{"id":95870,"date":"2020-10-04T13:41:59","date_gmt":"2020-10-04T11:41:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/pochemu-vazhno-proverit-po-na-vashej-shd-vysokoj-dostupnosti-999999"},"modified":"2020-10-04T13:41:59","modified_gmt":"2020-10-04T11:41:59","slug":"pochemu-vazhno-proverit-po-na-vashej-shd-vysokoj-dostupnosti-999999","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/administrirovanie\/pochemu-vazhno-proverit-po-na-vashej-shd-vysokoj-dostupnosti-999999","title":{"rendered":"De ce este important s\u0103 verifica\u021bi software-ul pe sistemul dumneavoastr\u0103 de stocare de date cu \u00eenalt\u0103 disponibilitate (99,9999%)","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"De ce este important s\u0103 verifica\u021bi software-ul pe sistemul dumneavoastr\u0103 de stocare de date cu \u00eenalt\u0103 disponibilitate (99,9999%)\" src=\"\/wp-content\/uploads\/2020\/10\/cbd2364e403d3bccdb0a7f05ab3973d7.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Care este versiunea de firmware cea mai \u201ecorect\u0103\u201d \u0219i \u201efunc\u021bional\u0103\u201d? Dac\u0103 stocarea asigur\u0103 o disponibilitate de 99,9999%, \u00eenseamn\u0103 c\u0103 va func\u021biona f\u0103r\u0103 \u00eentreruperi chiar \u0219i f\u0103r\u0103 actualizarea software-ului? Sau, dimpotriv\u0103, pentru a ob\u021bine o disponibilitate maxim\u0103, trebuie s\u0103 instal\u0103m \u00eentotdeauna cea mai recent\u0103 versiune a firmware-ului?&nbsp; Vom \u00eencerca s\u0103 r\u0103spundem la aceste \u00eentreb\u0103ri, baz\u00e2ndu-ne pe experien\u021ba noastr\u0103.<\/p>\n<h3>Introducere scurt\u0103<\/h3>\n<p>To\u021bi \u00een\u021belegem c\u0103 \u00een fiecare versiune de software, fie c\u0103 este vorba despre un sistem de operare sau un driver pentru un anumit dispozitiv, exist\u0103 adesea neajunsuri\/bug-uri \u0219i alte \u201eparticularit\u0103\u021bi\u201d care pot, la fel de bine, s\u0103 nu se \u201emanifeste\u201d p\u00e2n\u0103 la sf\u00e2r\u0219itul vie\u021bii echipamentului sau s\u0103 \u201eapar\u0103\u201d doar \u00een anumite condi\u021bii. Cantitatea \u0219i importan\u021ba acestor nuan\u021be depind de complexitatea (func\u021bionalitatea) software-ului \u0219i de calitatea test\u0103rii \u00een timpul dezvolt\u0103rii acestuia.&nbsp;<\/p>\n<p>Adesea, utilizatorii r\u0103m\u00e2n pe \u201efirmware-ul din fabric\u0103\u201d (faimosul \u2013 \u201efunc\u021bioneaz\u0103, deci nu te b\u0103ga\u201d) sau instaleaz\u0103 \u00eentotdeauna cea mai recent\u0103 versiune (\u00een opinia lor, cea mai recent\u0103 \u00eenseamn\u0103 cea mai func\u021bional\u0103). Noi urm\u0103m o abordare diferit\u0103 \u2013 analiz\u0103m notele de lansare pentru tot ceea ce folosim.<noindex><a rel=\"nofollow\" href=\"https:\/\/mclouds.ru\/pricing\/iaas\/\"> \u00een cloud mClouds<\/a><\/noindex> echipamentului \u0219i alegem cu aten\u021bie firmware-ul potrivit pentru fiecare unitate de echipament.  <\/p>\n<p>Am ajuns la aceast\u0103 concluzie, a\u0219a cum se spune, din experien\u021b\u0103. Pe baza experien\u021bei noastre de utilizare, vom explica de ce cele promise 99,9999% disponibilitate de c\u0103tre un sistem de stocare nu conteaz\u0103 nimic dac\u0103 nu urm\u0103ri\u021bi cu regularitate actualiz\u0103rile \u0219i descrierile software-ului. Cazul nostru se potrive\u0219te pentru utilizatorii de sisteme de stocare de orice furnizor, deoarece o situa\u021bie similar\u0103 se poate \u00eent\u00e2mpla cu hardware-ul oric\u0103rui produc\u0103tor.