{"id":34083,"date":"2019-10-31T21:56:19","date_gmt":"2019-10-31T18:56:19","guid":{"rendered":"https:\/\/prohoster.info\/blog\/kto-takie-data-inzhenery-i-kak-imi-stanovyatsya\/"},"modified":"2019-10-31T21:56:19","modified_gmt":"2019-10-31T18:56:19","slug":"kto-takie-data-inzhenery-i-kak-imi-stanovyatsya","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/kto-takie-data-inzhenery-i-kak-imi-stanovyatsya","title":{"rendered":"Kdo jsou datov\u00ed in\u017een\u00fd\u0159i a jak se jimi st\u00e1t?","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ahoj znovu! Titulek \u010dl\u00e1nku hovo\u0159\u00ed s\u00e1m za sebe. V p\u0159edve\u010der spu\u0161t\u011bn\u00ed kurzu <noindex><a rel=\"nofollow\" href=\"https:\/\/otus.pw\/a4Uj\/\">\u201eDatov\u00fd in\u017een\u00fdr\u201c<\/a><\/noindex> se pod\u00edv\u00e1me na to, kdo vlastn\u011b datov\u00ed in\u017een\u00fd\u0159i jsou. V \u010dl\u00e1nku je spousta u\u017eite\u010dn\u00fdch odkaz\u016f. P\u0159\u00edjemn\u00e9 \u010dten\u00ed.<\/p>\n<p><img decoding=\"async\" alt=\"Kdo jsou datov\u00ed in\u017een\u00fd\u0159i a jak se jimi st\u00e1t?\" src=\"\/wp-content\/uploads\/2019\/05\/5f831df35ab1292adafca20f937ed22d.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<i>Jednoduch\u00fd pr\u016fvodce, jak zachytit vlnu datov\u00e9ho in\u017een\u00fdrstv\u00ed a nenechat se vt\u00e1hnout do hlubin.<\/i><\/p>\n<p>M\u00e1m dojem, \u017ee dnes chce ka\u017ed\u00fd b\u00fdt datov\u00fdm v\u011bdcem (Data Scientist). Ale co datov\u00e9 in\u017een\u00fdrstv\u00ed? <i>V podstat\u011b je to jak\u00fdsi hybrid mezi datov\u00fdm analytikem a datov\u00fdm v\u011bdcem; datov\u00fd in\u017een\u00fdr obvykle odpov\u00edd\u00e1 za spr\u00e1vu pracovn\u00edch tok\u016f, zpracovatelsk\u00fdch konvej\u016f a ETL proces\u016f.<\/i>Vzhledem k d\u016fle\u017eitosti t\u011bchto funkc\u00ed je to v sou\u010dasnosti dal\u0161\u00ed popul\u00e1rn\u00ed profesion\u00e1ln\u00ed \u017eargon, kter\u00fd aktivn\u011b nab\u00edr\u00e1 na obr\u00e1tk\u00e1ch.<\/p>\n<p>Vysok\u00fd plat a obrovsk\u00fd z\u00e1jem \u2013 to je jen mal\u00e1 \u010d\u00e1st toho, co tuto pr\u00e1ci \u010din\u00ed nesm\u00edrn\u011b atraktivn\u00ed! Pokud chcete p\u0159idat sv\u00e9 jm\u00e9no mezi hrdiny, nikdy nen\u00ed pozd\u011b za\u010d\u00edt se u\u010dit. V tomto p\u0159\u00edsp\u011bvku jsem shrom\u00e1\u017edil v\u0161echny pot\u0159ebn\u00e9 informace, abych v\u00e1m pomohl ud\u011blat prvn\u00ed kroky.<\/p>\n<p>Tak poj\u010fme za\u010d\u00edt!<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p><b>Co je datov\u00e9 in\u017een\u00fdrstv\u00ed?<\/b><\/p>\n<p>Up\u0159\u00edmn\u011b \u0159e\u010deno, nen\u00ed lep\u0161\u00edho vysv\u011btlen\u00ed, ne\u017e toto:<\/p>\n<blockquote><p><i>\u201eV\u011bdec m\u016f\u017ee objevit novou hv\u011bzdu, ale nem\u016f\u017ee ji vytvo\u0159it. Bude muset po\u017e\u00e1dat in\u017een\u00fdra, aby to ud\u011blal za n\u011bj.\u201c<\/i><\/p>\n<p>\u2013Gordon Lindsay Glegg<\/p><\/blockquote>\n<p>T\u00edm p\u00e1dem je role datov\u00e9ho in\u017een\u00fdra dost d\u016fle\u017eit\u00e1.<\/p>\n<p>Z n\u00e1zvu vypl\u00fdv\u00e1, \u017ee in\u017een\u00fdrstv\u00ed dat souvis\u00ed s daty, konkr\u00e9tn\u011b s jejich doru\u010dov\u00e1n\u00edm, ukl\u00e1d\u00e1n\u00edm a zpracov\u00e1n\u00edm. Hlavn\u00edm \u00fakolem in\u017een\u00fdr\u016f je tedy zajistit spolehlivou infrastrukturu pro data. Pokud se pod\u00edv\u00e1me na hierarchii pot\u0159eb AI, in\u017een\u00fdrstv\u00ed dat zauj\u00edm\u00e1 prvn\u00ed 2-3 f\u00e1ze: <b>sb\u011br, p\u0159esun a ukl\u00e1d\u00e1n\u00ed, p\u0159\u00edprava dat<\/b>.<\/p>\n<p><img decoding=\"async\" alt=\"Kdo jsou datov\u00ed in\u017een\u00fd\u0159i a jak se jimi st\u00e1t?\" src=\"\/wp-content\/uploads\/2019\/05\/377481f2f52a4ed771508a450678afd0.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>\u010c\u00edm se datov\u00fd in\u017een\u00fdr zab\u00fdv\u00e1?