{"id":39097,"date":"2019-10-31T22:27:50","date_gmt":"2019-10-31T19:27:50","guid":{"rendered":"https:\/\/prohoster.info\/blog\/po-vashim-zayavkam-professionalnyj-test-ssd-nakopitelej-kingston-dc500r-i-dc500m\/"},"modified":"2019-10-31T22:27:50","modified_gmt":"2019-10-31T19:27:50","slug":"po-vashim-zayavkam-professionalnyj-test-ssd-nakopitelej-kingston-dc500r-i-dc500m","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/administrirovanie\/po-vashim-zayavkam-professionalnyj-test-ssd-nakopitelej-kingston-dc500r-i-dc500m","title":{"rendered":"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A\u021bi cerut exemple reale de utilizare a SSD-urilor noastre corporative \u0219i teste profesionale. V\u0103 prezent\u0103m o revizuire detaliat\u0103 a SSD-urilor noastre <noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrKingstonTruesystem\">Kingston DC500R \u0219i DC500M<\/a><\/noindex> de la partenerul nostru Truesystems. Exper\u021bii Truesystems au construit un server real \u0219i au simulat sarcini reale cu care se confrunt\u0103 toate unit\u0103\u021bile de stocare SSD de clas\u0103 corporativ\u0103. S\u0103 vedem ce au descoperit!<\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/2d2d75d35a611f328d59607a8b282b17.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>Gama de modele Kingston din 2019<\/h2>\n<p>\n\u00cencepem cu c\u00e2teva informa\u021bii teoretice. Toate SSD-urile Kingston pot fi \u00eemp\u0103r\u021bite \u00een patru mari grupuri. \u00cemp\u0103r\u021birea este conven\u021bional\u0103, deoarece acelea\u0219i unit\u0103\u021bi se \u00eencadreaz\u0103 \u00een mai multe familii.<\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrMainPage\">SSD-uri pentru integratori de sisteme:<\/a><\/noindex> SATA SSD \u00een formate de 2,5\u2033, M.2 \u0219i mSATA, Kingston UV500, \u0219i dou\u0103 modele de unit\u0103\u021bi cu interfa\u021b\u0103 NVMe \u2014 Kingston A1000 \u0219i Kingston KC2000;<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrKingstonSSD\">SSD-uri pentru utilizatori<\/a><\/noindex>. Acelea\u0219i modele ca \u0219i \u00een grupul anterior \u0219i, \u00een plus, SSD-ul SATA Kingston A400;<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrKingstonForCompanies\">SSD-uri pentru companii<\/a><\/noindex>: UV500 \u0219i KC2000;<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrForSystem\">SSD-uri corporative<\/a><\/noindex>. Unit\u0103\u021bi din seria DC500, care au devenit eroii acestei recenziei. Gama DC500 este \u00eemp\u0103r\u021bit\u0103 \u00een DC500R (preferin\u021b\u0103 de citire, 0,5 DWPD) \u0219i DC500M (sarcini mixte, 1,3 DWPD). <\/li>\n<\/ul>\n<p>\nLa testele Truesystems au fost utilizate Kingston DC500R cu o capacitate de 960 GB \u0219i Kingston DC500M cu 1920 GB memorie. S\u0103 ne re\u00eemprosp\u0103t\u0103m memoria cu specifica\u021biile lor:<\/p>\n<p><b>Kingston DC500R<\/b><\/p>\n<ul>\n<li>Capacitate: 480, 960, 1920, 3840 GB<\/li>\n<li>Format: 2,5\u2033, \u00een\u0103l\u021bime 7 mm<\/li>\n<li>Interfa\u021b\u0103: SATA 3.0, 6 Gbit\/s<\/li>\n<li>Performan\u021b\u0103 