Distributed Media Storage/Internship report/System characteristics

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

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%