{"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\/da\/blog\/administrirovanie\/monitoring-sostoyaniya-ssd-v-massivah-qsan","title":{"rendered":"Overv\u00e5gning af SSD-tilstand i Qsan-rack","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Brugen af SSD'er i datalagring er ikke l\u00e6ngere overraskende for nogen. SSD'er har fast etableret sig i IT-udstyr fra personlige computere og b\u00e6rbare til servere og lagringssystemer. I takt med udviklingen har der v\u00e6ret flere generationer af SSD'er, hver med forbedrede pr\u00e6stations-, p\u00e5lideligheds- og kapacitetskarakteristika. Men sp\u00f8rgsm\u00e5let om overv\u00e5gning af SSD'ernes skrivekapacitet er stadig aktuelt.<\/p>\n

<\/p>\n

\"Overv\u00e5gning
\n<\/a><\/noindex><\/p>\n

SSD'er har, p\u00e5 grund af deres fysiske opbygning, en forudbestemt skrivekapacitet. Det faktum, at der skrives langt flere data til en SSD end der sendes til den fra v\u00e6rten (is\u00e6r i RAID-grupper), bringer os endnu t\u00e6ttere p\u00e5 den angivne gr\u00e6nse. Denne omst\u00e6ndighed udg\u00f8r en form for frygt for nogle brugere i forhold til brugen af SSD'er.<\/p>\n

<\/p>\n

Faktisk er det ikke s\u00e5 slemt, som det lyder. Den beregnede DWPD-kapacitet gives for hele garantiperioden for lagringsenheden (normalt 3-5 \u00e5r). Derfor vil den reelle TBW-kapacitet v\u00e6re ganske betydelig, hvilket g\u00f8r det muligt at undg\u00e5 frygten for at 'slidte' SSD'en p\u00e5 blot nogle f\u00e5 m\u00e5neder. Desuden kan det i visse tilf\u00e6lde v\u00e6re muligt midlertidigt at bruge lagringsenhederne i et mere intensivt tempo, end producenten angiver, netop takket v\u00e6re de h\u00f8je TBW-v\u00e6rdier. Men alt dette \u00e6ndrer ikke behovet for at overv\u00e5ge den aktuelle skrivekapacitet for hver enkelt SSD med henblik p\u00e5 proaktivt at skifte dem ud, n\u00e5r bestemte t\u00e6rskler er n\u00e5et.<\/p>\n

<\/p>\n

Hver leverand\u00f8r af lagringssystemer implementerer denne funktionalitet p\u00e5 sin egen m\u00e5de. Men oftest er det blot en egenskab ved lagringsenheden: funktionsdygtig\/defekt. Qsan<\/a><\/noindex> i sine All Flash-systemer<\/a><\/noindex>, tv\u00e6rtimod, har lavet en fuld visualisering af de aktuelle SSD-aktivitetsparametre i form af en separat modul kaldet QSLife. Dette modul er en uundg\u00e5elig del af det nye operativsystem XEVO<\/a><\/noindex>, under hvilket alle Qsan-lagringssystemer i fremtiden vil fungere.<\/p>\n

<\/p>\n

For each SSD in the system, the current \"health level\" is displayed in the most accessible form. It is well known that all modern SSDs keep track of the blocks written to them. Based on these values, the system calculates the wear indicator of the drive according to its mapping. The final result is displayed as a percentage of a completely new SSD. It should also be noted that the wear level is calculated not only for the period during which the drive operated as part of the All Flash array Qsan, but for its entire lifespan, including operation in other systems (if applicable).<\/p>\n

<\/p>\n

\"Overv\u00e5gning<\/p>\n

In addition to simplified information about the drive, it is possible to learn some details. In particular, the amount of data written to it over its entire lifespan. And during the time the drive operated as part of the All Flash array Qsan<\/a><\/noindex>, performance graphs of its read and write operations are available. Statistics are collected in real-time and are available for any period with a depth of view up to one year.<\/p>\n

<\/p>\n

\"Overv\u00e5gning<\/p>\n

Of course, the purpose of this functionality is not only to create beautiful graphs for the administrator's enjoyment, but also for proactive analysis of drive conditions and preventing potential future problems related to their wear. Therefore, numerous thresholds and corresponding actions related to the SSD's write resource depletion can be set regarding the \"health level\" of the SSD.<\/p>\n

<\/p>\n

\"Overv\u00e5gning<\/p>\n

If we look at other models of storage systems (not specialized All Flash, but general-purpose) from Qsan<\/a><\/noindex>, there are no similar visual reports on the drives. It is understandable: after all, the flagship should somehow be different from the mainstream. However, even in the regular product line, such monitoring is conducted. Yes, without collecting statistics on usage and performance. But the main function of monitoring write resources is present.<\/p>\n

<\/p>\n

\"Overv\u00e5gning<\/p>\n

Med den konstante forbedringen av produksjonsteknologiene for solid-state-disker, har sp\u00f8rsm\u00e5let om deres p\u00e5litelighet blitt litt mindre presserende. Men likevel er overv\u00e5king av deres slitasje fortsatt aktuelt. En korrekt konfigurert overv\u00e5king vil la administratoren forutsi aldring av SSD-er basert p\u00e5 de n\u00e5v\u00e6rende belastningene, mens selskapets ledelse kan beregne TCO (totale eierskapskostnader).<\/p><\/blockquote>\n

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

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