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Main memory versus secondary storage

#1
01-14-2020, 10:35 AM
I see main memory zipping along when you push data fast for the processor. You notice it grabs info in tiny bursts but loses everything without juice. Perhaps systems rely on it for active tasks that demand instant grabs. Now secondary storage holds onto files across power cuts and restarts. I find it slower yet steady for keeping programs and records safe over time. But you mix both in machines to balance quick work with lasting saves. And capacity stays tiny in memory compared to those massive drives that pile up terabytes.
You watch costs climb high for speedy memory chips while secondary options stay cheap for bulk. Perhaps access times drag when you fetch from disks instead of chips. I recall how the processor grabs instructions first from memory to avoid waits. But secondary stuff needs copying over before use which eats cycles. Now think about volatility that erases memory contents on shutdowns. You deal with that by loading everything fresh each boot. And perhaps servers lean on lots of memory for running apps without constant disk hits. I notice storage handles backups and archives that memory cannot manage alone.
Main memory acts like a short term scratch pad where you tweak data live. You see secondary as the archive shelf that never forgets. But speeds differ wildly with memory hitting billions of operations per second. Perhaps you test this in benchmarks showing huge gaps. Now architectures blend them so processors avoid bottlenecks from slow pulls. I find memory volatile and pricey per byte while storage grows dense and affordable. And you swap data between them constantly during runs to keep things flowing. Perhaps heat and power use rise with bigger memory setups. I recall how OS handles paging to stretch limited memory using storage swaps. You notice crashes happen more if memory fills up without enough room.
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ProfRon
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Main memory versus secondary storage - by ProfRon - 01-14-2020, 10:35 AM

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Main memory versus secondary storage

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