declarat\u0103 (pentru modelul de 960 GB)<\/li>\n<li>Acces secven\u021bial: citire \u2014 555 MB\/s, scriere \u2014 525 MB\/s<\/li>\n<li>Acces aleator (bloc de 4 KB): citire \u2014 98\u2009000 IOPS, scriere \u2014 20\u2009000 IOPS<\/li>\n<li>QoS laten\u021be (bloc de 4 KB, QD=1, percentil 99,9%): citire \u2014 500 \u00b5s, scriere \u2014 2 ms<\/li>\n<li>Dimensiune sector emulat\u0103: 512 bytes (logic\u0103\/fizic\u0103)<\/li>\n<li>Resurs\u0103: 0,5 DWPD<\/li>\n<li>Perioad\u0103 de garan\u021bie: 5 ani<\/li>\n<\/ul>\n<p>\n<b>Kingston DC500M<\/b><\/p>\n<ul>\n<li>Capacitate: 480, 960, 1920, 3840 GB<\/li>\n<li>Format: 2,5\u2033, \u00een\u0103l\u021bime 7 mm<\/li>\n<li>Interfa\u021b\u0103: SATA 3.0, 6 Gbit\/s<\/li>\n<li>Performan\u021b\u0103 declarat\u0103 (pentru modelul de 1920 GB)<\/li>\n<li>Acces secven\u021bial: citire \u2014 555 MB\/s, scriere \u2014 520 MB\/s<\/li>\n<li>Acces aleator (bloc de 4 KB): citire \u2014 98\u2009000 IOPS, scriere \u2014 75\u2009000 IOPS<\/li>\n<li>QoS laten\u021be (bloc de 4 KB, QD=1, percentil 99,9%): citire \u2014 500 \u00b5s, scriere \u2014 2 ms<\/li>\n<li>Dimensiune sector emulat\u0103: 512 bytes (logic\u0103\/fizic\u0103)<\/li>\n<li>Resurs\u0103: 1,3 DWPD<\/li>\n<li>Perioad\u0103 de garan\u021bie: 5 ani<\/li>\n<\/ul>\n<p>\nExper\u021bii Truesystems au observat c\u0103 \u00een unit\u0103\u021bile Kingston se specific\u0103 valorile QoS ale laten\u021bei totale ca fiind valoarea maxim\u0103 pe percentila 99,9% (99,9% dintre toate valorile vor fi mai mici dec\u00e2t valoarea specificat\u0103). Aceasta este o metric\u0103 foarte important\u0103, \u00een special pentru unit\u0103\u021bile de stocare server, deoarece acestea necesit\u0103 predictibilitate, stabilitate \u0219i absen\u021ba blocajelor nea\u0219teptate. Dac\u0103 \u0219ti\u021bi ce laten\u021be QoS sunt specificate \u00een specifica\u021bia unit\u0103\u021bii, pute\u021bi prognoza performan\u021ba acesteia, ceea ce este foarte convenabil.<\/p>\n<h2>Parametrii test\u0103rii<\/h2>\n<p>\nAmbele unit\u0103\u021bi de stocare au fost testate \u00eentr-un banc de testare care imit\u0103 un server. Caracteristicile sale:<\/p>\n<ul>\n<li>Procesor Intel Xeon E5-2620 V4 (8 nuclei, 2,1 GHz, HT activat)<\/li>\n<li>32 GB memorie<\/li>\n<li>Placa de baz\u0103 Supermicro X10SRi-F (1x socket R3, Intel C612)<\/li>\n<li>CentOS Linux 7.6.1810<\/li>\n<li>Pentru generarea sarcinii s-a folosit FIO versiunea 3.14<\/li>\n<\/ul>\n<p>\n\u0218i \u00eenc\u0103 o dat\u0103 despre unit\u0103\u021bile SSD testate:<\/p>\n<ul>\n<li>Kingston DC500R 960 GB (SEDC500R960G)<\/li>\n<li>Firmware: SCEKJ2.3<\/li>\n<li>Volum: 960\u2009197\u2009124\u2009096 octe\u021bi<\/li>\n<li>Kingston DC500M 1920 GB (SEDC500M1920G)<\/li>\n<li>Firmware: SCEKJ2.3<\/li>\n<li>Volum: 1\u2009920\u2009383\u2009410\u2009176 octe\u021bi <\/li>\n<\/ul>\n<p><\/p>\n<h2>Metodologia de testare<\/h2>\n<p>\nS-a bazat pe un set popular de teste <noindex><a rel=\"nofollow\" href=\"http:\/\/www.snia.org\/tech_activities\/standards\/curr_standards\/pts\">SNIA Solid State Storage Performance Test Specification v2.0.1<\/a><\/noindex>, totu\u0219i, evaluatorii au adus modific\u0103ri pentru a face sarcinile mai apropiate de utilizarea real\u0103 a SSD-urilor corporative \u00een 2019. \u00cen descrierea fiec\u0103rui test, vom men\u021biona ce anume a fost modificat \u0219i de ce.