[Linux-cluster] centos5 to RHEL6 migration

[Terry]

So here's what I have done so far:
1. Created new cluster based on RHEL 6.
2. Created resources and services from scratch to match that in the old
cluster (fsid, mount points, everything). I am using Congra (luci/ricci)
just to ensure I am using the right syntax.
3. Gave access to storage volumes (iscsi) to new cluster node
4. pvscan/vgscan/lvscan
5. Disabled NFS services on old cluster
6. Enabled the NFS services on the new cluster

That's it.  Life's good for the volumes on the cluster.  I am yet to
transfer my postgres stuff but I am moving from 8.3 to 9.0 so that will be
a new volume and postgres installation so nothing exciting there.


On Mon, Jan 9, 2012 at 8:04 AM, Alan Brown <ajb2 at mssl.ucl.ac.uk> wrote:

> On 09/01/12 13:34, Fabio M. Di Nitto wrote:
>
>  Something i forgot to mention in the other email, is that for example,
>> you can just move the LUNs from your SAN from one cluster to another
>> assuming you are running GFS2 and that will work.
>>
>
> And assuming that you have 2 clusters. This might be a possiblity shortly.
>
>
>  It would be _nice_ to have NFSv4 support working and supported in a GFS2
>>> cluster.
>>>
>>
>> Steven can answer to this one.. but I think the point is more
>> active/active vs active/passive (IIRC from previous discussions).
>>
>
> We break up NFS serving into one service (ip) per FS.
>
> Any given FS is only served from one node because NFSv3 doesnt play nicely
> with anything else, including other instances of itself.
>
> Bringing all the NFS services all onto one node is perfectly possible but
> it's still a bunch of individual services.
>
> Running all NFS on one box turns into a choke point several times/day due
> to the loads involved. The protocol just doesn't scale very well.
>
>
>
>
>
>
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