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IDS Forum

Re: HDR crashed after upgradation

Posted By: Art Kagel
Date: Friday, 11 September 2009, at 9:55 a.m.

In Response To: Re: HDR crashed after upgradation (POONAM TANDEL)

Your procedure is correct. I would only add that I would have done only one
thing different. I would install the new version BEFORE shutting down the
existing instances but install into a different directory. I always use a
soft link for INFORMIXDIR and point that to the actual install directory.
So, I would install the new release in a new directory - say
/opt/informix/ifmx.11.50.FC5 - then:

- Shutdown all instances.

- Link the value I use for INFORMIXDIR away from the prrevious install

directory - say /opt/informix/infmx.11.50.FC4 - to now point to the new

install directory.

- Restart all instances.

This method has several advantages:

1. Reduces downtime to seconds instead of from 10 minutes to an hour if

you have to wait for the installs to complete.

2. You still don't have to change any scripts or have users reset their

environment

3. You can revert to the previous version in the same several seconds by

simply:

1. For major upgrades run the onmode reversion to the previous

release. Not needed for minor release upgrades.

2. Shutdown

3. Relink INFORMIXDIR to the old release

4. Restart the servers using the older software

5. Optionally, drop and recreate the support databases: sysmaster,

sysadmin, sysusers - in case these were updated by the new release.

But that has nothing to do with your problem, I know. Yes, IB that the
shutdown did not complete correctly and left some partial logical log
record. That inconsistency is what is confusing the engine at startup. IBM
can connect to your system and truncate the last logical log to a point
where the engine will be able to complete fast recovery successfully. You
might lose a transaction or two, but since you were performing a controlled
shutdown that is unlikely.

Art

Art S. Kagel
Oninit (www.oninit.com)
IIUG Board of Directors (art@iiug.org)

Disclaimer: Please keep in mind that my own opinions are my own opinions and
do not reflect on my employer, Oninit, the IIUG, nor any other organization
with which I am associated either explicitly or implicitly. Neither do
those opinions reflect those of other individuals affiliated with any entity
with which I am affiliated nor those of the entities themselves.

On Fri, Sep 11, 2009 at 9:43 AM, POONAM TANDEL
<poonam_tandel28@yahoo.co.in>wrote:

> HI Art
>
> did u mean that that crash happend becz i didnt shutdown the primary
> database
> properly.
> I thought that the crash happend becz of the way i upgraded the databases.
> To upgrade the database i have performed the following steps.
> 1) Shutdown the HDR and SDS instances
> 2) Shutdown the Primary database
> 3)Installed the binaries on all the databases
> 4) Started the primary database
> 5) Then started the SDS and HDR
>
> Is this a right way to upgrade the database in MACH11 cluster?
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--001517448ad24911ee04734dabb9

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