How would you calculate the size of the working set of storage that would live in a SSD/Flash tier of a tiered/hybrid storage solution? This would be used to gauge the size of the SSD/Flash tier.
By tiered/hybrid I mean something (e.g. a storage array) that presents storage that is made up of different tiers/types of disks such as SSD/Flash, SAS, NL-SAS etc. The 'something' then moves data around between the tiers of disk based on how active it is. More active data moves up to SSD/Flash and colder down to slower tiers.
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