Re: [Vserver] many ip addys

From: Herbert Poetzl <herbert_at_13thfloor.at>
Date: Fri 21 Oct 2005 - 17:39:41 BST
Message-ID: <20051021163941.GB7203@MAIL.13thfloor.at>

On Fri, Oct 21, 2005 at 12:23:38PM -0400, Chuck wrote:
> On Friday 21 October 2005 12:12 pm, Herbert Poetzl wrote:
> > On Fri, Oct 21, 2005 at 06:58:38AM -0400, Chuck wrote:
> > > i forget.. was it ngnet that would support a few hundred ip addys in a
> > > guest?
> > >
> > > i have a few big machines i cant move over until it can
> > > efficiently support several hundred ip addys (minimum a /24) ...
> > > if ngnet is the answer im gonna try to raise some funding from my
> > > boss .. no promises as he does not let go easily.. :D
> >
> > hehe, well, ngnet will provide that indeed,
> > but for a quick and dirty hack you can raise
> > the limit from the current 16 to something
> > higher, but you should be aware that the
> > current implementation will slow down with
> > every ip address you add ...
>
> hehe dont think that would work as its a quite heavily used email
> server :) if i can get the software people to agree, i could just make
> 12 email guests.. separating the domains and accounts would be a bit
> of a problem but thats one way to do it.. problem is the licensing.
> its commercial software licensed for one machine. i know the ceo
> fairly well from dealing with him directly with bug fixes and feature
> implementations so maybe i can convince him im not trying to stiff
> him and get a multiple machine license for this if i explain the 16
> ip limitation. the other problem ill run into is there will be 12x
> the resource usage of just one.. not good.. maybe ill leave it as a
> separate machine for now.
>
> so then just for clarity, using the current vserver software
> (2.1.0-r4) with up to 16 ip addys does not give any performance hits
> at all compared to 1 but beyond that is when it gets nasty.

no, that is a linear search, so every new ip address
will actually add overhead on every socket bind and/or
ip related operation inside the guest ...

HTH,
Herbert

> >
> http://vserver.13thfloor.at/Experimental/VARIOUS/delta-2.6.9-vs1.9.3-net64.diff
> >
> > (old patch to give you some ideas :)
> >
> > best,
> > Herbert
> >
> > > --
> > >
> > > Chuck
> > >
> > > "...and the hordes of M$*ft users descended upon me in their anger,
> > > and asked 'Why do you not get the viruses or the BlueScreensOfDeath
> > > or insecure system troubles and slowness or pay through the nose
> > > for an OS as *we* do?!!', and I answered...'I use Linux'. "
> > > The Book of John, chapter 1, page 1, and end of book
> > >
> > >
> > > _______________________________________________
> > > Vserver mailing list
> > > Vserver@list.linux-vserver.org
> > > http://list.linux-vserver.org/mailman/listinfo/vserver
> >
>
> --
>
> Chuck
>
> "...and the hordes of M$*ft users descended upon me in their anger,
> and asked 'Why do you not get the viruses or the BlueScreensOfDeath
> or insecure system troubles and slowness or pay through the nose
> for an OS as *we* do?!!', and I answered...'I use Linux'. "
> The Book of John, chapter 1, page 1, and end of book
>
>
> _______________________________________________
> Vserver mailing list
> Vserver@list.linux-vserver.org
> http://list.linux-vserver.org/mailman/listinfo/vserver
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Received on Fri Oct 21 17:39:56 2005

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