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Re: [Linux-cluster] Did you use GFS with witch technology?



Andrew,

Many thanks for your time!

What value of 'divider' did you use? I'll put the same, 'cause its
already tested :-p

Best regards!

-- 
Tiago Cruz <tiagocruz forumgdh net>


On Tue, 2009-06-30 at 12:26 -0600, Andrew A. Neuschwander wrote:
> The tick divider first showed up in RHEL 5.1. It is a kernel command 
> line option. Search for 'divider' in the release notes 
> (http://www.redhat.com/docs/manuals/enterprise/RHEL-5-manual/release-notes/RELEASE-NOTES-U1-x86-en.html).
> 
> Multicast works fine for me. I have 4 virtual and 1 physical members in 
> my gfs cluster. The VMs are split onto two ESX nodes (along with 20+ 
> other VMs). The physical/virtual ethernet switching works fine. But I 
> did make sure the GFS VMs are using the vmxnet driver, as it has a lower 
> latency than the other virtual nic driver. My gfs volumes consist of 
> about 14TB of 4Gbps FC SAN LUNS.
> 
> -A
> --
> Andrew A. Neuschwander, RHCE
> Systems/Software Engineer
> College of Forestry and Conservation
> The University of Montana
> http://www.ntsg.umt.edu
> andrew ntsg umt edu - 406.243.6310
> 
> 
> Tiago Cruz wrote:
> > Hello Andrew! Many thanks for your reply!
> > 
> > It's very good to see an environment like my!
> > 
> > I'm using RHEL 5.2 with kernel-2.6.18-92.1.22.el5... can you explain a
> > little bit around this trick divider?
> > 
> > I'm usually have 2-3 IBM x3850 (16 cores CPU and 128 GB RAM) with 10-15
> > virtual machines running under GFS, with a LUN ~500 GB SAN.
> > 
> > My problem happens when Multicast:
> > 
> > 	Switch -> GFS -> Switch = OK
> > 	vSwitch (Box_A) -> Switch-> vSwitch (Box_B) = NOK
> > 
> > Did you have some problem with? If I put all VMs inside the same box
> > (vSwitch Box_A -> vSwitch Box_A) I don't have any problem...
> > 
> > Thanks a lot!
> > 
> 
> --
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