<\/p>\n<p><b>Testul opera\u021biunilor de intrare-ie\u0219ire (IOPS)<\/b><\/p>\n<p>\u00cen acest test se m\u0103soar\u0103 num\u0103rul de opera\u021biuni de intrare-ie\u0219ire pe secund\u0103 pentru blocuri de dimensiuni diferite (1024 KB, 128 KB, 64 KB, 32 KB, 16 KB, 8 KB, 4 KB, 0,5 KB) \u0219i acces aleatoriu cu diferite propor\u021bii citire\/scriere (100\/0, 95\/5, 65\/35, 50\/50, 35\/65, 5\/95, 0\/100). Exper\u021bii Truesystems au folosit urm\u0103toarele parametri de test: 16 fire cu ad\u00e2ncimea cozii de 8. Blocul de 0,5 KB (512 octe\u021bi) nu a fost rulat deloc, deoarece dimensiunea sa este prea mic\u0103 pentru a \u00eenc\u0103rca semnificativ unit\u0103\u021bile.<\/p>\n<p><b>Kingston DC500R \u00een testul IOPS<\/b><\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/2b169fc3c4f518cd2fec7aedabb9e9ff.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDatele din tabel:<\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/06adda8710c58aac284d1df263a828bc.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Kingston DC500M \u00een testul IOPS<\/b><\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/aaeb74ed5750163a845aa78241ab689b.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDatele din tabel:<\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/36e5235ca499073e28fdbdf39b8dda98.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTestul IOPS nu presupune atingerea modului de satura\u021bie, a\u0219a c\u0103 acesta trece destul de u\u0219or. Ambele unit\u0103\u021bi s-au descurcat excelent, respect\u00e2nd complet specifica\u021biile din fabric\u0103. Subiec\u021bii au demonstrat o performan\u021b\u0103 excelent\u0103 \u00een scrierea de blocuri de 4 KB: 70 \u0219i 88 de mii IOPS. Este impresionant, mai ales pentru Kingston DC500R, orientat c\u0103tre citire. C\u00e2t despre opera\u021biunile de citire, aceste SSD-uri nu numai c\u0103 dep\u0103\u0219esc valorile fabricate, dar se apropie \u00een general de plafonul de performan\u021b\u0103 al interfe\u021bei SATA.<\/p>\n<p><b>Testul l\u0103\u021bimii de band\u0103<\/b><\/p>\n<p>Acest test examineaz\u0103 l\u0103\u021bimea de band\u0103 \u00een acces secven\u021bial. Adic\u0103, ambele SSD-uri efectueaz\u0103 opera\u021biuni de citire \u0219i scriere secven\u021biale cu blocuri de 1 MB \u0219i 128 KB. 8 fire de execu\u021bie cu o ad\u00e2ncime a cozii de 16 pentru fiecare fir.