{"id":33233,"date":"2026-06-27T19:38:00","date_gmt":"2026-06-27T17:38:00","guid":{"rendered":"https:\/\/www.chinasmartbuy.com\/blog\/?p=33233"},"modified":"2026-06-27T18:19:06","modified_gmt":"2026-06-27T16:19:06","slug":"linux-patch-raid5-prestazioni","status":"publish","type":"post","link":"https:\/\/www.chinasmartbuy.com\/blog\/linux-patch-raid5-prestazioni\/","title":{"rendered":"Linux RAID5,8 patch migliorano le prestazioni fino al 17,4%"},"content":{"rendered":"\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=Bebas+Neue&amp;family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&amp;display=swap\" rel=\"stylesheet\">\n<style>\n  :root {\n    --red: #CC1B1B;\n    --red-light: rgba(204,27,27,0.08);\n    --red-mid: #e84040;\n    --accent-soft-bg: rgba(204,27,27,0.07);\n    --accent-soft-border: rgba(204,27,27,0.18);\n    --text: #1a1a1a;\n    --text-muted: #666;\n    --card: #ffffff;\n    --border: #ebebeb;\n    --page-bg: #ffffff;\n    --surface-soft: #fafafa;\n    --surface-contrast: #f0f0f0;\n    --line-soft: #f5f5f5;\n    --soft-label: #bbb;\n    --muted-label: #999;\n    --copy: #333;\n    --font-head: 'Bebas Neue', sans-serif;\n    --font-body: 'DM Sans', sans-serif;\n    --heading-spacing: 0.04em;\n    --heading-weight: 400;\n    --spec-header-spacing: 0.08em;\n    --quickfacts-shadow: 0 10px 24px rgba(15,23,42,0.06);\n  }\n  .fbp5-wrap,.fbp5-wrap * { box-sizing:border-box; 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}\n    .rh-downloadbox-head { flex-direction:column; }\n    .rh-downloadbox-link { width:100%; }\n    .rh-offerbox-head { flex-direction:column; }\n    .rh-offerbox-links { grid-template-columns:1fr; }\n    .rh-offer-inline-wrap { flex-direction:column; align-items:flex-start; }\n    .rh-offer-inline-cta { width:100%; }\n  }\n<\/style>\n<div class=\"fbp5-wrap rh-json-article\" id=\"rh-article-mqwkehxh-h03v2\" data-rh-article-type=\"news\" data-rh-site-profile=\"china-smart-buy\">\n  <div class=\"fbp5-intro\">\n    \n    <p>Per gli amministratori che gestiscono array RAID5 grandi e molto caricati, nel kernel Linux arriva una serie di <strong>8 patch<\/strong> che punta a ridurre la contesa sulle risorse e a rendere pi\u00f9 efficiente l\u2019accesso alla memoria. Nei test pubblicati dallo sviluppatore, il guadagno complessivo arriva fino a <strong>17,4%<\/strong> in uno scenario specifico.<\/p><p>L\u2019ottimizzazione riguarda il software RAID MD e si concentra soprattutto sulle configurazioni con pi\u00f9 core, pi\u00f9 dischi e pi\u00f9 thread di lavoro attivi. Il risultato \u00e8 interessante perch\u00e9 interviene su un collo di bottiglia tipico dei sistemi di storage ad alta intensit\u00e0, dove la scalabilit\u00e0 conta pi\u00f9 della singola prestazione del disco.<\/p>\n  <\/div><figure class=\"wp-block-image size-large\" style=\"margin:18px 0;display:block;clear:both;width:100%;position:relative;z-index:1\"><a href=\"https:\/\/www.chinasmartbuy.com\/blog\/wp-content\/uploads\/2026\/06\/linux-raid5-8-patch-migliorano-le-prestazioni-fino-al-17-4-287c6a0a-7431-4a24-bf0c-0fbf-1a23qrk1.webp\" target=\"_blank\" rel=\"noopener\" style=\"display:block;width:100%;position:relative;z-index:2;pointer-events:auto;cursor:zoom-in\"><img decoding=\"async\" src=\"https:\/\/www.chinasmartbuy.com\/blog\/wp-content\/uploads\/2026\/06\/linux-raid5-8-patch-migliorano-le-prestazioni-fino-al-17-4-287c6a0a-7431-4a24-bf0c-0fbf-1a23qrk1.webp\" alt=\"Linux \u5185\u6838\u65b0\u8865\u4e01\u53ef\u63d0\u5347\u5927\u578b RAID5 \u9635\u5217\u6027\u80fd\uff0c\u6700\u9ad8\u589e\u76ca 17%\" loading=\"lazy\" style=\"display:block;max-width:100%;height:auto;margin:0 auto;pointer-events:auto\"><\/a><\/figure>\n  \n\n      <section class=\"fbp5-section\">\n        <div class=\"fbp5-section-label\">Aggiornamento kernel<\/div>\n        <h2>Linux, 8 patch per migliorare le prestazioni dei <span>grandi array RAID5<\/span><\/h2>\n        <p>Le modifiche sono state inviate da Hiroshi Nishida e mirano a migliorare la scalabilit\u00e0 del RAID5 software su array di grandi dimensioni, con molti core e molti dischi. L\u2019obiettivo \u00e8 intervenire sulla gestione delle stripe e della stripe cache, due aree dove la contesa tra thread pu\u00f2 diventare un freno evidente.