<\/b><\/p>\n<p>Se vznikem velk\u00fdch dat se oblast odpov\u011bdnosti radik\u00e1ln\u011b zm\u011bnila. Zat\u00edmco d\u0159\u00edve tito experti psali velk\u00e9 SQL dotazy a p\u0159ev\u00e1d\u011bli data pomoc\u00ed n\u00e1stroj\u016f, jako jsou Informatica ETL, Pentaho ETL, Talend, nyn\u00ed se po\u017eadavky na datov\u00e9 in\u017een\u00fdry zv\u00fd\u0161ily.<\/p>\n<p>V\u011bt\u0161ina spole\u010dnost\u00ed s voln\u00fdmi pozicemi na pozici datov\u00e9ho in\u017een\u00fdra uv\u00e1d\u00ed n\u00e1sleduj\u00edc\u00ed po\u017eadavky:<\/p>\n<ul>\n<li>Vynikaj\u00edc\u00ed znalost SQL a Pythonu.<\/li>\n<li>Zku\u0161enosti s cloudov\u00fdmi platformami, zejm\u00e9na Amazon Web Services.<\/li>\n<li>Preferov\u00e1na je znalost Java\/Scala.<\/li>\n<li>Dobr\u00e9 porozum\u011bn\u00ed datab\u00e1z\u00edm SQL a NoSQL (modelov\u00e1n\u00ed dat, ukl\u00e1d\u00e1n\u00ed dat).<\/li>\n<\/ul>\n<p>M\u011bjte na pam\u011bti, \u017ee tohle je jen to nejnutn\u011bj\u0161\u00ed. Z tohoto seznamu lze p\u0159edpokl\u00e1dat, \u017ee datov\u00ed in\u017een\u00fd\u0159i jsou specialist\u00e9 v oblasti v\u00fdvoje softwaru a backendu.<br \/>\nNap\u0159\u00edklad pokud spole\u010dnost za\u010dne generovat velk\u00e9 objemy dat z r\u016fzn\u00fdch zdroj\u016f, va\u0161\u00edm \u00fakolem jako datov\u00e9ho in\u017een\u00fdra je organizovat sb\u011br informac\u00ed, jejich zpracov\u00e1n\u00ed a ukl\u00e1d\u00e1n\u00ed.<\/p>\n<p>Seznam n\u00e1stroj\u016f pou\u017e\u00edvan\u00fdch v tomto p\u0159\u00edpad\u011b se m\u016f\u017ee li\u0161it, v\u0161e z\u00e1vis\u00ed na objemu t\u011bchto dat, rychlosti jejich p\u0159\u00edjmu a r\u016fznosti. V\u011bt\u0161ina spole\u010dnost\u00ed se v podstat\u011b nesetk\u00e1v\u00e1 s velk\u00fdmi daty, tak\u017ee jako centralizovan\u00e9 \u00falo\u017ei\u0161t\u011b, naz\u00fdvan\u00e9 datov\u00e9 skladi\u0161t\u011b, lze pou\u017e\u00edt SQL datab\u00e1zi (PostgreSQL, MySQL atd.) se sadou skript\u016f, kter\u00e9 sm\u011bruj\u00ed data do \u00falo\u017ei\u0161t\u011b.<\/p>\n<p>IT giganti jako Google, Amazon, Facebook nebo Dropbox maj\u00ed vy\u0161\u0161\u00ed po\u017eadavky: znalost Pythonu, Javy nebo Scaly.<\/p>\n<ul>\n<li>Zku\u0161enosti s velk\u00fdmi daty: Hadoop, Spark, Kafka.<\/li>\n<li>Znalost algoritm\u016f a datov\u00fdch struktur.<\/li>\n<li>Porozum\u011bn\u00ed z\u00e1klad\u016fm distribuovan\u00fdch syst\u00e9m\u016f.<\/li>\n<li>Zku\u0161enosti s n\u00e1stroji pro vizualizaci dat, jako jsou Tableau nebo ElasticSearch, budou velk\u00fdm plusem.<\/li>\n<\/ul>\n<p>To znamen\u00e1, \u017ee je patrn\u00fd jasn\u00fd posun sm\u011brem k velk\u00fdm dat\u016fm, zejm\u00e9na v jejich zpracov\u00e1n\u00ed p\u0159i vysok\u00fdch z\u00e1t\u011b\u017e\u00edch. Tyto spole\u010dnosti maj\u00ed zv\u00fd\u0161en\u00e9 po\u017eadavky na odolnost syst\u00e9mu.<\/p>\n<p><b>Datov\u00ed in\u017een\u00fd\u0159i vs. datov\u00ed v\u011bdci<\/b><\/p>\n<p><img decoding=\"async\" alt=\"Kdo jsou datov\u00ed in\u017een\u00fd\u0159i a jak se jimi st\u00e1t?\" src=\"\/wp-content\/uploads\/2019\/05\/f01dd66863fcc0a89ab0b763d208a863.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Dob\u0159e, to bylo jednoduch\u00e9 a z\u00e1bavn\u00e9 srovn\u00e1n\u00ed (nic osobn\u00edho), ale ve skute\u010dnosti je to mnohem slo\u017eit\u011bj\u0161\u00ed.<\/i><\/p>\n<p>Za prv\u00e9, mus\u00edte v\u011bd\u011bt, \u017ee existuje pom\u011brn\u011b mnoho nejasnost\u00ed v rozd\u011blen\u00ed rol\u00ed a dovednost\u00ed datov\u00e9ho v\u011bdce a datov\u00e9ho in\u017een\u00fdra. To znamen\u00e1, \u017ee v\u00e1s m\u016f\u017ee snadno zm\u00e1st to, jak\u00e9 dovednosti jsou skute\u010dn\u011b pot\u0159ebn\u00e9 pro \u00fasp\u011b\u0161n\u00e9ho datov\u00e9ho in\u017een\u00fdra. Samoz\u0159ejm\u011b existuj\u00ed ur\u010dit\u00e9 dovednosti, kter\u00e9 se p\u0159ekr\u00fdvaj\u00ed mezi ob\u011bma rolemi. Ale tak\u00e9 existuje cel\u00e1 \u0159ada diametr\u00e1ln\u011b opa\u010dn\u00fdch dovednost\u00ed.