<\/p>\n<h3>Alegerea unui nou sistem de stocare a datelor<\/h3>\n<p>La sf\u00e2r\u0219itul anului trecut, infrastructura noastr\u0103&nbsp; s-a \u00eembog\u0103\u021bit cu un sistem interesant de stocare a datelor: modelul mai mic din gama IBM FlashSystem 5000, care, la momentul achizi\u021biei, era cunoscut sub denumirea de Storwize V5010e. Acum este v\u00e2ndut sub denumirea&nbsp; FlashSystem 5010, dar, de fapt, este aceea\u0219i baz\u0103 hardware cu acela\u0219i Spectrum Virtualize la interior.&nbsp;<\/p>\n<p>Existen\u021ba unui sistem unic de management - aceasta este, de altfel, principala diferen\u021b\u0103 a IBM FlashSystem. La modelele din seria inferioar\u0103, acesta nu se deosebe\u0219te practic de modelele mai performante. Alegerea unui model anume ofer\u0103 doar baza hardware corespunz\u0103toare, caracteristicile acesteia permi\u021b\u00e2nd utilizarea anumitor func\u021bionalit\u0103\u021bi sau asigurarea unui nivel mai ridicat de scalabilitate. Software-ul, \u00een acest context, identific\u0103 partea hardware \u0219i ofer\u0103 func\u021bionalitatea necesar\u0103 \u0219i suficient\u0103 pentru aceast\u0103 platform\u0103. <\/p>\n<p><img decoding=\"async\" alt=\"De ce este important s\u0103 verifica\u021bi software-ul pe sistemul dumneavoastr\u0103 de stocare de date cu \u00eenalt\u0103 disponibilitate (99,9999%)\" src=\"\/wp-content\/uploads\/2020\/10\/8290e2f24f3ac2428be8fd8953a3b915.png\" style=\"display:block;margin: 0 auto;\" \/>IBM FlashSystem 5010<\/p>\n<p>Scurt despre modelul nostru 5010. Este un sistem de stocare a datelor cu dou\u0103 controlere, de nivel entry. Poate g\u0103zdui discuri NLSAS, SAS \u0219i SSD. Stocarea NVMe nu este disponibil\u0103, deoarece acest model de sistem de stocare este destinat pentru solu\u021bionarea sarcinilor care nu necesit\u0103 performan\u021ba discurilor NVMe.<\/p>\n<p>Sistemul de stocare a fost achizi\u021bionat pentru arhivarea informa\u021biilor sau datelor la care nu se face apel frecvent. De aceea, ne-a fost suficient setul standard de func\u021bionalit\u0103\u021bi: tiering (Easy Tier), Thin Provision. Performan\u021ba pe discurile NLSAS la nivel de 1000-2000 IOPS ne-a mul\u021bumit de asemenea. <\/p>\n<h3>Experien\u021ba noastr\u0103 \u2014 cum nu am actualizat firmware-ul la timp<\/h3>\n<p>Acum, s\u0103 vorbim despre actualizarea software-ului. La momentul achizi\u021biei, sistemul avea deja o versiune de software Spectrum Virtualize pu\u021bin \u00eenvechit\u0103, \u0219i anume, <strong>8.2.1.3.<\/strong><\/p>\n<p>Am studiat descrierile firmware-urilor \u0219i&nbsp; am planificat o actualizare p\u00e2n\u0103 la<strong> 8.2.1.9<\/strong>. Dac\u0103 am fi fost pu\u021bin mai promp\u021bi, aceast\u0103 articol nu ar fi existat \u2014 pe un firmware mai nou, bug-ul nu s-ar fi \u00eent\u00e2mplat. Totu\u0219i, din anumite motive, actualizarea acestui sistem a fost am\u00e2nat\u0103.<\/p>\n<p>\u00cen urma unei mici \u00eent\u00e2rzieri \u00een actualizare, am avut parte de o situa\u021bie extrem de nepl\u0103cut\u0103, asem\u0103n\u0103toare celei descrise \u00een link: <noindex><a rel=\"nofollow\" href=\"https:\/\/www.ibm.com\/support\/pages\/node\/6172341\"><u>https:\/\/www.ibm.com\/support\/pages\/node\/6172341<\/u><\/a><\/noindex>.