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Calculate maximum disk size in Linux

I need to test the tools in terms of their maximum (maximum) disk usage. We noticed that this tool creates temporary files on disk. So, I want to figure out how much of the peak disk space it uses (written in bytes) to store temporary files while it is running.

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The number of bytes written is not necessarily the peak in disk usage.

There are several ways to do this.

1) df

or du

will give you the option to use the disk during this time. If you are doing df

every second it can give you enough information. The process is assumed to take long enough to obtain multiple samples. If it works for you, this is probably the easiest way.

2) If you know which directories or files are being used or created, you can improve on the previous way of using df

or du

by concatenating with inotifywait

instead of hibernating a fixed interval:



while inotifywait -q -e modify filename >/dev/null; do
    df >> df-log-file
done

For details see man inotify

.

3) If you run the program in VirtualBox, create a virtual disk that will be dynamically allocated. The actual file for this VDI will grow when the room is needed. Therefore, the VDI size should be the starting size plus the maximum size of temporary files. I don't know how accurate the result will be.

There must be many other ways to do this.

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