<\/p>\n<p>Datov\u00e1 v\u011bda je v\u00e1\u017en\u00e1 v\u011bc, ale sm\u011b\u0159ujeme k sv\u011btu funk\u010dn\u00ed datov\u00e9 v\u011bdy, kde jsou praktikuj\u00edc\u00ed schopni prov\u00e1d\u011bt vlastn\u00ed anal\u00fdzu. Aby bylo mo\u017en\u00e9 vyu\u017e\u00edt datov\u00e9 kan\u00e1ly a integrovan\u00e9 datov\u00e9 struktury, pot\u0159ebujete datov\u00e9 in\u017een\u00fdry, nikoli v\u011bdce.<\/p>\n<p><b>Je datum engineer \u017e\u00e1dan\u011bj\u0161\u00ed ne\u017e datov\u00fd v\u011bdec?<\/b><\/p>\n<blockquote><p><i> \u2014 Ano, proto\u017ee ne\u017e m\u016f\u017eete p\u0159ipravit mrkvov\u00fd kol\u00e1\u010d, mus\u00edte nejprve nasb\u00edrat, oloupat a z\u00e1sobit mrkev!<\/i><\/p><\/blockquote>\n<p>Datum engineer rozum\u00ed programov\u00e1n\u00ed l\u00e9pe ne\u017e jak\u00fdkoli datov\u00fd v\u011bdec, ale co se statistik t\u00fd\u010de, je v\u0161echno naopak.<\/p>\n<p>Ale tady je v\u00fdhoda datov\u00e9ho in\u017een\u00fdra:<\/p>\n<p>bez n\u011bj\/n\u00ed hodnotu modelu prototypu, kter\u00fd se v\u011bt\u0161inou skl\u00e1d\u00e1 z \u00fatr\u017eku k\u00f3du hrozn\u00e9 kvality v souboru Python, z\u00edskan\u00e9ho od datov\u00e9ho v\u011bdce a somehow poskytuj\u00edc\u00edho v\u00fdsledek, sm\u011b\u0159uje k nule.<\/p>\n<p>Bez datov\u00e9ho in\u017een\u00fdra se tento k\u00f3d nikdy nestane projektem a \u017e\u00e1dn\u00fd podnikov\u00fd probl\u00e9m nebude efektivn\u011b vy\u0159e\u0161en. Datov\u00fd in\u017een\u00fdr se sna\u017e\u00ed to v\u0161echno p\u0159etvo\u0159it na produkt.<\/p>\n<p><b>Z\u00e1kladn\u00ed znalosti, kter\u00e9 by m\u011bl datov\u00fd in\u017een\u00fdr ovl\u00e1dat<\/b><\/p>\n<p><img decoding=\"async\" alt=\"Kdo jsou datov\u00ed in\u017een\u00fd\u0159i a jak se jimi st\u00e1t?\" src=\"\/wp-content\/uploads\/2019\/05\/f724004e5a30a0c021c4377d66985d16.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPokud v\u00e1s tato pr\u00e1ce vzru\u0161uje a jste pln\u00ed nad\u0161en\u00ed \u2014 m\u00e1te schopnosti se to nau\u010dit, m\u016f\u017eete zvl\u00e1dnout v\u0161echny nezbytn\u00e9 dovednosti a st\u00e1t se skute\u010dnou rockovou hv\u011bzdou v oblasti v\u00fdvoje dat. A ano, m\u016f\u017eete to dos\u00e1hnout i bez programovac\u00edch dovednost\u00ed nebo jak\u00fdchkoli jin\u00fdch technick\u00fdch znalost\u00ed. Je to obt\u00ed\u017en\u00e9, ale mo\u017en\u00e9!<\/p>\n<p><b>Jak\u00e9 jsou prvn\u00ed kroky?<\/b><\/p>\n<blockquote><p><i>Mus\u00edte m\u00edt obecnou p\u0159edstavu o tom, jak to funguje.<\/i><\/p><\/blockquote>\n<p>P\u0159edev\u0161\u00edm, datov\u00e9 in\u017een\u00fdrstv\u00ed se vztahuje na informatiku. Konkr\u00e9tn\u011b \u2014 mus\u00edte rozum\u011bt efektivn\u00edm algoritm\u016fm a datov\u00fdm struktur\u00e1m. Za druh\u00e9, proto\u017ee datov\u00ed in\u017een\u00fd\u0159i pracuj\u00ed s daty, je nezbytn\u00e9 ch\u00e1pat principy fungov\u00e1n\u00ed datab\u00e1z\u00ed a struktur, na kter\u00fdch jsou zalo\u017een\u00e9.<\/p>\n<p>Nap\u0159\u00edklad b\u011b\u017en\u00e9 B-tree SQL datab\u00e1ze jsou zalo\u017eeny na datov\u00e9 struktu\u0159e B-tree, a tak\u00e9 v modern\u00edch distribuovan\u00fdch repozit\u00e1\u0159\u00edch, LSM-tree a dal\u0161\u00edch modifikac\u00edch hash tabulek.<\/p>\n<p><i>* Tyto kroky jsou zalo\u017eeny na skv\u011bl\u00e9m \u010dl\u00e1nku <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/@adil_45422\">Adila Chashtamova<\/a><\/noindex>. Tak\u017ee pokud zn\u00e1te ru\u0161tinu, podpo\u0159te tohoto autora a p\u0159e\u010dt\u011bte si <noindex><a rel=\"nofollow\" href=\"https:\/\/khashtamov.com\/ru\/data-engineer\/\">jeho p\u0159\u00edsp\u011bvek<\/a><\/noindex>.<\/i><\/p>\n<p><b>1. Algoritmy a datov\u00e9 struktury<\/b><\/p>\n<p>Pou\u017eit\u00ed spr\u00e1vn\u00e9 datov\u00e9 struktury m\u016f\u017ee v\u00fdznamn\u011b zlep\u0161it v\u00fdkon algoritmu. Ide\u00e1ln\u011b bychom se m\u011bli v\u0161ichni u\u010dit datov\u00e9 struktury a algoritmy ve \u0161kol\u00e1ch, ale to se z\u0159\u00eddka kdy prob\u00edr\u00e1. V ka\u017ed\u00e9m p\u0159\u00edpad\u011b, nikdy nen\u00ed pozd\u011b se sezn\u00e1mit.