[Vm-dev] Cog issue? Re: [Pharo-project] StandardFileStream size limit?

[David T. Lewis]

On Wed, Jun 13, 2012 at 04:08:14PM +0200, G?ran Krampe wrote:
> 
> Hey!
> 
> Ok, so the plot thickens:
> 
> If I run this in a "oneclick 1.4" I will get a file write error on 2Gb:
> 
> | f b |
> f := StandardFileStream newFileNamed: 'test'.
> b := ByteArray new: 1024*1024*100. "100Mb"
> [30 timesRepeat: [f nextPutAll: b]] ensure: [f close] "3Gb"
> 
> 
> ...but it worked fine using a self built "standard" VM from squeakvm.org 
> (4.4.7.2357)! Same image btw.
> 
> Now, does it work with the bleeding edge Cog? Tried r2556 and nope, same 
> problem.
> 
> So I "guess" it is a Cog thing? I haven't tried building Cog from source.
> 
> regards, G?ran

Background on large file support, see especially Bert's summary:

http://forum.world.st/Re-squeak-dev-filesize-reporting-0-for-very-large-files-td4483646.html
http://bugs.squeak.org/view.php?id=7522
http://www.suse.de/~aj/linux_lfs.html

I'm not sure if the Cog VMs are being compiled with the the LFS option, although
I expect that if you compile it yourself with the build options that Bert explains,
then it should start working.

Dave