\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n  <li><strong>dirty\u30d1\u30e9\u30e1\u30fc\u30bf<\/strong>: <code>sysctl vm.dirty_background_bytes<\/code>, <code>vm.dirty_bytes<\/code>, <code>vm.dirty_expire_centisecs<\/code> \u30ab\u30fc\u30cd\u30eb\u306e\u66f8\u304d\u8fbc\u307f\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3068\u7a4d\u6975\u6027\u3092\u5236\u5fa1\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5834\u5408\u3001P99 \u3092\u5b89\u5b9a\u3055\u305b\u308b\u305f\u3081\u306b\u30d0\u30fc\u30b9\u30c8\u306e\u30d4\u30fc\u30af\u3092\u4e0b\u3052\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002.<\/li>\n  <li><strong>\u969c\u58c1\/\u30d5\u30e9\u30c3\u30b7\u30e5<\/strong>: EXT4\u306a\u3069\u306e\u30aa\u30d7\u30b7\u30e7\u30f3 <code>\u969c\u58c1<\/code> \u307e\u305f\u306f XFS \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30d5\u30e9\u30c3\u30b7\u30e5\u306f\u3001\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\uff08BBWC \u306a\u3069\uff09\u304c\u305d\u308c\u3092\u5f15\u304d\u7d99\u3050\u5834\u5408\u306b\u306e\u307f\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3057\u307e\u3059\u3002\u300cnobarrier\u300d\u306f\u3001\u96fb\u529b\u4fdd\u8b77\u6a5f\u80fd\u304c\u306a\u3044\u305f\u3081 <strong>\u5371\u967a\u306a<\/strong>.<\/li>\n  <li><strong>\u30c7\u30d0\u30a4\u30b9\u66f8\u304d\u8fbc\u307f\u30ad\u30e3\u30c3\u30b7\u30e5<\/strong>: \u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u306e\u66f8\u304d\u8fbc\u307f\u30ad\u30e3\u30c3\u30b7\u30e5\u8a2d\u5b9a\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002 <code>fsync<\/code> \u5b9f\u969b\u306b\u30e1\u30c7\u30a3\u30a2\u306b\u4fdd\u5b58\u3055\u308c\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\u3055\u308c\u308b\u3060\u3051\u3067\u306f\u306a\u3044\u3002.<\/li>\n<\/ul>\n<p>Writeback \u3092\u5e73\u6ed1\u5316\u3059\u308b\u3068\u3001\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306e\u8ca0\u8377\u304c\u8efd\u6e1b\u3055\u308c\u307e\u3059\u3002\u30c7\u30c3\u30c9\u30e9\u30a4\u30f3\u306f\u78ba\u5b9f\u306b\u5b88\u3089\u308c\u3001BFQ \u306f\u7a81\u7136\u306e\u30d5\u30e9\u30c3\u30b7\u30e5\u306e\u6ce2\u306b\u5bfe\u51e6\u3059\u308b\u4f5c\u696d\u304c\u5c11\u306a\u304f\u3066\u6e08\u307f\u307e\u3059\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/12\/linux_io_scheduler_4813.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u4eee\u60f3\u5316\u3001\u30b3\u30f3\u30c6\u30ca\u3001\u30af\u30e9\u30a6\u30c9\uff1a\u5b9f\u969b\u306b\u8a08\u753b\u3057\u3066\u3044\u308b\u306e\u306f\u8ab0\uff1f<\/h2>\n\n<p>VM \u3067\u306f\u3001\u30cf\u30a4\u30d1\u30fc\u30d0\u30a4\u30b6\u30fc\u304c\u7269\u7406\u7684\u306a I\/O \u30d5\u30ed\u30fc\u3092\u5236\u5fa1\u3059\u308b\u305f\u3081\u3001\u30b2\u30b9\u30c8\u3067\u306f Noop\/none \u3092\u3088\u304f\u9078\u629e\u3057\u3066\u91cd\u8907\u3092\u56de\u907f\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u8ad6\u7406\u5b66<\/strong> \u907f\u3051\u308b\u3079\u304d\u3002\u30db\u30b9\u30c8\u81ea\u4f53\u3067\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u3084\u30bf\u30b9\u30af\u306b\u5fdc\u3058\u3066 mq-deadline \u307e\u305f\u306f BFQ \u3092\u4f7f\u3063\u3066\u308b\u3088\u3002\u30af\u30e9\u30a6\u30c9\u30dc\u30ea\u30e5\u30fc\u30e0\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d6\u30ed\u30c3\u30af\u30b9\u30c8\u30ec\u30fc\u30b8\u306a\u3069\uff09\u306e\u5834\u5408\u3001\u8a08\u753b\u306e\u4e00\u90e8\u306f\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306b\u3042\u308b\u304b\u3089\u3001\u4eee\u5b9a\u306b\u983c\u308b\u3088\u308a\u3082\u5b9f\u969b\u306e\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u6e2c\u3063\u3066\u308b\u3002\u8ca0\u8377\u304c\u5927\u304d\u304f\u6df7\u5728\u3059\u308b\u30b3\u30f3\u30c6\u30ca\u30db\u30b9\u30c8\u306e\u5834\u5408\u3001BFQ \u306e\u65b9\u304c\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u6027\u304c\u826f\u3044\u3053\u3068\u304c\u591a\u3044\u306d\u3002 \u30d5\u30e9\u30c3\u30b7\u30e5\u306e\u307f\u306e\u5747\u8cea\u306a\u30d0\u30c3\u30c1\u30af\u30e9\u30b9\u30bf\u3067\u306f\u3001\u3059\u3079\u3066\u306e CPU \u6642\u9593\u304c\u91cd\u8981\u3067\u3042\u308a\u3001\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u304c\u52b9\u7387\u7684\u3067\u3042\u308b\u305f\u3081\u3001Noop \u304c\u4e3b\u6d41\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002 <strong>\u4ed5\u4e8b<\/strong>.<\/p>\n\n<h2>RAID\u3001LVM\u3001MD\u3001\u30de\u30eb\u30c1\u30d1\u30b9\uff1a\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u304c\u6a5f\u80fd\u3059\u308b\u5834\u6240<\/h2>\n\n<p>\u7a4d\u307f\u91cd\u306d\u3089\u308c\u305f\u30d6\u30ed\u30c3\u30af\u30b9\u30bf\u30c3\u30af\u3067\u3001\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u3092 <strong>\u30c8\u30c3\u30d7\u30c7\u30d0\u30a4\u30b9<\/strong> \u95a2\u9023\u3059\u308b\u30ad\u30e5\u30fc\u304c\u305d\u3053\u306b\u3042\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n<ul>\n  <li><strong>LVM\/dm-crypt<\/strong>: \u30b9\u30b1\u30b8\u30e5\u30fc\u30e9 <code>\/dev\/dm-*<\/code> \u305d\u308c\u305e\u308c <code>\/dev\/mapper\/<\/code> \u8a2d\u5b9a\u3057\u307e\u3059\u3002\u7269\u7406\u7684\u306a PV \u306f\u3001\u307b\u3068\u3093\u3069\u306e\u5834\u5408 <code>\u306a\u3057<\/code>, \u30de\u30fc\u30b8\/\u30bd\u30fc\u30c8\u304c\u4e8c\u91cd\u306b\u884c\u308f\u308c\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u3067\u3059\u3002.<\/li>\n  <li><strong>MD-RAID<\/strong>: <code>\/dev\/mdX<\/code> \u6c7a\u5b9a\u3059\u308b\uff1b\u305d\u306e\u4e0b\u306b\u3042\u308b <code>sdX<\/code> \u30c7\u30d0\u30a4\u30b9\u306f\u9759\u304b\u306b\u52d5\u4f5c\u3057\u7d9a\u3051\u307e\u3059 <code>\u306a\u3057<\/code>. \u30cf\u30fc\u30c9\u30a6\u30a7\u30a2 RAID \u306f\u3001\u5358\u4e00\u306e\u30d6\u30ed\u30c3\u30af\u30c7\u30d0\u30a4\u30b9\u3068\u3057\u3066\u6271\u308f\u308c\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30de\u30eb\u30c1\u30d1\u30b9<\/strong>\u30de\u30eb\u30c1\u30d1\u30b9\u30de\u30c3\u30d1\u30fc (<code>\/dev\/mapper\/mpatha<\/code>) \u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u305d\u306e\u4e0b\u306e\u30d1\u30b9\u30c7\u30d0\u30a4\u30b9\u306f <code>\u306a\u3057<\/code>.