{"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\/sk\/blog\/administrirovanie\/po-vashim-zayavkam-professionalnyj-test-ssd-nakopitelej-kingston-dc500r-i-dc500m","title":{"rendered":"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u017diadali ste re\u00e1lne pr\u00edklady vyu\u017eitia na\u0161ich firemn\u00fdch SSD diskov a profesion\u00e1lne testy. Predstavujeme v\u00e1m podrobn\u00fd preh\u013ead na\u0161ich SSD diskov <noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrKingstonTruesystem\">Kingston DC500R a DC500M<\/a><\/noindex> od n\u00e1\u0161ho partnera Truesystems. Odborn\u00edci z Truesystems zostavili skuto\u010dn\u00fd server a emulovali absol\u00fatne re\u00e1lne \u00falohy, s ktor\u00fdmi sa stret\u00e1vaj\u00fa v\u0161etky SSD diskov\u00e9 jednotky podnikovej \u00farovne. Po\u010fme sa pozrie\u0165, \u010do sa im podarilo!<\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a 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>Modelov\u00e1 l\u00ednia Kingston z roku 2019<\/h2>\n<p>\nNa \u00favod trochu suchej te\u00f3rie. V\u0161etky SSD disky Kingston m\u00f4\u017eeme rozdeli\u0165 do \u0161tyroch hlavn\u00fdch skup\u00edn. Toto rozdelenie je podmienen\u00e9, preto\u017ee tie ist\u00e9 disky spadaj\u00fa do nieko\u013ek\u00fdch rod\u00edn.<\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrMainPage\">SSD pre mont\u00e1\u017e syst\u00e9mov:<\/a><\/noindex> SATA SSD v form\u00e1toch 2,5\", M.2 a mSATA Kingston UV500 a dve modely \u00falo\u017e\u00edsk s rozhran\u00edm NVMe \u2014 Kingston A1000 a Kingston KC2000;<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrKingstonSSD\">SSD pre pou\u017e\u00edvate\u013eov<\/a><\/noindex>. Tie\u017e rovnak\u00e9 modely ako v predch\u00e1dzaj\u00facej skupine, a navy\u0161e SATA SSD Kingston A400;<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrKingstonForCompanies\">SSD pre firmy<\/a><\/noindex>: UV500 a KC2000;<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrForSystem\">Firemn\u00e9 SSD<\/a><\/noindex>. Disky s\u00e9rie DC500, ktor\u00e9 sa stali hrdinom tohto preh\u013eadu. L\u00ednia DC500 je rozdelen\u00e1 na DC500R (preferovan\u00e9 \u010d\u00edtanie, 0,5 DWPD) a DC500M (zmie\u0161an\u00e9 za\u0165a\u017eenia, 1,3 DWPD). <\/li>\n<\/ul>\n<p>\nNa teste od Truesystems boli Kingston DC500R s kapacitou 960 GB a Kingston DC500M s 1920 GB pam\u00e4te. Obnovme si ich parametre:<\/p>\n<p><b>Kingston DC500R<\/b><\/p>\n<ul>\n<li>Kapacita: 480, 960, 1920, 3840 GB<\/li>\n<li>Form\u00e1t: 2,5\", v\u00fd\u0161ka 7 mm<\/li>\n<li>Rozhranie: SATA 3.0, 6 Gb\/s<\/li>\n<li>Zverejnen\u00fd v\u00fdkon (pre model 960 GB)<\/li>\n<li>Sekven\u010dn\u00fd pr\u00edstup: \u010d\u00edtanie \u2014 555 MB\/s, z\u00e1pis \u2014 525 MB\/s<\/li>\n<li>N\u00e1hodn\u00fd pr\u00edstup (blok 4 KB): \u010d\u00edtanie \u2014 98\u2009000 IOPS, z\u00e1pis \u2014 20\u2009000 IOPS<\/li>\n<li>QoS latencie (blok 4 KB, QD=1, percentil 99,9%): \u010d\u00edtanie \u2014 500 \u00b5s, z\u00e1pis \u2014 2 ms<\/li>\n<li>Emulovan\u00e1 ve\u013ekos\u0165 