<\/p>\n<p><b>Kingston DC500R:<\/b><\/p>\n<ul>\n<li>Citire secven\u021bial\u0103 128 KB: 539,81 MB\/s<\/li>\n<li>Scriere secven\u021bial\u0103 128 KB: 416,16 MB\/s<\/li>\n<li>Citire secven\u021bial\u0103 1 MB: 539,98 MB\/s<\/li>\n<li>Scriere secven\u021bial\u0103 1 MB: 425,18 MB\/s<\/li>\n<\/ul>\n<p>\n<b>Kingston DC500M:<\/b><\/p>\n<ul>\n<li>Citire secven\u021bial\u0103 128 KB: 539,27 MB\/s<\/li>\n<li>Scriere secven\u021bial\u0103 128 KB: 518,97 MB\/s<\/li>\n<li>Citire secven\u021bial\u0103 1 MB: 539,44 MB\/s<\/li>\n<li>Scriere secven\u021bial\u0103 1 MB: 518,48 MB\/s<\/li>\n<\/ul>\n<p>\n\u0218i aici observ\u0103m c\u0103 viteza de citire secven\u021bial\u0103 a SSD-ului s-a apropiat de limita l\u0103\u021bimii de band\u0103 a interfe\u021bei SATA 3. Nu au fost identificate probleme cu citirea secven\u021bial\u0103 a unit\u0103\u021bilor Kingston.<\/p>\n<p>Scrierea secven\u021bial\u0103 r\u0103m\u00e2ne oarecum \u00een urm\u0103, ceea ce se observ\u0103 \u00een special la Kingston DC500R, care este din clasa de citire intensiv\u0103, adic\u0103, destinat citirii intensive. Prin urmare, Kingston DC500R a ob\u021binut \u00een aceast\u0103 parte a testului valori chiar mai mici dec\u00e2t cele specificate. Totu\u0219i, exper\u021bii de la Truesystems consider\u0103 c\u0103 pentru o unitate care nu este deloc destinat\u0103 unor astfel de sarcini (s\u0103 ne amintim c\u0103 resursa la DC500R este de 0,5 DWPD), aceste 400 \u0219i ceva MB\/s pot fi considerate totu\u0219i un rezultat bun.<\/p>\n<h2>Testul laten\u021bei<\/h2>\n<p>\nA\u0219a cum am men\u021bionat anterior, acest test este extrem de important pentru unit\u0103\u021bile de stocare corporative. Prin intermediul acestuia, se pot identifica problemele care apar \u00een urma unei exploata\u021bii zilnice \u00eendelungate a unui SSD. \u00cen cadrul testului standard SNIA PTS se m\u0103soar\u0103 valoarea \u00eent\u00e2rzierii medii \u0219i maxime pentru diferite dimensiuni ale blocului (8 KB, 4 KB, 0,5 KB) \u0219i propor\u021bii de citire\/scriere (100\/0, 65\/35, 0\/100) la o ad\u00e2ncime minim\u0103 a cozii (1 fir cu QD=1). Totu\u0219i, \u00een redac\u021bia Truesystems s-a decis s\u0103 se revizuiasc\u0103 serios acest test pentru a ob\u021bine valori mai realiste:<\/p>\n<ul>\n<li>S-a exclus blocul de 0,5 KB;<\/li>\n<li>\u00cen locul sarcinii monofi\u015fice cu cozi de 1 \u0219i 32, sarcina variaz\u0103 \u00een func\u021bie de num\u0103rul de fire (1, 2, 4) \u0219i ad\u00e2ncimea cozii (1, 2, 4, 8, 16, 32);<\/li>\n<li>\u00cen locul propor\u021biei 65\/35, se folose\u0219te 70\/30, care este mai realist\u0103;<\/li>\n<li>Se prezint\u0103 nu doar valorile medii \u0219i maxime, ci \u0219i percentiles 99%, 99,9%;<\/li>\n<li>Pentru valoarea aleas\u0103 a num\u0103rului de fire, se construiesc graficele dependen\u021bei \u00eent\u00e2rzierii (99%, 99,9% \u0219i valoarea medie) de IOPS pentru toate blocurile \u0219i propor\u021biile de citire\/scriere.<\/li>\n<\/ul>\n<p>\nDatele au fost mediate pe patru din 25 de runde, fiecare av\u00e2nd o durat\u0103 de 35 de secunde (5 \u201eincalziri\u201d + o sarcin\u0103 de 30 de secunde). Pentru grafice, redac\u021bia Truesystems a ales o serie de valori cu ad\u00e2ncimea cozii de la 1 la 32 la 1-4 fire. Acest lucru a fost realizat pentru a evalua performan\u021ba unit\u0103\u021bilor de stocare \u021bin\u00e2nd cont de \u00eent\u00e2rzieri, adic\u0103 un indicator c\u00e2t mai realist.