{"id":31305,"date":"2019-10-31T21:40:34","date_gmt":"2019-10-31T18:40:34","guid":{"rendered":"https:\/\/prohoster.info\/blog\/realizatsiya-ssd-keshirovaniya-v-shd-qsan-xcubesan\/"},"modified":"2019-10-31T21:40:34","modified_gmt":"2019-10-31T18:40:34","slug":"realizatsiya-ssd-keshirovaniya-v-shd-qsan-xcubesan","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/administrirovanie\/realizatsiya-ssd-keshirovaniya-v-shd-qsan-xcubesan","title":{"rendered":"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Tehnologiile de cre\u0219tere a performan\u021bei, bazate pe utilizarea SSD-urilor \u0219i utilizate pe scar\u0103 larg\u0103 \u00een stocarea datelor, au fost inventate cu mult timp \u00een urm\u0103. \u00cen primul r\u00e2nd, aceasta este utilizarea SSD-urilor ca spa\u021biu de stocare, ceea ce este 100% eficient, dar costisitor. Din acest motiv, sunt folosite tehnologiile de tiering \u0219i caching, unde SSD-urile sunt utilizate doar pentru cele mai solicitate (\u201efierbin\u021bi\u201d) date. Tieringul este bun pentru scenarii de utilizare pe termen lung (zile-s\u0103pt\u0103m\u00e2ni) ale datelor \u201efierbin\u021bi\u201d. Cachingul, pe de alt\u0103 parte, este destinat utiliz\u0103rii pe termen scurt (minute-ore). Ambele variante sunt implementate \u00een stocarea datelor. <noindex><a rel=\"nofollow\" href=\"http:\/\/www.qsan.su\/goods\/sistemyi-xraneniya-dannyix\/\">QSAN XCubeSAN<\/a><\/noindex>. \u00cen acest articol, vom analiza implementarea celui de-al doilea algoritm \u2013 <noindex><a rel=\"nofollow\" href=\"http:\/\/www.qsan.su\/soft\/san-os-4.0\/ssd-keshirovanie-(qcache-2.0).html\">caching SSD<\/a><\/noindex>.<\/p>\n<p>\n<img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/e2e97119a949509f4a3fe8e17a4238ac.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p>Esenta tehnologiei de caching SSD const\u0103 \u00een utilizarea SSD-ului ca memorie cache intermediar\u0103 \u00eentre hard disk-uri \u0219i memoria RAM a controlerului. Performan\u021ba SSD-ului este, desigur, mai mic\u0103 dec\u00e2t performan\u021ba memoriei cache a controlerului, dar \u00een schimb, capacitatea este cu un ordin mai mare. Prin urmare, ob\u021binem un anumit compromis \u00eentre vitez\u0103 \u0219i capacitate.<\/p>\n<p><\/p>\n<p><b>Indica\u021biile pentru utilizarea SSD-ului ca cache pentru citire sunt:<\/b><\/p>\n<p><\/p>\n<ul>\n<li>Predominan\u021ba opera\u021biunilor de citire fa\u021b\u0103 de opera\u021biunile de scriere (de obicei caracteristic pentru baze de date \u0219i aplica\u021bii web);<\/li>\n<li>Existenta unui punct de congestie \u00een ceea ce prive\u0219te performan\u021ba array-ului de hard disk-uri;<\/li>\n<li>Volumul datelor solicitate este mai mic dec\u00e2t capacitatea SSD-ului de cache.<\/li>\n<\/ul>\n<p><\/p>\n<p>Indica\u021biile pentru utilizarea SSD-ului ca cache pentru citire+scriere sunt acelea\u0219i, cu excep\u021bia tipului de opera\u021biuni - tip mixt (de exemplu, server de fi\u0219iere).<\/p>\n<p><\/p>\n<p>Majoritatea furnizorilor de stocare a datelor utilizeaz\u0103 \u00een produsele lor SSD-uri ca cache doar pentru opera\u021biunile de citire. Diferen\u021ba principal\u0103 <noindex><a rel=\"nofollow\" href=\"http:\/\/www.qsan.su\/\">QSAN <\/a><\/noindex>fa\u021b\u0103 de ace\u0219tia este posibilitatea de a folosi cache-ul \u0219i pentru scriere. Pentru a activa func\u021bionalitatea de caching SSD \u00een stocarea datelor QSAN, este necesar\u0103 achizi\u021bionarea unei licen\u021be separate (furnizat\u0103 \u00een format electronic).