<br \/>\nTak\u017ee tady jsou m\u00e9 obl\u00edben\u00e9 bezplatn\u00e9 kurzy pro studium datov\u00fdch struktur a algoritm\u016f:<\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/www.udemy.com\/introduction-to-data-structures\/?ranMID=39197&amp;ranEAID=JVFxdTr9V80&amp;ranSiteID=JVFxdTr9V80-fcVI3mDcwPC4Q5dpzDABSg&amp;LSNPUBID=JVFxdTr9V80\">Od jednoduch\u00fdch k slo\u017eit\u00fdm: Datov\u00e9 struktury (Udemy)<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/www.coursera.org\/learn\/algorithms-part1?ranMID=40328&amp;ranEAID=JVFxdTr9V80&amp;ranSiteID=JVFxdTr9V80-Y2SOzvEQ5UCqGZ8SQ8yPFA&amp;siteID=JVFxdTr9V80-Y2SOzvEQ5UCqGZ8SQ8yPFA&amp;utm_content=10&amp;utm_medium=partners&amp;utm_source=linkshare&amp;utm_campaign=JVFxdTr9V80\">Algoritmy, \u010c\u00e1st I (Coursera)<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/www.coursera.org\/learn\/algorithms-part2?ranMID=40328&amp;ranEAID=JVFxdTr9V80&amp;ranSiteID=JVFxdTr9V80-sXWvgPKRyzYEBJ33lVooUQ&amp;siteID=JVFxdTr9V80-sXWvgPKRyzYEBJ33lVooUQ&amp;utm_content=10&amp;utm_medium=partners&amp;utm_source=linkshare&amp;utm_campaign=JVFxdTr9V80\">Algoritmy, \u010c\u00e1st II (Coursera)<\/a><\/noindex>\n <\/li>\n<\/ul>\n<p>A nezapome\u0148te na klasick\u00e9 d\u00edlo o algoritmech od Thomase Cormena \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.amazon.com\/gp\/product\/0262033844\/ref=as_li_tl?ie=UTF8&amp;camp=1789&amp;creative=9325&amp;creativeASIN=0262033844&amp;linkCode=as2&amp;tag=adilkhash-20&amp;linkId=74742875db503b1a899ca35159749067\">\u00davod do algoritm\u016f<\/a><\/noindex>. To je ide\u00e1ln\u00ed p\u0159\u00edru\u010dka, kdy\u017e pot\u0159ebujete osv\u011b\u017eit svou pam\u011b\u0165.<\/p>\n<ul>\n<li>Abyste zlep\u0161ili sv\u00e9 dovednosti, pou\u017e\u00edvejte <noindex><a rel=\"nofollow\" href=\"https:\/\/leetcode.com\/problemset\/algorithms\/\">Leetcode<\/a><\/noindex>.<\/li>\n<\/ul>\n<p>M\u016f\u017eete se tak\u00e9 pono\u0159it do sv\u011bta datab\u00e1z\u00ed pomoc\u00ed \u00fa\u017easn\u00fdch vide\u00ed z Carnegie Mellon University na Youtube:<\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/www.youtube.com\/playlist?list=PLSE8ODhjZXjYutVzTeAds8xUt1rcmyT7x\">\u00davod do datab\u00e1zov\u00fdch syst\u00e9m\u016f<\/a><\/noindex>.<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/www.youtube.com\/playlist?list=PLSE8ODhjZXja7K1hjZ01UTVDnGQdx5v5U\">Pokro\u010dil\u00e9 datab\u00e1zov\u00e9 syst\u00e9my<\/a><\/noindex>.<\/li>\n<\/ul>\n<p><b>2. U\u010den\u00ed SQL<\/b><\/p>\n<p>Cel\u00fd n\u00e1\u0161 \u017eivot jsou data. A abychom tato data extrahovali z datab\u00e1ze, mus\u00edte s nimi \u201emluvit\u201c jedn\u00edm jazykem.<\/p>\n<p>SQL (Structured Query Language \u2014 jazyk strukturovan\u00fdch dotaz\u016f) je jazykem komunikace v oblasti dat. Bez ohledu na to, co n\u011bkdo \u0159\u00edk\u00e1, SQL \u017eilo, \u017eije a bude \u017e\u00edt je\u0161t\u011b velmi dlouho.<\/p>\n<p>Pokud jste dlouho pracovali ve v\u00fdvoji, pravd\u011bpodobn\u011b jste si v\u0161imli, \u017ee se periodicky objevuj\u00ed f\u00e1my o brzk\u00e9m konci SQL. Jazyk byl vyvinut na za\u010d\u00e1tku 70. let a dodnes je nesm\u00edrn\u011b popul\u00e1rn\u00ed mezi analytiky, v\u00fdvoj\u00e1\u0159i a prost\u00fdmi nad\u0161enci.<br \/>\nBez znalosti SQL v datov\u00e9m in\u017een\u00fdrstv\u00ed se neobejdete, proto\u017ee nevyhnuteln\u011b budete muset vytv\u00e1\u0159et dotazy pro extrakci dat. V\u0161echny modern\u00ed datov\u00e9 sklady podporuj\u00ed SQL:<\/p>\n<ul>\n<li>Amazon Redshift<\/li>\n<li>HP Vertica<\/li>\n<li>Oracle<\/li>\n<li>SQL Server<\/li>\n<\/ul>\n<p>\u2026 a mnoho dal\u0161\u00edch.<\/p>\n<p>Pro anal\u00fdzu velk\u00e9ho mno\u017estv\u00ed dat ulo\u017een\u00fdch v distribuovan\u00fdch syst\u00e9mech, jako je HDFS, byly vynalezeny mechanismy SQL: Apache Hive, Impala atd. Vid\u00edte, \u017ee nikam odch\u00e1zet nem\u00e1.<\/p>\n<p>Jak se nau\u010dit SQL? Jednodu\u0161e se u\u010dte prax\u00ed.