{"id":34468,"date":"2019-10-31T21:58:31","date_gmt":"2019-10-31T18:58:31","guid":{"rendered":"https:\/\/prohoster.info\/blog\/o-toporah-i-kapuste\/"},"modified":"2019-10-31T21:58:31","modified_gmt":"2019-10-31T18:58:31","slug":"o-toporah-i-kapuste","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/administrirovanie\/o-toporah-i-kapuste","title":{"rendered":"Despre topoare \u0219i varz\u0103","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<h4>Reflec\u021bii despre sursa dorin\u021bei de a ob\u021bine o certificare <i>AWS Solutions Architect Associate<\/i>.<\/h4>\n<p>\n<b>Motivul \u00eent\u00e2i: \u201eToporii\u201d<\/b><\/p>\n<p>Unul dintre cele mai utile principii pentru orice profesionist este \u201eCunoa\u0219te-\u021bi uneltele\u201d (sau \u00eentr-una dintre variantele \u201e<noindex><a rel=\"nofollow\" href=\"http:\/\/www.marketch.ru\/marketing_marginalia\/stiven-kovi-tupaya-pila\/\">ascute fer\u0103str\u0103ul<\/a><\/noindex>\u00bb).<\/p>\n<p>Noi suntem \u00een cloud de mult timp, dar p\u00e2n\u0103 acum au fost doar aplica\u021bii monolitice cu baze de date, desf\u0103\u0219urate pe instan\u021be EC2 \u2014 ieftin \u0219i eficient.<\/p>\n<p>Dar, treptat, ne-am sim\u021bit constr\u00e2n\u0219i \u00een cadrul monolitului. Am decis s\u0103 ne \u00eemp\u0103r\u021bim \u00een mod bun \u2013 s\u0103 ne modulariz\u0103m, iar apoi s\u0103 adopt\u0103m \u00een prezent microserviciile. \u0218i foarte repede, pe aceast\u0103 temelie, \u201e\u00eenfloresc o sut\u0103 de flori\u201d. <\/p>\n<p>Dar, ce s\u0103 mai c\u0103ut\u0103m departe \u2013 proiectul de logare a activit\u0103\u021bii pe care \u00eel conduc acum include:<\/p>\n<ul>\n<li> Clien\u021bi sub forma unor aplica\u021bii diverse ale produsului nostru \u2013 de la col\u021buri \u00eentunecate de legacitate p\u00e2n\u0103 la microservicii ultra-moderne pe .Net Core.<\/li>\n<li> Cozi Amazon SQS, \u00een care se adun\u0103 loguri despre ceea ce se \u00eent\u00e2mpl\u0103 cu clien\u021bii. <\/li>\n<li> Un microserviciu pe .Net Core, care preia mesaje din coad\u0103 \u0219i le trimite \u00een Amazon Kinesis Data Streams (KDS). Acesta are de asemenea o interfa\u021b\u0103 Web API \u0219i swagger UI ca canal duplicat \u0219i pentru testare manual\u0103. Este \u00eempachetat \u00eentr-un container Linux Docker \u0219i este g\u0103zduit sub gestionarea Amazon ECS. Este prev\u0103zut cu autoscalare \u00een cazul unui volum mare de loguri.<\/li>\n<li> Din KDS, datele sunt direc\u021bionate cu furtunuri de pompieri c\u0103tre Amazon Redshift cu depozite intermediare \u00een Amazon S3.<\/li>\n<li> Loguri opera\u021bionale pentru dezvoltatori (informa\u021bii de depanare, mesaje de eroare etc.) sunt formate \u00een JSON pl\u0103cut ochiului \u0219i trimise \u00een Amazon CloudWatch Logs.<\/li>\n<\/ul>\n<p>\n<img decoding=\"async\" alt=\"Despre topoare \u0219i varz\u0103\" src=\"\/wp-content\/uploads\/2019\/05\/571e5f1a22903a09d634dcda81487ab4.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nLucr\u00e2nd cu un astfel de zoo de servicii AWS, vrei s\u0103 \u0219tii ce ai la dispozi\u021bie \u0219i cum s\u0103 utilizezi mai bine fiecare lucru.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nImagina\u021bi-v\u0103 \u2013 ave\u021bi un vechi \u0219i de \u00eencredere topor, care taie bine copacii \u0219i bate cuiele destul de bine. A\u0219adar, de-a lungul anilor de lucru, a\u021bi \u00eenv\u0103\u021bat s\u0103-l folosi\u021bi bine, a\u021bi construit o cu\u0219c\u0103 pentru c\u00e2ini, c\u00e2teva anexe \u0219i poate chiar o c\u0103su\u021b\u0103. Uneori apar dificult\u0103\u021bi, de exemplu, a r\u0103suci un \u0219urub cu un topor nu este \u00eentotdeauna rapid, dar de obicei se rezolv\u0103 cu un pic de r\u0103bdare \u0219i a\u0219a mai departe. <\/p>\n<p>\u0218i aici apare vecinul \u00eenst\u0103rit, care are o mul\u021bime de unelte diferite: fer\u0103str\u0103u electric, ma\u0219ini de g\u0103urit, \u0219urubelni\u021be \u0219i Dumnezeu \u0219tie ce altceva. Toat\u0103 aceast\u0103 bog\u0103\u021bie este disponibil\u0103 pentru \u00eenchiriere non-stop. Ce este de f\u0103cut? Varianta de a lua o secure \u0219i a-i lua bunurile o respingem ca fiind politic\u0103 incompetent\u0103. Cel mai ra\u021bional ar fi s\u0103 studiem ce unelte sunt acolo, cum se pot completa reciproc \u00een diferitele activit\u0103\u021bi \u0219i \u00een ce condi\u021bii sunt \u00eenchiriate.<\/p>\n<p>Deoarece pentru mine acest motiv a fost principalul, preg\u0103tirea a fost construit\u0103 \u00een consecin\u021b\u0103 \u2013 s\u0103 g\u0103sesc un ghid fundamental \u0219i s\u0103-l studiez cu aten\u021bie. \u0218i un astfel de ghid <noindex><a rel=\"nofollow\" href=\"https:\/\/www.amazon.com\/Certified-Solutions-Architect-Study-Guide\/dp\/111950421X\/ref=dp_ob_title_bk\">a fost g\u0103sit<\/a><\/noindex>. Cartea este scris\u0103 destul de sec, dar cu greu aceasta \u00eei va alunga pe cei care au \u00eenv\u0103\u021bat analiza matematic\u0103 cu Fichtenholtz.<\/p>\n<p>Am citit-o de la un cap\u0103t la altul \u0219i consider c\u0103 scopul propus este pe deplin \u00eendeplinit \u2013 ofer\u0103 o bun\u0103 prezentare at\u00e2t a serviciilor, c\u00e2t \u0219i a conceptelor mai generale care pot ap\u0103rea la examen. \u00cen plus, un bonus pl\u0103cut este posibilitatea de a parcurge o procedur\u0103 ceva mai ciudat\u0103 de \u00eenregistrare pe Sybex \u0219i de a r\u0103spunde la toate \u00eentreb\u0103rile de verificare \u0219i examenele simulate din carte online.<\/p>\n<p><i>Un aspect important: m-am preg\u0103tit folosind cartea din 2016, dar \u00een AWS totul se schimb\u0103 destul de dinamic, a\u0219a c\u0103 c\u0103uta\u021bi cea mai recent\u0103 edi\u021bie care va fi disponibil\u0103 \u00een momentul preg\u0103tirii. De exemplu, \u00eentreb\u0103rile din testele simulate includ adesea \u00eentreb\u0103ri despre disponibilitate \u0219i durabilitate a diferitelor clase S3 \u0219i Glacier, dar unele dintre valori s-au schimbat \u00een compara\u021bie cu 2016. \u00cen plus, au fost ad\u0103ugate altele noi (de exemplu, INTELLIGENT_TIERING sau ONEZONE_IA).<\/i><\/p>\n<p><b>Motivul doi: \u201e65 de nuan\u021be de portocaliu\u201d<\/b><\/p>\n<p>G\u00e2ndirea tensionat\u0103 necesit\u0103 un anumit efort. Dar nu este un secret c\u0103 mul\u021bi programatori experimenteaz\u0103 o pl\u0103cere masochist\u0103 din rezolvarea de puzzle-uri, \u00eentreb\u0103ri \u0219i, uneori, chiar examene.<\/p>\n<p>Cred c\u0103 aceast\u0103 pl\u0103cere este \u00een mare m\u0103sur\u0103 similar\u0103 cu jocul \u201eCe? Unde? C\u00e2nd?\u201d sau, s\u0103 zicem, o partid\u0103 bun\u0103 de \u0219ah.