topic Re: Files over 2Gb on Red Hat 7.3 ext3? in Operating System - Linux

Files over 2Gb on Red Hat 7.3 ext3?

Nick Brennan_1 — Wed, 26 Feb 2003 15:10:24 GMT

Does anyone know if it's possible to configure an RH 7.3 ext3 filesystem to be able to handle files over 2Gb in size?

Re: Files over 2Gb on Red Hat 7.3 ext3?

Vitaly Karasik_1 — Wed, 26 Feb 2003 15:35:44 GMT

it works by default, isn't it?

Re: Files over 2Gb on Red Hat 7.3 ext3?

Steven E. Protter — Wed, 26 Feb 2003 19:37:49 GMT

If the filesystem is bigger than 2G its autmatically enabled.

I checked my admin bible and there is no mention of special configuration required.

Best practice is ftp a file bigger than 2G to an fs that has the freespace. If there is an issue, the ftp transfer will hang or fail.

I've got a 16G fs on my Linux servers at my web hosting business and have moved big(> 2G) files on and off without changing the configuration.

SEP

Re: Files over 2Gb on Red Hat 7.3 ext3?

Stuart Browne — Wed, 26 Feb 2003 22:40:28 GMT

I think a quicker (and easier) test is to just use 'dd' to create a local file:

dd bs=1M count=3000 if=/dev/zero of=some.file

create 'some.file' in the current directory of roughly 3gb in size.

It'll either work ('echo $?' = 0), or it'll spit an error ('echo $?' > 0).

Re: Files over 2Gb on Red Hat 7.3 ext3?

Nick Brennan_1 — Thu, 27 Feb 2003 08:45:37 GMT

Thanks all for your responses - the dd created the file fine. The problem occurs when we are trying to create an Oracle dump, I will have to look elsewhere.

Re: Files over 2Gb on Red Hat 7.3 ext3?

Michael Hancock — Thu, 27 Feb 2003 16:06:32 GMT

You should either use the filesize parameter to exp for oracle >= 8.1 or use mknod

From oracle's support site

Export to several files

~~~~~~~~~~~~~~~~~~~~~~~

(Note: Not all platforms support the split "-b" option used here)

% mknod /tmp/exp_pipe p # Make the pipe

% cd /fs_with_25gig_freespace # Make sure disk has space

% split -b2047m < /tmp/exp_pipe & # Split input to 2Gb chunks

% exp user/passwd file=/tmp/exp_pipe full=y # Export to the pipe

This will split the export into several files called 'xaa', 'xab', 'xac'

all of size 2047Mb. These can be fed back into import thus:

% mknod /tmp/imp_pipe p # Make the pipe

% cd /fs_with_25gig_freespace

% cat xaa xab xac > /tmp/imp_pipe & # Put files into the pipe

% imp user/passwd file=/tmp/imp_pipe # And import

Re: Files over 2Gb on Red Hat 7.3 ext3?

Nick Brennan_1 — Fri, 28 Feb 2003 11:58:30 GMT

Thanks Michael, will give that a shot.