&nbsp;<\/p>\n<p>Da, \u00een firmware-ul acelei versiuni tocmai se afla un APAR (Authorized Program Analysis Report) HU02104, care se manifest\u0103 \u00een felul urm\u0103tor. Sub sarcin\u0103, \u00een anumite circumstan\u021be, cache-ul \u00eencepe s\u0103 se suprasolicite, dup\u0103 care sistemul intr\u0103 \u00een modul de protec\u021bie, \u00een care opre\u0219te intr\u0103rile \u0219i ie\u0219irile pentru pool (Pool). \u00cen cazul nostru, a p\u0103rut ca deconectarea a 3 discuri din grupul RAID \u00een modul RAID 6. Deconectarea dureaz\u0103 6 minute. Apoi, accesul la volumele din Pool este restabilit.<\/p>\n<p>Dac\u0103 cineva nu este familiarizat cu structura \u0219i denumirea entit\u0103\u021bilor logice \u00een contextul IBM Spectrum Virtualize, voi explica pe scurt.<\/p>\n<p><img decoding=\"async\" alt=\"De ce este important s\u0103 verifica\u021bi software-ul pe sistemul dumneavoastr\u0103 de stocare de date cu \u00eenalt\u0103 disponibilitate (99,9999%)\" src=\"\/wp-content\/uploads\/2020\/10\/7d288dde279067fa31012d41fb113643.png\" style=\"display:block;margin: 0 auto;\" \/>Structura elementelor logice ale sistemului de stocare<\/p>\n<p>Discurile sunt grupate \u00een unit\u0103\u021bi numite MDisk (Managed Disk). MDisk poate reprezenta un RAID clasic (0,1,10,5,6) sau unul virtualizat \u2013 DRAID (Distributed RAID). Utilizarea DRAID permite cre\u0219terea performan\u021bei matricei, deoarece toate discurile grupului vor fi utilizate \u0219i reduce timpul de reconstruc\u021bie, deoarece va trebui s\u0103 se recupereze doar blocuri specifice, nu toate datele de pe discul defect.<\/p>\n<p><img decoding=\"async\" alt=\"De ce este important s\u0103 verifica\u021bi software-ul pe sistemul dumneavoastr\u0103 de stocare de date cu \u00eenalt\u0103 disponibilitate (99,9999%)\" src=\"\/wp-content\/uploads\/2020\/10\/a5dabecb4791306910014b0e1e29224c.png\" style=\"display:block;margin: 0 auto;\" \/>Distribu\u021bia blocurilor de date pe discuri atunci c\u00e2nd se utilizeaz\u0103 Distributed RAID (DRAID) \u00een modul RAID-5.<\/p>\n<p>Aceast\u0103 schem\u0103 arat\u0103 logica procesului de reconstruc\u021bie DRAID \u00een cazul defect\u0103rii unui disc:<\/p>\n<p><img decoding=\"async\" alt=\"De ce este important s\u0103 verifica\u021bi software-ul pe sistemul dumneavoastr\u0103 de stocare de date cu \u00eenalt\u0103 disponibilitate (99,9999%)\" src=\"\/wp-content\/uploads\/2020\/10\/7d5db624f766b65cb5931cd08d840401.png\" style=\"display:block;margin: 0 auto;\" \/>Logica procesului de reconstruc\u021bie DRAID la defectarea unui disc<\/p>\n<p>Apoi, unul sau mai multe MDisk formeaz\u0103 a\u0219a-numitul Pool. \u00cen cadrul unui singur pool, nu se recomand\u0103 utilizarea de MDisk cu niveluri diferite de RAID\/DRAID pe discuri de acela\u0219i tip. Nu ne vom aprofunda \u00een acest aspect, deoarece pl\u0103nuim s\u0103 discut\u0103m despre aceasta \u00eentr-unul dintre articolele viitoare. De asemenea, Pool-ul este \u00eemp\u0103r\u021bit \u00een Volume, care sunt prezentate printr-unul sau alt protocol de acces blocat c\u0103tre gazde.<\/p>\n<p>Astfel, \u00een urma apari\u021biei situa\u021biei descrise \u00een <em>APAR HU02104<\/em>, din cauza e\u0219ecului logic al trei discuri, MDisk-ul a devenit nefunc\u021bional, ceea ce a dus la e\u0219ecul Pool-ului \u0219i a volumelor corespunz\u0103toare.