{"id":55011,"date":"2020-01-10T00:00:00","date_gmt":"2020-01-09T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/bd-messendzhera-ch-1-proektiruem-karkas-bazy"},"modified":"2020-02-18T14:03:05","modified_gmt":"2020-02-18T11:03:05","slug":"bd-messendzhera-ch-1-proektiruem-karkas-bazy","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/administrirovanie\/bd-messendzhera-ch-1-proektiruem-karkas-bazy","title":{"rendered":"A messenger adatb\u00e1zisa (1. r\u00e9sz): az adatb\u00e1zis keret\u00e9nek megtervez\u00e9se","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Hogyan lehet az \u00fczleti k\u00f6vetelm\u00e9nyeket konkr\u00e9t adatstrukt\u00far\u00e1kba \u00e1t\u00fcltetni, a p\u00e9ld\u00e1n kereszt\u00fcl, ahogyan a \"null\u00e1r\u00f3l\" tervezz\u00fck meg a messenger adatb\u00e1zis\u00e1t?<\/p>\n<ul>\n<li>1. r\u00e9sz: az adatb\u00e1zis v\u00e1zszerkezet\u00e9nek megtervez\u00e9se<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/483170\/\">2. r\u00e9sz: \u00e9l\u0151 szekcion\u00e1l\u00e1s<\/a><\/noindex><\/li>\n<\/ul>\n<p>\n<img decoding=\"async\" alt=\"A messenger adatb\u00e1zisa (1. r\u00e9sz): az adatb\u00e1zis keret\u00e9nek megtervez\u00e9se\" src=\"\/wp-content\/uploads\/2020\/01\/d4e85052405da3f6580e4e931c292079.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nAz adatb\u00e1zisunk nem lesz olyan nagy \u00e9s elosztott, <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vk\/blog\/342570\/\">mint a VKontakte<\/a><\/noindex> vagy <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/oleg-bunin\/blog\/340976\/\">Badoo<\/a><\/noindex>, hanem \"csak, hogy legyen\", de j\u00f3l -- funkcion\u00e1lisan, gyorsan \u00e9s <b>egyetlen szerverre elf\u00e9rjen<\/b> PostgreSQL -- hogy k\u00fcl\u00f6n p\u00e9ld\u00e1nyt lehessen telep\u00edteni valahol az oldal\u00e1n, p\u00e9ld\u00e1ul.<\/p>\n<p>Ez\u00e9rt nem fogjuk \u00e9rinteni a sharding, replik\u00e1ci\u00f3 \u00e9s f\u00f6ldrajzilag elosztott rendszerek k\u00e9rd\u00e9seit, hanem a DB-beli s\u00e9m\u00e1kra \u00f6sszpontos\u00edtunk.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>1. l\u00e9p\u00e9s: Kicsit \u00fczlet-specifikus<\/h2>\n<p>\nA kommunik\u00e1ci\u00f3nkat nem absztrakt m\u00f3don tervezz\u00fck, hanem be\u00e1gyazzuk a <noindex><a rel=\"nofollow\" href=\"https:\/\/sbis.ru\/help\/work_in\/sms\/\">v\u00e1llalati k\u00f6z\u00f6ss\u00e9gi h\u00e1l\u00f3zat<\/a><\/noindex>k\u00f6rnyezet\u00e9be. Vagyis az emberek nem \"csak v\u00e1ltanak \u00fczeneteket\", hanem kommunik\u00e1lnak egym\u00e1ssal egy adott \u00fczleti feladat megold\u00e1s\u00e1nak kontextus\u00e1ban.