On Thu, 9 Oct 2003, Mike Waychison wrote:
> Ogden, Aaron A. wrote:
>
> >Ouch. As you may know, the limit is *much* lower in linux. Something
> >that I've been struggling with recently...
> >
> >Under normal circumstances I would not be concerned with 'limitations'
> >of a few hundred active NFS mounts, but such limitations certainly limit
> >scalability for the extreme cases.
> >
> >
>
> The maximum number of plain pseudo-block device filesystems on a given
> filesystem is limitted to 256. (This includes proc, autofs, nfs..).
>
> This is because pseudo-block filesystems all use major 0, and each have
> a different minor (thus the 256 limit).
>
> There are however patches floating around (look at SuSe's kernels, I'm
> not sure about RH) that allow n majors to be used (default 5). This
> gives you 1280 mounts, a big step up :)
>
But as Aaron and I know things go pear shaped at just shy of 800 mounts
with RedHat kernels. They have the more-unnamed patch.
So this would indicate that even if there is a device system that can
increase the number of unnamed devices that subsystems like NFS cannot
handle this many mounts.
--
,-._|\ Ian Kent
/ \ Perth, Western Australia
*_.--._/ E-mail: [EMAIL PROTECTED]
v Web: http://themaw.net/
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