<\/p><p>Il punto centrale \u00e8 semplice: quando aumenta il numero di core e di unit\u00e0 coinvolte, cresce anche la pressione sulle strutture condivise del RAID. Le patch cercano di alleggerire questo carico, in particolare quando sono attivi pi\u00f9 thread di elaborazione del RAID5.<\/p>\n        <ul class=\"fbp5-bullet-list\"><li>Pacchetto composto da <strong>8 patch<\/strong> per il sottosistema MD RAID5.<\/li><li>Focus su <strong>scalabilit\u00e0<\/strong> e percorso di <strong>rebuild<\/strong> dell\u2019array.<\/li><li>Ottimizzazione della contesa su stripe e stripe cache.<\/li><li>Beneficio pi\u00f9 evidente con `group_thread_cnt &gt; 0`.<\/li><\/ul>\n        <div class=\"rh-quickfacts-grid\">\n      <div class=\"rh-quickfacts-card\">\n        <div class=\"rh-quickfacts-label\">Ambito<\/div>\n        <div class=\"rh-quickfacts-value\">MD RAID5 software nel kernel Linux<\/div>\n      <\/div>\n    \n      <div class=\"rh-quickfacts-card\">\n        <div class=\"rh-quickfacts-label\">Obiettivo tecnico<\/div>\n        <div class=\"rh-quickfacts-value\">Ridurre la contesa e migliorare l\u2019accesso alla memoria<\/div>\n      <\/div>\n    \n      <div class=\"rh-quickfacts-card\">\n        <div class=\"rh-quickfacts-label\">Stato<\/div>\n        <div class=\"rh-quickfacts-value\">Patch in attesa di revisione da parte dei manutentori<\/div>\n      <\/div>\n    <\/div>\n        <div class=\"fbp5-highlight\">Le patch sono considerate a basso rischio e puntano a un problema molto concreto: quando il RAID5 cresce, la contesa interna pu\u00f2 pesare quanto, o pi\u00f9, della velocit\u00e0 dei singoli dischi.<\/div>\n        <div class=\"fbp5-info\">Il lavoro \u00e8 ancora in fase di revisione e i numeri pubblicati arrivano da test di laboratorio, quindi descrivono soprattutto il potenziale dell\u2019ottimizzazione in un contesto controllato.<\/div>\n        \n      <div class=\"fbp5-scheda\">\n        <div class=\"fbp5-scheda-header\">Dettagli tecnici principali<\/div>\n        \n          <div class=\"fbp5-scheda-row\">\n            <div class=\"fbp5-scheda-key\">Numero di patch<\/div>\n            <div class=\"fbp5-scheda-val\">8<\/div>\n          <\/div>\n        \n          <div class=\"fbp5-scheda-row\">\n            <div class=\"fbp5-scheda-key\">Scenario di interesse<\/div>\n            <div class=\"fbp5-scheda-val\">Array grandi, multicore, multidisco<\/div>\n          <\/div>\n        \n          <div class=\"fbp5-scheda-row\">\n            <div class=\"fbp5-scheda-key\">Area di intervento<\/div>\n            <div class=\"fbp5-scheda-val\">Stripe, stripe cache, thread di lavoro RAID5<\/div>\n          <\/div>\n        \n          <div class=\"fbp5-scheda-row\">\n            <div class=\"fbp5-scheda-key\">Rischio dichiarato<\/div>\n            <div class=\"fbp5-scheda-val\">Basso<\/div>\n          <\/div>\n        \n      <\/div>\n    \n      <\/section>\n    \n\n      <section class=\"fbp5-section\">\n        <div class=\"fbp5-section-label\">Test e risultati<\/div>\n        <h2>Nei test su 22 core e 6 ramdisk il guadagno arriva <span>fino al 17,4%<\/span><\/h2>\n        <p>La prova \u00e8 stata eseguita su una macchina con <strong>22 core<\/strong> usando <strong>6 ramdisk<\/strong> per simulare un array RAID 6 con schema <strong>4+2<\/strong>. Variando il numero di thread di lavoro, misurato come `group_thread_cnt` o `gtc`, \u00e8 stato possibile confrontare le prestazioni prima e dopo le patch.<\/p><p>Il risultato migliore si \u00e8 visto con <strong>gtc=4<\/strong>, configurazione in cui il miglioramento complessivo \u00e8 stato il pi\u00f9 evidente. Nei carichi misti i test hanno mostrato incrementi superiori al 10%, con picchi che arrivano a <strong>17,4%<\/strong>.