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Full Discussion: Migration
Top Forums UNIX for Advanced & Expert Users Migration Post 102019 by new2ss on Wednesday 15th of March 2006 05:27:37 AM
Old 03-15-2006
Migration

Hi all,

Would appreciate advise on my situation.

Currently server A is in production. Server A takes in data from Server X, does some processing and send to server Y. We are going to develop a different system in server B, something like an enhanced version of A. Server A will be retired once server B is commissioned. Server B is also required to take data from server X, does some processing and send to server Y.

What strategy should i adopt?

1) Develop B as a standalone. However, when i conduct end to end testing for B, B must also send results to Y. But because Y is an external server, it cannot take in results from A and B. The data will be out of sync*. If i were to adopt this strategy, how can i seperate the results from A and B ? Meaning, how can i verify that B is crunching the data correctly, and successful sending to Y ( eg, comparision with data from A) and at the same time only trigger the results from A to Y?
****
The reason that the data will be out of sync is because A may be sending
1 2 3,1,2,3
and B is sending 1,2,3.
Something like an summary of A. Y is only interested in unique values, hence B is more optimal
****
2) Develop B and at the same time bring in A. That is, while developing B, make provisions to integrate A. Hence only one copy of the results will be sent out. I can do comparision of the results from A and B.( to ensure B is developed correctly) and send results from A's processing. And if i need to retire A, i just cut of the provisions made earlier.

(2) seems initutive, but more importantly, have i missed out any critical gaps in my planning strategies?
 

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Net::Jabber::Server(3)					User Contributed Perl Documentation				    Net::Jabber::Server(3)

NAME
Net::Jabber::Server - Jabber Server Library SYNOPSIS
Net::Jabber::Server is a module that provides a developer easy access to developing applications that need an embedded Jabber server. DESCRIPTION
Server.pm seeks to provide enough high level APIs and automation of the low level APIs that writing and spawning a Jabber Server in Perl is trivial. For those that wish to work with the low level you can do that too, but those functions are covered in the documentation for each module. Net::Jabber::Server provides functions to run a full Jabber server that accepts incoming connections and delivers packets to external Jabber servers. You can use all or none of the functions, there is no requirement. For more information on how the details for how Net::Jabber is written please see the help for Net::Jabber itself. For a full list of high level functions available please see Net::Jabber::Protocol. Basic Functions use Net::Jabber qw(Server); $Server = new Net::Jabber::Server(); $Server->Start(); $Server->Start(jabberxml=>"custom_jabber.xml", hostname=>"foobar.net"); %status = $Server->Process(); %status = $Server->Process(5); $Server->Stop(); METHODS
Basic Functions new(debuglevel=>0|1|2, - creates the Server object. debugfile debugfile=>string, should be set to the path for the debug debugtime=>0|1) log to be written. If set to "stdout" then the debug will go there. debuglevel controls the amount of debug. For more information about the valid setting for debuglevel, debugfile, and debugtime see Net::Jabber::Debug. Start(hostname=>string, - starts the server listening on the proper jaberxml=>string) ports. hostname is a quick way of telling the server the hostname to listen on. jabberxml defines the path to a different jabberd configuration file (default is "./jabber.xml"). Process(integer) - takes the timeout period as an argument. If no timeout is listed then the function blocks until a packet is received. Otherwise it waits that number of seconds and then exits so your program can continue doing useful things. NOTE: This is important for GUIs. You need to leave time to process GUI commands even if you are waiting for packets. The following are the possible return values for each hash entry, and what they mean: 1 - Status ok, data received. 0 - Status ok, no data received. undef - Status not ok, stop processing. IMPORTANT: You need to check the output of every Process. If you get an undef then the connection died and you should behave accordingly. Stop() - stops the server from running and shuts down all sub programs. AUTHOR
By Ryan Eatmon in January of 2001 for http://jabber.org. COPYRIGHT
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.12.1 2004-08-17 Net::Jabber::Server(3)
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