<\/p>\n<p>K tomu bych doporu\u010dil pod\u00edvat se na skv\u011blou p\u0159\u00edru\u010dku, kter\u00e1 je mimochodem zdarma, od <noindex><a rel=\"nofollow\" href=\"https:\/\/mode.com\/sql-tutorial\/introduction-to-sql\/\">Mode Analytics<\/a><\/noindex>.<\/p>\n<ol>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/www.datacamp.com\/courses\/intermediate-sql\/\">St\u0159edn\u011b pokro\u010dil\u00e9 SQL<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/www.datacamp.com\/courses\/joining-data-in-postgresql\">Spojov\u00e1n\u00ed dat v SQL<\/a><\/noindex><\/li>\n<\/ol>\n<p>Charakteristick\u00fdm rysem t\u011bchto kurz\u016f je interaktivn\u00ed prost\u0159ed\u00ed, ve kter\u00e9m m\u016f\u017eete ps\u00e1t a vykon\u00e1vat SQL dotazy p\u0159\u00edmo v prohl\u00ed\u017ee\u010di. Zdroje <noindex><a rel=\"nofollow\" href=\"https:\/\/modern-sql.com\/\">Modern SQL<\/a><\/noindex> nebudou na \u0161kodu. A m\u016f\u017eete tyto znalosti vyu\u017e\u00edt v <noindex><a rel=\"nofollow\" href=\"https:\/\/leetcode.com\/problemset\/database\/\">\u00faloh\u00e1ch Leetcode<\/a><\/noindex> v sekci Datab\u00e1ze.<\/p>\n<p><b>3. Programov\u00e1n\u00ed v Pythonu a Java\/Scala<\/b><\/p>\n<p>Pro\u010d se u\u010dit programovac\u00ed jazyk Python, u\u017e jsem psal v \u010dl\u00e1nku <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/datadriveninvestor\/python-vs-r-choosing-the-best-tool-for-ai-ml-data-science-7e0c2295e243\">Python vs R. V\u00fdb\u011br nejlep\u0161\u00edho n\u00e1stroje pro AI, ML a Data Science<\/a><\/noindex>. Co se t\u00fd\u010de Javy a Scaly, v\u011bt\u0161ina n\u00e1stroj\u016f pro ukl\u00e1d\u00e1n\u00ed a zpracov\u00e1n\u00ed obrovsk\u00fdch objem\u016f dat je naps\u00e1na v t\u011bchto jazyc\u00edch. Nap\u0159\u00edklad:<\/p>\n<ul>\n<li>Apache Kafka (Scala)<\/li>\n<li>Hadoop, HDFS (Java)<\/li>\n<li>Apache Spark (Scala)<\/li>\n<li>Apache Cassandra (Java)<\/li>\n<li>HBase (Java)<\/li>\n<li>Apache Hive (Java)<\/li>\n<\/ul>\n<p>Abyste porozum\u011bli, jak tyto n\u00e1stroje funguj\u00ed, mus\u00edte zn\u00e1t jazyky, ve kter\u00fdch jsou naps\u00e1ny. Funkcion\u00e1ln\u00ed p\u0159\u00edstup Scala umo\u017e\u0148uje efektivn\u011b \u0159e\u0161it \u00fakoly paraleln\u00edho zpracov\u00e1n\u00ed dat. Python, bohu\u017eel, nem\u016f\u017ee nab\u00eddnout rychlost a paraleln\u00ed zpracov\u00e1n\u00ed. Celkov\u011b znalost n\u011bkolika jazyk\u016f a programovac\u00edch paradigmat p\u0159\u00edzniv\u011b ovliv\u0148uje \u0161\u00ed\u0159i p\u0159\u00edstup\u016f k \u0159e\u0161en\u00ed probl\u00e9m\u016f.<\/p>\n<p>Abyste se pono\u0159ili do jazyka Scala, m\u016f\u017eete si p\u0159e\u010d\u00edst <noindex><a rel=\"nofollow\" href=\"https:\/\/www.amazon.com\/gp\/product\/0981531687\/ref=as_li_tl?ie=UTF8&amp;camp=1789&amp;creative=9325&amp;creativeASIN=0981531687&amp;linkCode=as2&amp;tag=adilkhash-20&amp;linkId=69314619f1e546e3921eb97c72cf4850\">Programov\u00e1n\u00ed v Scale<\/a><\/noindex> od autora jazyka. Tak\u00e9 spole\u010dnost Twitter zve\u0159ejnila dobr\u00e9ho \u00favodn\u00edho pr\u016fvodce \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.github.io\/scala_school\/\">Scala School<\/a><\/noindex>.<\/p>\n<p>Pokud jde o Python, pova\u017euji <noindex><a rel=\"nofollow\" href=\"https:\/\/www.amazon.com\/gp\/product\/1491946008\/ref=as_li_tl?ie=UTF8&amp;camp=1789&amp;creative=9325&amp;creativeASIN=1491946008&amp;linkCode=as2&amp;tag=adilkhash-20&amp;linkId=8a663e966770c24874e323133cc7a005\">Fluent Python<\/a><\/noindex> za nejlep\u0161\u00ed knihu st\u0159edn\u00ed \u00farovn\u011b.