<\/li>\n<\/ul>\n<p>\u91cd\u8981\uff1a\u79c1\u306f\u30c6\u30b9\u30c8\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5206\u3051\u307e\u3059\u3002 <strong>\u30d7\u30fc\u30eb<\/strong> \u304a\u3088\u3073\u5197\u9577\u6027\u30ec\u30d9\u30eb\uff08RAID1\/10 \u5bfe RAID5\/6\uff09\u3002\u30d1\u30ea\u30c6\u30a3 RAID \u306f\u30e9\u30f3\u30c0\u30e0\u66f8\u304d\u8fbc\u307f\u306b\u5bfe\u3057\u3066\u3088\u308a\u654f\u611f\u306b\u53cd\u5fdc\u3057\u307e\u3059\u3002\u3053\u306e\u70b9\u3067\u306f\u3001mq-deadline \u306f\u4e00\u8cab\u3057\u305f\u8aad\u307f\u53d6\u308a\u30c7\u30c3\u30c9\u30e9\u30a4\u30f3\u3068\u6574\u7136\u3068\u3057\u305f\u51fa\u529b\u306b\u3088\u3063\u3066\u3001\u591a\u304f\u306e\u5834\u5408\u512a\u4f4d\u306b\u7acb\u3063\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u6226\u7565\uff1a\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7<\/h2>\n\n<p>\u57fa\u672c\u6e2c\u5b9a\u304b\u3089\u59cb\u3081\u307e\u3059\uff1a\u73fe\u5728\u306e\u5fdc\u7b54\u6642\u9593\u3001\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u300195\/99\u30d1\u30fc\u30bb\u30f3\u30bf\u30a4\u30eb\u3001CPU<strong>\u8ca0\u8377<\/strong>. \u305d\u306e\u5f8c\u3001\u901a\u5e38\u306f\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u3068\u3044\u30461\u3064\u306e\u8981\u7d20\u306e\u307f\u3092\u5909\u66f4\u3057\u3001\u540c\u3058\u8ca0\u8377\u3092\u518d\u5ea6\u5b9f\u884c\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 <code>fio<\/code> \u5236\u5fa1\u3057\u3066\u652f\u63f4\u3057\u307e\u3059\u304c\u3001\u79c1\u306f\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30c6\u30b9\u30c8\u3067\u5404\u4eee\u8aac\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u306f\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3068 fsync \u52d5\u4f5c\u3092\u53cd\u6620\u3057\u305f\u72ec\u81ea\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u304c\u9069\u3057\u3066\u3044\u307e\u3059\u3002\u6e2c\u5b9a\u5024\u304c\u5b89\u5b9a\u3057\u3066\u304b\u3089\u521d\u3081\u3066\u3001\u9078\u629e\u5185\u5bb9\u3092\u78ba\u5b9a\u3057\u3001\u305d\u308c\u3092\u6587\u66f8\u5316\u3057\u307e\u3059\u3002 <strong>\u306a\u305c<\/strong>.<\/p>\n\n<h2>\u30ad\u30e5\u30fc\u306e\u6df1\u3055\u3001\u5148\u8aad\u307f\u3001CPU \u30a2\u30d5\u30a3\u30cb\u30c6\u30a3<\/h2>\n\n<p>\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306b\u52a0\u3048\u3066\u3001\u30ad\u30e5\u30fc\u30d1\u30e9\u30e1\u30fc\u30bf\u3082\u5b9f\u52d9\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002<\/p>\n<ul>\n  <li><strong>\u30ad\u30e5\u30fc\u306e\u6df1\u3055<\/strong>: <code>\/sys\/block\/\/queue\/nr_requests<\/code> \u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u30ad\u30e5\u30fc\u3054\u3068\u306e\u4fdd\u7559\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5236\u9650\u3057\u307e\u3059\u3002NVMe \u306f\u6df1\u3044\u30ad\u30e5\u30fc\uff08\u9ad8\u3044\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\uff09\u306b\u5bfe\u5fdc\u3057\u3001HDD \u306f\u9069\u5ea6\u306a\u6df1\u3055\u306e\u30ad\u30e5\u30fc\uff08\u3088\u308a\u5b89\u5b9a\u3057\u305f\u30ec\u30a4\u30c6\u30f3\u30b7\uff09\u3067\u30e1\u30ea\u30c3\u30c8\u3092\u767a\u63ee\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u5148\u8aad\u307f<\/strong>: <code>\/sys\/block\/\/queue\/read_ahead_kb<\/code> \u305d\u308c\u305e\u308c <code>blockdev --getra\/setra<\/code>. \u3002\u30b7\u30fc\u30b1\u30f3\u30b7\u30e3\u30eb\u306a\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306e\u5834\u5408\u306f\u5c11\u3057\u9ad8\u304f\u3001\u30e9\u30f3\u30c0\u30e0\u306a\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306e\u5834\u5408\u306f\u4f4e\u304f\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/li>\n  <li><strong>rq_affinity<\/strong>\u3068 <code>\/sys\/block\/\/queue\/rq_affinity<\/code> 2 \u3067\u306f\u3001I\/O \u5b8c\u4e86\u304c\u512a\u5148\u7684\u306b\u751f\u6210\u5143\u306e CPU \u30b3\u30a2\u3067\u51e6\u7406\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30af\u30ed\u30b9 CPU \u30b3\u30b9\u30c8\u304c\u524a\u6e1b\u3055\u308c\u307e\u3059\u3002.<\/li>\n  <li><strong>\u56de\u8ee2<\/strong>: SSD\u304c\u52d5\u4f5c\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002 <code>\u56de\u8ee2=0<\/code> \u30ab\u30fc\u30cd\u30eb\u304c HDD \u30d2\u30e5\u30fc\u30ea\u30b9\u30c6\u30a3\u30c3\u30af\u3092\u9069\u7528\u3057\u306a\u3044\u3088\u3046\u306b\u5831\u544a\u3059\u308b\u3002.<\/li>\n  <li><strong>\u30de\u30fc\u30b8<\/strong>: <code>\/sys\/block\/\/queue\/nomerges<\/code> \u30de\u30fc\u30b8\u3092\u524a\u6e1b\u3067\u304d\u307e\u3059\uff082=\u30aa\u30d5\uff09\u3002NVMe\u306e\u30de\u30a4\u30af\u30ed\u30ec\u30a4\u30c6\u30f3\u30b7\u306b\u306f\u6709\u52b9\u3067\u3059\u304c\u3001HDD\u3067\u306f\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u3001\u4e0d\u5229\u306b\u306a\u308a\u307e\u3059\u3002.<\/li>\n  <li><strong>io_poll<\/strong> (NVMe): \u30dd\u30fc\u30ea\u30f3\u30b0\u306f\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u4f4e\u6e1b\u3067\u304d\u307e\u3059\u304c\u3001CPU \u3092\u5fc5\u8981\u3068\u3057\u307e\u3059\u3002\u79c1\u306f\u3001\u7279\u5b9a\u306e\u72b6\u6cc1\u3067\u3053\u308c\u3092\u6709\u52b9\u306b\u3057\u307e\u3059\u3002 <strong>\u4f4e\u9045\u5ef6<\/strong>-\u5fc5\u8981\u6761\u4ef6<\/li>\n<\/ul>\n\n<h2>\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u30fb\u30c1\u30e5\u30fc\u30ca\u30d6\u30eb\u306e\u8a73\u7d30<\/h2>\n\n<p>\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306b\u5fdc\u3058\u3066\u3001\u9069\u5207\u306a\u5fae\u8abf\u6574\u304c\u53ef\u80fd\u3067\u3042\u308b\u3002<\/p>\n<ul>\n  <li><strong>mq-\u30c7\u30c3\u30c9\u30e9\u30a4\u30f3<\/strong>: <code>\/sys\/block\/\/queue\/iosched\/read_expire<\/code> (ms\u3001\u901a\u5e38\u306f\u5c0f\u3055\u3044), <code>write_expire<\/code> \uff08\u5927\u304d\u3044\uff09, <code>fifo_batch<\/code> (\u30d0\u30c3\u30c1\u30b5\u30a4\u30ba), <code>front_merges<\/code> (0\/1)\u3002\u79c1\u306f <code>read_expire<\/code> P95\u30ea\u30fc\u30c9\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306b\u77ed\u7e2e\u3057\u3001\u8abf\u6574\u3059\u308b <code>fifo_batch<\/code> \u30c7\u30d0\u30a4\u30b9\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002.<\/li>\n  <li><strong>BFQ<\/strong>: <code>slice_idle<\/code> \uff08\u30b7\u30fc\u30b1\u30f3\u30b9\u4f7f\u7528\u306e\u305f\u3081\u306e\u30a2\u30a4\u30c9\u30eb\u6642\u9593\uff09, <code>\u4f4e\u9045\u5ef6<\/code> (0\/1) \u53cd\u5fdc\u306e\u826f\u3044\u53cc\u65b9\u5411\u6027\u3002 <code>bfq.weight<\/code> Cgroups \u3067\u306f\u3001\u76f8\u5bfe\u7684\u306a\u5272\u5408\u3092\u975e\u5e38\u306b\u7d30\u304b\u304f\u5236\u5fa1\u3057\u3066\u3044\u307e\u3059\u3002.