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Amazon Boosts High-Speed I/O Instances With SSDs
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Tweeks_
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Tweeks_,
User Rank: Apprentice
12/31/2013 | 2:16:57 PM
Re: SSDs and cloud: meant for each other
That's nuts. You're either talking about tens of Gigs (or more) being instantly read/written to/from either SSD or cheap drives.  You going to magically migrate that data on demand?  Or mirror it (at different speeds)? At that point.. what's the point?

Probably the BEST way to do it is to separate high speed filesystem space from low-speed filesystem space and offer customized preconfigured setups. Dynamic gear shifting just doens't make sense here

 

Tweeks
cbabcock
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cbabcock,
User Rank: Author
12/27/2013 | 12:26:23 PM
Re: Aditshar and non-volatile
Re: Aditshar. "Non-volatile" means the data won't be lost when the power is shut off. The NAND-based SSDs manufactured today are non-volatile. Solid state memory used for RAM is typically built from chips that are volatile. The data disappears and can't be recovered when the power disappears, although some manufacturers build solid state devices using volatile memory chips, then include a backup supply of power in the event of power loss through a battery. It only takes a trickle of power to maintain the data, so the battery serves well as long as the outage is short.

 
aditshar
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aditshar,
User Rank: Apprentice
12/25/2013 | 5:28:02 AM
Re: Are SSDs commodity parts yet?
If we talk about SSD, A typical SSD uses what is called NAND-based flash memory, but one question which i guess is most common as well, What does non-volatile mean ?
Charlie Babcock
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Charlie Babcock,
User Rank: Ninja
12/24/2013 | 2:04:36 PM
Are SSDs commodity parts yet?
That's a good point, David, this could be done proactively by the cloud service. But so far, SSDs have been too pricey a component to make it into many cloud architectures. First they appeared as a paid for service, where the use had the option of selecting a quality of service level for his I/O operations. Then DigitalOcean and others incorporated them into basic cloud servers as a standard feature, without extra charge. For the time being, cloud providers will keep services bare bones and go for the maximum number of users at the lowest possible price. But they could evolve more and more sophisticated I/O ops and storage system choices. But SSDs will have to become commodity parts for that to happen on a large scale.
David F. Carr
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David F. Carr,
User Rank: Author
12/24/2013 | 1:59:01 PM
Re: SSDs and cloud: meant for each other
Can you see this choice being abstracted away? I think in the long run what you'd want are intelligent storage systems that choose the correct media automatically based on the needs of an application.

Naturally, you'd always want the option of making that choice yourself. But shouldn't cloud operating systems start to do optimizations of this sort more proactively?
cbabcock
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cbabcock,
User Rank: Author
12/24/2013 | 1:43:20 PM
SSDs and cloud: meant for each other
Solid state disks are extremely popular with cloud users for their ability to reduce load times, speed response times. With their known failure rates, they need to be managed by the cloud software that can anticipate hardware failures. But that's what a well-architected cloud is designed to do anyway, with or without SSDs.


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