<\/p>\n<p><b>Indicatorii \u00eent\u00e2rzierii medii:<\/b><\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/fe81e9f1a5ba9aba29a1dc173f3b51ff.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nAcest grafic ilustreaz\u0103 diferen\u021ba dintre modelele DC500R \u0219i DC500M. Kingston DC500R este conceput pentru opera\u021biuni intensive de citire, astfel c\u0103 num\u0103rul opera\u021biunilor de scriere nu cre\u0219te aproape deloc cu cre\u0219terea sarcinii, r\u0103m\u00e2n\u00e2nd la nivelul de 25.000. <br \/>\nDac\u0103 ne uit\u0103m la o sarcin\u0103 mixt\u0103 (70% scriere \u0219i 30% citire), diferen\u021ba dintre DC500R \u0219i DC500M r\u0103m\u00e2ne, de asemenea, semnificativ\u0103. Dac\u0103 analiz\u0103m sarcina care corespunde unei \u00eent\u00e2rzieri de 400 microsecunde, se observ\u0103 c\u0103 DC500M, universal, are o performan\u021b\u0103 de trei ori mai mare. Acest lucru este, de asemenea, perfect natural \u0219i se bazeaz\u0103 pe specifica\u021biile unit\u0103\u021bilor de stocare.<br \/>\nUn detaliu interesant \u2014 DC500M dep\u0103\u0219e\u0219te DC500R chiar \u0219i la 100%-citire, oferind o \u00eent\u00e2rziere mai mic\u0103 la acela\u0219i num\u0103r de IOPS. Diferen\u021ba este mic\u0103, dar foarte interesant\u0103.<\/p>\n<p><b>Percentila 99% a \u00eent\u00e2rzierii:<\/b><\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/af5df1ef51a743dfc3325cdf9c962d38.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPercentila 99.9% a \u00eent\u00e2rzierii:<\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/c361c07b7ffba1c1793466ceb0b84473.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nConform acestor grafice, exper\u021bii Truesystems au verificat veridicitatea caracteristicilor declarate pentru QoS-ul \u00eent\u00e2rzierei. \u00cen specifica\u021bii s-a men\u021bionat o valoare de 0,5 ms pentru citire \u0219i 2 ms pentru scriere pentru blocuri de 4 KB la ad\u00e2ncimea cozii egal\u0103 cu 1. Suntem m\u00e2ndri s\u0103 anun\u021b\u0103m c\u0103 aceste cifre au fost confirmate, \u0219i chiar cu un mare surplus. Este interesant c\u0103 \u00eent\u00e2rzierea minim\u0103 la citire (280\u2013290 \u03bcs pentru DC500R \u0219i 250\u2013260 \u03bcs pentru DC500M) este atins\u0103 nu la QD=1, ci la 2\u20134. <br \/>\n\u00cent\u00e2rzierea la scriere la QD=1 a fost de 50 \u03bcs (aceast\u0103 \u00eent\u00e2rziere mic\u0103 se ob\u021bine datorit\u0103 faptului c\u0103, la o sarcin\u0103 mic\u0103, se elibereaz\u0103 \u00een mod garantat cache-ul stoc\u0103rii, \u0219i observ\u0103m \u00eentotdeauna \u00eent\u00e2rzierea la scrierea \u00een cache). Aceast\u0103 valoare este de 40 de ori mai mic\u0103 dec\u00e2t cea declarat\u0103!<\/p>\n<p><b>Test de performan\u021b\u0103 continu\u0103<\/b><\/p>\n<p>\u00cenc\u0103 o verificare extrem de realist\u0103, \u00een care se studiaz\u0103 schimbarea performan\u021bei (IOPS \u0219i \u00eent\u00e2rzierea) \u00een timpul unei lucr\u0103ri intensive prelungite. Ca scenariul de lucru, s-a ales scrierea aleatorie \u00een blocuri de 4 KB timp de 600 de minute. Scopul acestui test este c\u0103, la o astfel de sarcin\u0103, SSD-ul ajunge \u00een modul de satura\u021bie, c\u00e2nd controlerul se ocup\u0103 continuu cu colectarea de\u0219eurilor pentru a preg\u0103ti blocurile de memorie libere pentru scriere. A\u0219adar, acesta este modul cel mai epuizant \u2014 exact ceea ce \u00eent\u00e2lnesc SSD-urile de clas\u0103 enterprise aflate \u00een servere reale.