Facebook Ditches DRAM, Flaunts Flash-based McDipper



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Impressive technology. But did they have to name it after a McDonalds side item?



The Library of Congress is only 10 TB?! Even with all those films stored in it for preservation?

This makes that episode of Person of Interest _way_ less interesting ;)



Kinda curious what that kind of usage pattern does for flash longevity...



It sounds like it is mainly being used in their CDN (Content Delivery Network) which would imply relatively static data. That includes things like images and the various HTML CSS and JavaScript files. There would be new files added to the CDN relatively infrequently, which involve clean disk writes to empty sectors. These files would be accessed very frequently which involves pure disk reads. But these files would rarely, if ever, be edited, which involves a disk read, delete, and then rewrite. Those are the type of operations which SSD's have limitations. So in this situation flash longevity is a non issue. We do the same sort of thing at my company... Frequent writes to empty sectors, very frequent reads from those sectors, but nearly zero rewrites of any sectors.

Not to mention, the write cycles of most quality SSD's nowadays are far greater than HDD's. Obviously nowhere close to that of DRAM though.



But when will it be available for us to download and use?



This isn't something that can be downloaded. It's a hardware change completely on Facebook's end of the pipes... Unless you've figured out how to send a phisical hard drive through email... If so, I'm in need of a couple extra TB!

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