sektora: 512 bajtov (logick\u00e1\/fyzick\u00e1)<\/li>\n<li>\u017divotnos\u0165: 0,5 DWPD<\/li>\n<li>Z\u00e1ru\u010dn\u00e1 doba: 5 rokov<\/li>\n<\/ul>\n<p>\n<b>Kingston DC500M<\/b><\/p>\n<ul>\n<li>Kapacita: 480, 960, 1920, 3840 GB<\/li>\n<li>Form\u00e1t: 2,5\", v\u00fd\u0161ka 7 mm<\/li>\n<li>Rozhranie: SATA 3.0, 6 Gb\/s<\/li>\n<li>Zverejnen\u00fd v\u00fdkon (pre model 1920 GB)<\/li>\n<li>Sekven\u010dn\u00fd pr\u00edstup: \u010d\u00edtanie \u2014 555 MB\/s, z\u00e1pis \u2014 520 MB\/s<\/li>\n<li>N\u00e1hodn\u00fd pr\u00edstup (blok 4 KB): \u010d\u00edtanie \u2014 98\u2009000 IOPS, z\u00e1pis \u2014 75\u2009000 IOPS<\/li>\n<li>QoS latencie (blok 4 KB, QD=1, percentil 99,9%): \u010d\u00edtanie \u2014 500 \u00b5s, z\u00e1pis \u2014 2 ms<\/li>\n<li>Emulovan\u00e1 ve\u013ekos\u0165 sektora: 512 bajtov (logick\u00e1\/fyzick\u00e1)<\/li>\n<li>\u017divotnos\u0165: 1,3 DWPD<\/li>\n<li>Z\u00e1ru\u010dn\u00e1 doba: 5 rokov<\/li>\n<\/ul>\n<p>\nExperti spolo\u010dnosti Truesystems si v\u0161imli, \u017ee v \u00falo\u017eisk\u00e1ch Kingston s\u00fa uveden\u00e9 hodnoty QoS celkovej latencie ako maxim\u00e1lna hodnota percentilu 99,9 % (99,9 % v\u0161etk\u00fdch hodn\u00f4t bude men\u0161\u00edch ako uveden\u00e1 hodnota). To je ve\u013emi d\u00f4le\u017eit\u00fd parameter, najm\u00e4 pre serverov\u00e9 \u00falo\u017eisk\u00e1, preto\u017ee sa od nich vy\u017eaduje predv\u00eddate\u013enos\u0165, stabilita a absencia neo\u010dak\u00e1van\u00fdch zlyhan\u00ed. Ak viete, ak\u00e9 QoS latencie s\u00fa uveden\u00e9 v \u0161pecifik\u00e1cii \u00falo\u017eiska, m\u00f4\u017eete predpoveda\u0165 jeho v\u00fdkon, \u010do je ve\u013emi pohodln\u00e9.<\/p>\n<h2>Parametre testovania<\/h2>\n<p>\nObe \u00falo\u017eisk\u00e1 boli testovan\u00e9 na testovacej stanici, ktor\u00e1 imituje server. Jej charakteristiky s\u00fa:<\/p>\n<ul>\n<li>Procesor Intel Xeon E5-2620 V4 (8 jadier, 2,1 GHz, HT zapnut\u00e9)<\/li>\n<li>32 GB pam\u00e4te<\/li>\n<li>Z\u00e1kladn\u00e1 doska Supermicro X10SRi-F (1x socket R3, Intel C612)<\/li>\n<li>CentOS Linux 7.6.1810<\/li>\n<li>Na generovanie z\u00e1\u0165a\u017ee bol pou\u017eit\u00fd FIO verzie 3.14<\/li>\n<\/ul>\n<p>\nA e\u0161te raz o tom, ak\u00e9 SSD \u00falo\u017eisk\u00e1 boli testovan\u00e9:<\/p>\n<ul>\n<li>Kingston DC500R 960 GB (SEDC500R960G)<\/li>\n<li>Firmware: SCEKJ2.3<\/li>\n<li>Objem: 960\u2009197\u2009124\u2009096 bajtov<\/li>\n<li>Kingston DC500M 1920 GB (SEDC500M1920G)<\/li>\n<li>Firmware: SCEKJ2.3<\/li>\n<li>Objem: 1\u2009920\u2009383\u2009410\u2009176 bajtov <\/li>\n<\/ul>\n<p><\/p>\n<h2>Metodika testovania<\/h2>\n<p>\nZa z\u00e1klad bol vzat\u00fd popul\u00e1rny s\u00fabor testov <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>, av\u0161ak testeri do neho zaviedli \u00fapravy, aby za\u0165a\u017eenia boli bli\u017e\u0161ie k re\u00e1lnemu pou\u017eitiu podnikov\u00fdch SSD v roku 2019. V popise ka\u017ed\u00e9ho testu uvedieme, \u010do konkr\u00e9tne bolo zmenen\u00e9 a pre\u010do.