<\/li>\n  <li><strong>none\/noop<\/strong>: \u8abf\u6574\u30cd\u30b8\u306f\u307b\u3068\u3093\u3069\u3042\u308a\u307e\u305b\u3093\u304c\u3001 <strong>\u5468\u8fba\u74b0\u5883<\/strong> \uff08\u30ad\u30e5\u30fc\u306e\u6df1\u3055\u3001\u30ea\u30fc\u30c9\u30a2\u30d8\u30c3\u30c9\uff09\u304c\u7d50\u679c\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002.<\/li>\n<\/ul>\n<p>\u79c1\u306f\u5e38\u306b1\u3064\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u307f\u3092\u5909\u66f4\u3057\u3001\u305d\u306e\u5909\u66f4\u3092\u53b3\u5bc6\u306b\u8a18\u9332\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u3069\u306e\u5909\u66f4\u304c\u3069\u306e\u3088\u3046\u306a\u52b9\u679c\u3092\u3082\u305f\u3089\u3057\u305f\u304b\u304c\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002.<\/p>\n\n<h2>\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\u3068\u305d\u308c\u3092\u56de\u907f\u3059\u308b\u65b9\u6cd5<\/h2>\n\n<p>RAID \u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u306e\u5f8c\u308d\u306b\u3042\u308b HDD \u3068 SSD \u306e\u6df7\u5408\u30d7\u30fc\u30eb\u306f\u30c6\u30b9\u30c8\u7d50\u679c\u3092\u6b6a\u3081\u308b\u305f\u3081\u3001\u6e2c\u5b9a\u306f\u500b\u5225\u306b\u884c\u3044\u307e\u3059\u3002 <strong>\u30b0\u30eb\u30fc\u30d7<\/strong>. \u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u306f\u30d6\u30ed\u30c3\u30af\u30c7\u30d0\u30a4\u30b9\u3054\u3068\u306b\u9069\u7528\u3055\u308c\u308b\u3068\u3044\u3046\u3053\u3068\u3092\u5fd8\u308c\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002LVM\u30de\u30c3\u30d1\u30fc\u3068MD\u30c7\u30d0\u30a4\u30b9\u306f\u5225\u3005\u306b\u6271\u3044\u307e\u3059\u3002\u6c38\u7d9a\u6027\u306f\u5931\u308f\u308c\u3084\u3059\u3044\u3082\u306e\u3067\u3059\u3002udev\u30eb\u30fc\u30eb\u3084\u30ab\u30fc\u30cd\u30eb\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u306a\u3044\u5834\u5408\u3001\u518d\u8d77\u52d5\u5f8c\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u306b\u623b\u308a\u307e\u3059\u3002Cgroups\u3084I\/O\u512a\u5148\u5ea6\u306f\u3001\u516c\u5e73\u6027\u3092\u5927\u5e45\u306b\u9ad8\u3081\u308b\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u591a\u304f\u306e\u5834\u5408\u5229\u7528\u3055\u308c\u307e\u305b\u3093\u3002 \u307e\u305f\u3001\u9078\u629e\u3057\u305f\u30ed\u30b8\u30c3\u30af\u304c\u6f5c\u5728\u80fd\u529b\u3092\u6700\u5927\u9650\u306b\u767a\u63ee\u3067\u304d\u308b\u3088\u3046\u3001\u30ad\u30e5\u30fc\u306e\u6df1\u3055\u3001\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u5e38\u306b\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u30b7\u30e7\u30fc<\/strong>.<\/p>\n\n<h2>\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\uff1a\u75c7\u72b6\u3092\u7684\u78ba\u306b\u8aad\u307f\u53d6\u308b<\/h2>\n\n<p>\u6e2c\u5b9a\u5024\u304c\u5909\u5316\u3057\u305f\u5834\u5408\u3001\u79c1\u306f\u30d1\u30bf\u30fc\u30f3\u3092\u89e3\u91c8\u3057\u3001\u5177\u4f53\u7684\u306a\u5bfe\u7b56\u3092\u5c0e\u304d\u51fa\u3057\u307e\u3059\u3002<\/p>\n<ul>\n  <li><strong>\u591a\u304f\u306e\u30ea\u30fc\u30c9\u3067\u9ad8\u3044 P99 \u30ec\u30a4\u30c6\u30f3\u30b7<\/strong>\u66f8\u304d\u8fbc\u307f\u304c\u8aad\u307f\u53d6\u308a\u3092\u5727\u8feb\u3057\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d\u3059\u308b\u3002mq-deadline \u3067\u30c6\u30b9\u30c8\u3059\u308b\u3002, <code>read_expire<\/code> \u4f4e\u4e0b\u3001\u30e9\u30a4\u30c8\u30d0\u30c3\u30af\u306e\u5e73\u6ed1\u5316 (<code>vm.dirty_*<\/code> \u8abf\u6574\u3059\u308b\uff09\u3002.