3 ms·

What are the storage requirements for using rr for intense or longer debugging sessions?

• gen220 6y ago
  this paper describes rr, which for context was designed to be used on commodity hardware: https://arxiv.org/pdf/1610.02144.pdf https://arxiv.org/pdf/1610.02144.pdf section 4.4 talks about disk requirements: > Memory-mapped files are almost entirely just the executables and libraries loaded by tracees. As long as the original files don’t change and are not removed, which is usually true in practice, their clones take up no additional space and require no data writes > Like cloned files, cloned file blocks do not consume space as long as the underlying data they’re cloned from persists. they conclude the section with: > In any case, in real-world usage trace storage has not been a concern I imagine that over "longer debugging sessions" the metadata footprint would expand linearly, but probably with a constant smaller than the logs for the average program.
• petergeoghegan 6y ago
  The exact recording in question was about 125MB, and that was after I materialized it using "rr pack". I'd say that the storage overhead is unlikely to be a concern in almost all cases. It's just something that you need to keep an eye on.