For sizing purposes I need to understand what requirements an application has to the I/O subsystem. I would love to do what I call I/O sniffing and obtain a list of events from the block layer like this:

initiator XYZ requests block 4711 from device 0815
initiator BLA writes block 1234 to device 9876 

I have been told blktrace was what I am looking for but I cannot get this info from that tool.


Seems like a job for SystemTap, the SystemTap beginners guide by Red Hat has some disk and IO sample scripts to get you started as does sourceware.org.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.