<\/p>\n<p><b>4. N\u00e1stroje pro pr\u00e1ci s velk\u00fdmi daty<\/b><\/p>\n<p>Zde je seznam nejpopul\u00e1rn\u011bj\u0161\u00edch n\u00e1stroj\u016f v oblasti velk\u00fdch dat:<\/p>\n<ul>\n<li>Apache Spark<\/li>\n<li>Apache Kafka<\/li>\n<li>Apache Hadoop (HDFS, HBase, Hive)<\/li>\n<li>Apache Cassandra<\/li>\n<\/ul>\n<p>V\u00edce informac\u00ed o budov\u00e1n\u00ed velk\u00fdch blok\u016f dat m\u016f\u017eete naj\u00edt v tomto \u00fa\u017easn\u00e9m <noindex><a rel=\"nofollow\" href=\"http:\/\/xyz.insightdataengineering.com\/blog\/pipeline_map\/\">interaktivn\u00edm prost\u0159ed\u00ed<\/a><\/noindex>. Nejobl\u00edben\u011bj\u0161\u00edmi n\u00e1stroji jsou Spark a Kafka. Ur\u010dit\u011b stoj\u00ed za to se je nau\u010dit, ide\u00e1ln\u011b pochopit, jak funguj\u00ed zevnit\u0159. Jay Kreps (spoluautor Kafky) v roce 2013 zve\u0159ejnil monument\u00e1ln\u00ed pr\u00e1ci <noindex><a rel=\"nofollow\" href=\"https:\/\/engineering.linkedin.com\/distributed-systems\/log-what-every-software-engineer-should-know-about-real-time-datas-unifying\">The Log: co by m\u011bl ka\u017ed\u00fd v\u00fdvoj\u00e1\u0159 softwaru v\u011bd\u011bt o abstrakci spojov\u00e1n\u00ed dat v re\u00e1ln\u00e9m \u010dase<\/a><\/noindex>, mimochodem, hlavn\u00ed my\u0161lenky z tohoto textu byly pou\u017eity p\u0159i vytv\u00e1\u0159en\u00ed Apache Kafky.<\/p>\n<ul>\n<li>\u00davodem do Hadoopu m\u016f\u017ee b\u00fdt <noindex><a rel=\"nofollow\" href=\"https:\/\/data-flair.training\/blogs\/hadoop-tutorials-home\/\">Kompletn\u00ed pr\u016fvodce osvojen\u00edm Hadoopu (zdarma)<\/a><\/noindex>.<\/li>\n<li>Nejkompletn\u011bj\u0161\u00ed pr\u016fvodce Apache Spark pro m\u011b je \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.amazon.com\/gp\/product\/1491912219\/ref=as_li_tl?ie=UTF8&amp;camp=1789&amp;creative=9325&amp;creativeASIN=1491912219&amp;linkCode=as2&amp;tag=adilkhash-20&amp;linkId=5b206424060cfc80a33d13b05c0bfee2\">Spark: kompletn\u00ed pr\u016fvodce<\/a><\/noindex>.<\/li>\n<\/ul>\n<p><b>5. Cloudov\u00e9 platformy<\/b><\/p>\n<p><img decoding=\"async\" alt=\"Kdo jsou datov\u00ed in\u017een\u00fd\u0159i a jak se jimi st\u00e1t?\" src=\"\/wp-content\/uploads\/2019\/05\/cc435bc9f9b91ec87d1cf7a591cf84a2.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nZnalost alespo\u0148 jedn\u00e9 cloudov\u00e9 platformy je na seznamu z\u00e1kladn\u00edch po\u017eadavk\u016f kladen\u00fdch na uchaze\u010de o pozici datov\u00e9ho in\u017een\u00fdra. Zam\u011bstnavatel\u00e9 d\u00e1vaj\u00ed p\u0159ednost Amazon Web Services, na druh\u00e9m m\u00edst\u011b je cloudov\u00e1 platforma Google a t\u0159et\u00ed m\u00edsto zauj\u00edm\u00e1 Microsoft Azure.<\/p>\n<p>Mus\u00edte se dob\u0159e orientovat v Amazon EC2, AWS Lambda, Amazon S3, DynamoDB.<\/p>\n<p><b>6. Distribuovan\u00e9 syst\u00e9my<\/b><\/p>\n<p>Pr\u00e1ce s velk\u00fdmi daty zahrnuje existenci klastr\u016f nez\u00e1visle funguj\u00edc\u00edch po\u010d\u00edta\u010d\u016f, jejich\u017e spojen\u00ed je zaji\u0161t\u011bno p\u0159es s\u00ed\u0165. \u010c\u00edm v\u011bt\u0161\u00ed je klastr, t\u00edm v\u011bt\u0161\u00ed je pravd\u011bpodobnost selh\u00e1n\u00ed jeho uzl\u016f. Abyste se stali skv\u011bl\u00fdm odborn\u00edkem na data, mus\u00edte se pono\u0159it do probl\u00e9m\u016f a existuj\u00edc\u00edch \u0159e\u0161en\u00ed pro distribuovan\u00e9 syst\u00e9my. Tato oblast je star\u00e1 a komplikovan\u00e1.<\/p>\n<p>Andrew Tanenbaum je pova\u017eov\u00e1n za pr\u016fkopn\u00edka v t\u00e9to oblasti. Pro ty, kte\u0159\u00ed se neboj\u00ed teorie, doporu\u010duji jeho knihu <noindex><a rel=\"nofollow\" href=\"https:\/\/www.amazon.com\/gp\/product\/1543057381\/ref=as_li_tl?ie=UTF8&amp;camp=1789&amp;creative=9325&amp;creativeASIN=1543057381&amp;linkCode=as2&amp;tag=adilkhash-20&amp;linkId=721aedeb23c313bc46a92c134c5baafa\">\u201eDistribuovan\u00e9 syst\u00e9my\u201c<\/a><\/noindex>, pro za\u010d\u00e1te\u010dn\u00edky se to m\u016f\u017ee zd\u00e1t slo\u017eit\u00e9, ale skute\u010dn\u011b v\u00e1m to pom\u016f\u017ee zdokonalit va\u0161e dovednosti.