<\/p>\n<p>Milyen feladatok l\u00e9teznek az \u00fczletben?.. N\u00e9zz\u00fck meg p\u00e9ld\u00e1ul Vasilyt, a fejleszt\u00e9si oszt\u00e1ly vezet\u0151j\u00e9t.<\/p>\n<ul>\n<li><i>\"Nyikolaj, erre a feladatra a jav\u00edt\u00e1s m\u00e1r ma sz\u00fcks\u00e9ges!\"<\/i><br \/>\nEz\u00e9rt a kommunik\u00e1ci\u00f3 egy bizonyos kontextusban folytat\u00f3dhat, <b>dokumentum<\/b>.<\/li>\n<li><i>\"Kolya, menj\u00fcnk este Dota-ozni?\"<\/i><br \/>\nVagyis m\u00e9g egy p\u00e1r besz\u00e9lget\u0151 k\u00f6z\u00f6tt is a kommunik\u00e1ci\u00f3 egyszerre t\u00f6bb t\u00e9m\u00e1ban zajlik <b>k\u00fcl\u00f6nb\u00f6z\u0151 t\u00e9m\u00e1k<\/b>.<\/li>\n<li><i>\"P\u00e9ter, Nyikolaj, n\u00e9zd meg a csatolt \u00e1rlist\u00e1t az \u00faj szerverhez.\"<\/i><br \/>\nTeh\u00e1t egy \u00fczenetnek lehet <b>t\u00f6bb c\u00edmzettje<\/b>. Egy \u00fczenet tartalmazhat <b>csatolt f\u00e1jlokat<\/b>.<\/li>\n<li><i>\"Semen, te is n\u00e9zd meg.\"<\/i><br \/>\n\u00c9s lehet\u0151s\u00e9g kell, hogy legyen m\u00e1r megl\u00e9v\u0151 besz\u00e9lget\u00e9sbe <b>\u00faj r\u00e9sztvev\u0151t megh\u00edvni<\/b>.<\/li>\n<\/ul>\n<p>\nEddig meg\u00e1lljunk a \"nyilv\u00e1nval\u00f3\" ig\u00e9nyek list\u00e1j\u00e1val.<\/p>\n<blockquote><p>An\u00e9lk\u00fcl, hogy meg\u00e9rten\u00e9nk a feladat alkalmaz\u00e1si saj\u00e1toss\u00e1gait \u00e9s az azok \u00e1ltal t\u00e1masztott korl\u00e1tokat, szinte lehetetlen <b>hat\u00e9kony<\/b> adatb\u00e1zis-s\u00e9m\u00e1t tervezni a megold\u00e1shoz.<\/p><\/blockquote>\n<p><\/p>\n<h2>2. l\u00e9p\u00e9s: Minim\u00e1lis logikai s\u00e9ma<\/h2>\n<p>\nA s\u00e9ma eddig nagyon hasonl\u00edt az email kommunik\u00e1ci\u00f3hoz -- a hagyom\u00e1nyos \u00fczleti eszk\u00f6zh\u00f6z. Igen, \"algoritmikusan\" sok \u00fczleti feladat hasonl\u00f3 egym\u00e1shoz, ez\u00e9rt az azok megold\u00e1s\u00e1hoz haszn\u00e1lt eszk\u00f6z\u00f6k is szerkezetileg hasonl\u00f3ak lesznek.<\/p>\n<p>R\u00f6gz\u00edts\u00fck a m\u00e1r elk\u00e9sz\u00fclt entit\u00e1sok k\u00f6z\u00f6tti logikai kapcsolatot. Az egyszer\u0171s\u00e9g kedv\u00e9\u00e9rt a modell\u00fcnk meg\u00e9rt\u00e9s\u00e9hez a legegyszer\u0171bb megjelen\u00edt\u00e9st alkalmazzuk, <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/ER-%D0%BC%D0%BE%D0%B4%D0%B5%D0%BB%D1%8C\">ER-modell<\/a><\/noindex> bonyolult UML vagy IDEF- jegyzetek n\u00e9lk\u00fcl:<\/p>\n<p><img decoding=\"async\" alt=\"A messenger adatb\u00e1zisa (1. r\u00e9sz): az adatb\u00e1zis keret\u00e9nek megtervez\u00e9se\" src=\"\/wp-content\/uploads\/2020\/01\/75d0b3cf9e5a44ae3e243449fa406fbc.