<\/p>\n        <ul class=\"fbp5-bullet-list\"><li>Test condotto su una macchina con <strong>22 core<\/strong>.<\/li><li>Array simulato con <strong>6 ramdisk<\/strong> in configurazione RAID 6 <strong>4+2<\/strong>.<\/li><li>Con `gtc=4` il miglioramento \u00e8 stato il pi\u00f9 alto.<\/li><li>Nel test 4K random write l\u2019incremento ha toccato <strong>17,4%<\/strong>.<\/li><li>Nel carico database 8K con <strong>75% lettura<\/strong> il guadagno \u00e8 stato <strong>10,3%<\/strong>.<\/li><li>Nel carico OLTP 16K con <strong>70% lettura<\/strong> il guadagno \u00e8 stato <strong>10,1%<\/strong>.<\/li><\/ul>\n        <div class=\"rh-quickfacts-grid\">\n      <div class=\"rh-quickfacts-card\">\n        <div class=\"rh-quickfacts-label\">Miglior risultato<\/div>\n        <div class=\"rh-quickfacts-value\">17,4% nel test 4K random write<\/div>\n      <\/div>\n    <\/div>\n        <div class=\"fbp5-highlight\">Il dato pi\u00f9 forte \u00e8 il guadagno nei carichi misti: sono proprio quelli che somigliano di pi\u00f9 agli ambienti reali di storage e database, dove il RAID deve reggere letture e scritture insieme.<\/div>\n        <div class=\"fbp5-info\">I benchmark sono stati eseguiti su ramdisk, quindi senza la latenza fisica dei dischi reali. Su storage tradizionale il vantaggio lato CPU pu\u00f2 restare visibile, ma essere in parte assorbito dal ritardo dell\u2019hardware.<\/div>\n        \n      <div class=\"fbp5-scheda\">\n        <div class=\"fbp5-scheda-header\">Risultati pubblicati<\/div>\n        \n          <div class=\"fbp5-scheda-row\">\n            <div class=\"fbp5-scheda-key\">4K random write<\/div>\n            <div class=\"fbp5-scheda-val\">17,4%<\/div>\n          <\/div>\n        \n          <div class=\"fbp5-scheda-row\">\n            <div class=\"fbp5-scheda-key\">Database 8K, 75% lettura<\/div>\n            <div class=\"fbp5-scheda-val\">10,3%<\/div>\n          <\/div>\n        \n          <div class=\"fbp5-scheda-row\">\n            <div class=\"fbp5-scheda-key\">OLTP 16K, 70% lettura<\/div>\n            <div class=\"fbp5-scheda-val\">10,1%<\/div>\n          <\/div>\n        \n          <div class=\"fbp5-scheda-row\">\n            <div class=\"fbp5-scheda-key\">Intervallo complessivo osservato<\/div>\n            <div class=\"fbp5-scheda-val\">10% &#8211; 17%<\/div>\n          <\/div>\n        \n      <\/div>\n    \n      <\/section>\n    \n<\/div><div class=\"rh-attribution-pills\" style=\"display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-start;margin:16px 0 0\"><a href=\"https:\/\/www.ithome.com\/0\/969\/475.htm\" target=\"_blank\" rel=\"noopener\" title=\"Via: VIA\" aria-label=\"Via: VIA\" style=\"display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:16px;background:linear-gradient(135deg,#fff7ed,#ffedd5);color:#c2410c;text-decoration:none;font-size:11px;font-weight:900;letter-spacing:.08em;text-transform:uppercase;border:1px solid rgba(249,115,22,.20);box-shadow:0 8px 22px rgba(249,115,22,.08)\">Via<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>8 patch per il kernel Linux puntano a migliorare i grandi array RAID5 software. Nei test il guadagno arriva fino al 17,4%.<\/p>\n","protected":false},"author":10,"featured_media":33232,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_yoast_wpseo_focuskw_text_input":"patch Linux RAID5 prestazioni","footnotes":""},"categories":[480],"tags":[],"class_list":["post-33233","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Linux RAID5,8 patch migliorano le prestazioni fino al 17,4%<\/title>\n<meta name=\"description\" content=\"8 patch per Linux puntano a migliorare i grandi array RAID5 software, con test fino a +17,4% su carichi misti e database.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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