Forte' and Java IOOP in mission criticalapplications.

Question

Hi,
Has anybody had any experience in the development of Java/IIOP/Forte'
applications in large scale, mission critical, environments?
We've developped a full function prototype application and it looks as if
the Forte' IIOP listener could easily become a bottleneck in the overall
architecture configuration: infact we think it is not possible to configure
it for load balancing and/or failover and that any solution in this field
should be carried out outside Forte'.
Any ideas/comments?
Thanks a lot,
Ernesto Moscatelli
SEMAGROUP Italy
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Answer 1

Hi
I've been playing with a variation of the custom router you describe below to
avoid having my server side partitions being pulled onto my client.
Essentially each of my server side partitions registers themselves with a
router set up to service that particular partition. The "clients" then request
a reference to the server side partition from the custom router. This
reference is then used to invoke the services provided by my server side
partitions.
On the box I am testing (RS 6000) my custom router (performing round robin
routing) is between 90ms and 100ms slower the Forte's own router. However,
since my server side partition can be multi-threaded as soon as there are more
tasks requiring the service than there are partitions I start to see a
performance improvement.
While I was testing this (and a few other things) I noticed that it seemed to
be awfully easy to flood a Forte partition (running Forte threads) with tasks
(around 8 as far as I could tell) to the point where the partition seems to
spend all of its time servicing the threads rather than doing any real work.
Does anyone know at what number of tasks the Forte threading model breaks down?
Or, if there are any ways of controlling the "thread processing time".
Cheers,
Darren
From: Scott Irwin <[email protected]>
To: 'Peter Sham (HTHK - Assistant Manager - Software Development, IITB)'<[email protected]>; [email protected]
Cc: [email protected]
Subject: RE: Forte' and Java IOOP in mission critical applications.
Date: 23 March 1999 13:44
We are implementing a Java Bean which communicates via IIOP to our SO. We
didn't like forte's router so we developed a custom 'Intelligent' router.
The Bean first resolves the CustomerRouterSO. The CustomerRouterSO is set
for only Fail-Over. Our real SO that does all of the work is our
ReplicateSO which is load balanced and registers with the CustomerRouterSO.
The CustomRouterSO does not hold state in case it fails. ReplicateSO know
(based on env) if they are primary or secondary type SO and tell the
CustomRouterSO.
In the CustomRouterSO you can add any type of logic you need to determine
which ReplicateSO you want to assign back from the connect(). In our case,
each ReplicateSO keeps a count of the number of clients assigned, and the
CustomRouterSO asks the ReplicateSO if it can handle another assignment.
We needed this type of behavior because our objects are chockfull of state.
If you need Message type duration then it's another game. We are heading
into Stress Test in a few weeks so we will see if this will fly.
Have Fun!
Scott Irwin
-----Original Message-----
From: Peter Sham (HTHK - Assistant Manager - Software Development,
IITB) [SMTP:[email protected]]
Sent: Tuesday, March 23, 1999 4:38 AM
To: [email protected]
Cc: [email protected]
Subject: RE: Forte' and Java IOOP in mission critical
applications.
Hi,
I'm not expert on this field, but if the configuration is like this,
should
this load-balance/failover responsibility be on the shoulder of the
COBRA
ORB, instead on Forte?
Peter Sham.
-----Original Message-----
From: [email protected]
[SMTP:[email protected]]
Sent: Tuesday, March 23, 1999 4:57 PM
To: [email protected]
Subject: Forte' and Java IOOP in mission critical
applications.
Hi,
Has anybody had any experience in the development of
Java/IIOP/Forte'
applications in large scale, mission critical, environments?
We've developped a full function prototype application and
it looks
as if
the Forte' IIOP listener could easily become a bottleneck in
the
overall
architecture configuration: infact we think it is not
possible to
configure
it for load balancing and/or failover and that any solution
in this
field
should be carried out outside Forte'.
Any ideas/comments?
Thanks a lot,
Ernesto Moscatelli
SEMAGROUP Italy
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive
<URL:http://pinehurst.sageit.com/listarchive/>
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive
<URL:http://pinehurst.sageit.com/listarchive/>
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
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