[Openroad-users] App Server performance

[Durwin Wright]

The name server is an OpenROAD Server Application that once initialized,
does not do any additional file I/O.  An initiate() method request sends a
request to the OpenROAD Server.  This request either starts an OpenROAD
Server Slave process (ASO) if one is not running already or uses an already
initialized process.  A connect() method request sends a request to the
OpenROAD Server.  This request is routed to the OpenROAD Name Server ASO and
it resolves the AKAName send to the initiate method parameters.  Assuming
that the Name Server is already running (by default it is configured to
shutdown after 60 minutes of idle), the overhead should be between 10 to 40
mSec.  This results of this request to the OpenROAD Name Server are then
used to internally send an initiate() method request to connect to the
target application.

 

The advantage of the connect() method request is that you can refer to an
application by a logical name instead of needing to know the image file name
and the details of the command flags.  I would recommend that connect()
should be the way to go.

 

There are two types of load balancing: (1) Dynamic Load Balancing and (2)
Static Load Balancing.  Each type of Load Balancing is very different.

 

Dynamic Load Balancing is available if you are not using ASOLib.  (Connect()
can be used without the need to use ASOLib.)  In Dynamic Load Balancing, you
specify that two or more Slaves can be started for each OpenROAD
Application.  The OpenROAD Server will then start the additional OpenROAD
Slave processes (ORASO) if needed.  It will also dynamically load balance
between the processes associated with each application.  Each client
Call4GL() method request can be routed to a different OpenROAD Server Slave
process in the pool.  The OpenROAD Server Dispatcher will dynamically pick
the OpenROAD Server Slave process that is the least busy.

 

Static Load Balancing is available only if you are using ASOLib.  In this
scenario, you define two or more application entries with the same AKAName.
The command flags need to be different however.  In each application
definition, you can define one and only one ASO Slave process.  You also
need to leave VASA running to achieve the effects of Static Load Balancing.
When a client connects to an OpenROAD Server application, the static load
balance manager will bind the request to a specific OpenROAD Slave instance.
Each client Call4GL() method request will be routed back to the same
OpenROAD Slave process.  (I am looking at relaxing the need to have a copy
of VASA running to achieve make the Static Load Balancing and ASO
Housekeeping active.  Some of our customers have written applications that
implement these items already.)

 

If you are using the OpenROAD Server, I would encourage you to make sure
that SPOLog is always turned on.  In the OpenROAD 2006 reference guide, I
added documentation that describes these SPO Log events.   Let me know you
need access to this excerpt in case you do not have the OpenROAD 2006 Beta.

 

Durwin Wright | Sr. Architect |  <mailto:Durwin.Wright at ingres.com>
Durwin.Wright at ingres.com | Ingres |
<http://maps.google.com/maps?q=500+arguello+street,+94063&ll=37.487297,-122.
233200&spn=0.004602,0.012771&t=k&hl=en> 500 Arguello Street | Suite 200 |
Redwood City | CA | 94063 | USA  +1 650-587-5523 | fax: +1 650-587-5550 

  _____  

From: openroad-users-bounces at peerlessit.com
[mailto:openroad-users-bounces at peerlessit.com] On Behalf Of Martin Pomej
Sent: Wednesday, November 01, 2006 3:24 PM
To: OpenROAD Users
Subject: [Openroad-users] App Server performance

 

Hello OR world,

 

Talking about windows clients communicating to a windows 2003 server, has
anyone noticed any performance gains by using either a name server
connection ie ASONameServer.Connect or a direct connection ie
RemoteServer.Initiate?

 

I understand that by using a name server you get the advantage of load
balancing, but currently I'm after performance.

 

Regards, 
Martin Pomej 
MyWorkplace Solutions Pty Ltd 
Ph:     1300 733 731 
Mob:    0414 230 845 
Em:     martin.pomej at myworkplace.com.au 
Making Service our Priority 
 <http://www.myworkplace.com.au/> www.myworkplace.com.au 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://peerlessit.com/pipermail/openroad-users/attachments/20061101/24232b3e/attachment.html