[CentOS] Exporting /dev/shm as NFS share?

[Robert Heller]

At Sat, 25 Jun 2011 00:17:19 +0800 CentOS mailing list <centos at centos.org> wrote:

> 
> On 6/24/11, John Hodrien <J.H.Hodrien at leeds.ac.uk> wrote:
> > /dev/shm's how I would do it.
> >
> > Make a file on /dev/shm and the format it, mount it, export it.
> >
> > dd if=/dev/zero of=/dev/shm/export bs=1M count=1000
> > mke2fs -j /dev/shm/export
> > mount -o loop /dev/shm/export /mnt/foo
> >
> > Then export /mnt/foo
> 
> Thanks for this.
> 
> One note though, it does not seem to work if I mount the ramdisk into
> a subfolder and export the parent folder. e.g mount to
> /mnt/test/ramdisk and export /mnt/test would given the same problem.
> But mounting directly to /mnt/ramdisk and export /mnt/ramdisk is OK

When you export a file system, *other* file system mounted under the
exported file system are not exported.  This is normal (and I believe
documented) behaviour of NFS.

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Robert Heller             -- 978-544-6933 / heller at deepsoft.com
Deepwoods Software        -- http://www.deepsoft.com/
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