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nP\u00e9ld\u00e1nkban a szem\u00e9ly, a dokumentum \u00e9s a f\u00e1jl bin\u00e1ris \u00bbteste\u00ab olyan \u00bbk\u00fcls\u0151\u00ab entit\u00e1sok, amelyek \u00f6n\u00e1ll\u00f3an l\u00e9teznek a szolg\u00e1ltat\u00e1sunk n\u00e9lk\u00fcl is. \u00cdgy ezeket k\u00e9s\u0151bb egyszer\u0171 hivatkoz\u00e1sk\u00e9nt kezelj\u00fck, mint \u00bbvalahov\u00e1\u00ab mutat\u00f3 UUID-t.<\/p>\n<blockquote><p>Rajzoljon <b>a lehet\u0151 legegyszer\u0171bb diagramokat<\/b> \u2014 a legt\u00f6bben, akiknek bemutatja \u0151ket, nem szak\u00e9rt\u0151k az UML\/IDEF olvas\u00e1s\u00e1ban. De \u2014 mindenk\u00e9ppen rajzoljon.<\/p><\/blockquote>\n<p><\/p>\n<h2>3. l\u00e9p\u00e9s: V\u00e1zoljuk fel a t\u00e1bl\u00e1k strukt\u00far\u00e1j\u00e1t<\/h2>\n<p>\n<b class=\"spoiler_title\">A t\u00e1bl\u00e1k \u00e9s mez\u0151k neveir\u0151l<\/b>A \"orosz\" mez\u0151- \u00e9s t\u00e1blanevekhez k\u00fcl\u00f6nf\u00e9lek\u00e9ppen viszonyulhatunk, de ez \u00edzl\u00e9s k\u00e9rd\u00e9se. Mivel <noindex><a rel=\"nofollow\" href=\"https:\/\/tensor.ru\/about\/career\/vacancies\">n\u00e1lunk a \"Tensorban\"<\/a><\/noindex> nincsenek k\u00fclf\u00f6ldi fejleszt\u0151k, \u00e9s a PostgreSQL lehet\u0151v\u00e9 teszi, hogy neveket adjon ak\u00e1r \u00edr\u00e1sjelekb\u0151l is, ha <u>id\u00e9z\u0151jelbe vannak z\u00e1rva<\/u>, ez\u00e9rt megpr\u00f3b\u00e1ljuk az objektumokat egy\u00e9rtelm\u0171en \u00e9rthet\u0151 m\u00f3don elnevezni, hogy ne legyenek f\u00e9lre\u00e9rt\u00e9sek.<br \/>\nMivel \u00fczeneteket t\u00f6bb ember \u00edr egyszerre, egyesek ezt ak\u00e1r <u>offline m\u00f3don is<\/u>, a legegyszer\u0171bb opci\u00f3 a <b>UUID-k haszn\u00e1lata az azonos\u00edt\u00f3kra<\/b> nemcsak a k\u00fcls\u0151 entit\u00e1sok eset\u00e9ben, hanem a szolg\u00e1ltat\u00e1sunkon bel\u00fcli \u00f6sszes objektumra is. R\u00e1ad\u00e1sul ezeket ak\u00e1r az \u00fcgyf\u00e9loldalon is gener\u00e1lhatjuk \u2014 ez seg\u00edt megtartani az \u00fczenetek k\u00fcld\u00e9s\u00e9t, amikor az adatb\u00e1zis r\u00f6vid id\u0151re nem \u00e9rhet\u0151 el, \u00e9s a \u00fctk\u00f6z\u00e9s val\u00f3sz\u00edn\u0171s\u00e9ge rendk\u00edv\u00fcl alacsony.<\/p>\n<p>A t\u00e1bl\u00e1k tervezett strukt\u00far\u00e1ja az adatb\u00e1zisunkban a k\u00f6vetkez\u0151 form\u00e1t \u00f6lt:<br \/>\n<b class=\"spoiler_title\">T\u00e1bl\u00e1k : RU<\/b><\/p>\n<pre><code class=\"sql\">CREATE TABLE \"T\u00e9ma\"(\n  \"T\u00e9ma\"\n    uuid\n      PRIMARY KEY\n, \"Dokumentum\"\n    uuid\n, \"C\u00edm\"\n    text\n);\n\nCREATE TABLE \"\u00dczenet\"(\n  \"\u00dczenet\"\n    uuid\n      PRIMARY KEY\n, \"T\u00e9ma\"\n    uuid\n, \"Szerz\u0151\"\n    uuid\n, \"D\u00e1tumId\u0151\"\n    timestamp\n, \"Sz\u00f6veg\"\n    text\n);\n\nCREATE TABLE \"C\u00edmzett\"(\n  \"\u00dczenet\"\n    uuid\n, \"Szem\u00e9ly\"\n    