{"id":84696,"date":"2020-06-10T01:42:59","date_gmt":"2020-06-09T23:42:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/hosting-i-vydelennye-servery-otvechaem-na-voprosy-chast-4"},"modified":"2020-06-10T01:42:59","modified_gmt":"2020-06-09T23:42:59","slug":"hosting-i-vydelennye-servery-otvechaem-na-voprosy-chast-4","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/administrirovanie\/hosting-i-vydelennye-servery-otvechaem-na-voprosy-chast-4","title":{"rendered":"Hosting \u0219i servere dedicate: r\u0103spundem la \u00eentreb\u0103ri. Partea 4","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00cen aceast\u0103 serie de articole, dorim s\u0103 abord\u0103m \u00eentreb\u0103rile care apar pentru persoanele care colaboreaz\u0103 cu furnizorii de hosting \u0219i servere dedicate \u00een special. Majoritatea discu\u021biilor au avut loc pe forumuri \u00een limba englez\u0103, \u00eencerc\u00e2nd s\u0103 ajut\u0103m utilizatorii, \u00een primul r\u00e2nd, cu sfaturi, nu cu auto-reclam\u0103, oferind r\u0103spunsuri c\u00e2t mai detaliate \u0219i impar\u021biale, av\u00e2nd \u00een vedere c\u0103 experien\u021ba noastr\u0103 \u00een domeniu este de peste 14 ani, cu sute de solu\u021bii implementate cu succes \u0219i mii de clien\u021bi mul\u021bumi\u021bi. Cu toate acestea, r\u0103spunsurile noastre nu ar trebui considerate ca fiind cele corecte definitive, ele pot con\u021bine imprecizii \u0219i chiar erori, nimeni nu este perfect. Am aprecia dac\u0103 a\u021bi completa sau corecta aceste r\u0103spunsuri \u00een comentarii.<\/p>\n<p><img decoding=\"async\" alt=\"Hosting \u0219i servere dedicate: r\u0103spundem la \u00eentreb\u0103ri. Partea 4\" src=\"\/wp-content\/uploads\/2020\/06\/6c6193381944ee907aec3ebe258b38f7.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/ua-hosting\/blog\/424055\/\">Hosting \u0219i servere dedicate: r\u0103spundem \u00eentreb\u0103rilor. Partea 1<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/ua-hosting\/blog\/505074\/\">Hosting \u0219i servere dedicate: r\u0103spundem \u00eentreb\u0103rilor. Partea 2. De ce este internetul at\u00e2t de scump \u00een centrele de date?<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/ua-hosting\/blog\/490192\/\">Hosting \u0219i servere dedicate: r\u0103spundem \u00eentreb\u0103rilor. Partea 3<\/a><\/noindex><\/p>\n<blockquote><p>De ce costul unui server cu limit\u0103 de trafic de 100 TB \u0219i l\u0103\u021bime de band\u0103 de 1 Gbit\/s este mult mai mic dec\u00e2t costul unui server cu l\u0103\u021bime de band\u0103 de 1 Gbit\/s f\u0103r\u0103 limit\u0103 de trafic? Deoarece dac\u0103 arenda\u021bi 2-3 servere cu l\u0103\u021bime de band\u0103 de 1 Gbit\/s \u0219i limit\u0103 de 100 TB, ve\u021bi consuma exact at\u00e2t c\u00e2t ar consuma un server cu 1 Gbps Unmetered, sau chiar mai mult \u00een v\u00e2rfuri, av\u00e2nd \u00een vedere c\u0103 furnizorul ofer\u0103 de fapt mai mult hardware, mai multe conexiuni \u0219i un pre\u021b mai mic?<\/p><\/blockquote>\n<p>\nProblema este c\u0103 furnizorii, oferind servere cu limite de trafic destul de mari sau chiar \u00abf\u0103r\u0103 limit\u0103\u00bb la pre\u021buri mici, iau \u00een considerare profilele medii de consum ale clien\u021bilor lor. S-a dovedit c\u0103 majoritatea clien\u021bilor care achizi\u021bioneaz\u0103 astfel de canale nu folosesc pe deplin conexiunea oferit\u0103. Datorit\u0103 acestui fapt, devine posibil s\u0103 se fac\u0103 astfel de oferte.