JT,
Since
you opened the proverbial can…..let me be to first to eat a few fried
ones J (David, remember THAT
movie????)
The
plan is to have multiple instances AND multiple types of Brokers in future
releases of COSMOS. However, IMHO, we are ways away from that….
Till then, you can say that the Broker / Domain is a conceptual split….
Per
Bill’s earlier email, in i8 they are packaged together…. which drove
my earlier confusion err, I mean queries in regard to this testing scenario…
Thanks,
Jimmy Mohsin
Cell +1-609-635-1703
From: cosmos-dev-bounces@xxxxxxxxxxx
[mailto:cosmos-dev-bounces@xxxxxxxxxxx] On Behalf Of Todd, John A
Sent: Thursday, January 24, 2008 2:40 PM
To: Cosmos Dev
Subject: RE: [cosmos-dev] RE: 216387 - Broker and domain on different
machines
I don’t really mean to reopen a can of big gnarly worms with
more teeth than you can shake a stick at, but....
If the Domain and the Broker are always and only on the same Node,
Why do have both?
I thought the point of the Domain was to tell clients where the
broker lives, and if it always live in the same place the Domain lives...what
up with that?
We’ve been here before, but a refresher reader’s digest
on the logic here would be good.
- John
From:
cosmos-dev-bounces@xxxxxxxxxxx [mailto:cosmos-dev-bounces@xxxxxxxxxxx] On
Behalf Of Mark D Weitzel
Sent: Thursday, January 24, 2008 2:28 PM
To: cosmos-dev@xxxxxxxxxxx
Cc: Mohsin, Jimmy; Muldoon, William H; Ali Mehregani; Devine, John T;
William.Muldoon@xxxxxxxxxxxxxxxxxxxxxxx
Subject: [cosmos-dev] RE: 216387 - Broker and domain on different
machines
Several
questions.
Is there a
reason that this information was not posted on cosmos-dev? I think we
need to make sure that we are being as transparent as possible. For
example, Shivvy is not on this note chain and she's got some good info and
would benefit from this set of mail.
That said....
From the
standpoint of COSMOS, the domain is the enrty point. Going to Jimmy's
scenario:
>>I have a FUNDAMENTAL question about
this defect… Is this even a valid deployment of COSMOS? If I
understand Shivvy right, she was running TWO different instances of
COSMOS… In that case, HOW would instance #1 Management Domain even know
about the instance #2 Broker? Or do we have some sort of an overarching
EPR management or registration that can cross instances???? <<
This is an
invalid scenario for for i8. For 1.0, the domain has only one broker.
Continuing
on...
>>OK cool.. I guess I learnt something new… In this case, if we
have multiple instances of COSMOS running EACH having the Domain / Broker, what
do we do to ensure that only ONE Domain functions and only ONE Broker function?
<<
I'm not sure if
we have anything in place today to handle this specific scenario.
>>Additionally, in this scenario, who manages the EPRs? The client?
And since we have multiple EPRs for a single component (e.g. we have
multiple Brokers), how does the client know which EPR to use? <<
In order to
keep this simple, for 1.0, we said a single instance of the client (or MDR,
Broker, et) knows about a single domain.
-mw
_______________________________________________________________________________________________________________
Mark Weitzel | STSM | IBM Software Group | Tivoli | Autonomic Computing | (919)
543 0625 | weitzelm@xxxxxxxxxx
|
|
|
RE:
216387 - Broker and domain on different machines
|
|
Sheldon Lee-Loy
|
to:
|
Mohsin,
Jimmy
|
01/24/08 01:17 PM
|
|
Cc:
|
Ali
Mehregani, Hubert H Leung, "Devine, John T", Mark D Weitzel,
"Muldoon, William H"
|
|
|
|
The COSMOS UI client has a configuration option in the web.xml that the deployer
would modify to point to a specific management domain.