<\/p>\n<p><\/p>\n<p>Cache SSD \u00een XCubeSAN este implementat fizic sub form\u0103 de grupuri separate de SSD pentru cache. Sistemul poate avea p\u00e2n\u0103 la patru astfel de grupuri. Fiecare grup, desigur, folose\u0219te propriul s\u0103u set de SSD-uri. \u00cen propriet\u0103\u021bile discului virtual, definim dac\u0103 va utiliza grupul de cache \u0219i care anume. Activarea \u0219i dezactivarea utiliz\u0103rii cache-ului pentru volume se poate face \u00een mod online, f\u0103r\u0103 a opri intr\u0103rile sau ie\u0219irile. De asemenea, SSD-uri pot fi ad\u0103ugate sau eliminate din grup \u00een mod 'hot'. La crearea grupului de cache SSD, este necesar s\u0103 alegem \u00een ce mod va func\u021biona: doar citire sau citire + scriere. Acest lucru afecteaz\u0103 organizarea sa fizic\u0103. Deoarece pot exista mai multe grupuri de cache, acestea pot avea func\u021bionalit\u0103\u021bi diferite (adic\u0103 sistemul poate avea simultan grupuri de cache pentru citire \u0219i pentru citire + scriere).<\/p>\n<p><\/p>\n<p>\u00cen cazul utiliz\u0103rii grupului de cache doar pentru citire, acesta poate consta din 1-8 SSD-uri. Discile nu trebuie neap\u0103rat s\u0103 fie de aceea\u0219i capacitate \u0219i acela\u0219i furnizor, deoarece sunt unite \u00eentr-o structur\u0103 NRAID+. Toate SSD-urile din grup sunt utilizate \u00eempreun\u0103. Sistemul \u00eencearc\u0103 s\u0103 paralelizeze cererile primite \u00eentre toate SSD-urile pentru a atinge o performan\u021b\u0103 maxim\u0103. \u00cen cazul \u00een care unul dintre SSD-uri e\u0219ueaz\u0103, nu se va \u00eent\u00e2mpla nimic grav: cache-ul con\u021bine doar o copie a datelor stocate pe matricea de hard disk-uri. Pur \u0219i simplu, volumul de cache SSD disponibil se va mic\u0219ora (sau va deveni zero \u00een cazul utiliz\u0103rii ini\u021biale a cache-ului SSD dintr-un singur dispozitiv).<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/1e592445ff41335c844e0a47b2e664c3.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Dac\u0103 cache-ul este utilizat pentru opera\u021biuni de citire + scriere, num\u0103rul de SSD-uri din grup trebuie s\u0103 fie un multiplu de doi, deoarece con\u021binutul este mirroring pe perechi de dispozitive (se folose\u0219te structura NRAID 1+). Duplicarea cache-ului este necesar\u0103 deoarece poate con\u021bine date care nu s-au scris \u00eenc\u0103 pe hard disk-uri. \u00cen acest caz, e\u0219ecul unui SSD din grupul de cache ar duce la pierderea informa\u021biei. \u00cen cazul NRAID 1+, e\u0219ecul unui SSD va duce pur \u0219i simplu la trecerea cache-ului \u00een starea de func\u021bionare \"doar pentru citire\", cu resetarea datelor nescrise pe matricea de hard disk-uri. Dup\u0103 \u00eenlocuirea SSD-ului defect, cache-ul va reveni la modul s\u0103u ini\u021bial de func\u021bionare. Apropo, pentru o mai mare siguran\u021b\u0103, unui cache care func\u021bioneaz\u0103 pe citire + scriere i se pot aloca SSD-uri hot spare dedicate.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/61c6ba4b29ab31c3ded112b12f8103ce.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>\u00cen utilizarea func\u021biei de caching SSD \u00een XCubeSAN, exist\u0103 o serie de cerin\u021be privind volumul de memorie al controlerelor de stocare: cu c\u00e2t memoria de sistem este mai mare, cu at\u00e2t un volum mai mare de pool de cache va fi disponibil.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/40da0dba6094c55adaa54b8d9cbc1bcd.