<\/p>\n<p>100 TB de trafic este o limit\u0103 destul de mare. Este mai mult dec\u00e2t 100 Mbps Unmetered. Cu un canal de 100 Mbit\/s, f\u0103r\u0103 restric\u021bii, se poate transfera maximum 100 (viteza \u00een megabi\u021bi) * 86400 (num\u0103rul de secunde \u00eentr-o zi) * 30 (zile) \/ 8 (bi\u021bi \u00een octe\u021bi) \/ 1000 (megabytes \u00een gigabytes, dac\u0103 consider\u0103m 1000 \u0219i nu 1024, 1024 fiind bi\u021bi \u00een kibibi\u021bi) = 32 400 GB pe lun\u0103 \u00een fiecare direc\u021bie, cu o utilizare constant\u0103 a canalului de 100%. Totu\u0219i, a\u0219a cum \u0219tim, serverele nu consum\u0103 trafic constant \u0219i, foarte des, curbele de consum zilnic pot ar\u0103ta astfel:<\/p>\n<p><img decoding=\"async\" alt=\"Hosting \u0219i servere dedicate: r\u0103spundem la \u00eentreb\u0103ri. Partea 4\" src=\"\/wp-content\/uploads\/2020\/06\/69868a80638b141881d5aebf086548e2.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nUnii clien\u021bi pot atinge picuri maxime ale capacit\u0103\u021bii de transfer \u0219i pot necesita un adev\u0103rat 1 Gbit\/s \u00een aceste momente. Totu\u0219i, limita total\u0103 de trafic pe lun\u0103 poate fi aproape neafectat\u0103:<\/p>\n<p><img decoding=\"async\" alt=\"Hosting \u0219i servere dedicate: r\u0103spundem la \u00eentreb\u0103ri. Partea 4\" src=\"\/wp-content\/uploads\/2020\/06\/56ed1976af283943c81437d6971e0cd5.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nAce\u0219ti clien\u021bi, desigur, nu sunt foarte profitabili pentru furnizori \u0219i de aceea furnizorul \u00eencearc\u0103 s\u0103-i mute pe Unmetered, deoarece, dac\u0103 ofer\u0103 servicii clien\u021bilor dintr-o singur\u0103 zon\u0103, este probabil ca picurile de consum s\u0103 se suprapun\u0103, iar acest \u201eadev\u0103rat\u201d gigabit s\u0103 poat\u0103 fi v\u00e2ndut doar la 1,2 clien\u021bi. Dac\u0103 furnizorul are clien\u021bi din diferite regiuni, este foarte probabil ca canalul s\u0103 poat\u0103 fi v\u00e2ndut simultan dou\u0103 sau mai multor abona\u021bi, deoarece picurile de consum ale audien\u021belor vor c\u0103dea \u00een momente diferite. \u00cen realitate, foarte pu\u021bini clien\u021bi consum\u0103 limita de 100 TB, a\u0219a c\u0103 oferirea serverelor cu o limit\u0103 de 100 TB trafic este extrem de profitabil\u0103. <\/p>\n<p>Mai mult, conect\u00e2nd la rack-uri canale de 10 gigabi\u021bi, reu\u0219im s\u0103 \u00eemp\u0103r\u021bim foarte eficient traficul \u00eentre toate. Reu\u0219im s\u0103 \u00eemp\u0103r\u021bim canalul de 10 Gbit\/s \u00een medie pe 5 rack-uri, umplute cu servere cu limit\u0103 de 100 TB. Acest lucru \u00eenseamn\u0103 aproximativ 150 de servere. Deoarece un rack cu \u00een\u0103l\u021bimea de 47 de unit\u0103\u021bi poate g\u0103zdui fie 41 de servere de un unit, fie 21 de servere de dou\u0103 unit\u0103\u021bi. <\/p>\n<p>\u00cen urma analizei, consumul total al canalului devine urm\u0103torul:<\/p>\n<p><img decoding=\"async\" alt=\"Hosting \u0219i servere dedicate: r\u0103spundem la \u00eentreb\u0103ri. Partea 4\" src=\"\/wp-content\/uploads\/2020\/06\/6f212333591fd7cf64d265eb52a33b75.