uuid\n, PRIMARY KEY(\"\u00dczenet\", \"Szem\u00e9ly\")\n);\n\nCREATE TABLE \"F\u00e1jl\"(\n  \"F\u00e1jl\"\n    uuid\n      PRIMARY KEY\n, \"\u00dczenet\"\n    uuid\n, \"BLOB\"\n    uuid\n, \"N\u00e9v\"\n    text\n);<\/code><\/pre>\n<p>\n<b class=\"spoiler_title\">T\u00e1bl\u00e1k : EN<\/b><\/p>\n<pre><code class=\"sql\">CREATE TABLE theme(\n  theme\n    uuid\n      PRIMARY KEY\n, document\n    uuid\n, title\n    text\n);\n\nCREATE TABLE message(\n  message\n    uuid\n      PRIMARY KEY\n, theme\n    uuid\n, author\n    uuid\n, dt\n    timestamp\n, body\n    text\n);\n\nCREATE TABLE message_addressee(\n  message\n    uuid\n, person\n    uuid\n, PRIMARY KEY(message, person)\n);\n\nCREATE TABLE message_file(\n  file\n    uuid\n      PRIMARY KEY\n, message\n    uuid\n, content\n    uuid\n, filename\n    text\n);<\/code><\/pre>\n<p><\/p>\n<blockquote><p>A legegyszer\u0171bb dolog a form\u00e1tum le\u00edr\u00e1s\u00e1n\u00e1l a kapcsolati h\u00e1l\u00f3 kidolgoz\u00e1s\u00e1t kezdeni <b>az olyan t\u00e1bl\u00e1kb\u00f3l, amelyek nem hivatkoznak<\/b> senkire.<\/p><\/blockquote>\n<p><\/p>\n<h2>4. l\u00e9p\u00e9s: Felfedezz\u00fck a nem nyilv\u00e1nval\u00f3 ig\u00e9nyeket<\/h2>\n<p>\nMinden megvan, megtervezt\u00fck az adatb\u00e1zist, amelybe kiv\u00e1l\u00f3an lehet \u00edrni \u00e9s <i><b>olvasni.<\/b><\/i> L\u00e9pj\u00fcnk a szolg\u00e1ltat\u00e1sunk felhaszn\u00e1l\u00f3j\u00e1nak hely\u00e9be \u2014 mit szeretn\u00e9nk tenni a seg\u00edts\u00e9g\u00e9vel?<\/p>\n<p>Legutols\u00f3 \u00fczenetek<\/p>\n<ul>\n<li><i>kronol\u00f3giai sorrendben rendezett<\/i><br \/>\nEz <b>k\u00fcl\u00f6nb\u00f6z\u0151 jellemz\u0151k alapj\u00e1n k\u00e9sz\u00edtett \u00bbsaj\u00e1t\u00ab \u00fczeneteim nyilv\u00e1ntart\u00e1sa. Ahol \u00e9n vagyok az egyik c\u00edmzett, ahol \u00e9n vagyok a szerz\u0151, ahol \u00edrtak nekem, de nem v\u00e1laszoltam, ahol nem v\u00e1laszoltak nekem, \u2026<\/b> a k\u00fcl\u00f6nb\u00f6z\u0151 szempontok szerint a \"saj\u00e1t\" \u00fczeneteim nyilv\u00e1ntart\u00e1sa. Ahol egyik c\u00edmzett vagyok, ahol \u00e9n vagyok a szerz\u0151, ahol \u00edrtak nekem, de nem v\u00e1laszoltam, ahol nekem nem v\u00e1laszoltak, &#8230;<\/li>\n<li><i>Ki vesz r\u00e9szt egy\u00e1ltal\u00e1n ebben a hossz\u00fa-hossz\u00fa besz\u00e9lget\u00e9sben?<\/i><br \/>\nKi vesz r\u00e9szt ebben a hossz\u00fa-hossz\u00fa cseveg\u00e9sben?<\/li>\n<\/ul>\n<p>\nStrukt\u00far\u00e1nk lehet\u0151v\u00e9 teszi mindk\u00e9t feladat megold\u00e1s\u00e1t \"\u00e1ltal\u00e1ban\", de gyorsan - nem. A probl\u00e9ma az, hogy az els\u0151 feladat keret\u00e9n bel\u00fcl <b>nem lehet indexet l\u00e9trehozni<\/b>, amely mindegyik r\u00e9sztvev\u0151 sz\u00e1m\u00e1ra megfelel\u0151 (\u00e9s ki kell nyern\u00fcnk az \u00f6sszes rekordot), m\u00edg a m\u00e1sodik feladathoz sz\u00fcks\u00e9ges <b>mindegyik \u00fczenetet el\u0151h\u00fazni<\/b> a t\u00e9m\u00e1ban.