[vcf-midatlantic] OT: modern cloud services

Dave McGuire mcguire at neurotica.com
Fri Nov 30 14:26:48 EST 2018

On 11/30/18 2:23 PM, Ethan O'Toole via vcf-midatlantic wrote:
> In my research on AWS Glacier it appears they use special hard drives
> that spin at lower speeds, and then power down the disks when full? The
> disks are connected to custom multiplexors. But there might be optical
> or tape in the mix somehow? Another service that makes me wonder how
> they do it.

  I'm sure a lot of it is based on hierarchical storage based on access
patterns.  On some of my clients' systems we've seen some odd (bot not
problematic) delays in accessing some seldom-accessed datasets that can
only be explained by something having been spun down, or migrated off to
higher-capacity, lower-speed storage.  They do have some damn impressive
technology there.

  (of course we were doing that in 1993, but the WAY they'd have to be
doing it, on that scale, is mind-blowing)


Dave McGuire, AK4HZ
New Kensington, PA

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