Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

File size limits

File size limits

File size limits

Quick question regarding Red Hat 9.0, which applies to all Linux/Unix systems (I suppose). Why is it that I am hitting a limit of 2Gb for file size? Is there any way of increasing this or a workaround? I am using Linux to do some big calculations which create these huge file sizes. When I run the equivalent calculations in windows, the file size reaches 4.5Gb and the calculations finish fine, whereas in Linux the program falls over whenever the file size reaches 2Gb.

Many thanks.

RE: File size limits

I think you may be using the 2.4 kernel, from memory this only supports 2Gb although there were some patches to allow large file support. I believe 2.6 has support for large files, although I think it may still be a compile time option. Maybe a search through redhats support pages would indicate how to go about enabling this - it may involve comiling your own kernel which is always fun.

A search for linux and large file support on google should turn up the details - the following link has some background.


Another possibility is your application or the libraries that it uses may only support 2Gb files?

RE: File size limits

I had a similar problem running into a filesize limit and here is what I found:
1. fat, jffs, jffs2 and romfs only support 2Gb or 4 Gb
2. ext2, ext3, reinsferfs do not specify a max filesize (LFS)
3. jfs, xfs support large filesize
4. the standard linux filesystems support LFS (ext2,ext3, jfs, xfs, etc)
5. programs and libraries that link against GLIBC must be built with LFS
6. the problem might be the libraries that the software linked with.  
RUN:  "nm library | grep seek"  and look for llseek or lseek64
If they are not used in the program then, the library was not built for LFS
Do the same for your application:
"nm myprogram | grep seek"
7. you could copy a 2 Gbyte file over and over again to verify that the OS supports LFS.

hope this helps.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close