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Spre deosebire de majoritatea produc\u0103torilor de stocare, care ofer\u0103 doar op\u021biunea de activare\/dezactivare a caching-ului SSD, QSAN ofer\u0103 mai multe op\u021biuni. \u00cen special, pute\u021bi alege modul de func\u021bionare al cache-ului \u00een func\u021bie de tipul de sarcin\u0103. Exist\u0103 trei \u0219abloane presetate, cele mai apropiate de serviciile corespunz\u0103toare: baza de date, sistem de fi\u0219iere, serviciu web. \u00cen plus, administratorul poate crea propriul profil specific\u00e2nd valorile dorite ale parametrilor: <\/p>\n<p><\/p>\n<ul>\n<li>Dimensiunea blocului (Cache Block Size) \u2013 1\/2\/4 MB<\/li>\n<li>Num\u0103rul de cereri de citire a blocului, astfel \u00eenc\u00e2t acesta s\u0103 fie copiat \u00een cache (Populate-on-Read Threshold) \u2013 1..4<\/li>\n<li>Num\u0103rul de cereri de scriere a blocului, astfel \u00eenc\u00e2t acesta s\u0103 fie copiat \u00een cache (Populate-on-Write Threshold) \u2013 0..4<\/li>\n<\/ul>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/b584e87c4b067ac06a4b78063007f31f.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Profilurile pot fi schimbate \"din mers\", dar, desigur, cu resetarea con\u021binutului cache-ului \u0219i re\u00eenc\u0103lzirea acestuia.<\/p>\n<p><\/p>\n<p>Consider\u00e2nd principiul de func\u021bionare al caching-ului SSD, putem eviden\u021bia principalele opera\u021biuni \u00een utilizarea acestuia:<\/p>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"#1\">Citirea datelor atunci c\u00e2nd acestea nu sunt disponibile \u00een cache;<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"#2\">Citirea datelor atunci c\u00e2nd acestea sunt prezente \u00een cache;<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"#3\">Scrierea datelor folosind cache-ul pentru citire;<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"#4\">Scrierea datelor folosind cache-ul pentru citire + scriere.<\/a><\/noindex><\/li>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"1\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/c9f70934f1d9bed5ad60c716bcd3ed30.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><i>Citirea datelor atunci c\u00e2nd acestea nu sunt disponibile \u00een cache<\/i><\/p>\n<p><\/p>\n<ol>\n<li>Cererea de la host ajunge la controler;<\/li>\n<li>Deoarece datele solicitate nu sunt \u00een cache-ul SSD, acestea sunt citite de pe hard disk-uri;<\/li>\n<li>Datele citite sunt trimise la host. \u00cen acela\u0219i timp, se verific\u0103 dac\u0103 aceste blocuri sunt \"fierbin\u021bi\";<\/li>\n<li>Dac\u0103 da, acestea sunt copiate \u00een cache-ul SSD pentru utilizare ulterioar\u0103.<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"2\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/9eac4b4cf003fb310101b3981dfed177.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><i>Citirea datelor atunci c\u00e2nd acestea sunt prezente \u00een cache<\/i><\/p>\n<p><\/p>\n<ol>\n<li>Cererea de la host ajunge la controler;<\/li>\n<li>Deoarece datele solicitate sunt \u00een cache-ul SSD, acestea sunt citite de acolo;<\/li>\n<li>Datele citite sunt trimise la host.<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"3\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/ae1f52f5882f19916f0b49b0619dae41.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><i>Scrierea datelor folosind cache-ul pentru citire <\/i><\/p>\n<p><\/p>\n<ol>\n<li>Cererea de scriere de la host ajunge la controler;<\/li>\n<li>Datele sunt scrise pe hard disk-uri;<\/li>\n<li>Hostului i se trimite un r\u0103spuns privind scrierea de succes;<\/li>\n<li>\u00cen acela\u0219i timp, se verific\u0103 dac\u0103 blocul este \"fierbinte\" (se compar\u0103 parametrul Populate-on-Write Threshold). Dac\u0103 da, acesta este copiat \u00een cache-ul SSD pentru utilizare ulterioar\u0103.<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"4\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/b69debdc836e3c1d93f64aa8724dd322.