<\/p>\n<p>\u00cen urma testului, Truesystems au ob\u021binut urm\u0103toarele valori de performan\u021b\u0103:<\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/307620d09419305aee0caf4b894da9b3.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPrincipalul rezultat al acestei p\u0103r\u021bi a testului: at\u00e2t Kingston DC500R, c\u00e2t \u0219i Kingston DC500M dep\u0103\u0219esc valorile lor de fabric\u0103 \u00een utilizare real\u0103. C\u00e2nd blocurile preg\u0103tite s-au terminat, \u00eencepe modul de satura\u021bie, Kingston DC500R men\u021bine un nivel de 22 000 IOPS (\u00een loc de 20 000 IOPS). Kingston DC500M se men\u021bine \u00een intervalul 77-78 000, de\u0219i profilul stoc\u0103rii declar\u0103 75 000 IOPS. De asemenea, prin acest test se observ\u0103 clar diferen\u021ba \u00eentre stoc\u0103ri: dac\u0103 \u00een procesul de lucru al stoc\u0103rii se preconizeaz\u0103 o propor\u021bie mare de opera\u021bii de scriere, Kingston DC500M se dovede\u0219te a fi de peste trei ori mai performant (de asemenea, trebuie s\u0103 re\u021binem c\u0103 \u0219i \u00een opera\u021biile de citire DC500M s-a comportat mai bine la \u00eent\u00e2rzieri).<\/p>\n<p>\u00cent\u00e2rzierile \u00een timpul opera\u021biunilor constante de scriere sunt prezentate \u00een graficul urm\u0103tor. Valoarea median\u0103, percentile 99%, 99,9% \u0219i 99,99%.<\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/9a9de9c89358c7220673b2883af0ba2c.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nObserv\u0103m c\u0103 \u00eent\u00e2rzierile ambelor unit\u0103\u021bi cresc propor\u021bional cu sc\u0103derea performan\u021bei, f\u0103r\u0103 c\u0103deri bru\u0219te \u0219i v\u00e2rfuri inexplicabile. Acest aspect este foarte important, deoarece compan\u021biile se a\u0219teapt\u0103 de la unit\u0103\u021bile corporative la predictibilitate. Exper\u021bii de la Truesystems subliniaz\u0103 c\u0103 testarea a fost realizat\u0103 pe 8 fluxuri cu o ad\u00e2ncime a cozii de 16 pentru fiecare flux, a\u0219a c\u0103 nu valorile absolute sunt importante, ci dinamica. C\u00e2nd au testat DC400, \u00een acel test au ap\u0103rut \u00eent\u00e2rzieri semnificative din cauza func\u021bion\u0103rii controlerului, dar \u00een acest grafic astfel de probleme nu exist\u0103 pentru Kingston DC500R \u0219i Kingston DC500M.<\/p>\n<p><b>Distribu\u021bia \u00eent\u00e2rzierii sub \u00eenc\u0103rcare<\/b><\/p>\n<p>Ca bonus, echipa Truesystems a supus Kingston DC500R \u0219i Kingston DC500M unui test simplificat nr. 13 din specifica\u021bia SNIA SSS PTS 2.0.1. A fost investigat\u0103 distribu\u021bia \u00eent\u00e2rzierii sub \u00eenc\u0103rcare sub forma unui tipar special CBW:<\/p>\n<p><b>Dimensiunile blocurilor:<\/b><\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/ae55c5e0f5d28b655f25ace54f3b2fa9.