<\/p>\n<blockquote><p>A felhaszn\u00e1l\u00f3k \u00e1ltal nem el\u0151re megfogalmazott feladatok s\u00falyos <b>hat\u00e1ssal lehetnek a teljes\u00edtm\u00e9nyre.<\/b>.<\/p><\/blockquote>\n<p><\/p>\n<h2>5. l\u00e9p\u00e9s: \u00c9sszer\u0171 denormaliz\u00e1l\u00e1s<\/h2>\n<p>\nMindk\u00e9t probl\u00e9m\u00e1nkat tov\u00e1bbi t\u00e1bl\u00e1k oldj\u00e1k meg, amelyekben <b>dupl\u00e1zzuk a sz\u00fcks\u00e9ges adataink egy r\u00e9sz\u00e9t<\/b>, amelyek sz\u00fcks\u00e9gesek a feladatainknak megfelel\u0151 indexek l\u00e9trehoz\u00e1s\u00e1hoz.<br \/>\n<img decoding=\"async\" alt=\"A messenger adatb\u00e1zisa (1. r\u00e9sz): az adatb\u00e1zis keret\u00e9nek megtervez\u00e9se\" src=\"\/wp-content\/uploads\/2020\/01\/f136a9904518b05bca74cc2b9c2f01b2.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b class=\"spoiler_title\">T\u00e1bl\u00e1k : RU<\/b><\/p>\n<pre><code class=\"sql\">CREATE TABLE \"\u00dczenetekRegiszter\"(\n  \"Tulajdonos\"\n    uuid\n, \"RegiszterT\u00edpus\"\n    smallint\n, \"D\u00e1tumId\u0151\"\n    timestamp\n, \"\u00dczenet\"\n    uuid\n, PRIMARY KEY(\"Tulajdonos\", \"RegiszterT\u00edpus\", \"\u00dczenet\")\n);\nCREATE INDEX ON \"\u00dczenetekRegiszter\"(\"Tulajdonos\", \"RegiszterT\u00edpus\", \"D\u00e1tumId\u0151\" DESC);\n\nCREATE TABLE \"T\u00e9maR\u00e9sztvev\u0151\"(\n  \"T\u00e9ma\"\n    uuid\n, \"Szem\u00e9ly\"\n    uuid\n, PRIMARY KEY(\"T\u00e9ma\", \"Szem\u00e9ly\")\n);<\/code><\/pre>\n<p>\n<b class=\"spoiler_title\">T\u00e1bl\u00e1k : EN<\/b><\/p>\n<pre><code class=\"sql\">CREATE TABLE message_registry(\n  owner\n    uuid\n, registry\n    smallint\n, dt\n    timestamp\n, message\n    uuid\n, PRIMARY KEY(owner, registry, message)\n);\nCREATE INDEX ON message_registry(owner, registry, dt DESC);\n\nCREATE TABLE theme_participant(\n  theme\n    uuid\n, person\n    uuid\n, PRIMARY KEY(theme, person)\n);<\/code><\/pre>\n<p>\nItt k\u00e9t tipikus megk\u00f6zel\u00edt\u00e9st alkalmaztunk, amelyeket a seg\u00e9dt\u00e1bl\u00e1k l\u00e9trehoz\u00e1sakor haszn\u00e1lnak:<\/p>\n<ul>\n<li><b>Rekordok megsokszoroz\u00e1sa<\/b><br \/>\nEgyetlen eredeti \u00fczenetb\u0151l azonnal t\u00f6bb k\u00f6vetkez\u0151 rekordot hozunk l\u00e9tre k\u00fcl\u00f6nb\u00f6z\u0151 nyilv\u00e1ntart\u00e1sokban k\u00fcl\u00f6nb\u00f6z\u0151 tulajdonosok sz\u00e1m\u00e1ra - a felad\u00f3 \u00e9s a c\u00edmzett sz\u00e1m\u00e1ra is. \u00cdgy minden nyilv\u00e1ntart\u00e1sunk mostant\u00f3l illeszkedik az indexhez - hiszen tipikus esetben csak az els\u0151 oldalt szeretn\u00e9nk l\u00e1tni.