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Many storage providers have cost structures that are more complex than simple functions of the total stored bytes: particularly cloud providers have costs associated wth the use of the network to upload and download the stored object. An object that occupies 2 megaBytes might cost far more over time than a 1 gigaByte object, if the former is downloaded 1000 times for every time the latter is. The replication system provides a very rudimentary task to help manage and track these factors: 'org.dspace.ctask.replicate.ReadOdometer'. This task simply displays the readings from the replication system that record cumulative use. The statistics are:*
- total number of objects (AIPS, typically) in the replica store
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- total size of all objects
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- total number of bytes downloaded from the store
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- total number of bytes uploaded to the store
These figures can be used as a means of checking and validating service charges from storage providers.