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Distributed Data Storage Model

 

Distributed Data Storage Model

Several parameters are defined to describe distributed storage policy:

1) Backup Reliability: It means file recovery probability from the rest live nodes while some nodes unavailable, marked as R.

2) Node Dependency: It is the ratio of the minimal recovery node average number to the total node number, marked as D. 

3) File Partition: It describes how many parts a file is stripped to, marked as P.

4) Space Redundant: It refers to an average replica number, marked as S.