<\/p>\n<p>\u00cen acest sens, examenul actual AWS Solutions Architect Associate este foarte bun. De\u0219i, \u00een timpul preg\u0103tirii, printre \u00eentreb\u0103rile de verificare au ap\u0103rut din c\u00e2nd \u00een c\u00e2nd \u00eentreb\u0103ri \u201ede memorat\u201d, de tipul \u201e<i>C\u00e2te adrese IP elastice se pot avea maxim \u00een VPC<\/i>\u201d sau \u201e<i>Care este disponibilitatea S3 IA?<\/i>\u00bb, la examenul propriu-zis nu au ap\u0103rut astfel de \u00eentreb\u0103ri. Practic, fiecare dintre cele 65 de \u00eentreb\u0103ri era o mini-problem\u0103 de proiectare. Iat\u0103 un exemplu destul de tipic din documenta\u021bia oficial\u0103:<\/p>\n<blockquote><p>O aplica\u021bie web permite clien\u021bilor s\u0103 \u00eencarce comenzi \u00eentr-un bucket S3. Evenimentele Amazon S3 rezultate declan\u0219eaz\u0103 o func\u021bie Lambda care introduce un mesaj \u00eentr-o coad\u0103 SQS. O singur\u0103 instan\u021b\u0103 EC2 citeste mesajele din coad\u0103, le proceseaz\u0103 \u0219i le stocheaz\u0103 \u00eentr-un tabel DynamoDB partitionat dup\u0103 ID-ul unic al comenzii. Se a\u0219teapt\u0103 ca traficul din luna urm\u0103toare s\u0103 creasc\u0103 de 10 ori \u0219i un Arhitect de Solu\u021bii evalueaz\u0103 arhitectura pentru posibile probleme de scalare. Care component\u0103 este CEL MAI probabil s\u0103 necesite reproiectare pentru a putea scala pentru a acomoda noul trafic?<br \/>\nA. Func\u021bia Lambda B. Coada SQS C. Instan\u021ba EC2 D. Tabelul DynamoDB <\/p><\/blockquote>\n<p>\nDin c\u00e2te \u0219tiu, varianta anterioar\u0103 a examenului con\u021binea 55 de \u00eentreb\u0103ri \u0219i se acordau 80 de minute. Se pare c\u0103 s-a lucrat bine la ea: acum sunt 65 de \u00eentreb\u0103ri \u0219i 130 de minute pentru acestea. Timpul pe \u00eentrebare a crescut, dar practic nu sunt \u00eentreb\u0103ri de trecere. La fiecare trebuia s\u0103 m\u0103 g\u00e2ndesc, uneori \u0219i mai mult de dou\u0103 minute.<\/p>\n<p>Apropo, de aici se poate trasa o concluzie practic\u0103. De obicei, tactica c\u00e2\u0219tig\u0103toare este s\u0103 parcurgi rapid toate \u00eentreb\u0103rile \u0219i s\u0103 r\u0103spunzi la ceea ce \u0219tii imediat. \u00cen cazul SAA-C01, acest lucru \u00een general nu func\u021bioneaz\u0103, va trebui s\u0103 marchezi practic fiecare \u00eentrebare, altfel exist\u0103 riscul s\u0103 nu observi un detaliu \u0219i s\u0103 r\u0103spunzi gre\u0219it. \u00cen final, am r\u0103spuns, aloc\u00e2nd o minut\u0103 sau dou\u0103 pentru fiecare \u00eentrebare, apoi m-am \u00eentors la cele marcate \u0219i am cheltuit pe ele ultimele 20 de minute.<\/p>\n<p><b>Motivul trei: \u201eDac\u0103 tinere\u021bea ar \u0219ti, dac\u0103 b\u0103tr\u00e2ne\u021bea ar putea\u201d<\/b><\/p>\n<p>Dup\u0103 cum se \u0219tie, una dintre cele mai frecvente cauze de respingere pe care le primesc programatorii de peste 40 de ani este capacitatea de \u00eenv\u0103\u021bare redus\u0103 \u00een compara\u021bie cu tinerii.<\/p>\n<p>\u00cen acela\u0219i timp, exist\u0103 o senza\u021bie c\u0103 \u00een anumite domenii capacitatea mea de a \u00eenv\u0103\u021ba chiar a crescut \u00een compara\u021bie cu anii de studen\u021bie \u2013 datorit\u0103 unei mai mari persisten\u021be \u0219i a experien\u021bei, care permite atragerea de analogii cunoscute pentru \u00eentreb\u0103ri mai pu\u021bin cunoscute.<\/p>\n<p>Dar senza\u021bia poate fi \u00een\u0219el\u0103toare, este nevoie de un criteriu obiectiv. S\u0103 m\u0103 preg\u0103tesc pentru examen \u0219i s\u0103-l sus\u021bin \u2013 ce nu ar fi asta?