|Message: Event size in storage with extended/persistency example||Not Logged In (login)|
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I am using the G4PersEx01 example from examples/extended/persistency to add ROOT persistency to my simulation.
While running the example using G4 version 7.1.p01 I noticed that the file size does not grow linearly with the number of events written.
This is the file and event size I get when I run the example with different number of events:
1 evt 6 KB -> 6.0 KB/evt 100 evt 552 KB -> 5.5 KB/evt 1000 evt 4.8 MB -> 4.8 KB/evt 5000 evt 30 MB -> 6.0 KB/evt 10000 evt 65 MB -> 6.5 KB/evt 50000 evt 455 MB -> 9.1 KB/evt
In addition, as each hit consists of 4 float quantities, and as each event has 2 to 8 hits (I am using the default .mac file with 30 MeV positrons), I would expect an average events size of ~80 bytes (5x4x4), so I cannot understand where this 6KB+ per event comes from.
It is clear that I am missing some basic information here. Can anybody explain what I am seeing?
Thank you very much
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