Types of Spaces Retention quality Retention quality – Custodial (High quality) – Output (Middle quality) – Replica (Low Quality) Access latency Access latency – On-line [Immediately available to the application] – Near-line [Requires latency before data can be accessed] lifetime Spaces can be reserved for a lifetime – No limit on number of spaces Space reference handle Space reference handle is returned to client space token description A space token description is a tag that identifies a chunk of space with given characteristics (such as its storage quality, size, protocols supported, etc.) permissions and allowed operations on spaces Nothing is specified concerning permissions and allowed operations on spaces.
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