{"id":4174,"date":"2020-10-30T19:54:59","date_gmt":"2020-10-30T18:54:59","guid":{"rendered":"https:\/\/webhosting.de\/ramdisk-zur-beschleunigung-erstellen\/"},"modified":"2021-07-15T13:06:06","modified_gmt":"2021-07-15T12:06:06","slug":"ramdiscos-para-acelerar-la-creacion","status":"publish","type":"post","link":"https:\/\/webhosting.de\/es\/ramdisk-zur-beschleunigung-erstellen\/","title":{"rendered":"Creando Ramdisk para acelerar Amavis bajo Linux"},"content":{"rendered":"

En el uso diario de un servidor web algunos servicios caen en el con el aumento de solicitudes cada vez m\u00e1s largas para procesar una solicitud y as\u00ed cargar el servidor.
\nUn ejemplo t\u00edpico es la interfaz entre el servidor de correo y el esc\u00e1ner de virus: Amavis, que guarda temporalmente los correos electr\u00f3nicos y los vuelve a leer. Esto crea naturalmente una gran demanda de acceso a los discos duros o SSD en sistemas m\u00e1s grandes.
\nAqu\u00ed es posible almacenar estas operaciones de archivo en la memoria de trabajo para garantizar un procesamiento considerablemente m\u00e1s r\u00e1pido.<\/p>\n

Otros ejemplos ser\u00edan el propio directorio \/tmp en el php<\/a> archivos de sesi\u00f3n, o incluso archivos de registro.<\/p>\n

Al guardar en la RAM, siempre existe el riesgo de p\u00e9rdida por un defecto en el sistema o un reinicio del servidor. Por lo tanto, siempre debes guardar s\u00f3lo lo que no sea importante... Datos<\/a> almacenar all\u00ed, o prever una copia de seguridad peri\u00f3dica.<\/p>\n

Un RAMDISK para Amavis puede ser creado f\u00e1cilmente con unos pocos comandos.<\/p>\n

Para configurar un ramdisk necesitamos el directorio donde Amavis almacena los archivos y el ID de usuario y grupo.<\/p>\n

Ambas cosas se pueden hacer m\u00e1s f\u00e1cilmente con<\/p>\n

grep 'amavis' \/etc\/passwd<\/span> <\/p>\n

leer en voz alta.<\/p>\n

amavis:x:497:497:Amavis email scan usuario:\/var\/amavis:\/bin\/sh<\/p>\n

El camino en este ejemplo es \/var\/amavis. Los archivos temporales se almacenan en el directorio \/var\/amavis\/tmp. Para este directorio queremos crear un ramdisk.<\/p>\n

El ID de usuario es el primer n\u00famero 497 seguido del ID de grupo que en este caso tambi\u00e9n es 497.<\/p>\n

En \/etc\/fstab ahora entramos en la siguiente l\u00ednea para asegurarnos de que el ramdisk se crea incluso despu\u00e9s de un reinicio<\/p>\n

tmpfs \/var\/amavis\/tmp tmpfs defaults,size=256m,mode=750,uid=497,gid=497 0 0<\/p>\n

El tama\u00f1o del ramdisk no debe ser demasiado peque\u00f1o, porque amavis rechazar\u00e1 los correos electr\u00f3nicos si se excede el l\u00edmite. 256MB son suficientes en la mayor\u00eda de los casos.<\/p>\n

Puede determinar la demanda actual con<\/p>\n

tu -hs \/var\/amavis\/tmp<\/span><\/p>\n

investigar. El resultado, por ejemplo 11M \/var\/amavis\/tmp, indica entonces cu\u00e1ntos megabytes hay ya en el directorio. No obstante, cabe se\u00f1alar tambi\u00e9n que en los d\u00edas con un alto volumen de correo debido a Spam<\/a> o archivos adjuntos de gran tama\u00f1o, por supuesto que se necesita m\u00e1s espacio.<\/p>\n

Sin embargo, en caso de emergencia, el ramdisk puede ser retirado o agrandado.<\/p>\n

Ahora podemos simplemente montar el ramdisk con<\/p>\n

monte \/var\/amavis\/tmp<\/span><\/p>\n

A trav\u00e9s de<\/p>\n

df -h<\/span><\/p>\n

tmpfs 512M 0 512M 0% \/var\/amavis\/tmp<\/p>\n

podemos entonces detectar que nuestro ramdisk est\u00e1 activo y vac\u00edo.<\/p>\n

A partir de ahora el procesamiento del amavis es extremadamente r\u00e1pido.<\/p>","protected":false},"excerpt":{"rendered":"