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDac\u0103 se refuz\u0103 serviciul abona\u021bilor care genereaz\u0103 mult trafic (contributia principal\u0103 la utilizarea canalului este f\u0103cut\u0103 de mai pu\u021bin de 10 servere din cele 150 prezente pe acest port), atunci num\u0103rul serverelor poate fi crescut la 300 \u0219i mai mult. \u0218i toat\u0103 lumea va fi mul\u021bumit\u0103 \u0219i toat\u0103 lumea va avea suficient trafic. <\/p>\n<p>Totu\u0219i, exist\u0103 \u0219i alte metode prin care se poate economisi f\u0103r\u0103 a nemul\u021bumi abona\u021bii \u2014 conectarea unei linii de tranzit mai ieftine sau trimiterea traficului c\u0103tre un punct de schimb sau peer to peer gratuit, dac\u0103 sunte\u021bi un mare generator de trafic. <\/p>\n<p>Exact acest lucru permite men\u021binerea pre\u021burilor sc\u0103zute, f\u0103r\u0103 a refuza clien\u021bii de asisten\u021b\u0103, pl\u0103tind furnizorilor de tranzi\u021bie \u00eentre 1500 \u0219i 6000 de euro pentru fiecare 10G, \u00een func\u021bie de c\u00e2t de bun este furnizorul de tranzi\u021bie, \u0219i v\u00e2nz\u00e2nd conectivitatea sub costul real cu un coeficient specific de overselling, c\u00e2nd fiecare client are propriul canal dedicat, f\u0103r\u0103 a se \u00eempiedica unul pe altul. <\/p>\n<p>Devine clar de ce pre\u021bul pentru 1Gbps Unmetered este semnificativ mai mare, deoarece, dac\u0103 cu serverele de 100 terabytes, nu fiecare consum\u0103 limita sa, clientul care comand\u0103 1Gbps Unmetered va consuma, cu siguran\u021b\u0103, cea mai mare parte a canalului. De\u0219i am v\u0103zut excep\u021bia men\u021bionat\u0103 mai sus \u0219i exemplul cum se poate genera aproape 1 Gbps de trafic \u00een v\u00e2rfuri \u0219i totu\u0219i s\u0103 se \u00eencadreze \u00een limita de 100 terabyte, aceasta r\u0103m\u00e2ne o excep\u021bie, nu un model tipic. <\/p>\n<blockquote><p>Administratorul meu a instalat programul vnstatd pe server, iar traficul este monitorizat de pe interfa\u021b\u0103, la fiecare 5 minute. Acesta contabilizeaz\u0103 tot? A\u0219adar, \u00eemi arat\u0103 c\u0103 am folosit 87 TB, \u00een timp ce furnizorul spune c\u0103 am folosit 96 TB \u0219i traficul este aproape epuizat. Am \u00eencredere \u00een administratorul meu, este un specialist excelent. \u0218i dac\u0103 spune c\u0103 furnizorul supraestimeaz\u0103 consumul \u2014 atunci a\u0219a este. Cu at\u00e2t mai mult cu c\u00e2t acest lucru este sus\u021binut de faptul c\u0103 au \u00eenceput s\u0103 joace cu valorile, oferind \u00een cadrul discu\u021biei valori diferite pentru trafic \u00een aceea\u0219i perioad\u0103. R\u0103spunsul la \u00eentrebarea \u201ecum a\u0219a?\u201d \u00eenc\u0103 \u00eel a\u0219tept\u0103m.<\/p><\/blockquote>\n<p>Problema este c\u0103 unele programe de contabilizare a traficului \u00eenregistreaz\u0103 datele \u00een TiB, nu \u00een TB. \u00cen tebibai\u021bi, nu \u00een terabai\u021bi. Asta \u00eenseamn\u0103 c\u0103 contabilizarea se face pe baza sistemului binar, nu zecimal, pe baza faptului c\u0103 \u00een kilobyte, mai exact \u00een kibibyte \u2014 1024 bytes, nu 1000.