<\/p>\n<p>Mysl\u00edm si, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.amazon.com\/gp\/product\/1449373321\/ref=as_li_tl?ie=UTF8&amp;camp=1789&amp;creative=9325&amp;creativeASIN=1449373321&amp;linkCode=as2&amp;tag=adilkhash-20&amp;linkId=e7e0e096aa5761066245eb90965ac849\">\u017ee \u201eNavrhov\u00e1n\u00ed aplikac\u00ed s vysokou intenzitou dat\u201c od Martiny Kleppmannov\u00e9<\/a><\/noindex> je nejlep\u0161\u00ed \u00favodn\u00ed kniha. Mimochodem, Martin m\u00e1 skv\u011bl\u00fd <noindex><a rel=\"nofollow\" href=\"https:\/\/martin.kleppmann.com\/\">blog<\/a><\/noindex>. Jeho pr\u00e1ce v\u00e1m pom\u016f\u017ee syst\u00e9mov\u011b uspo\u0159\u00e1dat znalosti o v\u00fdstavb\u011b modern\u00ed infrastruktury pro ukl\u00e1d\u00e1n\u00ed a zpracov\u00e1v\u00e1n\u00ed velk\u00fdch dat.<br \/>\nPro ty, kte\u0159\u00ed maj\u00ed r\u00e1di sledov\u00e1n\u00ed vide\u00ed, je na YouTube kurz <noindex><a rel=\"nofollow\" href=\"https:\/\/www.youtube.com\/watch?v=w8KFPWkK0bI&amp;list=PLawkBQ15NDEkDJ5IyLIJUTZ1rRM9YQq6N&amp;index=2&amp;t=0s\">Distribuovan\u00e9 po\u010d\u00edta\u010dov\u00e9 syst\u00e9my<\/a><\/noindex>.<\/p>\n<p><b>7. Datov\u00e9 toky<\/b><\/p>\n<p><img decoding=\"async\" alt=\"Kdo jsou datov\u00ed in\u017een\u00fd\u0159i a jak se jimi st\u00e1t?\" src=\"\/wp-content\/uploads\/2019\/05\/cf1c8e2baad0cc79c0b8c3707741353a.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDatov\u00e9 toky jsou to, bez \u010deho nem\u016f\u017eete \u017e\u00edt jako datov\u00fd in\u017een\u00fdr.<\/p>\n<p>V\u011bt\u0161inu \u010dasu datov\u00fd in\u017een\u00fdr vytv\u00e1\u0159\u00ed takzvan\u00fd datov\u00fd pipeline, tedy vytv\u00e1\u0159\u00ed proces dod\u00e1v\u00e1n\u00ed dat z jednoho m\u00edsta na druh\u00e9. Mohou to b\u00fdt u\u017eivatelsk\u00e9 sc\u00e9n\u00e1\u0159e, kter\u00e9 vedou k API extern\u00ed slu\u017eby nebo prov\u00e1d\u011bj\u00ed SQL dotazy, dopl\u0148uj\u00ed data a ukl\u00e1daj\u00ed je do centralizovan\u00e9ho \u00falo\u017ei\u0161t\u011b (datov\u00e9ho skladu) nebo \u00falo\u017ei\u0161t\u011b nestrukturovan\u00fdch dat (datov\u00fdch jezer).<\/p>\n<p><b>Shrnut\u00ed: hlavn\u00ed kontroln\u00ed seznam datov\u00e9ho in\u017een\u00fdra<\/b><\/p>\n<p><img decoding=\"async\" alt=\"Kdo jsou datov\u00ed in\u017een\u00fd\u0159i a jak se jimi st\u00e1t?\" src=\"\/wp-content\/uploads\/2019\/05\/de0eca662b2246e63901afb89c9f255f.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nZ\u00e1v\u011brem \u2014 je t\u0159eba m\u00edt dobr\u00e9 porozum\u011bn\u00ed n\u00e1sleduj\u00edc\u00edmu:<\/p>\n<ul>\n<li>Informa\u010dn\u00ed syst\u00e9my;<\/li>\n<li>V\u00fdvoj softwaru (Agiln\u00ed, DevOps, Design Techniques, SOA);<\/li>\n<li>Distribuovan\u00e9 syst\u00e9my a paraleln\u00ed programov\u00e1n\u00ed;<\/li>\n<li>Z\u00e1klady datab\u00e1z\u00ed \u2014 pl\u00e1nov\u00e1n\u00ed, n\u00e1vrh, provoz a odstra\u0148ov\u00e1n\u00ed chyb;<\/li>\n<li>N\u00e1vrh experiment\u016f \u2014 A\/B testy k prok\u00e1z\u00e1n\u00ed koncept\u016f, ur\u010den\u00ed spolehlivosti, v\u00fdkonu syst\u00e9m\u016f a tak\u00e9 k vyvinut\u00ed spolehliv\u00fdch cest pro operativn\u00ed poskytov\u00e1n\u00ed dobr\u00fdch \u0159e\u0161en\u00ed.<\/li>\n<\/ul>\n<p>To jsou jen n\u011bkter\u00e9 po\u017eadavky, abyste se stali datov\u00fdm in\u017een\u00fdrem, proto se seznamte a porozum\u011bjte datov\u00fdm syst\u00e9m\u016fm, informa\u010dn\u00edm syst\u00e9m\u016fm, kontinu\u00e1ln\u00edmu dod\u00e1v\u00e1n\u00ed \/ nasazen\u00ed \/ integraci, programovac\u00edm jazyk\u016fm a dal\u0161\u00edm t\u00e9mat\u016fm v oblasti informatiky (ne ve v\u0161ech p\u0159edm\u011btech).<\/p>\n<p><b>A nakonec posledn\u00ed, ale velmi d\u016fle\u017eit\u00e1 v\u011bc, kterou chci \u0159\u00edct.<\/b><\/p>\n<blockquote><p><i><b>Cesta k Data Engineering nen\u00ed tak jednoduch\u00e1, jak se m\u016f\u017ee zd\u00e1t. Nekomunikuje s v\u00e1mi, frustrace je na denn\u00edm po\u0159\u00e1dku a mus\u00edte b\u00fdt na to p\u0159ipraveni. N\u011bkter\u00e9 okam\u017eiky na t\u00e9to cest\u011b v\u00e1s mohou p\u0159im\u011bt v\u0161echno vzd\u00e1t. Ale je to opravdov\u00e1 pr\u00e1ce a proces u\u010den\u00ed.<\/b><\/i><\/p><\/blockquote>\n<p>Jednodu\u0161e to nezkreslujte hned od za\u010d\u00e1tku. Cel\u00fd smysl cesty je nau\u010dit se co nejv\u00edce a b\u00fdt p\u0159ipraven na nov\u00e9 v\u00fdzvy.