{"id":33702,"date":"2019-10-31T21:54:15","date_gmt":"2019-10-31T18:54:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/monitoring-sostoyaniya-ssd-v-massivah-qsan\/"},"modified":"2019-10-31T21:54:15","modified_gmt":"2019-10-31T18:54:15","slug":"monitoring-sostoyaniya-ssd-v-massivah-qsan","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/administrirovanie\/monitoring-sostoyaniya-ssd-v-massivah-qsan","title":{"rendered":"\u00d6vervakning av SSD-status i Qsan-arrayer","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Anv\u00e4ndningen av solid-state-enheter inom datalagring \u00e4r numera ingen \u00f6verraskning. SSD:er har blivit en sj\u00e4lvklarhet i IT-utrustning, fr\u00e5n persondatorer och b\u00e4rbara datorer till servrar och lagringssystem. Under den tid som har g\u00e5tt har flera generationer SSD:er lanserats, var och en med f\u00f6rb\u00e4ttrade egenskaper n\u00e4r det g\u00e4ller prestanda, p\u00e5litlighet och maximal kapacitet. Men fr\u00e5gan om \u00f6vervakning av skrivresursen f\u00f6r SSD:er \u00e4r fortfarande aktuell.<\/p>\n

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\"\u00d6vervakning
\n<\/a><\/noindex><\/p>\n

Solid-state-enheter har, p\u00e5 grund av sin fysiska konstruktion, en f\u00f6rutbest\u00e4md begr\u00e4nsad skrivresurs. Det faktum att det skrivs mycket mer data p\u00e5 SSD:n \u00e4n vad som skickas till den av v\u00e4rden (s\u00e4rskilt i en RAID-grupp) n\u00e4rmar oss ytterligare den angivna gr\u00e4nsen. Detta omst\u00e4ndighet v\u00e4cker en viss oro hos vissa anv\u00e4ndare n\u00e4r det g\u00e4ller att anv\u00e4nda SSD:er.<\/p>\n

<\/p>\n

I verkligheten \u00e4r det inte s\u00e5 illa som det kan verka. Den ber\u00e4knade skrivresursen DWPD anges f\u00f6r hela garantiperioden av enheten (vanligtvis 3-5 \u00e5r). D\u00e4rf\u00f6r kommer den verkliga skrivresursen TBW att vara ganska imponerande, vilket g\u00f6r att man inte beh\u00f6ver vara r\u00e4dd f\u00f6r att \"slita ut\" en SSD p\u00e5 bara n\u00e5gra m\u00e5nader. Dessutom kan man i vissa fall tillf\u00e4lligt anv\u00e4nda enheterna i ett mer intensivt l\u00e4ge \u00e4n vad tillverkaren angett, just p\u00e5 grund av de h\u00f6ga TBW-v\u00e4rdena. Men allt detta undanr\u00f6jer inte behovet av att \u00f6vervaka den aktuella skrivresursen f\u00f6r varje enskild SSD f\u00f6r att kunna proaktivt byta ut den n\u00e4r vissa gr\u00e4nsv\u00e4rden uppn\u00e5s.<\/p>\n

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Varje tillverkare av lagringssystem implementerar denna funktion p\u00e5 sitt eget s\u00e4tt. Men oftast handlar det bara om en egenskap hos enheten som \u00e4r fungerande\/icke fungerande. Qsan<\/a><\/noindex> I sina All Flash-system<\/a><\/noindex>, i motsats, har gjort en fullst\u00e4ndig visualisering av parametrarna f\u00f6r den aktuella aktiviteten av SSD:er i form av en separat modul som kallas QSLife. Denna modul \u00e4r en integrerad del av det nya operativsystemet XEVO<\/a><\/noindex>, under vilket alla Qsan-lagringssystem i framtiden kommer att fungera.<\/p>\n