Im t\u00e4glichen Gebrauch eines Webservers fallen einige Dienste auf die mit steigenden Anfragen immer l\u00e4nger brauchen um eine Anfrage zu bearbeiten und somit den Server belasten. Ein typisches Beispiel ist die Schnittstelle zwischen Mailserver und Virusscanner: Amavis, der die eMails tempor\u00e4r speichert und wieder liest. Dies erzeugt nat\u00fcrlich bei gr\u00f6\u00dferen Anlagen einen hohen Bedarf an […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_crdt_document":"","inline_featured_image":false,"footnotes":""},"categories":[780,700,995],"tags":[172,173,117,174],"class_list":["post-4174","post","type-post","status-publish","format-standard","hentry","category-administration-anleitungen","category-anleitungen","category-hilfe","tag-amavis","tag-beschleunigen","tag-linux","tag-ramdisk"],"acf":[],"_wp_attached_file":null,"_wp_attachment_metadata":null,"litespeed-optimize-size":null,"litespeed-optimize-set":null,"_elementor_source_image_hash":null,"_wp_attachment_image_alt":null,"stockpack_author_name":null,"stockpack_author_url":null,"stockpack_provider":null,"stockpack_image_url":null,"stockpack_license":null,"stockpack_license_url":null,"stockpack_modification":null,"color":null,"original_id":null,"original_url":null,"original_link":null,"unsplash_location":null,"unsplash_sponsor":null,"unsplash_exif":null,"unsplash_attachment_metadata":null,"_elementor_is_screenshot":null,"surfer_file_name":null,"surfer_file_original_url":null,"envato_tk_source_kit":null,"envato_tk_source_index":null,"envato_tk_manifest":null,"envato_tk_folder_name":null,"envato_tk_builder":null,"envato_elements_download_event":null,"_menu_item_type":null,"_menu_item_menu_item_parent":null,"_menu_item_object_id":null,"_menu_item_object":null,"_menu_item_target":null,"_menu_item_classes":null,"_menu_item_xfn":null,"_menu_item_url":null,"_trp_menu_languages":null,"rank_math_primary_category":null,"rank_math_title":null,"inline_featured_image":null,"_yoast_wpseo_primary_category":null,"rank_math_schema_blogposting":null,"rank_math_schema_videoobject":null,"_oembed_049c719bc4a9f89deaead66a7da9fddc":null,"_oembed_time_049c719bc4a9f89deaead66a7da9fddc":null,"_yoast_wpseo_focuskw":"ramdisk","_yoast_wpseo_linkdex":null,"_oembed_27e3473bf8bec795fbeb3a9d38489348":null,"_oembed_c3b0f6959478faf92a1f343d8f96b19e":null,"_trp_translated_slug_en_us":null,"_wp_desired_post_slug":null,"_yoast_wpseo_title":null,"tldname":null,"tldpreis":null,"tldrubrik":null,"tldpolicylink":null,"tldsize":null,"tldregistrierungsdauer":null,"tldtransfer":null,"tldwhoisprivacy":null,"tldregistrarchange":null,"tldregistrantchange":null,"tldwhoisupdate":null,"tldnameserverupdate":null,"tlddeletesofort":null,"tlddeleteexpire":null,"tldumlaute":null,"tldrestore":null,"tldsubcategory":null,"tldbildname":null,"tldbildurl":null,"tldclean":null,"tldcategory":null,"tldpolicy":null,"tldbesonderheiten":null,"tld_bedeutung":null,"_oembed_d167040d816d8f94c072940c8009f5f8":null,"_oembed_b0a0fa59ef14f8870da2c63f2027d064":null,"_oembed_4792fa4dfb2a8f09ab950a73b7f313ba":null,"_oembed_33ceb1fe54a8ab775d9410abf699878d":null,"_oembed_fd7014d14d919b45ec004937c0db9335":null,"_oembed_21a029d076783ec3e8042698c351bd7e":null,"_oembed_be5ea8a0c7b18e658f08cc571a909452":null,"_oembed_a9ca7a298b19f9b48ec5914e010294d2":null,"_oembed_f8db6b27d08a2bb1f920e7647808899a":null,"_oembed_168ebde5096e77d8a89326519af9e022":null,"_oembed_cdb76f1b345b42743edfe25481b6f98f":null,"_oembed_87b0613611ae54e86e8864265404b0a1":null,"_oembed_27aa0e5cf3f1bb4bc416a4641a5ac273":null,"_oembed_time_27aa0e5cf3f1bb4bc416a4641a5ac273":null,"_tldname":null,"_tldclean":null,"_tldpreis":null,"_tldcategory":null,"_tldsubcategory":null,"_tldpolicy":null,"_tldpolicylink":null,"_tldsize":null,"_tldregistrierungsdauer":null,"_tldtransfer":null,"_tldwhoisprivacy":null,"_tldregistrarchange":null,"_tldregistrantchange":null,"_tldwhoisupdate":null,"_tldnameserverupdate":null,"_tlddeletesofort":null,"_tlddeleteexpire":null,"_tldumlaute":null,"_tldrestore":null,"_tldbildname":null,"_tldbildurl":null,"_tld_bedeutung":null,"_tldbesonderheiten":null,"_oembed_ad96e4112edb9f8ffa35731d4098bc6b":null,"_oembed_8357e2b8a2575c74ed5978f262a10126":null,"_oembed_3d5fea5103dd0d22ec5d6a33eff7f863":null,"_eael_widget_elements":null,"_oembed_0d8a206f09633e3d62b95a15a4dd0487":null,"_oembed_time_0d8a206f09633e3d62b95a15a4dd0487":null,"_aioseo_description":null,"_eb_attr":null,"_eb_data_table":null,"_oembed_819a879e7da16dd629cfd15a97334c8a":null,"_oembed_time_819a879e7da16dd629cfd15a97334c8a":null,"_acf_changed":null,"_wpcode_auto_insert":null,"_edit_last":null,"_edit_lock":null,"_oembed_e7b913c6c84084ed9702cb4feb012ddd":null,"_oembed_bfde9e10f59a17b85fc8917fa7edf782":null,"_oembed_time_bfde9e10f59a17b85fc8917fa7edf782":null,"_oembed_03514b67990db061d7c4672de26dc514":null,"_oembed_time_03514b67990db061d7c4672de26dc514":null,"rank_math_news_sitemap_robots":"index","rank_math_robots":["index"],"_eael_post_view_count":"4974","_trp_automatically_translated_slug_ru_ru":null,"_trp_automatically_translated_slug_et":"ramdisk-to-accelerate-create","_trp_automatically_translated_slug_lv":"ramdisk-to-accelerate-create","_trp_automatically_translated_slug_fr_fr":null,"_trp_automatically_translated_slug_en_us":null,"_wp_old_slug":null,"_trp_aut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