<\/p>\n<p>Este de men\u021bionat c\u0103, pentru a nu folosi aceast\u0103 diferen\u021b\u0103 \u00een scopuri de marketing, ISO (Organiza\u021bia Interna\u021bional\u0103 de Standardizare) a introdus de mult prefixele \u201ebi\u201d pentru byte-urile binare, adic\u0103 kibibyte, mebibyte, gibibyte, tebibyte. Cu toate acestea, marketingul a avut loc, iar dac\u0103 produc\u0103torii de stocare reu\u0219esc s\u0103 indice capacit\u0103\u021bi mai mici datorit\u0103 byte-urilor zecimale, \u00een ceea ce prive\u0219te m\u0103surarea \u0219i monitorizarea traficului, situa\u021bia este invers\u0103. Un furnizor de hosting, oferind 100 TB de trafic, de fapt ofer\u0103 mai pu\u021bin dec\u00e2t ar putea fi \u00een realitate, dac\u0103 se consider\u0103 dup\u0103 sistemul binar.<\/p>\n<p>Ar p\u0103rea c\u0103 diferen\u021ba este nesemnificativ\u0103, doar 24 de byte la 1000, precisiona rezultat\u00e2nd \u00een doar 2,4%, dar de ce se ob\u021bine o astfel de diferen\u021b\u0103, la nivel de 10%? Oare nu s-a luat \u00een considerare un anumit trafic?<\/p>\n<p>Problema este c\u0103 nu trebuie uitat c\u0103 \u201eeroarea\u201d cre\u0219te, \u0219i anume:<\/p>\n<p>1024 byte \u00eentr-un kibibyte (dac\u0103 ne referim conform standardelor ISO), \u00een mebibyte deja 1024*1024 = 1 048 576 byte, \u00een gibibyte \u2014 1024*1024*1024 = 1 073 741 824, iar \u00een tebibyte \u2014 1024*1024*1024*1024 = 1 099 511 627 776.<\/p>\n<p>O \u00eentors\u0103tur\u0103 nea\u0219teptat\u0103? Da?<\/p>\n<p>Atunci c\u00e2nd se m\u0103soar\u0103 traficul \u00een teraby\u021bi, diferen\u021ba \u00eentre unit\u0103\u021bile de m\u0103sur\u0103 este de fapt de 10%!<\/p>\n<p><img decoding=\"async\" alt=\"Hosting \u0219i servere dedicate: r\u0103spundem la \u00eentreb\u0103ri. Partea 4\" src=\"\/wp-content\/uploads\/2020\/06\/ca374353bc2cc14823f468908da7b409.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Mai mult, diferen\u021ba \u00een datele preluate din portul switch-ului \u0219i din portul serverului poate fi cauzat\u0103 de un atac DDOS, care nu ajunge la client \u0219i poate fi eliminat\u0103 la nivel de \u201erouter\u201d, totu\u0219i consumul de trafic are loc. <\/p>\n<p>De asemenea, nu trebuie uitat c\u0103 uneori programul nu contorizeaz\u0103 traficul de pe toate porturile, iar un anumit trafic poate \u201esc\u0103pa\u201d de monitorizare. <\/p>\n<p>De asemenea, trebuie men\u021bionat c\u0103, atunci c\u00e2nd se ofer\u0103 trafic limitat, de obicei se consider\u0103 traficul total intrare + ie\u0219ire, iar dac\u0103 ave\u021bi, s\u0103 spunem, un serviciu VPN, raportul va fi de 1 la 1 iar clien\u021bii dvs. vor putea consuma \u00een total nu mai mult de 50 TB de trafic la un limit\u0103 de 100.<\/p>\n<p>Continuarea urmeaz\u0103...<\/p>\n<h3>Pu\u021bin publicitate \ud83d\ude42<\/h3>\n<p>\nMul\u021bumim c\u0103 r\u0103m\u00e2ne\u021bi cu noi. V\u0103 plac articolele noastre? Dori\u021bi s\u0103 vede\u021bi mai multe materiale interesante? Sus\u021bine\u021bi-ne, efectu\u00e2nd o comand\u0103 sau recomand\u00e2ndu-ne prietenilor, <noindex><a rel=\"nofollow\" href=\"https:\/\/ua-hosting.company\/cloudvps\/nl\">VPS cloud pentru dezvoltatori de la 4,99 $<\/a><\/noindex>, <b>un echivalent unic pentru serverele entry-level, care a fost creat de noi pentru voi:<\/b> <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/company\/ua-hosting\/blog\/347386\/\">Toat\u0103 adev\u0103rul despre VPS (KVM) E5-2697 v3 (6 nuclee) 10GB DDR4 480GB SSD 1Gbps de la 19 $ sau cum s\u0103 \u00eemp\u0103r\u021bi\u021bi corect un server?