Thanks,
Sheldon
______________________________________
Sheldon Lee-Loy
Tivoli Autonomic Computing, IBM Toronto Lab
email: sleeloy@xxxxxxxxxx
phone: 905.413.2610
|
"Mohsin,
Jimmy" <Jimmy.Mohsin@xxxxxx>
24/01/2008
01:15 PM
|
|
To
|
"Muldoon,
William H" <William.Muldoon@xxxxxx>, "Mark D Weitzel"
<weitzelm@xxxxxxxxxx>
|
|
cc
|
Hubert
H Leung/Toronto/IBM@IBMCA, Sheldon Lee-Loy/Toronto/IBM@IBMCA, "Devine,
John T" <John.Devine@xxxxxx>, Ali Mehregani/Toronto/IBM@IBMCA
|
|
Subject
|
RE:
216387 - Broker and domain on different machines
|
|
Bill,
OK … so my questions stand….
Team,
Any comments?? Is this even a viable test? If yes, how does the client determine
which instance of the Domain / Broker to use?
Thanks,
Jimmy Mohsin
Cell +1-609-635-1703
From:
Muldoon, William H
Sent: Thursday, January 24, 2008 1:12 PM
To: Muldoon, William H; Mohsin, Jimmy; 'Mark D Weitzel'
Cc: 'Hubert H Leung'; 'sleeloy@xxxxxxxxxx'; Devine, John T; 'Ali Mehregani'
Subject: RE: 216387 - Broker and domain on different machines
Jimmy
I stand corrected; the domain and
broker are packaged together. So as you stated, there are two sets of domain-broker
pairs, one on each machine.
Regards
Bill
From:
Muldoon, William H
Sent: Thursday, January 24, 2008 11:42 AM
To: Mohsin, Jimmy; 'Mark D Weitzel'
Cc: 'Hubert H Leung'; 'sleeloy@xxxxxxxxxx'; Devine, John T; 'Ali Mehregani'
Subject: RE: 216387 - Broker and domain on different machines
Jimmy
My interpretation of the setup is that
Shivy deployed a single domain in tomcat on machine 1 and a single broker in
tomcat on machine 2. We can confirm this configuration when she sends the
registry (or just ask her).
The client can be deployed anywhere but it only knows the EPR of the domain on
machine 1.
Regards
Bill
From:
Mohsin, Jimmy
Sent: Thursday, January 24, 2008 11:34 AM
To: Muldoon, William H; 'Mark D Weitzel'
Cc: 'Hubert H Leung'; 'sleeloy@xxxxxxxxxx'; Devine, John T; 'Ali Mehregani'
Subject: RE: 216387 - Broker and domain on different machines
Bill,
OK cool.. I guess I learnt something new… In this case, if we have
multiple instances of COSMOS running EACH having the Domain / Broker, what do
we do to ensure that only ONE Domain functions and only ONE Broker function?
Additionally, in this scenario, who manages the EPRs? The client?
And since we have multiple EPRs for a single component (e.g. we have
multiple Brokers), how does the client know which EPR to use?
Thanks,
Jimmy Mohsin
Cell +1-609-635-1703
From:
Muldoon, William H
Sent: Thursday, January 24, 2008 11:29 AM
To: Mohsin, Jimmy; 'Mark D Weitzel'
Cc: 'Hubert H Leung'; 'sleeloy@xxxxxxxxxx'; Devine, John T; 'Ali Mehregani'
Subject: RE: 216387 - Broker and domain on different machines
Jimmy
Yes I think it’s valid because
any COSMOS component (domain, broker, data managers, UI) may be deployed on any
node in the network. The domain knows the EPR of the broker because Shivy
specified the domain EPR in step 3:
3. client app on machine 2; broker register command executed with domain EPR
reflecting machine 1;
Broker registered successfully message displayed
Regards
Bill
From:
Mohsin, Jimmy
Sent: Thursday, January 24, 2008 11:20 AM
To: Mark D Weitzel
Cc: Hubert H Leung; 'sleeloy@xxxxxxxxxx'; Devine, John T; Ali Mehregani;
Muldoon, William H
Subject: 216387 - Broker and domain on different machines
Gents,
I have a FUNDAMENTAL question about this defect… Is this even a valid
deployment of COSMOS? If I understand Shivvy right, she was running TWO
different instances of COSMOS… In that case, HOW would instance #1
Management Domain even know about the instance #2 Broker? Or do we have
some sort of an overarching EPR management or registration that can cross
instances????
Thanks,
Jimmy Mohsin
Cell +1-609-635-1703
