"measurements of a distributed file system"
Mary Baker, John Hartman, Michael Kupfer, Ken Shirrif, and John Ousterhout
pp. 198-212, SOSP, 1991

Files are short, opne only for brief periods of time (1/4 second).
Most accesses are sequential.

Large files are bigger and throughput very bursty.

read hit ratios have improved, but they
don't do much for write traffic because
new bytes get written to server to safeguard the data.
This makes log-structured files more attractive.

"Analysis of File I/O traces in Commercial Computing Environments"
K. K. Ramakrishnan Prabuddha Biswas, Ramakrishna Karedla
rama@erlang.enet.dec.com

Few files get most of the traffic.
Median file size is 1-3.5 kilobytes across all environments.
2.1\% of the active files account for 98.6\% of all read operations.
2\% of the files account for 80-87\% of all write operations.

read:write ratio is in 3 to 5 range (3 - 5 times more reads than writes).

