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Apple iTunes: Streaming

SSD Performance In The Office: Nine Applications Benchmarked
By

Overall Statistics
Apple iTunes: Streaming
Elapsed Time
21:28
Read Operations
1183
Write Operations
155
Data Read
1.45 MB
Data Written
6.08 MB
Disk Busy Time
0.11029 s
Average Data Rate
68.28 MB/s


Several of us in the lab enjoy listening to music while we work, and we expect that many of you do as well. However, given that we generally run multiple systems in the lab and at home, it's often easier to stream music over the network rather than maintain multiple local copies of our music library. That's why our trace involves 21 minutes of streaming playback using iTunes.

Even though the audio files we're playing add up to over 30 MB, none of it is written to the local drive. Instead, iTunes buffers the data in RAM, and once it's played, the program ejects information from memory. Hence, the little storage activity that does occur is due to iTunes accessing application data and the operating system writing to log files.

I/O Trends:

  • 88% of all operations occur at a queue depth of one
  • 90% of all operations are random
  • 64% of all operations are 4 KB in transfer size


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