{"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":"ramdisk-toacceleration-creates","status":"publish","type":"post","link":"https:\/\/webhosting.de\/pt\/ramdisk-zur-beschleunigung-erstellen\/","title":{"rendered":"Criando Ramdisk para acelerar o Amavis no Linux"},"content":{"rendered":"

No uso di\u00e1rio de um servidor web alguns servi\u00e7os caem sobre o com pedidos cada vez mais longos para processar um pedido e assim carregar o servidor.
\nUm exemplo t\u00edpico \u00e9 a interface entre o servidor de e-mail e o verificador de v\u00edrus: Amavis, que salva temporariamente os e-mails e os l\u00ea novamente. Isto cria naturalmente uma alta demanda para acesso aos discos r\u00edgidos ou SSDs em sistemas maiores.
\nAqui \u00e9 poss\u00edvel armazenar estas opera\u00e7\u00f5es de arquivo na mem\u00f3ria de trabalho, a fim de garantir um processamento consideravelmente mais r\u00e1pido.<\/p>\n

Outros exemplos seriam o diret\u00f3rio \/tmp em si no diret\u00f3rio php<\/a> arquivos de sess\u00e3o, ou mesmo arquivos de log.<\/p>\n

Ao salvar na RAM, h\u00e1 sempre o risco de perda devido a um defeito no sistema ou a um rein\u00edcio do servidor. Portanto, voc\u00ea deve sempre apenas salvar sem import\u00e2ncia Dados<\/a> armazenar l\u00e1, ou providenciar um backup regular.<\/p>\n

Um RAMDISK para Amavis pode ser facilmente criado com alguns comandos.<\/p>\n

Para configurar um ramdisk precisamos do diret\u00f3rio onde o Amavis armazena os arquivos e a identifica\u00e7\u00e3o do usu\u00e1rio e do grupo.<\/p>\n

Ambos podem ser feitos mais facilmente com<\/p>\n

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

l\u00ea l\u00e1.<\/p>\n

amavis:x:497:497:Amavis usu\u00e1rio de scan de e-mail:\/var\/amavis:\/bin\/sh<\/p>\n

O caminho neste exemplo \u00e9 \/var\/amavis. Os arquivos tempor\u00e1rios s\u00e3o ent\u00e3o armazenados no diret\u00f3rio \/var\/amavis\/tmp. Para este diret\u00f3rio, queremos criar um ramdisk.<\/p>\n

O ID do usu\u00e1rio \u00e9 o primeiro n\u00famero 497 seguido do ID do grupo que, neste caso, tamb\u00e9m \u00e9 497.<\/p>\n

Em \/etc\/fstab introduzimos agora a seguinte linha para garantir que o ramdisk \u00e9 criado mesmo ap\u00f3s uma reinicializa\u00e7\u00e3o<\/p>\n

tmpfs \/var\/amavis\/tmp tmpfs padr\u00e3o,tamanho=256m,mode=750,uid=497,gid=497 0 0<\/p>\n

O tamanho do ramdisk n\u00e3o deve ser muito pequeno, porque o amavis rejeitar\u00e1 os e-mails se o limite for ultrapassado. 256MB s\u00e3o suficientes na maioria dos casos.<\/p>\n

Voc\u00ea pode determinar a demanda atual com<\/p>\n

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

investigar. O resultado por exemplo, 11M \/var\/amavis\/tmp indica ent\u00e3o quantos megabytes j\u00e1 est\u00e3o no diret\u00f3rio. Deve-se notar, no entanto, que nos dias com um volume de correio elevado devido a Spam<\/a> ou anexos de arquivos grandes, \u00e9 claro que \u00e9 necess\u00e1rio mais espa\u00e7o.<\/p>\n

Em caso de emerg\u00eancia, por\u00e9m, o ramdisk ainda pode ser removido ou ampliado.<\/p>\n

Agora podemos simplesmente montar o ramdisk com<\/p>\n

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

Via<\/p>\n

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

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

podemos ent\u00e3o detectar que o nosso ramdisk est\u00e1 activo e vazio.<\/p>\n

A partir de agora, o processamento amavis \u00e9 extremamente 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":"4983","_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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