<\/li>\n  <li><strong>100% HDD\u4e0a\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u3001\u4f4e\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8<\/strong>: \u30b7\u30fc\u30af\u3092\u652f\u914d\u3059\u308b\u3002BFQ \u307e\u305f\u306f mq-deadline \u3092\u8a66\u3059\u3001\u30ea\u30fc\u30c9\u30a2\u30d8\u30c3\u30c9\u3092\u524a\u6e1b\u3059\u308b\u3001\u30ad\u30e5\u30fc\u306e\u6df1\u3055\u3092\u9069\u5ea6\u306b\u4fdd\u3064\u3002.<\/li>\n  <li><strong>\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u306f\u826f\u597d\u3060\u304c\u3001UI\u304c\u304e\u3053\u3061\u306a\u3044<\/strong>\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u6027\u304c\u640d\u306a\u308f\u308c\u307e\u3059\u3002BFQ\u3092\u6709\u52b9\u306b\u3057\u3001\u91cd\u8981\u306a\u30b5\u30fc\u30d3\u30b9\u3092 <code>ionice -c1<\/code> \u307e\u305f\u306f Cgroup \u306e\u91cd\u307f\u4ed8\u3051\u3092\u512a\u5148\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u6642\u9593\u5e2f\u306b\u3088\u3063\u3066\u5927\u304d\u306a\u5909\u52d5\u304c\u3042\u308b<\/strong>: \u5171\u6709\u30ea\u30bd\u30fc\u30b9\u3002Cgroups \u3067\u5206\u96e2\u3057\u3001\u30d7\u30fc\u30eb\u3054\u3068\u306b\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u3092\u9078\u629e\u3057\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u30aa\u30d5\u30d4\u30fc\u30af\u6642\u306b\u79fb\u884c\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>dmesg \u306b\u304a\u3051\u308b NVMe \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8<\/strong>\uff1a\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u307e\u305f\u306f\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u306e\u554f\u984c\u3002. <code>io_poll<\/code> \u30c6\u30b9\u30c8\u7684\u306b\u7121\u52b9\u306b\u3057\u3001\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\/\u30c9\u30e9\u30a4\u30d0\u3092\u78ba\u8a8d\u3057\u3001\u30d1\u30b9\u5197\u9577\u6027\uff08\u30de\u30eb\u30c1\u30d1\u30b9\uff09\u3092\u691c\u8a3c\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/li>\n<\/ul>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/12\/linux-io-hosting-9481.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u7c21\u5358\u306b\u307e\u3068\u3081\u308b\u3068\uff1a\u65e5\u5e38\u7684\u306a\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u696d\u52d9\u306b\u304a\u3051\u308b\u660e\u78ba\u306a\u6c7a\u5b9a<\/h2>\n\n<p>\u30d5\u30e9\u30c3\u30b7\u30e5\u30b9\u30c8\u30ec\u30fc\u30b8\u3068\u30b2\u30b9\u30c8\u306b\u3064\u3044\u3066\u306f\u3001\u79c1\u306f\u3088\u304f\u4ee5\u4e0b\u3092\u9078\u629e\u3057\u307e\u3059\u3002 <strong>Noop<\/strong>, \u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u7bc0\u7d04\u3057\u3001\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u3092\u52d5\u4f5c\u3055\u305b\u308b\u305f\u3081\u3067\u3059\u3002HDD \u307e\u305f\u306f RAID \u3092\u642d\u8f09\u3057\u305f\u30aa\u30fc\u30eb\u30e9\u30a6\u30f3\u30c9\u30b5\u30fc\u30d0\u30fc\u3067\u306f\u3001mq-deadline 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