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Unlike mechanical hard disks, the capabilities of Flash solid their struggle to keep up with random access patterns such
state storage match quite well with the requirements of in- as those from hundreds of airline passengers. It’s really a
flight entertainment systems. First, Flash SSS has no matter of mechanics. In contrast, some Flash SSS devices are
mechanical moving parts, making the system more reliable currently approaching or even exceeding 100,000 IOPS.
and less sensitive to vibrations and rough landings.This would When several hundred passengers on a large airliner all
allow the IFE to continue playing your movie or game while watch movies, play video games, or listen to music
SSDI SNIA
the aircraft lands and taxies towards the gate, instead of simultaneously, it takes many HDDs to adequately respond,
having to interrupt it 30 minutes or so before you need to but only one small lightweight Flash SSS device can provide
leave the plane. Also, Flash SSS weighs substantially less than all the storage performance needed.
HDD storage, and it uses much less power. SSS processes
around 1,000 transactions per Watt, while HDD processes 5- For passengers, with the huge increase in available bandwidth
15 per Watt. In crowed electronics areas this translates into (random and sequential) provided by SSS, each can request
much less heat and lower cooling requirements. SSS is far to watch their movie of choice and not need to wait until
denser than HDD systems as well, which means it takes up the system collects a number of requests and streams them
less space for the same amount of storage. out together, which is needed in HDD systems to reduce the
effects of random access storage requirements.
Beyond all of these factors, Flash SSS offers much higher
performance than HDDs, for both the random or sequential Conclusions
reads that characterize streaming media entertainment The capabilities offered by solid state storage and the
systems. Flash SSS can handle much higher throughput than requirements of in-flight entertainment systems are almost a
HDD, allowing more entertainment to be served. Also, Flash perfect match. SSS is faster, lighter, denser, more rugged, and
response time, or latency, is much lower than HDD. A less power hungry than traditional HDD systems. But before
spinning mechanical disk finds and reads a block of data in no you rush out to alert the commercial airline industry, don’t
less than 5 milliseconds under optimum conditions. Flash SSS forget about similar entertainment media requirements
responds about 50 times faster, in tens of microseconds.This aboard ocean cruise liners and passenger trains around the
makes a significant difference, especially in random access. world, as well as countless other applications. Additionally,
because of the performance benefits of SSS, a whole new set
Another way to think about throughput or bandwidth and of applications will undoubtedly find their way to in-flight and
latency is to multiply these metrics together to get total on-board entertainment systems.When it comes to solid
random input/outputs per second (IOPS). One hard drive, state storage, it looks like the sky and our imagination are the
even a very fast, relatively expensive one, provides only 100 – only limits.
300 IOPS.The HDD head actuators perform acrobatics in
www.snia-europe.org/solidstate/
The capabilities offered by solid state storage and the
requirements of in-flight entertainment systems are
almost a perfect match. SSS is faster, lighter, denser,
more rugged, and less power hungry than traditional
HDD systems
SEPT 09 WWW.SNS-UK.CO.UK
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