<\/p>\n<p>Consider c\u0103 sesiunea de testare a avut succes. M-am preg\u0103tit singur \u0219i preg\u0103tirea a decurs destul de lin. Da, de c\u00e2teva ori am adormit \u00een hamac citind manualul - dar a\u0219a ceva se poate \u00eent\u00e2mpla oricui.<br \/>\nAcum am un certificat \u0219i punctaj decent pentru examen ca semn al preg\u0103tirii.<br \/>\n\u2003<br \/>\n\u0218i pu\u021bin despre ce ar putea fi motiva\u021bia, dar \u00een cazul meu, cu greu a fost.<\/p>\n<p><b>Nu este prima motiva\u021bie: \u201eBanii\u201d<\/b><\/p>\n<p>Exist\u0103 studii interesante <noindex><a rel=\"nofollow\" href=\"https:\/\/www.forbes.com\/sites\/louiscolumbus\/2019\/02\/11\/15-top-paying-it-certifications-in-2019\">de la \u201eForbes\u201d<\/a><\/noindex> despre care speciali\u0219ti cu anumite certific\u0103ri sunt cei mai bine pl\u0103ti\u021bi din lume, iar AWS SAA se afl\u0103 pe un onorabil loc 4<\/p>\n<p><img decoding=\"async\" alt=\"Despre topoare \u0219i varz\u0103\" src=\"\/wp-content\/uploads\/2019\/05\/c0c00f36225702a7c7000b9afba9d1d8.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDar, pe de o parte, care este cauza \u0219i care este efectul? B\u0103nuiesc c\u0103 tipii c\u00e2\u0219tig\u0103 bine <br \/>\ndatorit\u0103 anumitor abilit\u0103\u021bi, iar aceste abilit\u0103\u021bi \u00eei ajut\u0103 \u0219i s\u0103 ob\u021bin\u0103 certificarea. Pe de alt\u0103 parte, m\u0103 fr\u0103m\u00e2nt\u0103 \u00eendoieli c\u0103 cineva ar fi pl\u0103tit $130 K pe an \u00een afara Statelor Unite, chiar dac\u0103 s-ar certifica din cap p\u00e2n\u0103 \u00een picioare.<\/p>\n<p>\u0218i, \u00een general, cum se \u0219tie, dup\u0103 satisfacerea nivelurilor inferioare ale piramidei, salariul \u00eenceteaz\u0103 s\u0103 mai fie principalul factor.<\/p>\n<p><b>Nu este a doua motiva\u021bie: \u201eCerin\u021bele companiei\u201d<\/b><\/p>\n<p>Companiile pot \u00eencuraja certific\u0103rile sau chiar le pot solicita (mai ales dac\u0103 sunt necesare pentru parteneriate, de exemplu, pentru intrarea \u00een AWS APN \u00een cazul Amazon). <\/p>\n<p>Dar, \u00een cazul nostru, se creeaz\u0103 un produs independent, iar noi \u00eencerc\u0103m s\u0103 evit\u0103m blocajul vendor. A\u0219a c\u0103 nimeni nu cere certific\u0103ri. Vor aprecia \u0219i vor pl\u0103ti examenul ca recunoa\u0219tere a anumitelor eforturi \u2013 iat\u0103 toat\u0103 formalitatea.<\/p>\n<p><b>Nu este a treia motiva\u021bie: \u201eAngajarea\u201d<\/b><\/p>\n<p>Poate c\u0103 de\u021binerea certific\u0103rilor va fi un anumit avantaj pentru ob\u021binerea unui loc de munc\u0103, \u00een condi\u021bii egale. Dar eu nu am planuri s\u0103-mi schimb locul de munc\u0103. \u00cemi face pl\u0103cere s\u0103 lucrez la un produs complex, care folose\u0219te activ multe abord\u0103ri la mod\u0103 \u0219i servicii AWS. Am destul de multe din toate acestea \u0219i la actualul loc de munc\u0103.<\/p>\n<p>Nu, desigur, sunt cazuri diferite: \u00een cei 23 de ani \u00een IT am schimbat locul de munc\u0103 de 5 ori. Nu este exclus c\u0103 va trebui s\u0103 schimb din nou, dac\u0103 voi mai rezista \u00eenc\u0103 20 de ani. Dar dac\u0103 ne vor lovi \u2013 vom pl\u00e2nge.