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F\u00f6r varje SSD i systemet visas den aktuella \"livsniv\u00e5n\" i den maximalt tillg\u00e4ngliga formen. Det \u00e4r ingen hemlighet att alla moderna SSD:er h\u00e5ller reda p\u00e5 de block som skrivits till dem. Utifr\u00e5n dessa v\u00e4rden ber\u00e4knar systemet nedslitningsgraden av lagringsenheten i f\u00f6rh\u00e5llande till dess partitionering. Det slutgiltiga resultatet visas som en procentandel av ett helt nytt SSD. Vi b\u00f6r ocks\u00e5 notera att nedslitningsgraden ber\u00e4knas inte bara f\u00f6r den tidsperiod som lagringsenheten har arbetat inom All Flash-arrayen Qsan, utan f\u00f6r hela dess livsl\u00e4ngd, inklusive arbete i andra system (om s\u00e5dant har f\u00f6rekommit).<\/p>\n

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\"\u00d6vervakning<\/p>\n

F\u00f6rutom den f\u00f6renklade informationen om lagringsenheten kan man \u00e4ven ta reda p\u00e5 vissa detaljer. Bland annat volymen data som skrivits till den under hela dess livsl\u00e4ngd. Och under den tid som lagringsenheten har arbetat inom All Flash-arrayen Qsan<\/a><\/noindex>, \u00e4r diagram \u00f6ver dess prestanda i l\u00e4s- och skrivoperationer tillg\u00e4ngliga. Statistiken samlas in i realtid och \u00e4r tillg\u00e4nglig f\u00f6r vilken period som helst med en djupg\u00e5ende \u00f6versikt p\u00e5 upp till ett \u00e5r.<\/p>\n

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\"\u00d6vervakning<\/p>\n

Sj\u00e4lvklart \u00e4r syftet med denna funktionalitet inte bara att skapa snygga diagram f\u00f6r att gl\u00e4dja administrat\u00f6ren, utan ocks\u00e5 att utf\u00f6ra proaktiv analys av lagringsenheternas tillst\u00e5nd och f\u00f6rhindra potentiella framtida problem relaterade till deras nedslitning. D\u00e4rf\u00f6r kan man st\u00e4lla in flera tr\u00f6sklar och motsvarande \u00e5tg\u00e4rder relaterade till utmattningen av SSD:ers skrivresurs n\u00e4r det g\u00e4ller \"livsniv\u00e5n\".<\/p>\n

<\/p>\n

\"\u00d6vervakning<\/p>\n

Om man tittar p\u00e5 andra modeller av lagringssystem (inte specialiserade All Flash, utan allm\u00e4nna) fr\u00e5n Qsan<\/a><\/noindex>, s\u00e5 finns det ingen liknande visualiserad rapport f\u00f6r lagringsenheterna. Det \u00e4r f\u00f6rst\u00e5eligt: flaggskeppet m\u00e5ste p\u00e5 n\u00e5got s\u00e4tt skilja sig fr\u00e5n mainstream. Men \u00e4ven i den regulj\u00e4ra produktlinjen genomf\u00f6rs en s\u00e5dan \u00f6vervakning. Ja, utan insamling av statistik om anv\u00e4ndning och prestanda. Men huvudfunktionen f\u00f6r \u00f6vervakning av skrivresursen finns kvar.<\/p>\n

<\/p>\n

\"\u00d6vervakning<\/p>\n

I takt med att teknologin f\u00f6r produktion av SSD-enheter st\u00e4ndigt f\u00f6rb\u00e4ttras har fr\u00e5gan om deras p\u00e5litlighet blivit mindre br\u00e4nnande. Men \u00f6vervakning av deras skrivresurs \u00e4r fortfarande av stor betydelse. En v\u00e4lkonfigurerad \u00f6vervakning g\u00f6r det m\u00f6jligt f\u00f6r administrat\u00f6ren att f\u00f6rutse SSD:ns \u00e5ldrande i enlighet med aktuella belastningar, och f\u00f6r f\u00f6retagets ledning att ber\u00e4kna TCO (total \u00e4gandekostnad).<\/p><\/blockquote>\n

K\u00e4lla: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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