<\/p>\n<p>Av\u00e2nd \u00een vedere c\u0103 aceste sisteme sunt destul de \u201einteligente\u201d, ele pot fi conectate la sistemul de monitorizare \u00een cloud IBM Storage Insights, care, \u00een caz de defectare, trimite automat o solicitare de service la suportul tehnic IBM. Se creeaz\u0103 o cerere \u0219i speciali\u0219tii IBM efectueaz\u0103 diagnosticarea de la distan\u021b\u0103 \u0219i iau leg\u0103tura cu utilizatorul sistemului.&nbsp;<\/p>\n<p>Datorit\u0103 acestui fapt, problema a fost rezolvat\u0103 destul de repede, iar suportul tehnic a oferit o recomandare rapid\u0103 pentru actualizarea sistemului nostru la versiunea de firmware 8.2.1.9, pe care o alesese anterior, \u00een care acest aspect era deja corectat. Acest lucru confirm\u0103 <noindex><a rel=\"nofollow\" href=\"https:\/\/public.dhe.ibm.com\/storage\/san\/sanvc\/release_notes\/821_releasenotes.html\"><u>nota de lansare corespunz\u0103toare<\/u><\/a><\/noindex><u>.<\/u><\/p>\n<h3>Concluzii \u0219i recomand\u0103rile noastre<\/h3>\n<p>Cum se spune: \u201ebine este ceea ce se termin\u0103 bine\u201d. Bug-ul din firmware nu a generat probleme serioase \u2014 func\u021bionarea serverelor a fost restabilit\u0103 \u00eentr-un timp scurt \u0219i f\u0103r\u0103 pierderi de date. La unii clien\u021bi a fost nevoie s\u0103 repornim ma\u015finile virtuale, dar \u00een general am fost preg\u0103ti\u021bi pentru consecin\u021be mai negative, deoarece facem zilnic copii de rezerv\u0103 ale tuturor elementelor infrastructurii \u0219i ma\u0219inilor clien\u021bilor.&nbsp;<\/p>\n<p>Am primit confirmarea c\u0103 chiar \u0219i sistemele de \u00eencredere cu 99,9999% disponibilitate promis\u0103 necesit\u0103 aten\u021bie \u0219i \u00eentre\u021binere prompt\u0103. \u00cen func\u021bie de situa\u021bie, am tras c\u00e2teva concluzii \u0219i \u00eemp\u0103rt\u0103\u0219im recomand\u0103rile noastre:<\/p>\n<ul>\n<li>\n<p>Trebuie s\u0103 urm\u0103ri\u021bi cu stricte\u021be apari\u021bia actualiz\u0103rilor, s\u0103 studia\u021bi notele de lansare pentru a verifica corectarea poten\u021bialelor probleme critice \u0219i s\u0103 efectua\u021bi la timp actualiz\u0103rile planificate. <\/p>\n<p>Acesta este un aspect organizatoric \u0219i chiar destul de evident, asupra c\u0103ruia, la prima vedere, nu ar trebui s\u0103 ne concentr\u0103m. Cu toate acestea, pe acest \u201eteren plat\u201d se poate c\u0103lca u\u0219or pe bec. De fapt, tocmai acest aspect a dus la nepl\u0103cerile men\u021bionate mai sus. Trata\u021bi cu seriozitate elaborarea regulilor de actualizare \u0219i urm\u0103ri\u021bi respectarea lor cu aceea\u0219i aten\u021bie. Acest punct este mai ales legat de no\u021biunea de \u201edisciplina\u201d.<\/p>\n<\/li>\n<li>\n<p>Este \u00eentotdeauna mai bine s\u0103 ave\u021bi sistemul cu versiunea actualizat\u0103 a software-ului. Iar actualizat\u0103 - nu \u00eenseamn\u0103 doar c\u0103 are o denumire numeric\u0103 mai mare, ci anume c\u0103 a fost lansat\u0103 mai recent.&nbsp;<\/p>\n<p>De exemplu, IBM men\u021bine \u00een stare actualizat\u0103 pentru sistemele sale de stocare date m\u0103car dou\u0103 versiuni ale software-ului. La momentul redact\u0103rii acestui articol - acestea sunt 8.2 \u0219i 8.3. Actualiz\u0103rile pentru 8.2 sunt lansate mai devreme. Apoi, cu o mic\u0103 \u00eent\u00e2rziere, de obicei apare o actualizare similar\u0103 pentru 8.3. <\/p>\n<p>Versiunea 8.3 are o serie de avantaje func\u021bionale, de exemplu, posibilitatea extinderii MDisk (\u00een modul DRAID) prin ad\u0103ugarea unuia sau mai multor discuri noi (aceast\u0103 posibilitate a ap\u0103rut \u00eencep\u00e2nd cu versiunea 8.3.1). Acesta este un func\u021bional de baz\u0103, dar \u00een 8.2, din p\u0103cate, nu exist\u0103 o astfel de posibilitate.