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IDS Forum

Re: HDR Question

Posted By: Marcus Haarmann
Date: Thursday, 23 November 2017, at 10:56 a.m.

In Response To: Re: RE: RE: HDR Question (BENJI LONG)

Ok, just some steps/checks:

1) preparation of the sqlhosts file is needed
- you need to have minimum one entry for the primary instance, and one entry for the secondary instance.
We keep the file identical on both hosts
The lines should be like:
prim onipcshm localhost localhost
prim_tcp onsoctcp <IP or hostname> <PortNr or Servicename>
sec onipcshm localhost localhost
sec_tcp onsoctcp <IP or hostname> <PortNr or Servicename>

In case you use a hostname, check with ping if the hostname is resolvable.
You might use an IP address instead.
It should not be localhost or 127.0.0.1

In case you use a servicename instead of a portnumber, check the /etc/services file for a correct mapping
e.g. informix 1596/tcp

If you do not use a servicename, put only the portnumber (not the trailing /tcp as in the services file)

2) check if the primary server is available with dbaccess locally, while INFORMIXSERVER env is set prim_tcp
3) check your machine trust, this is in a configurable file named in onconfig with REMOTE_SERVER_CFG setting
https://www.ibm.com/support/knowledgecenter/en/SSGU8G_12.1.0/com.ibm.admin.doc/ids_admin_1407.htm
You should have there a trust on both sides for the other server (prim trusts sec and vice versa)
4) check if the primary server is available with dbaccess from the secondary machine, INFORMIXSERVER again prim_tcp
You should be able to connect without giving a password
5) set the primary instance in master mode using onmode -d primary sec_tcp
6) Now you are reade to start the secondary by a physical restore (ontape -p or the equivalent onbar mechanism) and at the end
onmode -d secondary prim_tcp

Look at the online.log of the primary. It should state something about "secondary connected".
The primary will then start to send the logs which have been used since backup time and inform you
about success with "primary server operational". In the secondary log, you will have the opposite info "secondary server operational".

This is it (normally). Things like how role change is done or setting up an automatic failover have to be learned late on.

Marcus Haarmann

Von: "BENJI LONG" <ruggedmouse@hotmail.com>
An: "ids" <ids@iiug.org>
Gesendet: Donnerstag, 23. November 2017 16:34:40
Betreff: Re: RE: RE: HDR Question [40260]

found something else out.
One way, I'm getting error 908, and the other way I'm getting error 930.

The 930 error is saying it cannot connect to the server name which is in the
sqlhosts file

The 908 error is saying the attempt to connect to the server failed but it
isnt' giving me the name from the sqlhosts file. I'm not sure what it is
giving me. It looks like it is the SERVERALIAS I have in the onconfig file.

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