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDistribu\u021bia \u00eenc\u0103rc\u0103turii pe volum de stocare:<\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/c4120f1d05e64ea73a613f56e051441f.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nRaportul citire\/ Scriere: 60\/40%.<\/p>\n<p>Dup\u0103 un \u0219tergere sigur\u0103 \u0219i o \u00eenc\u0103rcare prealabil\u0103, evaluatorii au ini\u021biat c\u00e2te 10 runde principale de testare de 60 de secunde pentru un num\u0103r de fluxuri de 1\u20134 \u0219i ad\u00e2ncimea cozii de 1\u201332. Ca urmare, a fost construit un histogram\u0103 de distribu\u021bie pe valorile din runde, corespunz\u0103toare performan\u021bei medii (IOPS). Pentru ambele unit\u0103\u021bi, aceasta a fost atins\u0103 la un flux cu ad\u00e2ncimea cozii de 4.<\/p>\n<p>\u00cen final, au rezultat urm\u0103toarele valori:<br \/>\nDC500R: 17949 IOPS la \u00eent\u00e2rziere de 594 \u00b5s<br \/>\nDC500M: 18880 IOPS la 448 \u00b5s.<\/p>\n<p>Distribu\u021bia \u00eent\u00e2rzierii a fost analizat\u0103 separat pentru citire \u0219i scriere.<\/p>\n<p><img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/8fa6a125db5846ee9eee20809d786e98.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/14e8017cddf158d912617c71ce059999.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/953dd76e6528f3235ddc2575b220580e.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"La cererea dumneavoastr\u0103: test profesional al SSD-urilor Kingston DC500R \u0219i DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/fac22aab2b69e587c7cb884b7fb598c9.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h2>Concluzie<\/h2>\n<p>\nEchipa Truesystems a concluzionat c\u0103 rezultatele testelor Kingston DC500R \u0219i Kingston DC500M sunt \u00een mod clar interpretate ca fiind bune. Kingston DC500R se descurc\u0103 excelent la opera\u021biile de citire \u0219i poate fi recomandat ca echipament profesional pentru sarcinile corespunz\u0103toare. Pentru o \u00eenc\u0103rcare mixt\u0103 \u0219i \u00een caz de necesitate a mai multor resurse, Truesystems recomand\u0103 Kingston DC500M. De asemenea, publica\u021bia subliniaz\u0103 pre\u021burile atractive pentru \u00eentreaga gam\u0103 de unit\u0103\u021bi corporative Kingston \u0219i recunoa\u0219te c\u0103 trecerea la TLC 3D-NAND a ajutat cu adev\u0103rat la reducerea costului, f\u0103r\u0103 a pierde calitate. De asemenea, exper\u021bii de la Truesystems au apreciat nivelul \u00eenalt de suport tehnic oferit de Kingston \u0219i garan\u021bia de cinci ani pentru seria de unit\u0103\u021bi DC500.<\/p>\n<p>P.S. V\u0103 reamintim c\u0103 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.truesystem.ru\/review\/423689\/\">originalul recenziei poate fi citit pe site-ul Truesystems<\/a><\/noindex>.<\/p>\n<p>Pentru informa\u021bii suplimentare despre produsele Kingston Technology, v\u0103 rug\u0103m s\u0103 contacta\u021bi <noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrTruesystemKingston\">site-ul companiei<\/a><\/noindex>.