{"id":113018,"date":"2024-01-20T23:28:04","date_gmt":"2024-01-20T21:28:06","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/opyt-sozdaniya-hranilishha-ceph-c-propusknoj-sposobnostyu-tebibajt-v-sekundu"},"modified":"2024-01-20T23:28:04","modified_gmt":"2024-01-20T21:28:06","slug":"opyt-sozdaniya-hranilishha-ceph-c-propusknoj-sposobnostyu-tebibajt-v-sekundu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/opyt-sozdaniya-hranilishha-ceph-c-propusknoj-sposobnostyu-tebibajt-v-sekundu","title":{"rendered":"Erfahrung in der Erstellung eines Ceph-Speichers mit einer Bandbreite von mehreren Terabyte pro Sekunde","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ein Ingenieur von Clyso fasste die Erfahrung in der Erstellung eines Speicherclusters auf Basis des fehlertoleranten verteilten Systems Ceph zusammen, dessen Bandbreite mehr als ein Terabyte pro Sekunde betr\u00e4gt. Es wird vermerkt, dass dies der erste Ceph-Cluster ist, der einen solchen Wert erreicht hat, jedoch mussten die Ingenieure vor dem Erreichen des pr\u00e4sentierten Ergebnisses eine Reihe von weniger offensichtlichen Herausforderungen \u00fcberwinden. <\/p>\n

Um die Leistung um 10-20 % zu steigern, gen\u00fcgte es, auf den Servern im BIOS-Energiesparmodus nur den Maximalleistungsmodus zu aktivieren und den c-state zu deaktivieren (c-state \u00e4ndert die Energieeinstellungen je nach Last, was sich auf Ceph auswirkt). Au\u00dferdem stellte sich heraus, dass der Linux-Kernel bei der Verwendung von NVMe-Laufwerken erheblich Zeit mit der Verarbeitung von Spinlocks beim Aktualisieren der IOMMU-Mapping verbringt. Das Deaktivieren von IOMMU im Kernel f\u00fchrte zu einem signifikanten Anstieg der Leistung in Tests f\u00fcr das Lesen und Schreiben von Bl\u00f6cken mit einer Gr\u00f6\u00dfe von 4 MB. <\/p>\n

\u041f\u0440\u0438 \u044d\u0442\u043e\u043c \u043e\u0442\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 IOMMU \u043d\u0435 \u0440\u0435\u0448\u0438\u043b\u043e \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 \u0441 \u043f\u0440\u043e\u0441\u0435\u0434\u0430\u043d\u0438\u0435\u043c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u043f\u0440\u0438 \u0441\u043b\u0443\u0447\u0430\u0439\u043d\u043e\u0439 \u0437\u0430\u043f\u0438\u0441\u0438 \u0431\u043b\u043e\u043a\u043e\u0432, \u0440\u0430\u0437\u043c\u0435\u0440\u043e\u043c 4KB. \u0420\u0430\u0437\u0431\u0438\u0440\u0430\u044f\u0441\u044c \u0432 \u0447\u0451\u043c \u0434\u0435\u043b\u043e, \u0438\u043d\u0436\u0435\u043d\u0435\u0440\u044b \u043d\u0430\u0442\u043e\u043b\u043a\u043d\u0443\u043b\u0438\u0441\u044c \u043d\u0430 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0432 \u0441\u0431\u043e\u0440\u043e\u0447\u043d\u044b\u0445 \u0441\u0446\u0435\u043d\u0430\u0440\u0438\u044f\u0445 Ceph \u043e\u0442 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432 Gentoo \u0438 Ubuntu, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0432\u043a\u043b\u044e\u0447\u0430\u043b\u0438 \u0441\u0431\u043e\u0440\u043a\u0443 \u0441 \u043e\u043f\u0446\u0438\u0435\u0439 RelWithDebInfo, \u0442\u0430\u043a \u043a\u0430\u043a \u0441 \u043d\u0435\u0439 \u0432 GCC \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u043b\u0441\u044f \u0440\u0435\u0436\u0438\u043c \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0438 «-O2», \u043f\u0440\u0438 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0437\u0430\u043c\u0435\u0442\u043d\u043e \u0432\u043e\u0437\u0440\u0430\u0441\u0442\u0430\u043b\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c Ceph. \u041a \u0441\u043d\u0438\u0436\u0435\u043d\u0438\u044e \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0442\u0430\u043a\u0436\u0435 \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u043b\u0430 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u044f \u0441 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u043e\u0439 TCMalloc. \u0418\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u0444\u043b\u0430\u0433\u043e\u0432 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438 \u0438 \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f TCMalloc \u043f\u0440\u0438\u0432\u0435\u043b\u043e \u043a \u0441\u043d\u0438\u0436\u0435\u043d\u0438\u044e \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u0443\u043f\u0430\u043a\u043e\u0432\u043a\u0438 (compaction) \u0432 \u0442\u0440\u0438 \u0440\u0430\u0437\u0430 \u0438 \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u044e \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0441\u043b\u0443\u0447\u0430\u0439\u043d\u044b\u0445 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 \u0437\u0430\u043f\u0438\u0441\u0438 \u0431\u043b\u043e\u043a\u0430\u043c\u0438 4K \u0432 \u0434\u0432\u0430 \u0440\u0430\u0437\u0430. \u0412 \u0444\u0438\u043d\u0430\u043b\u0435 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0431\u044b\u043b\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u0435\u0434\u0435\u043d\u0430 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u044f \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043a Reef RocksDB \u0438 \u0433\u0440\u0443\u043f\u043f \u0440\u0430\u0437\u043c\u0435\u0449\u0435\u043d\u0438\u044f (PG). <\/p>\n

