IO Troubleshooting on Linux

Symptoms

  • I have found evidences of IO issues in a Linux File System where Jenkins Home is hosted.

Diagnostic/Treatment

Pre-condition: You get the output from testIO.sh as explained in Required Data: IO.

The aim of this guide is providing minimum values for representative file sizes (and times) to consider a File System as healthy.

Write test

File Size Times Min Healthy Values
1K 10000 1 M/s
10K 1000 5 M/s
100K 1000 100 M/s
10M 100 100 M/s
50M 10 100 M/s
100M 10 100 M/s

Write/Read test

Minimum values for Write/Read are approximately the half of the listed ones in the Write test table.

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