Migration Post: 102019

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

03-15-2006

Registered User

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?

new2ss

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LEARN ABOUT OPENDARWIN

afp_signature.conf

AFP_SIGNATURE.CONF(5)						   Netatalk 2.2 					     AFP_SIGNATURE.CONF(5)

NAME

       afp_signature.conf - Configuration file used by afpd(8) to specify server signature

DESCRIPTION

       /etc/netatalk/afp_signature.conf is the configuration file used by afpd to specify server signature automagically. The configuration lines
       are composed like:

       "server name" hexa-string

       The first field is server name. Server names must be quoted if they contain spaces. The second field is the hexadecimal string of 32
       characters for 16-bytes server signature.

       The leading spaces and tabs are ignored. Blank lines are ignored. The lines prefixed with # are ignored. The illegal lines are ignored.

	   Note
	   Server Signature is unique 16-bytes identifier used to prevent logging on to the same server twice.

	   Netatalk 2.0 and earlier generated server signature by using gethostid(). There was a problem that another servers have the same
	   signature because the hostid is not unique enough.

	   Current netatalk generates the signature from random numbers and saves it into afp_signature.conf. When starting next time, it is read
	   from this file.

	   This file should not be thoughtlessly edited and be copied onto another server. If it wants to set the signature intentionally, use the
	   option "-signature user:xxxx" in afpd.conf. In this case, afp_signature.conf is not used.

EXAMPLES

       Example. afp_signature.conf three servers on one netatalk

	   # This is a comment.
	   "Guest Server" 251D25569CB29AFDF296C6B5B3A385B7
	   "User Server" 26B5D785046C019F55718F76B1C13BFB
	   special 74A0BB94EC8C13988B2E75042347E528

SEE ALSO

       afpd(8), afpd.conf(5), asip-status.pl(1)

Netatalk 2.2							    08 Mar 2011 					     AFP_SIGNATURE.CONF(5)