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What would be the best technique to quantify this in GNU/Linux.

Inder Singh
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  • Depends on what do you imply as "sequential/random write". – Zaur Nasibov Dec 19 '12 at 12:17
  • Check this post [link](http://stackoverflow.com/questions/2100584/difference-between-sequential-write-and-random-write) – Sunil Bojanapally Dec 19 '12 at 12:18
  • It sounds like what you want is to execute a process, sample io access activity, and then analyze that to see if it is sequential or random. Is that correct? Could you provide more information about exactly what you want and what you are trying to do. – Andrew Tomazos Dec 19 '12 at 12:23
  • @SunEric, yes, but are we talking about writing to the same file, writing to many files, or writing in 'raw' mode, directly to a device (`dd`-style). – Zaur Nasibov Dec 19 '12 at 12:25

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This is not exactly an answer but..

If you mean writing to a file, you can use strace and look for pwrite or lseek + write combination. Check for offset in pwrite or lseek to figure out its sequential or not.

Rohan
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