<\/p>\n<\/li>\n<li>\n<p>Dac\u0103 actualizarea din orice motiv nu este posibil\u0103, pentru versiunile software Spectrum Virtualize anterioare versiunilor 8.2.1.9 \u0219i 8.3.1.0 (unde bug-ul descris mai sus este relevant), pentru a reduce riscul apari\u021biei acestuia, suportul tehnic IBM recomand\u0103 limitarea performan\u021bei sistemului la nivelul pool-ului, a\u0219a cum este prezentat \u00een figura de mai jos (captura este realizat\u0103 \u00een varianta localizat\u0103 a GUI-ului). Valoarea de 10000 IOPS este afi\u0219at\u0103 ca exemplu \u0219i este aleas\u0103 conform specifica\u021biilor sistemului dumneavoastr\u0103.<\/p>\n<\/li>\n<\/ul>\n<p><img decoding=\"async\" alt=\"De ce este important s\u0103 verifica\u021bi software-ul pe sistemul dumneavoastr\u0103 de stocare de date cu \u00eenalt\u0103 disponibilitate (99,9999%)\" src=\"\/wp-content\/uploads\/2020\/10\/74eecdf918c10f61431c2d0f2d462883.png\" style=\"display:block;margin: 0 auto;\" \/>Limitarea performan\u021bei sistemului de stocare IBM<\/p>\n<ul>\n<li>\n<p>Este necesar s\u0103 se calculeze corect \u00eenc\u0103rc\u0103tura pe sistemele de stocare \u0219i s\u0103 se evite supra\u00eenc\u0103rcarea. Pentru aceasta, se poate folosi fie dimensionalul IBM (dac\u0103 exist\u0103 acces la acesta), fie ajutorul partenerilor, fie resurse externe. Este esen\u021bial s\u0103 se \u00een\u021beleag\u0103 profilul \u00eenc\u0103rc\u0103rii pe sistemul de stocare, deoarece performan\u021ba \u00een MB\/s \u0219i IOPS variaz\u0103 considerabil \u00een func\u021bie de cel pu\u021bin urm\u0103toarele parametrii:<\/p>\n<ul>\n<li>\n<p>tipul de opera\u021biune: citire sau scriere,<\/p>\n<\/li>\n<li>\n<p>dimensiunea blocului de opera\u021biune,<\/p>\n<\/li>\n<li>\n<p>raportul procentual al opera\u021biunilor de citire \u0219i scriere \u00een fluxul general de intrare-ie\u0219ire.<\/p>\n<\/li>\n<\/ul>\n<p>De asemenea, viteza de execu\u021bie a opera\u021biunilor este influen\u021bat\u0103 de modul \u00een care sunt citite blocurile de date: secven\u021bial sau aleatoriu. Atunci c\u00e2nd se execut\u0103 mai multe opera\u021biuni de acces la date din partea aplica\u021biei exist\u0103 conceptul de opera\u021biuni dependente. Acest lucru este de dorit s\u0103 fie luat \u00een considerare. Tot ce acestea pot ajuta s\u0103 vedem ansamblul datelor de la contoarele de performan\u021b\u0103 ale sistemului de operare, sistemului de stocare, serverelor\/hypervisors, precum \u0219i \u00een\u021belegerea particularit\u0103\u021bilor de func\u021bionare a aplica\u021biilor, DBMS-urilor \u0219i altor \u201econsumatori\u201d de resurse disco.<\/p>\n<\/li>\n<li>\n<p>\u0218i nu \u00een ultimul r\u00e2nd, este esen\u021bial s\u0103 ave\u021bi copii de rezerv\u0103 \u00een stare actual\u0103 \u0219i de lucru. Programul de backup trebuie s\u0103 fie configurat \u00een func\u021bie de valorile RPO acceptabile pentru afacere \u0219i s\u0103 se verifice periodic integritatea copiilor de rezerv\u0103 (multe dintre produsele software pentru backup au implementat \u00een produsele lor o verificare automatizat\u0103) pentru a asigura o valoare acceptabil\u0103 a RTO. <\/p>\n<\/li>\n<\/ul>\n<p>V\u0103 mul\u021bumim c\u0103 a\u021bi citit p\u00e2n\u0103 la cap\u0103t. <br \/>Suntem preg\u0103ti\u021bi s\u0103 r\u0103spundem la \u00eentreb\u0103rile \u0219i comentariile dumneavoastr\u0103 \u00een comentarii. De asemenea,<noindex><a rel=\"nofollow\" href=\"https:\/\/bit.ly\/2SvSm2h\"> v\u0103 invit\u0103m s\u0103 v\u0103 abona\u021bi la canalul nostru de Telegram.