Our basic problem is that our 64bit Alpha machine is nearly out of space so
we were trying to get a > 2gb file onto the Linux box, which is running
Redhat 6.2 (Linux 2.2.14-12). I am not sure if this kernel can do whatever
it is that needs to be done nor if the gunzip and/or tar can handle it
either.
Our first attempt was to try to FTP the file across. That failed with an
interesting error message: 452 Error writing file: Success
NFS failed for possibly the same reason.
I then split the file into 11 smaller units then moved those over with NFS
with no problem.
When I tried to cat them back together again, I got the problem I originally
reported.
Thanks for the replies.
Dennis M. Gray
Senior Consultant
Complete Business Solutions Australia
-----Original Message-----
From: Andrew Reilly [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, 14 November 2000 15:21
To: [EMAIL PROTECTED]
Cc: GRAY Dennis; '[EMAIL PROTECTED]'
Subject: Re: [SLUG] Problem with cat command
On Tue, Nov 14, 2000 at 02:04:03PM +1100, Rachel Polanskis wrote:
> This sounds like you have hit the 32bit limit with both cat and the
> filesystem. One solution is to run a 64bit OS ;)
Or *BSD, which has had 64-bit off_t etc since '95 or so, even
on 32-bit CPUs. Actual file sizes are limited by the
filesystems to 2^32 blocks, (2TB, I think), and mmap() is
limited to about 2G on 32-bit processors, naturally.
Pretty sure that recent Linux kernels can do similar things,
but don't know whether they just do all filesystem stuff with
uint64_t variables (long long in gcc), or whether they do 32-bit
block operations like the BSDs.
> I guess that doesn't help you much.... The only real workaround
> I can suggest is to cat the files so they are less than 2Gb. You won't
> really be able to do much more (AFAIK - I may be mistaken) as this
> is really a limitation of the OS, filesystem and the application (cat).
I haven't looked at cat's internals recently, but since this
sort of operation (cat) usually goes to stdout, the limitation
should be just what you can do with an open file descriptor.
> We have similar problems with certain Oracle software that
> also balks when it hits the 2GB limit. My suggestion is to upgrade
> to Oracle 8i on Solaris 7 or 8, but of course this is Linux.
>
> Does Linux have a 64bit implementation on the appropriate CPUS?
Pretty sure it does. The BSDs do too.
--
Andrew
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