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IDS Forum

Re: Reasons: Crashes of all supported IDS versions

Posted By: Art Kagel
Date: Tuesday, 24 July 2012, at 8:18 p.m.

In Response To: Re: Reasons: Crashes of all supported IDS versions (Fernando Nunes)

I agree with Fernando. You are just as likely to hit a bug that no one has
ever hit before in an older 'stable' version as in a just released one with
the exception of new features of course. That's because if you do find
such a bug it will be because you are doing things differently from
everyone else using the product. Also note that since IBM took over
Informix the regression testing suite has grown enormous! Every bug that
has been reported and 'fixed' is added to the regression test suite so that
the testers can determine whether an old big has accidentally been
reintroduced (a common problem in the pre-IBM days BTW - less so now). Are
there new bugs in new versions? Sometimes, most often, as Fernando said,
in new features - take the new Readahead algorithms in 11.70 as an
example. This wasn't working correctly for every user until 11.70.xC5 -
the latest fixpack. On the other hand, 11.50.xC1 was good to go with no
performance issues and few critical bugs out of the box (the first six
fixpacks however included new features that were more buggy than anything
in .xC1). So, while waiting for the first couple of fixpacks is not a bad
strategy, why wait several years to be able to take advantage of what 11.70
offers over 11.50 and earlier releases, including:

- 10-15% better performance on most queries

- New Forest of Trees Indexes

- New Multi-Index processing of a single table

- Two new DW Join paths

- Two new fragmentation schemes that reduce maintenance of high growth

rate tables

- Storage management improvements

- Arrange automatically for chunks to be added to dbspaces when storage

gets tight

- Configure filesystem based chunks to automatically expand when

filled

- Online very low overhead table defragmentation

I have one client who likes to have the latest and greatest and they are
always no more than two fixpacks behind the bleeding edge. They went with
11.50.FC1 and 11.70.FC1 and are now on 11.70.FC4 and thinking about .FC5.
They have no regrets.

Art

Art S. Kagel
Advanced DataTools (www.advancedatatools.com)
Blog: http://informix-myview.blogspot.com/

Disclaimer: Please keep in mind that my own opinions are my own opinions
and do not reflect on my employer, Advanced DataTools, the IIUG, nor any
other organization with which I am associated either explicitly,
implicitly, or by inference. 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 Tue, Jul 24, 2012 at 7:49 PM, Fernando Nunes <domusonline@gmail.com>wrote:

> On Tue, Jul 24, 2012 at 11:03 PM, FRANK J. COMPUTER <
> frank_in_pr@hotmail.com
> > wrote:
>
> > This is an example of why I recently asked on the IIUG/IDS Forum, the
> > question
> > "Reasons: Crashes for supported IDS Version", so that we could share our
> > experiences, other than what's on the Machine/Release Notes and Bug
> > Reports.
> >
> > This makes me wonder how long 11.70 was alpha and beta tested, before
> being
> > released for market distribution.. Are users "pseudo-beta" testing it
> now?
> >
>
> I would not say that, and I'm sure that there are many happy 11.7 users
> (Andrew Ford is a public example - 400+ days of uptime)
> Also latest Informix major releases benefit from public beta periods.
>
> >
> > The more complex a piece of software becomes, and IDS certainly is, the
> > more
> > possibility for a failure! All it takes is one little mod to break
> > something
> > complicated. That's why I never rush to upgrade from a stable version to
> > newer
> > versions of anything until it has been beaten-up on for a couple of
> years!
> >
>
> I've written this before, but here I go again... I totally agree with the
> principle of caution. But that rule of "whatever period" is (pardon me)
> nonsense.
> Let me explain why. Over the period of two years you'll see a big number of
> fixpacks. I'd say we're launching 3 or 4 per year. So 6-8 is a very
> realistic number...
> In fact, two years is nearly the major version lifecycle (2007 11.1, 2008
> 11.50, 2010 11.7, ...). So after two years of a major version, which
> fixpack will you choose? The latest? That's only around for a few months,
> and new fixpacks bring new features and not just bug fixes...
>
> The truth in my opinion is that there are good and bad fixpacks... I
> remember particularly 7.31.UD1 and 10.00.FC7... and in any case I still
> find customer who used (or still use) them for long time... The real
> question is: All versions have bugs... which ones will you hit? You can be
> happy with a version for years that caused enormous issues on another
> customer... And this brings us to the two trouble points:
> 1- The software should not have bugs (my feeling is that latter versions
> tend to have bugs mostly on new features). This point if the responsibility
> of the software maker (and these two points are generic in my view)
> 2- How will you be able to test the versions on your environment and how
> much will it cost you?
>
> --
> Fernando Nunes
> Portugal
>
> http://informix-technology.blogspot.com
> My email works... but I don't check it frequently...
>
> --20cf3074d3e4e03e7404c59c02b8
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--f46d042ef65f267daa04c59c6ac2

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