Hello!
I am quite new to ROOT and trying to determine if this would be a good framework for a project I have. I have a device that is producing packets of binary data at a rate of GB/s, and I need to store this data into some kind of file as quickly as possible. ROOT files seem to have a lot of nice features, specifically GB/s reading and being a compressed binary format, but I was wondering how quickly ROOT can store tabular data?
Thanks!
Hi @clu ,
welcome to the ROOT forum.
@pcanal or @Axel can comment with more authority, but as far as I know the bottleneck is typically data compression or the disk writing bandwidth, not ROOT itself.
(If your application is multi-threaded, the simplest way to not create synchronization bottlenecks is to have each thread write a different file, but there are also solutions for multi-thread writing to the same file).
I hope this helps!
Enrico
Not much to add 
The fastest writing you get is to write uncompressed blobs of your raw bytes to raw FILEs (or mmapped etc). Use ROOT if you want to write structured, columnar data.
Got it, thank you and @eguiraud !