<\/li>\n<li><b>Rekordok egyediv\u00e9 t\u00e9tele<\/b><br \/>\nMinden egyes \u00fczenet elk\u00fcld\u00e9sekor egy adott t\u00e9ma keret\u00e9n bel\u00fcl elegend\u0151 ellen\u0151rizni, hogy m\u00e1r l\u00e9tezik-e ilyen rekord. Ha nem - hozz\u00e1adjuk a \"sz\u00f3t\u00e1runkhoz\".<\/li>\n<\/ul>\n<p>\nA cikk k\u00f6vetkez\u0151 r\u00e9sz\u00e9ben a <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/483170\/\">szekcion\u00e1l\u00e1s<\/a><\/noindex> implement\u00e1l\u00e1s\u00e1r\u00f3l lesz sz\u00f3<br \/>\n<br \/>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/483176\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u0430\u043a \u043c\u043e\u0436\u043d\u043e \u043f\u0435\u0440\u0435\u0432\u0435\u0441\u0442\u0438 \u0431\u0438\u0437\u043d\u0435\u0441-\u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u043a\u043e\u043d\u043a\u0440\u0435\u0442\u043d\u044b\u0435 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b \u0434\u0430\u043d\u043d\u044b\u0445 \u043d\u0430 \u043f\u0440\u0438\u043c\u0435\u0440\u0435 \u043f\u0440\u043e\u0435\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u00ab\u0441 \u043d\u0443\u043b\u044f\u00bb \u0431\u0430\u0437\u044b \u0434\u043b\u044f \u043c\u0435\u0441\u0441\u0435\u043d\u0434\u0436\u0435\u0440\u0430. \u0427\u0430\u0441\u0442\u044c 1: \u043f\u0440\u043e\u0435\u043a\u0442\u0438\u0440\u0443\u0435\u043c \u043a\u0430\u0440\u043a\u0430\u0441 \u0431\u0430\u0437\u044b \u0427\u0430\u0441\u0442\u044c 2: \u0441\u0435\u043a\u0446\u0438\u043e\u043d\u0438\u0440\u0443\u0435\u043c \u00ab\u043d\u0430\u0436\u0438\u0432\u0443\u044e\u00bb \u041d\u0430\u0448\u0430 \u0431\u0430\u0437\u0430 \u0431\u0443\u0434\u0435\u0442 \u043d\u0435 \u0442\u0430\u043a\u043e\u0439 \u043c\u0430\u0441\u0448\u0442\u0430\u0431\u043d\u043e\u0439 \u0438 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0439, \u043a\u0430\u043a \u0443 \u0412\u041a\u043e\u043d\u0442\u0430\u043a\u0442\u0435 \u0438\u043b\u0438 Badoo, \u0430 \u00ab\u0447\u0442\u043e\u0431\u044b \u0431\u044b\u043b\u043e\u00bb, \u043d\u043e \u0431\u044b\u043b\u043e \u0445\u043e\u0440\u043e\u0448\u043e \u2014 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e, \u0431\u044b\u0441\u0442\u0440\u043e \u0438 \u0443\u043c\u0435\u0449\u0430\u043b\u043e\u0441\u044c \u043d\u0430 \u043e\u0434\u043d\u043e\u043c \u0441\u0435\u0440\u0432\u0435\u0440\u0435 PostgreSQL \u2014 \u0447\u0442\u043e\u0431\u044b [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-55011","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - 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