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><i>Scrierea datelor folosind cache-ul pentru citire+scriere<\/i><\/p>\n<p><\/p>\n<ol>\n<li>Cererea de scriere de la host ajunge la controler;<\/li>\n<li>Datele sunt scrise \u00een cache-ul SSD;<\/li>\n<li>Hostului i se trimite un r\u0103spuns privind scrierea de succes;<\/li>\n<li>Datele din cache-ul SSD sunt scrise \u00een fundal pe hard disk-uri;<\/li>\n<\/ol>\n<h2>Verificare \u00een practic\u0103 <\/h2>\n<p>\n<b class=\"spoiler_title\">Banc de testare<\/b><\/p>\n<p>2 servere (CPU: 2 x Xeon E5-2620v3 2.4GHz \/ RAM: 32GB) sunt conectate prin dou\u0103 porturi direct la sistemul de stocare XCubeSAN XS5224D (16GB RAM \/ controller) prin Fibre Channel 16G.<\/p>\n<p><\/p>\n<p>Au fost utilizate 16 x Seagate Constellation ES, ST500NM0001, 500GB, SAS 6Gb\/s, combinate \u00een RAID5 (15+1) pentru matricea de date \u0219i 8 x HGST Ultrastar SSD800MH.B, HUSMH8010BSS200, 100GB, SAS 12Gb\/s ca cache.<\/p>\n<p><\/p>\n<p>Au fost create 2 volume: c\u00e2te unul pentru fiecare server. <\/p>\n<h3>Test 1. Cache SSD doar pentru citire cu 1-8 SSD-uri<\/h3>\n<p><\/p>\n<p><b>Cache SSD<\/b><\/p>\n<p><\/p>\n<ul>\n<li>Tip I\/O: Personalizare<\/li>\n<li>Dimensiunea blocului de cache: 4MB<\/li>\n<li><b>Prag de populare la citire: 1<\/b><\/li>\n<li>Prag de populare la scriere: 0<\/li>\n<\/ul>\n<p><b>Tipar I\/O<\/b> <\/p>\n<p><\/p>\n<ul>\n<li>Instrument: IOmeter V1.1.0<\/li>\n<li>Lucr\u0103tori: 1<\/li>\n<li>Outstanding (Ad\u00e2ncimea cozii): 128<\/li>\n<li><b>Specifica\u021bii de acces: 4KB, 100% citire, 100% aleatorie<\/b><\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/6d9f4d3912d066662067fba52eb0e938.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/665aa2f35d5d78bdb4a128eaea55faf2.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>\u00cen teorie, cu c\u00e2t sunt mai multe SSD-uri \u00een pool-ul de cache, cu at\u00e2t performan\u021ba este mai ridicat\u0103. \u00cen practic\u0103, acest lucru s-a confirmat. Singura excep\u021bie este c\u0103 o cre\u0219tere semnificativ\u0103 a num\u0103rului de SSD-uri cu un num\u0103r mic de volume nu conduce la un efect exploziv. <\/p>\n<p><\/p>\n<h3>Test 2. Cache SSD \u00een modul citire + scriere cu 2-8 SSD-uri<\/h3>\n<p><\/p>\n<p><b>Cache SSD<\/b><\/p>\n<p><\/p>\n<ul>\n<li> Tip I\/O: Personalizare<\/li>\n<li>Dimensiunea blocului de cache: 4MB<\/li>\n<li>Prag de populare la citire: 1<\/li>\n<li><b>Prag de populare la scriere: 1 <\/b><\/li>\n<\/ul>\n<p><b>Tipar I\/O<\/b> <\/p>\n<p><\/p>\n<ul>\n<li>Instrument: IOmeter V1.1.0<\/li>\n<li>Lucr\u0103tori: 1<\/li>\n<li>Outstanding (Ad\u00e2ncimea cozii): 128<\/li>\n<li><b>Specifica\u021bii de acces: 4KB, 100% scriere, 100% aleatorie <\/b><\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/6177fe7ef2c74045d760ba94598acb34.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/2e1f749b827d43dd3fa8dcd33243bd9e.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Acela\u0219i rezultat: o cre\u0219tere exploziv\u0103 a performan\u021bei \u0219i scalabilitate la cre\u0219terea num\u0103rului de SSD-uri.<\/p>\n<p><\/p>\n<p>\u00cen ambele teste, volumul de date de lucru a fost mai mic dec\u00e2t volumul total al cache-ului. De aceea, \u00een timp, toate blocurile au fost copiate \u00een cache. Lucrul s-a desf\u0103\u0219urat practic cu SSD-uri, f\u0103r\u0103 a afecta semnificativ hard disk-urile. Scopul acestor teste a fost de a demonstra eficien\u021ba \u00eenc\u0103lzirii cache-ului \u0219i scalabilitatea performan\u021bei sale \u00een func\u021bie de num\u0103rul de SSD-uri.