What's the best way to write to more files than the kernel allows open at a time?

Posted by Elpezmuerto on Stack Overflow See other posts from Stack Overflow or by Elpezmuerto
Published on 2010-06-16T15:45:50Z Indexed on 2010/06/16 18:02 UTC
Read the original article Hit count: 182

Filed under:

I have a very large binary file and I need to create separate files based on the id within the input file. There are 146 output files and I am using cstdlib and fopen and fwrite. FOPEN_MAX is 20, so I can't keep all 146 output files open at the same time. I also want to minimize the number of times I open and close an output file.

How can I write to the output files effectively?

I also must use the cstdlib library due to legacy code.

Related posts about c++

Which C++ book shold I get between "C++ Primer" vs "C++ Primer Plus"

as seen on Stack Overflow - Search for 'Stack Overflow'
I want to learn C++ by using Vim and MinGW as compiler. I'm interesting at "C++ Primer (4th Edition)" and "C++ Primer Plus (5th Edition)" but I don't know how about it different. It has no book store that I can review those books, so I want to know, what is the different between those book and which… >>> More
C++ : C++ Primer (Stanley Lipmann) or The C++ programming language (special edition)

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a Computer Science degree (long2 time ago) .. I do know Java OOP but i am now trying to pick up C++. I do have C and of course data structure using C or pascal. I have started reading Bjarne Stroustrup book (The C++ Programming Language - Special Edition) but find it extremely difficult esp… >>> More
I need help on my C++ assignment using MS Visual C++

as seen on Stack Overflow - Search for 'Stack Overflow'
Ok, so I don't want you to do my homework for me, but I'm a little lost with this final assignment and need all the help I can get. Learning about programming is tough enough, but doing it online is next to impossible for me... Now, to get to the program, I am going to paste what I have so far. This… >>> More
Managed c++ std::string not accessible in unmanaged c++

as seen on Stack Overflow - Search for 'Stack Overflow'
In unmanaged c++ dll i have a function which takes constant std::string as argument Prototype : void read ( const std::string &imageSpec_ ) I call this function from managed c++ dll by passing a std::string. When i debug the unmanaged c++ code the parameter imageSpec_ shows the value correctly… >>> More
The Definitive C++ Book Guide and List

as seen on Stack Overflow - Search for 'Stack Overflow'
After more than a few questions about deciding on C++ books I thought we could make a better community wiki version. Providing QUALITY books and an approximate skill level. Maybe we can add a short blurb/description about each book that you have personally read / benefited from. Feel free to debate… >>> More

Developer IT

What's the best way to write to more files than the kernel allows open at a time? - Developer IT

What's the best way to write to more files than the kernel allows open at a time?

c++

c

efficiency

fopen

fwrite

Related posts about c++

Which C++ book shold I get between "C++ Primer" vs "C++ Primer Plus"

C++ : C++ Primer (Stanley Lipmann) or The C++ programming language (special edition)

I need help on my C++ assignment using MS Visual C++

Managed c++ std::string not accessible in unmanaged c++

The Definitive C++ Book Guide and List

Related posts about c

Categories cloud