<\/p>\n<p><b>Util<\/b><\/p>\n<p>\u00cen concluzie, a\u0219 men\u021biona c\u00e2teva materiale pe care le-am folosit \u00een procesul de preg\u0103tire pentru examen \u0219i, pur \u0219i simplu, ca \u201eun ascu\u021bitor pentru fer\u0103straie\u201d:<\/p>\n<ul>\n<li> Cursuri video <noindex>pluralsight <\/noindex>\u0219i <noindex><a rel=\"nofollow\" href=\"https:\/\/acloud.guru\/\">cloud guru<\/a><\/noindex>. Ultimele, se spune, sunt deosebit de bune dac\u0103 se cump\u0103r\u0103 un abonament cu acces la toate examenele de prob\u0103. Dar eu aveam ca unul dintre condi\u021biile jocului s\u0103 nu cheltuiesc niciun ban pe preg\u0103tire, iar cump\u0103rarea abonamentului se potrivea prost cu acest lucru. \u00cen plus, consider c\u0103 formatul video este, \u00een general, mai pu\u021bin dens \u00een ceea ce prive\u0219te volumul de informa\u021bii pe unitate de timp. Cu toate acestea, c\u00e2nd m\u0103 voi preg\u0103ti pentru SA Professional, cel mai probabil voi activa un abonament.<\/li>\n<li> Tone de documenta\u021bie oficial\u0103 Amazon, inclusiv FAQ \u0219i White Papers.<\/li>\n<li> \u0218i ultima, dar semnificativ\u0103 idee \u2013 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.amazon.com\/s?k=9781119558439&amp;i=stripbooks&amp;linkCode=qs\">teste de verificare<\/a><\/noindex>. Le-am g\u0103sit cu c\u00e2teva zile \u00eenainte de examen \u0219i m-am antrenat bine. Nu este nimic de citit acolo, dar interfa\u021ba online \u0219i comentariile la r\u0103spunsuri sunt excelente. <\/li>\n<\/ul>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/453390\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0437\u043c\u044b\u0448\u043b\u0435\u043d\u0438\u044f \u043e \u0442\u043e\u043c, \u043e\u0442\u043a\u0443\u0434\u0430 \u0431\u0435\u0440\u0435\u0442\u0441\u044f \u0436\u0435\u043b\u0430\u043d\u0438\u0435 \u0441\u0434\u0430\u0442\u044c \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044e AWS Solutions Architect Associate. \u041c\u043e\u0442\u0438\u0432 \u043f\u0435\u0440\u0432\u044b\u0439: \u00ab\u0422\u043e\u043f\u043e\u0440\u044b\u00bb \u041e\u0434\u0438\u043d \u0438\u0437 \u0441\u0430\u043c\u044b\u0445 \u043f\u043e\u043b\u0435\u0437\u043d\u044b\u0445 \u0434\u043b\u044f \u043b\u044e\u0431\u043e\u0433\u043e \u043f\u0440\u043e\u0444\u0435\u0441\u0441\u0438\u043e\u043d\u0430\u043b\u0430 \u043f\u0440\u0438\u043d\u0446\u0438\u043f\u043e\u0432 \u00ab\u0417\u043d\u0430\u0439 \u0441\u0432\u043e\u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u044b\u00bb (\u0438\u043b\u0438 \u0432 \u043e\u0434\u043d\u043e\u0439 \u0438\u0437 \u0432\u0430\u0440\u0438\u0430\u0446\u0438\u0439 \u00ab\u0442\u043e\u0447\u0438 \u043f\u0438\u043b\u0443\u00bb). \u041c\u044b \u0432 \u043e\u0431\u043b\u0430\u043a\u0430\u0445 \u0443\u0436\u0435 \u0434\u0430\u0432\u043d\u043e, \u043d\u043e \u0434\u043e \u043f\u043e\u0440\u044b \u0434\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u044d\u0442\u043e \u0431\u044b\u043b\u0438 \u043f\u0440\u043e\u0441\u0442\u043e \u043c\u043e\u043d\u043e\u043b\u0438\u0442\u043d\u044b\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u0441 \u0431\u0430\u0437\u0430\u043c\u0438, \u0440\u0430\u0437\u0432\u0435\u0440\u043d\u0443\u0442\u044b\u0435 \u043d\u0430 \u0438\u043d\u0441\u0442\u0430\u043d\u0441\u0430\u0445 EC2 \u2014 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25974,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-34468","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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