Re: Oracle Notificacion Server and DCM ports in OracleAS 10gR2
- From: Li-Shan Cheng <exriscer@xxxxxxxxx>
- To: Jurijs Velikanovs <j.velikanovs@xxxxxxxxx>
- Date: Mon, 6 Feb 2006 15:28:08 +0100
With cheap Blades its quite easy to sell these "Enterprise Deployments" :-P
The set up basically is:
2 nodes, Metadata Repository -> Cold Failover Cluster (Serviceguard)
2 nodes, OID -> Active-Active (new in 10gR2)
2 nodes, SSO -> Active-Active (new in 10gR2)
4 nodes, Internet Middle Tier
4 nodes Intranet Middle Tier
I talk to someone who performed a similar 10gR1 installation (15 nodes) in
the summer. I asked him to show me ons.conf of a Middle Tier Server, I
actually saw a line with 14 server names! That is, the server itself talks,
using OPMN, to all servers in the same Farm, which means that port 6200 must
be opened no matter Middle Tier or Infrastructure.
DCM is not that clear noone knows why why the port needs to be opened.
Middle Tier servers communicate between them directly, I believe OPMN is
used to replicate OC4J session states across servers in same Cluster in case
to perform a process failover.
So basically I need to open 6200 (OPMN), 7100 (DCM Discovery Port), 389,
838.
BUT.... I will try to convince the network guy to open all ports at the
Firewall just for installation.
LSC
On 2/6/06, Jurijs Velikanovs <j.velikanovs@xxxxxxxxx> wrote:
>
> Summary:
> You need to open 6200, 389, 636, DB Port from DMZ to Local Network. I
> think Infrastructure Instance doesn't make any connection to "Middle
> Tier Servers".
>
> > I am performing a 14 node Oracle Application Server 10gR2 installation.
> I never have done a 14 nodes installation (3 AS connected Instances
> max) :) But hope my knowledge on the subject will help you :)
> Information below is based on experience and can be not 100% correct.
> I would be glad I you let me point me on any mistakes I have made
> describing things. Anyway lets try to describe how AS management works
> ...
>
> All AS services (components) located on a local host (Apache, OC4J
> Instances, DCM daemon) are managed by local OPMN process. Straight
> after startup any OPMN managed component establishes a connection to
> local OPMN port (6101 by default, but check you opmn.xml or AS Control
> in order to find OPMN Local port number for particular AS instance).
> All local management commands and messages go through OPMN local port
> only.
>
> If you are using AS installation with Infrastructure instance then and
> only then (I am not taking about OC4J clusters in this context) other
> AS instances can communicate messages (including DCM messages) to each
> other.
> In order to do that each AS Instance straight after a local OPMN
> service startup establishes a connection from a local host to the
> Infrastructure instance OPMN process using II OPMN Remote port (6200
> by default).
>
> "Middle Tier Servers" or I would say AS Instances doesn't communicate
> to each other in a direct way. The Infrastructure OPMN process is used
> for that purpose.
>
> BTW: Infrastructure instance doesn't include SSO. SSO Instances
> treated by Oracle as a regular instance ("Middle Tier Servers"). A SSO
> Instance have no a special dedicated communication channel. An
> Infrastructure Instance consist of OID and OPMN processes only.
>
> >> For example, does Middle Tier Servers communicate with
> >> OID and SSO Servers using ONS and DCM? And opposite?
> Middle Tier Servers communicate with the host there Infrastructure
> Instance installed using II OPMN Remote Port (6200), OID ports (389,
> 636), some components (as Portal) use direct connection to a
> repository database (not necessary the same database as infrastructure
> database, but by default is) using DB listener port as well.
>
> Summary:
> You need to open 6200, 389, 636, DB Port from DMZ to Local Network. I
> think Infrastructure Instance doesn't make any connection to "Middle
> Tier Servers".
>
> Bit more about AS you can find in my presentation.
>
> http://www.alise.lv/ALISE/technolog.nsf/0/e40122e5a600ecb4c2256fd90050d122?OpenDocument
>
> Cheers,
> Jurijs
>
>
> On 2/3/06, Li-Shan Cheng <exriscer@xxxxxxxxx> wrote:
> > Hi
> >
> > I am performing a 14 node Oracle Application Server 10gR2 installation.
> I
> > have this setup
> >
> >
> > 2 nodes -> Metadata Repository DB: DMZ 1
> > 2 nodes -> OID: DMZ 1
> > 2 nodes -> SSO: DMZ 2
> > 4 nodes -> MIDDLE TIER for Intranet Accesses: DMZ 2
> > 4 nodes -> MIDDLE TIER for Internet Accesses: DMZ 3
> >
> > Alteon Load Balancers are used for OID, SSO and Middle Tiers
> >
> > Since I have 3 DMZs I have problems with ports settings in the firewall.
> I
> > am clear about how to setup LBR ports however I am not sure how to setup
> ONS
> > and DCM ports between OracleAS Servers.
> >
> > For example, does Middle Tier Servers communicate with OID and SSO
> Servers
> > using ONS and DCM? And opposite?
> >
> > Cheers
> >
> >
> > LSC
> >
>
>
> --
> Jurijs
> +44 7738 013090 (GMT)
> ============================================
> http://otn.oracle.com/ocm/jvelikanovs.html
>
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