Der Cluster besteht aus 68 Knoten auf Basis von Server<\/a> Dell PowerEdge R6615 mit CPU AMD EPYC 9454P 48C\/96T. Jeder Knoten ist mit 10 NVMe-Speicherl\u00f6sungen Dell 15,36 TB, zwei 100GbE Ethernet-Adaptern Mellanox ConnectX-6 und 192 GB RAM ausgestattet. Die Software basiert auf Ubuntu 20.04.6 und Ceph 17.2.7. Im Cluster mit 63 Knoten sind 630 OSD (Object Storage Daemon, ein Hintergrundprozess, der die Datenspeicherung im lokalen Speicher verwaltet, wobei ein OSD auf jedem NVMe-Speicher vorhanden ist), drei MON-Prozesse (Monitor, \u00fcberwacht den Zustand des Clusters) und ein MGR-Prozess (Manager, verwaltet den Service) aktiv. Die Speicherkapazit\u00e4t betr\u00e4gt 8,2 PB. <\/p>\n

\u041f\u0440\u043e\u043f\u0443\u0441\u043a\u043d\u0430\u044f \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438 \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f\u0445 \u0447\u0442\u0435\u043d\u0438\u044f \u0431\u043b\u043e\u043a\u043e\u0432 4\u041c \u0441\u043e\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \t1025 GiB\/s, \u0437\u0430\u043f\u0438\u0441\u0438 — 270 GiB\/s. \u041f\u0440\u0438 \u0441\u043b\u0443\u0447\u0430\u0439\u043d\u043e\u043c \u0447\u0442\u0435\u043d\u0438\u0438 \u0431\u043b\u043e\u043a\u043e\u0432 4KB \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u0441\u043e\u0441\u0442\u0430\u0432\u0438\u043b\u0430 25.5 \u043c\u0438\u043b\u043b\u0438\u043e\u043d\u043e\u0432 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 \u0447\u0442\u0435\u043d\u0438\u044f \u0432 \u0441\u0435\u043a\u0443\u043d\u0434\u0443 \u0438 4.9 \u043c\u043b\u043d \u043f\u0440\u0438 \u0437\u0430\u043f\u0438\u0441\u0438. \u0412\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0443\u043c\u0435\u043d\u044c\u0448\u0438\u043b\u043e \u043f\u0440\u043e\u043f\u0443\u0441\u043a\u043d\u0443\u044e \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438 \u0447\u0442\u0435\u043d\u0438\u0438 \u043f\u0440\u0438\u043c\u0435\u0440\u043d\u043e \u0434\u043e 750 GiB\/s. \u041f\u0440\u0438 \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u043d\u0438\u0438 \u043a\u043e\u0434\u043e\u0432 \u043a\u043e\u0440\u0440\u0435\u043a\u0446\u0438\u0438 \u043e\u0448\u0438\u0431\u043e\u043a EC62 \u043f\u0440\u043e\u043f\u0443\u0441\u043a\u043d\u0430\u044f \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u044c \u0441\u043e\u0441\u0442\u0430\u0432\u0438\u043b\u0430 547 GiB\/s \u043f\u0440\u0438 \u0447\u0442\u0435\u043d\u0438\u0438 \u0438 387 GiB\/s \u043f\u0440\u0438 \u0437\u0430\u043f\u0438\u0441\u0438 (\u0441\u043a\u043e\u0440\u043e\u0441\u0442\u044c \u0437\u0430\u043f\u0438\u0441\u0438 \u043e\u043a\u0430\u0437\u0430\u043b\u0430\u0441\u044c \u0432\u044b\u0448\u0435 \u0447\u0435\u043c \u0431\u0435\u0437 \u043a\u043e\u0434\u043e\u0432 \u043a\u043e\u0440\u0440\u0435\u043a\u0446\u0438\u0438), \u0430 \u043f\u0440\u0438 \u0441\u043b\u0443\u0447\u0430\u0439\u043d\u043e\u043c \u0434\u043e\u0441\u0442\u0443\u043f\u0435 \t3.4M IOPS \u043f\u0440\u0438 \u0447\u0442\u0435\u043d\u0438\u0438 \u0438 936K IOPS \u043f\u0440\u0438 \u0437\u0430\u043f\u0438\u0441\u0438.

