Detailed disk usage statistics

From EPrints

I generated the following statistics from a number of active eprints archives on 3 March 2005.

All disk-usage values are in megabytes.

                                             ratio of     average    total                                                
                                  diskspace  liveeprints  diskspace  diskspace used  diskspace  total storage  %of total  
archive    liveeprints  withdocs  used for   to eprints   used per   by archive      used by    needed for     storage    
                                  documents  with         eprint     (documents,     SQL        archive        used by    
                                             documents    with       configuration,  tables     (SQL+archive)  documents
                                                          files      webpages)       
ecs               9049      2433       2327         0.27       0.96            2598         90           2688     86.57%  
soton             4096       928       3174         0.23       3.42            3454         39           3493     90.87%  
akt                171       224        137         1.31       0.61             145          9            154     88.96%  
ebank              105       117        136         1.11       1.16             145          3            148     91.89%  
cogprints         2161      2443       1323         1.13       0.54            1412         58           1470     90.00%  
TOTALS           15582      6145       7097         0.39       1.15            7754        199           7953     89.24%  

This shows that the only significant factor in the storage requirements of an archive is the document storage.

Some archives have more eprints-with-documents than live-eprints. This is because some eprints-with-documents are either not yet approved for the live archive, or have never been submitted for approval.

The average size for an eprint varies but is under 5 megabytes.