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HPSS Stats

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HPSS Storage
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Mass Storage Statistics at NERSC

We collect statistics about our storage systems so that we can plan for future needs and so that we can report on utilization.  We use HPSS collected statistics, HPSS accounting records and log files provided by the hsi and ftp servers.

Bandwidth/Transfer Activity

  •  Data Rate vs. File Size
  •  Aggregate Transfer Bandwidth
  •  Concurrent Transfers
  •  Transfer Activity
  
This year NERSC's HPSS Storage Systems will transfer almost one petabyte of data.

These graphs each show the data for one day, either as scatter plots, or as line graphs. For most of the graphs, links are also provided for the last 8 days of activity, and for a selected day over each of the last five years to provide a historical perspective. The historical days were the days of highest I/O traffic during each year.

Storage Trends & Summaries

  •  Total Bytes Utilized
  •  Number of Files Stored
  •  Monthly I/O
  •  Number of Tape Mounts
  
Each year the Storage Systems grow by about a factor of 1.7x.
 
The primary graphs here show data by month for the time that HPSS has been in operation. Secondary graphs show 30 days of data on I/O and annual pie charts of the data volume and destinations over the years.

Storage by Scientific Discipline

  •  Total Bytes Utilized
  •  Number of Files
  •  Monthly I/O
  •  Summary of Utilization
These graphs provide a brief summary of storage system use by the principal scientific disciplines as identified by DOE.

HPSS Configuration & Resource Usage by System:
These graphs provide access to the statistics collected by sampling the HPSS metadata. They provide for some interactive data selection. Java is required.
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