<\/p>\n<p><b>Test oper\u00e1ci\u00ed vstupu a v\u00fdstupu (IOPS)<\/b><\/p>\n<p>V tomto teste sa meria po\u010det oper\u00e1ci\u00ed vstupu a v\u00fdstupu za sekundu pre bloky r\u00f4znej ve\u013ekosti (1024 kB, 128 kB, 64 kB, 32 kB, 16 kB, 8 kB, 4 kB, 0,5 kB) a n\u00e1hodn\u00fd pr\u00edstup s r\u00f4znym pomerom \u010d\u00edtania\/z\u00e1pisu (100\/0, 95\/5, 65\/35, 50\/50, 35\/65, 5\/95, 0\/100). Experti spolo\u010dnosti Truesystems pou\u017eili nasleduj\u00face parametre testu: 16 tokov s h\u013abkou fronty 8. Pri tom blok 0,5 kB (512 bajtov) v\u00f4bec nebol spusten\u00fd, preto\u017ee jeho ve\u013ekos\u0165 je pr\u00edli\u0161 mal\u00e1 na to, aby v\u00e1\u017ene za\u0165a\u017eil \u00falo\u017eisk\u00e1.<\/p>\n<p><b>Kingston DC500R v teste IOPS<\/b><\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/2b169fc3c4f518cd2fec7aedabb9e9ff.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTabu\u013ekov\u00e9 \u00fadaje:<\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/06adda8710c58aac284d1df263a828bc.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Kingston DC500M v teste IOPS<\/b><\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/aaeb74ed5750163a845aa78241ab689b.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTabu\u013ekov\u00e9 \u00fadaje:<\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/36e5235ca499073e28fdbdf39b8dda98.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTest IOPS nepredpoklad\u00e1 dosiahnutie satur\u00e1cie, preto sa vykon\u00e1va celkom \u013eahko. Oba disky si s t\u00fdm poradili v\u00fdborne a plne zodpovedali deklarovan\u00fdm v\u00fdrobn\u00fdm charakteristik\u00e1m. Testovan\u00e9 disky preuk\u00e1zali vynikaj\u00faci v\u00fdkon pri z\u00e1pise blokmi po 4 KB: 70 a 88 tis\u00edc IOPS. To je skvel\u00e9, najm\u00e4 pre Kingston DC500R, ktor\u00fd je orientovan\u00fd na \u010d\u00edtanie. \u010co sa t\u00fdka samotn\u00fdch oper\u00e1ci\u00ed \u010d\u00edtania, tieto SSD disky nielen\u017ee prekra\u010duj\u00fa svoje vlastn\u00e9 v\u00fdrobn\u00e9 hodnoty, ale celkovo sa pribli\u017euj\u00fa k stropnej v\u00fdkonnosti rozhrania SATA.<\/p>\n<p><b>Test priepustnosti<\/b><\/p>\n<p>V tomto teste sa sk\u00fama priepustnos\u0165 pri sekven\u010dnom pr\u00edstupe. Teda oba SSD disky vykon\u00e1vaj\u00fa oper\u00e1cie sekven\u010dn\u00e9ho \u010d\u00edtania a z\u00e1pisu blokmi 1 MB a 128 KB. 8 pr\u00fadov s h\u013abkou frontu 16 pre ka\u017ed\u00fd pr\u00fad.<\/p>\n<p><b>Kingston DC500R:<\/b><\/p>\n<ul>\n<li>128 KB sekven\u010dn\u00e9 \u010d\u00edtanie: 539,81 MB\/s<\/li>\n<li>128 KB sekven\u010dn\u00fd z\u00e1pis: 416,16 MB\/s<\/li>\n<li>1 MB sekven\u010dn\u00e9 \u010d\u00edtanie: 539,98 MB\/s<\/li>\n<li>1 MB sekven\u010dn\u00fd z\u00e1pis: 425,18 MB\/s<\/li>\n<\/ul>\n<p>\n<b>Kingston DC500M:<\/b><\/p>\n<ul>\n<li>128 KB sekven\u010dn\u00e9 \u010d\u00edtanie: 539,27 MB\/s<\/li>\n<li>128 KB sekven\u010dn\u00fd z\u00e1pis: 518,97 MB\/s<\/li>\n<li>1 MB sekven\u010dn\u00e9 \u010d\u00edtanie: 539,44 MB\/s<\/li>\n<li>1 MB sekven\u010dn\u00fd z\u00e1pis: 518,48 MB\/s<\/li>\n<\/ul>\n<p>\nA tu tie\u017e vid\u00edme, \u017ee r\u00fdchlos\u0165 sekven\u010dn\u00e9ho \u010d\u00edtania SSD sa pribl\u00ed\u017eila k limitu priepustnosti rozhrania SATA 3. V\u00f4bec neboli zisten\u00e9 probl\u00e9my so sekven\u010dn\u00fdm \u010d\u00edtan\u00edm pri diskoch Kingston.