<br \/>\n<br \/>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/kingston_technology\/blog\/471942\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u044b \u043f\u0440\u043e\u0441\u0438\u043b\u0438 \u043f\u043e\u043a\u0430\u0437\u0430\u0442\u044c \u0440\u0435\u0430\u043b\u044c\u043d\u044b\u0435 \u043f\u0440\u0438\u043c\u0435\u0440\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u043d\u0430\u0448\u0438\u0445 \u043a\u043e\u0440\u043f\u043e\u0440\u0430\u0442\u0438\u0432\u043d\u044b\u0445 SSD-\u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u0435\u0439 \u0438 \u043f\u0440\u043e\u0444\u0435\u0441\u0441\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0435 \u0442\u0435\u0441\u0442\u044b. \u041f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c \u0432\u0430\u0448\u0435\u043c\u0443 \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u044e \u043f\u043e\u0434\u0440\u043e\u0431\u043d\u044b\u0439 \u043e\u0431\u0437\u043e\u0440 \u043d\u0430\u0448\u0438\u0445 SSD-\u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u0435\u0439 Kingston DC500R \u0438 DC500M \u043e\u0442 \u043d\u0430\u0448\u0435\u0433\u043e \u043f\u0430\u0440\u0442\u043d\u0435\u0440\u0430 Truesystems. \u042d\u043a\u0441\u043f\u0435\u0440\u0442\u044b Truesystems \u0441\u043e\u0431\u0440\u0430\u043b\u0438 \u0440\u0435\u0430\u043b\u044c\u043d\u044b\u0439 \u0441\u0435\u0440\u0432\u0435\u0440 \u0438 \u044d\u043c\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043b\u0438 \u0430\u0431\u0441\u043e\u043b\u044e\u0442\u043d\u043e \u0440\u0435\u0430\u043b\u044c\u043d\u044b\u0435 \u0437\u0430\u0434\u0430\u0447\u0438, \u0441 \u043a\u043e\u0442\u043e\u0440\u044b\u043c\u0438 \u0441\u0442\u0430\u043b\u043a\u0438\u0432\u0430\u044e\u0442\u0441\u044f \u0432\u0441\u0435 \u0442\u0432\u0435\u0440\u0434\u043e\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u0438 \u043a\u043e\u0440\u043f\u043e\u0440\u0430\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u043a\u043b\u0430\u0441\u0441\u0430. \u0414\u0430\u0432\u0430\u0439\u0442\u0435 \u043f\u043e\u0447\u0438\u0442\u0430\u0435\u043c, \u0447\u0442\u043e \u0443 \u043d\u0438\u0445 \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u043e\u0441\u044c! \u041c\u043e\u0434\u0435\u043b\u044c\u043d\u0430\u044f \u043b\u0438\u043d\u0435\u0439\u043a\u0430 Kingston 2019 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":29338,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-39097","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 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412\u044b \u043f\u0440\u043e\u0441\u0438\u043b\u0438 \u043f\u043e\u043a\u0430\u0437\u0430\u0442\u044c \u0440\u0435\u0430\u043b\u044c\u043d\u044b\u0435 \u043f\u0440\u0438\u043c\u0435\u0440\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u043d\u0430\u0448\u0438\u0445 \u043a\u043e\u0440\u043f\u043e\u0440\u0430\u0442\u0438\u0432\u043d\u044b\u0445 SSD-\u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u0435\u0439 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