<\/a><\/noindex>, \u00een care organiz\u0103m regulat promo\u021bii (reduceri pentru IaaS \u0219i tombole cu coduri promo\u021bionale de p\u00e2n\u0103 la 100% pentru VPS), public\u0103m \u0219tiri interesante \u0219i anun\u021b\u0103m articole noi pe blogul Habr. <\/p>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/mclouds\/blog\/521500\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u0430\u043a\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f \u043f\u0440\u043e\u0448\u0438\u0432\u043a\u0438 \u0441\u0430\u043c\u0430\u044f \u201c\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u0430\u044f\u201d \u0438 \u201c\u0440\u0430\u0431\u043e\u0447\u0430\u044f\u201d? \u0415\u0441\u043b\u0438 \u0421\u0425\u0414 \u0433\u0430\u0440\u0430\u043d\u0442\u0438\u0440\u0443\u0435\u0442 \u043e\u0442\u043a\u0430\u0437\u043e\u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u043e\u0441\u0442\u044c \u043d\u0430 99,9999%, \u0442\u043e \u0437\u043d\u0430\u0447\u0438\u0442 \u043b\u0438, \u0447\u0442\u043e \u0438 \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u043e\u043d\u0430 \u0431\u0443\u0434\u0435\u0442 \u0431\u0435\u0441\u043f\u0435\u0440\u0435\u0431\u043e\u0439\u043d\u043e \u0434\u0430\u0436\u0435 \u0431\u0435\u0437 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u041f\u041e? \u0418\u043b\u0438 \u043d\u0430\u043e\u0431\u043e\u0440\u043e\u0442 \u0434\u043b\u044f \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044f \u043c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e\u0439 \u043e\u0442\u043a\u0430\u0437\u043e\u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u043e\u0441\u0442\u0438 \u043d\u0443\u0436\u043d\u043e \u0432\u0441\u0435\u0433\u0434\u0430 \u0441\u0442\u0430\u0432\u0438\u0442\u044c \u0441\u0430\u043c\u0443\u044e \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u044e\u044e \u043f\u0440\u043e\u0448\u0438\u0432\u043a\u0443?&nbsp; \u041f\u043e\u0441\u0442\u0430\u0440\u0430\u0435\u043c\u0441\u044f \u043e\u0442\u0432\u0435\u0442\u0438\u0442\u044c \u043d\u0430 \u044d\u0442\u0438 \u0432\u043e\u043f\u0440\u043e\u0441\u044b, \u043e\u043f\u0438\u0440\u0430\u044f\u0441\u044c \u043d\u0430 \u043d\u0430\u0448 \u043e\u043f\u044b\u0442. \u041d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u0435 \u0432\u0432\u0435\u0434\u0435\u043d\u0438\u0435 \u0412\u0441\u0435 \u043c\u044b \u043f\u043e\u043d\u0438\u043c\u0430\u0435\u043c, \u0447\u0442\u043e \u0432 \u043a\u0430\u0436\u0434\u043e\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":95871,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-95870","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041a\u0430\u043a\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f \u043f\u0440\u043e\u0448\u0438\u0432\u043a\u0438.\" \/>\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\/ro\/blog\/administrirovanie\/pochemu-vazhno-proverit-po-na-vashej-shd-vysokoj-dostupnosti-999999\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO 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