<\/p>\n<p>Sekven\u010dn\u00fd z\u00e1pis je trochu slab\u0161\u00ed, \u010do je obzvl\u00e1\u0161\u0165 dobre vidie\u0165 na Kingston DC500R, ktor\u00fd patr\u00ed do triedy orientovanej na \u010d\u00edtanie, teda je ur\u010den\u00fd na intenz\u00edvne \u010d\u00edtanie. Preto Kingston DC500R v tejto \u010dasti testu dosiahol hodnoty dokonca ni\u017e\u0161ie ako deklarovan\u00e9. Ale odborn\u00edci z Truesystems sa domnievaj\u00fa, \u017ee pre disk, ktor\u00fd v\u00f4bec nie je ur\u010den\u00fd na tak\u00e9to za\u0165a\u017eenia (pripom\u00edname, \u017ee \u017eivotnos\u0165 DC500R je 0,5 DWPD), t\u00fdchto 400 a viac MB\/s sa st\u00e1le d\u00e1 pova\u017eova\u0165 za dobr\u00fd v\u00fdsledok.<\/p>\n<h2>Test oneskorenia<\/h2>\n<p>\nAko sme u\u017e spom\u00ednali, toto je najd\u00f4le\u017eitej\u0161\u00ed test pre podnikov\u00e9 \u00falo\u017eisk\u00e1. Pod\u013ea neho je mo\u017en\u00e9 ur\u010di\u0165, ak\u00e9 probl\u00e9my sa vyskytuj\u00fa pri dlhodobom ka\u017edodennom pou\u017e\u00edvan\u00ed SSD disku. Po\u010das \u0161tandardn\u00e9ho testu SNIA PTS sa meraj\u00fa priemern\u00e9 a maxim\u00e1lne latencie pre r\u00f4zne ve\u013ekosti blokov (8 KB, 4 KB, 0,5 KB) a pomery \u010d\u00edtania\/z\u00e1pisu (100\/0, 65\/35, 0\/100) pri minim\u00e1lnej h\u013abke frontu (1 vl\u00e1kno s QD=1). V redakcii Truesystems sa v\u0161ak rozhodli v\u00e1\u017ene upravi\u0165 test, aby z\u00edskali realistickej\u0161ie hodnoty:<\/p>\n<ul>\n<li>Bol vyl\u00fa\u010den\u00fd blok 0,5 KB;<\/li>\n<li>Namiesto jednovl\u00e1knov\u00e9ho za\u0165a\u017eenia s frontami 1 a 32 sa za\u0165a\u017eenie men\u00ed pod\u013ea po\u010dtu vl\u00e1kien (1, 2, 4) a h\u013abky frontu (1, 2, 4, 8, 16, 32);<\/li>\n<li>Namiesto pomeru 65\/35 sa pou\u017e\u00edva 70\/30, \u010do je realistickej\u0161ie;<\/li>\n<li>Uv\u00e1dzaj\u00fa sa nielen priemern\u00e9 a maxim\u00e1lne hodnoty, ale aj percentily 99%, 99,9%;<\/li>\n<li>Pre vybran\u00e9 hodnoty po\u010dtu vl\u00e1kien sa zostavuj\u00fa grafy z\u00e1vislosti latencie (99%, 99,9% a priemern\u00e1 hodnota) od IOPS pre v\u0161etky bloky a pomery \u010d\u00edtania\/z\u00e1pisu.<\/li>\n<\/ul>\n<p>\n\u00dadaje sa priemerovali zo \u0161tyroch z 25 k\u00f4l trvaj\u00facich 35 sek\u00fand (5 \"zohriat\u00ed\" + 30-sekundov\u00e9 za\u0165a\u017eenie) ka\u017ed\u00fd. Pre grafy redakcia Truesystems vybrala s\u00e9riu hodn\u00f4t s h\u013abkou frontu od 1 do 32 pri 1\u20134 vl\u00e1knach. To bolo vykonan\u00e9 na pos\u00fadenie v\u00fdkonu \u00falo\u017e\u00edsk z h\u013eadiska latencie, teda maxim\u00e1lne realistick\u00fd ukazovate\u013e.<\/p>\n<p><b>Ukazovatele priemernej latencie:<\/b><\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/fe81e9f1a5ba9aba29a1dc173f3b51ff.