On Thu, Apr 25, 2024 at 07:26:41AM +0200, Peter J. Philipp wrote:
> On Thu, Apr 25, 2024 at 12:45:29AM -0300, Gustavo Rios wrote:
> > Hi folks!
> >
> > What is the maximum file size in OpenBSD ?
> >
> > Thanks a lot.
> >
> > --
> > The lion and the tiger may be more powerful, but the wolves do not perform
> > in the circus
>
> There is this comment in /usr/include/ufs/ffs/fs.h:
>
> /* Maximum file size the kernel allows.
> * Even though ffs can handle files up to 16TB, we do limit the max file
> * to 2^31 pages to prevent overflow of a 32-bit unsigned int. The buffer
> * cache has its own checks but a little added paranoia never hurts.
> */
> #define FS_KERNMAXFILESIZE(pgsiz, fs) ((u_int64_t)0x80000000 * \
> MIN((pgsiz), (fs)->fs_bsize) - 1)
>
>
> Now page sizes differ within OpenBSD, so then it depends between 8 TB (4096
> bytes page size) and higher perhaps?
>
> Best Regards,
> -pjp
>
> --
> my associated domains: callpeter.tel|centroid.eu|dtschland.eu|mainrechner.de
>
dumpfs /dev/rsd0a | grep maxfilesize
tells you the answer for a specific filesystem. A mentiomned in the
code commment, it depends on the blocksize used by the filesystem and
the page size of the platform.
-Otto
