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Distributed Media Storage/Internship report/System characteristics

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This chapter describes some of the performance characteristics of the current system situation. These should be taken into account when making a new design, to have an idea about the order of performance required.

Current statistics

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As of August 15, 2005:

  • File count: 3087418 (~ 3 million)
  • Total size: 197021665938 bytes (almost 200 GB)
  • Mean object size: 63815 bytes
  • Maximum object size: 23610681 (~ 23 MB)
  • Image uploads (writes): < 10 / min
  • Image backend requests (after front-end cache servers): ~ 500 requests/s
  • Cache hit rate: ~ 80%
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