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTento graf jasne demon\u0161truje rozdiel medzi modelmi DC500R a DC500M. Kingston DC500R je navrhnut\u00fd na intenz\u00edvne oper\u00e1cie \u010d\u00edtania, tak\u017ee po\u010det z\u00e1pisov\u00fdch oper\u00e1ci\u00ed prakticky nerastie so zvy\u0161uj\u00facim sa za\u0165a\u017een\u00edm a zost\u00e1va na \u00farovni 25 000. <br \/>\nAk sa pozrieme na zmie\u0161an\u00e9 za\u0165a\u017eenie (70% z\u00e1pisu a 30% \u010d\u00edtania), rozdiel medzi DC500R a DC500M je tie\u017e v\u00fdrazn\u00fd. Pri za\u0165a\u017een\u00ed, ktor\u00e9 zodpoved\u00e1 latencii 400 mikrosek\u00fand, je vidno, \u017ee univerz\u00e1lny DC500M m\u00e1 trojn\u00e1sobn\u00fd v\u00fdkon. To je tie\u017e celkom logick\u00e9 a vypl\u00fdva z charakterist\u00edk \u00falo\u017e\u00edsk.<br \/>\nZauj\u00edmav\u00fd detail \u2013 DC500M prekon\u00e1va DC500R aj pri 100%-nom \u010d\u00edtan\u00ed, pri\u010dom zabezpe\u010duje ni\u017e\u0161iu latenciu pri rovnakom po\u010dte IOPS. Rozdiel je mal\u00fd, ale ve\u013emi zauj\u00edmav\u00fd.<\/p>\n<p><b>99%-percentil latencie:<\/b><\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/af5df1ef51a743dfc3325cdf9c962d38.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n99.9%-percentil latencie:<\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/c361c07b7ffba1c1793466ceb0b84473.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNa t\u00fdchto grafoch odborn\u00edci Truesystems overovali d\u00f4veryhodnos\u0165 deklarovan\u00fdch charakterist\u00edk z h\u013eadiska QoS oneskorenia. V \u0161pecifik\u00e1ci\u00e1ch bola uveden\u00e1 hodnota 0,5 ms pri \u010d\u00edtan\u00ed a 2 ms pri p\u00edsan\u00ed pre blok 4 KB pri h\u013abke fronty rovnej 1. S hrdos\u0165ou oznamujeme, \u017ee tieto \u010d\u00edsla sa potvrdili, a to s ve\u013ekou rezervou. Zauj\u00edmav\u00e9 je, \u017ee minim\u00e1lne oneskorenie pri \u010d\u00edtan\u00ed (280\u2013290 \u00b5s pre DC500R a 250\u2013260 \u00b5s pre DC500M) sa dosahuje nie pri QD=1, ale pri 2\u20134. <br \/>\nOneskorenie pri p\u00edsan\u00ed pri QD=1 bolo 50 \u00b5s (tak\u00e9to n\u00edzke oneskorenie vznik\u00e1 v\u010faka tomu, \u017ee pri n\u00edzkej z\u00e1\u0165a\u017ei sa garantovane uvo\u013e\u0148uje cache pam\u00e4ti, a my v\u017edy vid\u00edme oneskorenie pri p\u00edsan\u00ed do cache). T\u00e1to hodnota je 40-kr\u00e1t ni\u017e\u0161ia ako deklarovan\u00e1 hodnota!<\/p>\n<p><b>Test kontinu\u00e1lny v\u00fdkon<\/b><\/p>\n<p>\u010eal\u0161ia ve\u013emi realistick\u00e1 kontrola, pri ktorej sa sk\u00fama zmena v\u00fdkonu (IOPS a oneskorenia) po\u010das dlhodobej intenz\u00edvnej pr\u00e1ce. Ako pracovn\u00fd scen\u00e1r bola zvolen\u00e1 n\u00e1hodn\u00e1 z\u00e1pisov\u00e1vacia prev\u00e1dzka po blokoch 4 KB po\u010das 600 min\u00fat. Zmysel tohto testu spo\u010d\u00edva v tom, \u017ee pri takejto z\u00e1\u0165a\u017ei SSD disk prech\u00e1dza do stavu satur\u00e1cie, ke\u010f sa radi\u010d neust\u00e1le zaober\u00e1 zberom fragmentov pam\u00e4te na pr\u00edpravu vo\u013en\u00fdch blokov na z\u00e1pis. Teda ide o maxim\u00e1lne vy\u010derp\u00e1vaj\u00faci re\u017eim \u2014 presne to, s \u010d\u00edm sa stret\u00e1vaj\u00fa SSD disky podnikovej triedy umiestnen\u00e9 na re\u00e1lnych serveroch.