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HOW TO EVALUATE ALL-FLASH STORAGE
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lash storage was originally introduced
as a premium performance tier. By
substituting solid-state performance
for mechanical disk drives, you
could quickly and easily accelerate
performance for dedicated databases and virtual
desktop environments. Flash was also widely used
to increase the input/output operations per second
(IOPS) for hybrid systems that used both solid-state
drives (SSDs) and spinning disk drives. However,
the adoption of all-flash systems remained limited
because SSD capacity was simply more expensive
than disk capacity.
More recently, though, the price of flash media
has dropped dramatically. At the same time,
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INTELLIGENTCIO
process improvements in flash component
design have enabled more information to be
crammed into each device, leading to improved
SSD density. The physical capacities of SSDs
have now surpassed those of the largest hard
disk drives, and the capacity advantage is
expected to keep increasing for the foreseeable
future. When combined with inline storage
efficiency techniques, such as deduplication
and compression, the cost of effective capacity
(the amount of logical capacity after storage
efficiencies are applied) for all-flash systems is
now on par with that of disk systems, and all-flash
systems have proven far superior to disks when
comparing operational costs for power, cooling,
space requirements, and management.
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