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IDS Forum

RE: set up a secondary server tutorial info?

Posted By: david@smooth1.co.uk
Date: Friday, 26 January 2018, at 6:40 a.m.

In Response To: RE: set up a secondary server tutorial info? (Alexandre Marini)

I have a simple tutorial for HDR at http://smooth1.co.uk/installs/dbinstalls.html#3.2.2

You could also have an RSS with DELAY_APPLY set.

I will write a tutorial for that over the weekend and improve the one above!

Regards,
David.

> On 26 January 2018 at 11:11 Alexandre Marini <alexandre_marini@hotmail.com> wrote:
>
>
> Hi, Bryce.
> Just found this DeveloperWorks article.
> It is outdated, but the basics are the same, maybe it can give you a clear
> idea of how Informix deals with HA/failover on a cluster.
>
> https://www.ibm.com/developerworks/data/roadmaps/roadmap_ifx_hacluster.html
>
> This is a newer one, about rolling window upgrades (cluster upgrades with no
> downtime, a great feature).
>
>
> https://www.ibm.com/developerworks/data/library/techarticle/dm-1012rollingupgrade/index.html
>
> Hope it helps.
> Best regards.
>
> Alexandre Marini
> IBM Informix Certified Professional v10 / v11.50 / v11.70 / v12.10
> IBM Informix on Cloud - Database Administrator - 2017
> IBM dashDB Managed Service for Analytics and Transactions - 2017
> DB2 Advanced DBA - v10.5 for LUW
> IBM Information Management Informix Technical Professional
> IBM Certified Developer - Informix Genero
> Informix independent consultant
> ________________________________
> De: ids-bounces@iiug.org <ids-bounces@iiug.org> em nome de Andreas Legner1
> <Andreas.Legner1@de.ibm.com>
> Enviado: sexta-feira, 26 de janeiro de 2018 07:59
> Para: ids@iiug.org
> Assunto: Re: set up a secondary server tutorial info? [40580]
>
> First of all: ignore the usual Windows bashing - I'd see no reason to
> believe Informix would be slower or faster than with a different OS on same
> HW, provided proper handling. How nicely Informix integrates into Windows
> is a separate question, but shouldn't affect performance.
>
> HDR probably is what you're aiming at, maybe RSS (more asynchronous, less
> impacting on production). It's a bit more complicated to set up and get
> going on Windows, but it is being used.
>
> 'Same platform' is advised, esp. if same load should be able to run on
> alternate system - in case of fail-over. Exact same OS isn't a must, yet
> Server 2016, afaik, isn't certified yet for Informix (should you find it to
> be doing well with Informix, I'd not object to using it).
>
> There's not really a 'not available for queries but able to be kept in sync
> ' mode with any of Informix secondary types. You might want to look into
> 'continuous log recovery' instead: a restored clone of your production,
> kept in permanent recovery mode applying production logical logs as they
> are being shipped from production. This of course wouldn't be as close in
> sync as any replication type.
>
> Re. IDS versions: recommendation is 'same' - what reasons would you have
> for 'differing'? Certainly major version (11.50, 11.70, 12.10) needs to be
> same, then there are fixpack levels that would play well with each other,
> others less well.
> Then the upgrade question: you'd definitely be better off with two
> systems, even if the standby had to be re-instantiated after the upgrade,
> and with recent versions even that requirement could be avoided.
>
> HTH,
> Andreas
>
> From: "BRYCE STENBERG" <bryce@hrnz.co.nz>
> To: ids@iiug.org
> Date: 01/26/2018 04:30 AM
> Subject: set up a secondary server tutorial info? [40576]
> Sent by: ids-bounces@iiug.org
>
> IDS 12.10.FC9 (workgroup edition)
> Windows Server 2012 r2
>
> Hi,
>
> We have one informix instance for our production database system.
> I'm about to set up a secondary server for the first time. This will be for
>
> failover should the primary server fail, but will be unavailable for sql
> read/write queries to get the benefit of not needing more informix
> licenses.
> It will be on the same network segment and kept in sync as near as
> practicable.
>
> Does anyone know of a good tutorial document that covers everything I need
> to
> know to accomplish this, and the follow on tasks of actually performing
> failovers?
> The administrators guide was confounding and left me unsure of how it all
> hung
> together.
>
> And questions related to this:
> - not available for queries but able to be kept in sync - is that just via
> an
> onmode option?
> - Do the operating systems have to be the same, or can one be running
> Server
> 2012r2 while the other is on Server 2016?
> - Do the IDS versions have to be the same, or just close enough?
> - What happens when IDS is updated, do both primary and secondary need
> updating together to keep synchronised? (this is especially relevant as it
> was
> an update last year that borked our server for about 6 hours. This lead us
> to
> think that having a secondary we could have fired up instead would have
> been a
> good thing, but it would need to still have been on the previous version to
>
> not suffer the same fate as the first server).
>
> Regards,
> Bryce Stenberg
> Harness Racing New Zealand Inc.
>
>
> *******************************************************************************
>
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>
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