<\/p>\n<p>Na z\u00e1klade testu Truesystems dosiahli nasleduj\u00face v\u00fdkonnostn\u00e9 hodnoty:<\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/307620d09419305aee0caf4b894da9b3.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nHlavn\u00fd v\u00fdsledok tejto \u010dasti testu: aj Kingston DC500R, aj Kingston DC500M v re\u00e1lnej pr\u00e1ci prevy\u0161uj\u00fa vlastn\u00e9 tov\u00e1rensk\u00e9 hodnoty. Ke\u010f sa pripravovan\u00e9 bloky vy\u010derpaj\u00fa, za\u010dne sa re\u017eim satur\u00e1cie, Kingston DC500R sa udr\u017euje na \u00farovni 22 000 IOPS (namiesto 20 000 IOPS). Kingston DC500M sa udr\u017euje v rozsahu 77-78 000, hoci v profile disku je uveden\u00fdch 75 000 IOPS. Taktie\u017e z tohto testu je jasne vidite\u013en\u00fd rozdiel medzi diskami: ak je v pracovnom procese disku predpokladan\u00e1 vysok\u00e1 miera z\u00e1pisov\u00fdch oper\u00e1ci\u00ed, Kingston DC500M je viac ne\u017e trikr\u00e1t v\u00fdkonnej\u0161\u00ed (takisto nezab\u00fadajme, \u017ee aj pri \u010d\u00edtac\u00edch oper\u00e1ci\u00e1ch sa DC500M prejavil lep\u0161ie z h\u013eadiska oneskoren\u00ed).<\/p>\n<p>Oneskorenia po\u010das nepretr\u017eit\u00fdch z\u00e1pisov\u00fdch oper\u00e1ci\u00ed s\u00fa uveden\u00e9 na nasleduj\u00facom grafe. Medi\u00e1nov\u00e1 hodnota, percentily 99%, 99,9% a 99,99%.<\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/9a9de9c89358c7220673b2883af0ba2c.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nVid\u00edme, \u017ee oneskorenie oboch diskov rastie proporcion\u00e1lne so zni\u017eovan\u00edm v\u00fdkonnosti, bez v\u00fdrazn\u00fdch poklesov a nepochopite\u013en\u00fdch vrcholov. To je ve\u013emi dobr\u00e9, preto\u017ee pr\u00e1ve predv\u00eddate\u013enos\u0165 o\u010dak\u00e1vaj\u00fa od firemn\u00fdch diskov. Odborn\u00edci Truesystems zd\u00f4raz\u0148uj\u00fa, \u017ee testovanie prebiehalo v 8 vl\u00e1knach s h\u013abkou fronty 16 na ka\u017ed\u00fd vl\u00e1kn, preto s\u00fa d\u00f4le\u017eit\u00e9 nie absol\u00fatne hodnoty, ale dynamika. Ke\u010f testovali DC400, v tomto teste sa objavili siln\u00e9 oneskorenia kv\u00f4li pr\u00e1ci ovl\u00e1da\u010da, ale v tomto grafe tak\u00e9 probl\u00e9my u Kingston DC500R a Kingston DC500M nie s\u00fa.<\/p>\n<p><b>Distrib\u00facia oneskorenia pod za\u0165a\u017een\u00edm<\/b><\/p>\n<p>Ako bonus redakcia Truesystems prehnala Kingston DC500R a Kingston DC500M cez zjednodu\u0161en\u00fd test \u010d. 13 \u0161pecifik\u00e1cie SNIA SSS PTS 2.0.1. Sk\u00famala sa distrib\u00facia oneskorenia pod za\u0165a\u017een\u00edm vo forme \u0161peci\u00e1lneho vzoru CBW:<\/p>\n<p><b>Ve\u013ekosti blokov:<\/b><\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/ae55c5e0f5d28b655f25ace54f3b2fa9.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDistrib\u00facia za\u0165a\u017eenia pod\u013ea objemu disku:<\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/c4120f1d05e64ea73a613f56e051441f.