<\/a><\/noindex> (sunt disponibile op\u021biuni cu RAID1 \u0219i RAID10, p\u00e2n\u0103 la 24 nuclee \u0219i p\u00e2n\u0103 la 40GB DDR4).<\/p>\n<p><b>Dell R730xd la jum\u0103tate de pre\u021b \u00een centrul de date Equinix Tier IV din Amsterdam?<\/b> Numai la noi <b><noindex><a rel=\"nofollow\" href=\"https:\/\/ua-hosting.company\/serversnl\">2 x Intel TetraDeca-Core Xeon 2x E5-2697v3 2.6GHz 14C 64GB DDR4 4x960GB SSD 1Gbps 100 TB de la 199 $<\/a><\/noindex> \u00een Olanda! <b>Dell R420 \u2014 2x E5-2430 2.2Ghz 6C 128GB DDR3 2x960GB SSD 1Gbps 100TB \u2014 de la 99 $!<\/b><\/b> Citi\u021bi despre <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/company\/ua-hosting\/blog\/329618\/\">Cum s\u0103 construi\u021bi o infrastructur\u0103 de clas\u0103 enterprise folosind servere Dell R730xd E5-2650 v4 la pre\u021buri foarte mici de 9000 \u20ac?<\/a><\/noindex><br \/>\n<br \/>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/ua-hosting\/blog\/505802\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u044d\u0442\u043e\u0439 \u0441\u0435\u0440\u0438\u0438 \u0441\u0442\u0430\u0442\u0435\u0439 \u043c\u044b \u0445\u043e\u0442\u0438\u043c \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u0432\u043e\u043f\u0440\u043e\u0441\u044b, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u044e\u0442 \u0443 \u043b\u044e\u0434\u0435\u0439 \u043f\u0440\u0438 \u0440\u0430\u0431\u043e\u0442\u0435 \u0441 \u0445\u043e\u0441\u0442\u0438\u043d\u0433-\u043f\u0440\u043e\u0432\u0430\u0439\u0434\u0435\u0440\u0430\u043c\u0438 \u0438 \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u044b\u043c\u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430\u043c\u0438 \u0432 \u0447\u0430\u0441\u0442\u043d\u043e\u0441\u0442\u0438. \u0411\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u043e \u0438\u0437 \u043e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0439 \u043c\u044b \u0432\u0435\u043b\u0438 \u043d\u0430 \u0430\u043d\u0433\u043b\u043e\u044f\u0437\u044b\u0447\u043d\u044b\u0445 \u0444\u043e\u0440\u0443\u043c\u0430\u0445, \u0441\u0442\u0430\u0440\u0430\u044f\u0441\u044c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u043c \u0432 \u043f\u0435\u0440\u0432\u0443\u044e \u043e\u0447\u0435\u0440\u0435\u0434\u044c \u043f\u043e\u043c\u043e\u0447\u044c \u0441\u043e\u0432\u0435\u0442\u043e\u043c, \u0430 \u043d\u0435 \u0441\u0430\u043c\u043e\u0440\u0435\u043a\u043b\u0430\u043c\u043e\u0439, \u0434\u0430\u0432 \u043c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0434\u0440\u043e\u0431\u043d\u044b\u0439 \u0438 \u0431\u0435\u0441\u043f\u0440\u0438\u0441\u0442\u0440\u0430\u0441\u0442\u043d\u044b\u0439 \u043e\u0442\u0432\u0435\u0442, \u0432\u0435\u0434\u044c \u043d\u0430\u0448 \u043e\u043f\u044b\u0442 \u0432 \u0441\u0444\u0435\u0440\u0435 \u0443\u0436\u0435 \u0441\u0432\u044b\u0448\u0435 14 \u043b\u0435\u0442, \u0441\u043e\u0442\u043d\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":84697,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-84696","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - 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