<br \/>\nTady je skv\u011bl\u00fd obr\u00e1zek, na kter\u00fd jsem narazil, a kter\u00fd dob\u0159e ilustruje tento okam\u017eik:<\/p>\n<p><img decoding=\"async\" alt=\"Kdo jsou datov\u00ed in\u017een\u00fd\u0159i a jak se jimi st\u00e1t?\" src=\"\/wp-content\/uploads\/2019\/05\/9cc8db9011e5f54717d7e9f31f915523.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA ano, nezapome\u0148te se vyhnout vyho\u0159en\u00ed a odpo\u010d\u00edvat. To je tak\u00e9 velmi d\u016fle\u017eit\u00e9. Hodn\u011b \u0161t\u011bst\u00ed!<\/p>\n<p>Jak se v\u00e1m \u010dl\u00e1nek l\u00edb\u00ed, p\u0159\u00e1tel\u00e9? Zveme v\u00e1s na <noindex><a rel=\"nofollow\" href=\"https:\/\/otus.pw\/RCuj\/\">bezplatn\u00fd webin\u00e1\u0159<\/a><\/noindex>, kter\u00fd se kon\u00e1 ji\u017e dnes v 20:00. B\u011bhem webin\u00e1\u0159e si promluv\u00edme o tom, jak vybudovat efektivn\u00ed a \u0161k\u00e1lovateln\u00fd syst\u00e9m zpracov\u00e1n\u00ed dat pro mal\u00e9 firmy nebo startupy s minim\u00e1ln\u00edmi n\u00e1klady. V praxi se sezn\u00e1m\u00edme s n\u00e1stroji pro zpracov\u00e1n\u00ed dat Google Cloud. T\u011b\u0161\u00edme se na shledanou!<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/otus\/blog\/452670\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0418 \u0441\u043d\u043e\u0432\u0430 \u0437\u0434\u0440\u0430\u0432\u0441\u0442\u0432\u0443\u0439\u0442\u0435! \u0417\u0430\u0433\u043e\u043b\u043e\u0432\u043e\u043a \u0441\u0442\u0430\u0442\u044c\u0438 \u0433\u043e\u0432\u043e\u0440\u0438\u0442 \u0441\u0430\u043c \u043e \u0441\u0435\u0431\u0435. \u0412 \u043f\u0440\u0435\u0434\u0434\u0432\u0435\u0440\u0438\u0438 \u0441\u0442\u0430\u0440\u0442\u0430 \u043a\u0443\u0440\u0441\u0430 \u00abData Engineer\u00bb \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u043c \u0440\u0430\u0437\u043e\u0431\u0440\u0430\u0442\u044c\u0441\u044f \u0432 \u0442\u043e\u043c, \u043a\u0442\u043e \u0436\u0435 \u0442\u0430\u043a\u0438\u0435 \u0434\u0430\u0442\u0430-\u0438\u043d\u0436\u0435\u043d\u0435\u0440\u044b. \u0412 \u0441\u0442\u0430\u0442\u044c\u0435 \u043e\u0447\u0435\u043d\u044c \u043c\u043d\u043e\u0433\u043e \u043f\u043e\u043b\u0435\u0437\u043d\u044b\u0445 \u0441\u0441\u044b\u043b\u043e\u043a. \u041f\u0440\u0438\u044f\u0442\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0447\u0442\u0435\u043d\u0438\u044f. \u041f\u0440\u043e\u0441\u0442\u043e\u0435 \u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u043e \u043e \u0442\u043e\u043c, \u043a\u0430\u043a \u043f\u043e\u0439\u043c\u0430\u0442\u044c \u0432\u043e\u043b\u043d\u0443 Data Engineering \u0438 \u043d\u0435 \u0434\u0430\u0442\u044c \u0435\u0439 \u0437\u0430\u0442\u044f\u043d\u0443\u0442\u044c \u0432\u0430\u0441 \u0432 \u043f\u0443\u0447\u0438\u043d\u0443. \u0421\u043a\u043b\u0430\u0434\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u0432\u043f\u0435\u0447\u0430\u0442\u043b\u0435\u043d\u0438\u0435, \u0447\u0442\u043e \u0432 \u043d\u0430\u0448\u0438 \u0434\u043d\u0438 \u043a\u0430\u0436\u0434\u044b\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25729,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-34083","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0418 \u0441\u043d\u043e\u0432\u0430 \u0437\u0434\u0440\u0430\u0432\u0441\u0442\u0432\u0443\u0439\u0442\u0435! \u0417\u0430\u0433\u043e\u043b\u043e\u0432\u043e\u043a \u0441\u0442\u0430\u0442\u044c\u0438 \u0433\u043e\u0432\u043e\u0440\u0438\u0442 \u0441\u0430\u043c \u043e \u0441\u0435\u0431\u0435.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/kto-takie-data-inzhenery-i-kak-imi-stanovyatsya\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u041a\u0442\u043e \u0442\u0430\u043a\u0438\u0435 \u0434\u0430\u0442\u0430-\u0438\u043d\u0436\u0435\u043d\u0435\u0440\u044b, \u0438 \u043a\u0430\u043a \u0438\u043c\u0438 \u0441\u0442\u0430\u043d\u043e\u0432\u044f\u0442\u0441\u044f? 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