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPomer \u010d\u00edtanie\/z\u00e1pis: 60\/40%.<\/p>\n<p>Po secure erase a predbe\u017enom za\u0165a\u017een\u00ed testeri spustili 10 60-sekundov\u00fdch k\u00f4l hlavn\u00e9ho testu pre po\u010det vl\u00e1ken 1\u20134 a h\u013abku fronty 1\u201332. Na z\u00e1klade v\u00fdsledkov bola zostaven\u00e1 histogram distrib\u00facie pod\u013ea hodn\u00f4t z k\u00f4l, ktor\u00e9 zodpovedali priemernej v\u00fdkonnosti (IOPS). Pre oba disky bola dosiahnut\u00e1 pri jednom vl\u00e1kn\u011b s h\u013abkou fronty 4.<\/p>\n<p>Na konci, dostali nasleduj\u00face hodnoty:<br \/>\nDC500R: 17949 IOPS pri oneskoren\u00ed 594 \u03bcs<br \/>\nDC500M: 18880 IOPS pri 448 \u03bcs.<\/p>\n<p>Distrib\u00facia oneskorenia bola analyzovan\u00e1 samostatne pre \u010d\u00edtanie a z\u00e1pis.<\/p>\n<p><img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/8fa6a125db5846ee9eee20809d786e98.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/14e8017cddf158d912617c71ce059999.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/953dd76e6528f3235ddc2575b220580e.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Na va\u0161e \u017eiadosti: profesion\u00e1lny test SSD diskov Kingston DC500R a DC500M\" src=\"\/wp-content\/uploads\/2019\/10\/fac22aab2b69e587c7cb884b7fb598c9.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h2>Z\u00e1ver<\/h2>\n<p>\nRedakcia Truesystems dospela k z\u00e1veru, \u017ee v\u00fdkon testov Kingston DC500R a Kingston DC500M jednozna\u010dne sa interpretuje ako dobr\u00fd. Kingston DC500R ve\u013emi dobre zvl\u00e1da oper\u00e1cie \u010d\u00edtania a m\u00f4\u017ee by\u0165 odpor\u00fa\u010dan\u00fd ako profesion\u00e1lne vybavenie pre pr\u00edslu\u0161n\u00e9 \u00falohy. Pre zmie\u0161an\u00e9 za\u0165a\u017eenie a pri potrebe v\u00e4\u010d\u0161\u00edch prostriedkov Truesystems odpor\u00fa\u010da Kingston DC500M. Redakcia taktie\u017e vyzdvihla atrakt\u00edvne ceny na cel\u00fa modelov\u00fa radu firemn\u00fdch diskov Kingston a uznala, \u017ee prechod na TLC 3D-NAND skuto\u010dne pomohol zn\u00ed\u017ei\u0165 cenu, bez straty kvality. E\u0161te odborn\u00edkom Truesystems sa p\u00e1\u010dil vysok\u00fd \u00farove\u0148 technickej podpory Kingston a p\u00e4\u0165ro\u010dn\u00e1 z\u00e1ruka na s\u00e9riu diskov DC500.<\/p>\n<p>P.S. Pripom\u00edname, \u017ee <noindex><a rel=\"nofollow\" href=\"https:\/\/www.truesystem.ru\/review\/423689\/\">origin\u00e1l recenzie si m\u00f4\u017eete pre\u010d\u00edta\u0165 na str\u00e1nke Truesystems.<\/a><\/noindex>.<\/p>\n<p>Pre viac inform\u00e1ci\u00ed o produktoch spolo\u010dnosti Kingston Technology sa obr\u00e1\u0165te <noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrTruesystemKingston\">na webov\u00fa str\u00e1nku spolo\u010dnosti<\/a><\/noindex>.<br \/>\n<br \/>Zdroj: <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 5.0.4 - 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 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