Data layouts in scalable MOD servers

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  Desired properties

• maximal parallelism
• facilitate interactive control and random access
• simple scheduling schemes

Distributed cyclic layout

• chunk : storage unit, a sequence of consective frames, samples,etc.

•  Advantage: stream requirements can be slowed down by a factor of D

•  different levels of data layout
level-1 :  storage nodes;
level-2 :  local disk array, RIAD-5, etc.