\"Erfahrung<\/center>
\"Erfahrung<\/center> <\/p>\n

Zus\u00e4tzlich kann erw\u00e4hnt werden, dass im September ein \u00e4hnlicher Grenzwert bei der Durchsatzrate in Tebibyte pro Sekunde im Exabyte-Speichercluster des CERN erreicht wurde, das auf dem offenen verteilten Speicher EOS basiert, das unter Verwendung des XRootD-Protokolls implementiert wurde.
\n
Quelle: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0418\u043d\u0436\u0435\u043d\u0435\u0440 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Clyso \u043e\u0431\u043e\u0431\u0449\u0438\u043b \u043e\u043f\u044b\u0442 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u043a\u043b\u0430\u0441\u0442\u0435\u0440\u0430 \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u043d\u0430 \u0431\u0430\u0437\u0435 \u043e\u0442\u043a\u0430\u0437\u043e\u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u043e\u0439 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Ceph \u0441 \u043f\u0440\u043e\u043f\u0443\u0441\u043a\u043d\u043e\u0439 \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u044c\u044e, \u043f\u0440\u0435\u0432\u044b\u0448\u0430\u044e\u0449\u0435\u0439 \u0442\u0435\u0431\u0438\u0431\u0430\u0439\u0442 \u0432 \u0441\u0435\u043a\u0443\u043d\u0434\u0443. \u041e\u0442\u043c\u0435\u0447\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u044d\u0442\u043e \u043f\u0435\u0440\u0432\u044b\u0439 \u043a\u043b\u0430\u0441\u0442\u0435\u0440 \u043d\u0430 \u0431\u0430\u0437\u0435 Ceph, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0441\u043c\u043e\u0433 \u0434\u043e\u0441\u0442\u0438\u0433\u043d\u0443\u0442\u044c \u043f\u043e\u0434\u043e\u0431\u043d\u043e\u0433\u043e \u043f\u043e\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044f, \u043d\u043e \u043f\u0435\u0440\u0435\u0434 \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u0435\u043c \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0430 \u0438\u043d\u0436\u0435\u043d\u0435\u0440\u0430\u043c \u043f\u043e\u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043b\u043e\u0441\u044c \u043f\u0440\u0435\u043e\u0434\u043e\u043b\u0435\u0442\u044c \u0441\u0435\u0440\u0438\u044e \u043d\u0435 \u043e\u0447\u0435\u0432\u0438\u0434\u043d\u044b\u0445 \u043f\u043e\u0434\u0432\u043e\u0434\u043d\u044b\u0445 \u043a\u0430\u043c\u043d\u0435\u0439. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0434\u043b\u044f \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u043d\u0430 10-20% \u0431\u044b\u043b\u043e […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":113019,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-113018","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Erfahrungen beim Aufbau eines Ceph-Speichers mit einer Durchsatzrate von Tebibyte pro Sekunde | ProHoster","description":"Ein Ingenieur der Firma Clyso hat die Erfahrungen beim Aufbau eines Speicherclusters auf Basis des ausfallsicheren verteilten Systems Ceph zusammengefasst, dessen Durchsatz Tebibyte pro Sekunde \u00fcbersteigt. Es wird hervorgehoben, dass dies der erste Cluster auf Basis von Ceph ist, der einen solchen Wert erreichen konnte. Allerdings mussten die Ingenieure eine Reihe von unauff\u00e4lligen Fallstricken \u00fcberwinden, um das pr\u00e4sentierte Ergebnis zu erzielen. Beispielsweise wurde eine Leistungssteigerung von 10-20% erzielt.","canonical_url":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/opyt-sozdaniya-hranilishha-ceph-c-propusknoj-sposobnostyu-tebibajt-v-sekundu","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"de_DE","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041e\u043f\u044b\u0442 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430 Ceph c \u043f\u0440\u043e\u043f\u0443\u0441\u043a\u043d\u043e\u0439 \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u044c\u044e 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