{"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\/es\/blog\/news\/opyt-sozdaniya-hranilishha-ceph-c-propusknoj-sposobnostyu-tebibajt-v-sekundu","title":{"rendered":"Experiencia en la creaci\u00f3n de un almacenamiento Ceph con un rendimiento de tebibytes por segundo.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Un ingeniero de la empresa Clyso resumi\u00f3 la experiencia de crear un cl\u00faster de almacenamiento basado en un sistema distribuido tolerante a fallos Ceph con un ancho de banda superior a un tebibyte por segundo. Se destaca que este es el primer cl\u00faster basado en Ceph que ha alcanzado una cifra as\u00ed, pero antes de conseguir este resultado, los ingenieros tuvieron que superar una serie de obst\u00e1culos no evidentes.    <\/p>\n<p>Por ejemplo, para aumentar el rendimiento en un 10-20%, fue suficiente habilitar en los servidores la opci\u00f3n de funcionamiento \u00fanicamente en modo de rendimiento m\u00e1ximo en la configuraci\u00f3n de ahorro de energ\u00eda del BIOS y desactivar c-state (c-state ajusta los par\u00e1metros de ahorro de energ\u00eda seg\u00fan la carga, lo que afecta a Ceph). Tambi\u00e9n se descubri\u00f3 que al utilizar unidades NVMe, el n\u00facleo de Linux gastaba un tiempo significativo en el manejo de bloqueos de tipo spin durante la actualizaci\u00f3n del mapeo de IOMMU. Desactivar IOMMU en el n\u00facleo condujo a un aumento notable en el rendimiento en las pruebas de escritura y lectura de bloques de 4MB.     <\/p>\n<p>Sin embargo, desactivar IOMMU no resolvi\u00f3 el problema de la ca\u00edda del rendimiento durante la escritura aleatoria de bloques de 4KB. Al investigar la situaci\u00f3n, los ingenieros encontraron correcciones en los scripts de compilaci\u00f3n de Ceph de los proyectos Gentoo y Ubuntu, que inclu\u00edan la compilaci\u00f3n con la opci\u00f3n RelWithDebInfo, ya que con ella en GCC se aplicaba el modo de optimizaci\u00f3n \u00ab-O2\u00bb, lo que aumentaba considerablemente el rendimiento de Ceph. La compilaci\u00f3n con la biblioteca TCMalloc tambi\u00e9n caus\u00f3 una disminuci\u00f3n en el rendimiento. Cambiar las banderas de compilaci\u00f3n y dejar de usar TCMalloc result\u00f3 en una reducci\u00f3n del tiempo de compactaci\u00f3n de tres veces y un aumento del rendimiento de las operaciones de escritura aleatorias en bloques de 4K de dos veces. Al final, tambi\u00e9n se optimizaron los ajustes de Reef RocksDB y los grupos de colocaci\u00f3n (PG).      <\/p>\n<p>El cl\u00faster est\u00e1 formado por 68 nodos basados en <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/es\/server\/\"   title=\"servidores\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1540\">servidores<\/a> Dell PowerEdge R6615 con CPU AMD EPYC 9454P 48C\/96T. Cada nodo contiene 10 unidades NVMe Dell de 15.36TB, dos adaptadores Ethernet 100GbE Mellanox ConnectX-6 y 192 GB de RAM. El software est\u00e1 basado en Ubuntu 20.04.6 y Ceph 17.2.7. En el cl\u00faster de 63 nodos se han levantado 630 OSD (Object Storage Daemon, proceso en segundo plano que gestiona el almacenamiento de datos en el almacenamiento local, uno por cada unidad NVMe), tres procesos MON (monitor, que sigue el estado del cl\u00faster) y un proceso MGR (Manager, servicio de gesti\u00f3n). La capacidad de almacenamiento es de 8.2 PB.      <\/p>\n<p>El ancho de banda durante las operaciones de lectura secuenciales de bloques de 4M fue de 1025 GiB\/s, y de escritura \u2014 270 GiB\/s. Durante la lectura aleatoria de bloques de 4KB, el rendimiento fue de 25.5 millones de operaciones de lectura por segundo y 4.9 millones durante la escritura. La inclusi\u00f3n del cifrado redujo el ancho de banda de lectura a aproximadamente 750 GiB\/s. Al implementar c\u00f3digos de correcci\u00f3n de errores EC62, el ancho de banda fue de 547 GiB\/s en lectura y 387 GiB\/s en escritura (la velocidad de escritura result\u00f3 ser superior a la de sin c\u00f3digos de correcci\u00f3n), y durante el acceso aleatorio se alcanzaron 3.4M IOPS en lectura y 936K IOPS en escritura.  <center><img decoding=\"async\" alt=\"Experiencia en la creaci\u00f3n de un almacenamiento Ceph con un rendimiento de tebibytes por segundo.\" src=\"\/wp-content\/uploads\/2024\/01\/515f3525e2194d8d91e3c582ff525cbb.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>  <center><img decoding=\"async\" alt=\"Experiencia en la creaci\u00f3n de un almacenamiento Ceph con un rendimiento de tebibytes por segundo.\" src=\"\/wp-content\/uploads\/2024\/01\/1adbb4ede16cf979a79f04468c52895c.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>        <\/p>\n<p>Adicionalmente, se puede mencionar que en septiembre se alcanz\u00f3 un hito similar en capacidad de transferencia en tebibytes por segundo en el cl\u00faster de almacenamiento de exabytes del CERN, implementado sobre el almacenamiento distribuido abierto EOS, construido sobre el protocolo XRootD.<br \/>\n<br \/>Fuente: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60470\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\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 [&hellip;]<\/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-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\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 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