<\/p>\n<p><\/p>\n<p>Acum s\u0103 revenim cu picioarele pe p\u0103m\u00e2nt \u0219i s\u0103 verific\u0103m o situa\u021bie mai real\u0103, \u00een care volumul de date este mai mare dec\u00e2t dimensiunea cache-ului. Pentru ca testul s\u0103 dureze un timp rezonabil (timpul de \u201e\u00eenc\u0103lzire\u201d a cache-ului cre\u0219te semnificativ cu dimensierea volumului), ne vom limita la dimensiunea unui volum de 120GB. <\/p>\n<p><\/p>\n<h3>Test 3. Emularea func\u021bion\u0103rii unei baze de date <\/h3>\n<p><\/p>\n<p><b>Cache SSD<\/b><\/p>\n<p><\/p>\n<ul>\n<li> <b>Tip I\/O: Baz\u0103 de date<\/b><\/li>\n<li>Dimensiunea blocului de cache: 1MB<\/li>\n<li>Prag de populare la citire: 2<\/li>\n<li>Prag de populare la scriere: 1 <\/li>\n<\/ul>\n<p><b>Tipar I\/O<\/b> <\/p>\n<p><\/p>\n<ul>\n<li>Instrument: IOmeter V1.1.0<\/li>\n<li>Lucr\u0103tori: 1<\/li>\n<li>Outstanding (Ad\u00e2ncimea cozii): 128<\/li>\n<li><b>Specifica\u021bii de acces: 8KB, 67% citire, 100% aleatorie<\/b><\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Implementarea caching-ului SSD \u00een sistemele de stocare QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/949b9fc604cf3a932ebf308d19fc9ff1.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<h2>Verdict <\/h2>\n<p><\/p>\n<blockquote><p>Ca o concluzie evident\u0103, se impune o eficien\u021b\u0103 bun\u0103 a utiliz\u0103rii cache-ului SSD pentru \u00eembun\u0103t\u0103\u021birea performan\u021bei oric\u0103rui sistem de stocare. <noindex><a rel=\"nofollow\" href=\"http:\/\/www.qsan.su\/goods\/sistemyi-xraneniya-dannyix\/\">QSAN XCubeSAN<\/a><\/noindex> Aceast\u0103 afirma\u021bie se aplic\u0103 pe deplin: func\u021bia de caching SSD este implementat\u0103 excelent. Aceasta se refer\u0103 la suportul pentru modurile de citire \u0219i citire + scriere, la configurarea flexibil\u0103 a oper\u0103rii pentru orice scenarii de utilizare, precum \u0219i la performan\u021ba final\u0103 a sistemului \u00een ansamblu. Prin urmare, pentru un cost foarte rezonabil (pre\u021bul licen\u021bei este comparabil cu costul a 1-2 SSD-uri), se poate \u00eembun\u0103t\u0103\u021bi semnificativ performan\u021ba general\u0103.<\/p><\/blockquote>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/skilline\/blog\/432366\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0422\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438, \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 SSD \u0438 \u0448\u0438\u0440\u043e\u043a\u043e \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0435 \u0432 \u0421\u0425\u0414, \u0443\u0436\u0435 \u0434\u0430\u0432\u043d\u043e \u0438\u0437\u043e\u0431\u0440\u0435\u0442\u0435\u043d\u044b. \u041f\u0440\u0435\u0436\u0434\u0435 \u0432\u0441\u0435\u0433\u043e \u2013 \u044d\u0442\u043e \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435 SSD \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0430 \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f, \u0447\u0442\u043e \u043d\u0430 100% \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e, \u043d\u043e \u0434\u043e\u0440\u043e\u0433\u043e. \u041f\u043e\u044d\u0442\u043e\u043c\u0443 \u0432 \u0445\u043e\u0434 \u0438\u0434\u0443\u0442 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u0442\u0438\u0440\u0438\u043d\u0433\u0430 \u0438 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f, \u0433\u0434\u0435 SSD \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0434\u043b\u044f \u043d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u0432\u043e\u0441\u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u043d\u044b\u0445 (\u00ab\u0433\u043e\u0440\u044f\u0447\u0438\u0445\u00bb) \u0434\u0430\u043d\u043d\u044b\u0445. \u0422\u0438\u0440\u0438\u043d\u0433 \u0445\u043e\u0440\u043e\u0448 \u0434\u043b\u044f \u0441\u0446\u0435\u043d\u0430\u0440\u0438\u0435\u0432 \u0434\u043e\u043b\u0433\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0433\u043e (\u0434\u043d\u0438-\u043d\u0435\u0434\u0435\u043b\u0438) \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f 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