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18 Nov 13 - ZDNet - Top 20 mobile skills in demand... Read
09 Sep 13 - telecompaper - Shaspa and Tatung have shown a new smart home platform at Ifa in Berlin. Powered by the IBM Informix software... Read
06 Sep 13 - IBM data magazine - Mission Accomplished - Miami, Florida will be the backdrop for the 2014 IIUG Informix Conference... Read
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28 May 12 - Bloor - David Norfolk on the recent Informix benchmark "pretty impressive results"... Read
23 May 12 - DBTA - Informix Genero: A Way to Modernize Informix 4GL Applications... Read
9 Apr 12 - Mastering Data Management - Upping the Informix Ante: Advanced Data Tools... Read
22 Mar 12 - developerWorks - Optimizing Informix database access... Read
14 Mar 12 - BernieSpang.com - International Informix User Group set to meet in San Diego... Read
1 Mar 12 - IBM Data Management - IIUG Heads West for 2012 - Get ready for sun and sand in San Diego... Read
1 Mar 12 - IBM Data Management - Running Informix on Solid-State Drives.Speed Up Database Access... Read
26 Feb 12 - BernieSpan.com - Better results, lower cost for a broad set of new IBM clients and partners... Read
24 Feb 12 - developerWorks - Informix Warehouse Accelerator: Continuous Acceleration during Data Refresh... Read
6 Feb 12 - PRLOG - Informix port delivers unlimited database scalability for popular SaaS application ... Read
2 Feb 12 - developerWorks - Loading data with the IBM Informix TimeSeries Plug-in for Data Studio... Read
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13 Jan 12 - MC Press online - Informix Dynamic Server Entices New Users with Free Production Edition ... Read
11 Jan 12 - Computerworld - Ecologic Analytics and Landis+Gyr -- Suitors Decide to Tie the Knot... Read
9 Jan 12 - planetIDS.com - DNS impact on Informix / Impacto do DNS no Informix... Read
8 Sep 11 - TMCnet.com - IBM Offers Database Solution to Enable Smart Meter Data Capture... Read
1 Aug 11 - IBM Data Management Magazine - IIUG user view: Happy 10th anniversary to IBM and Informix... Read
8 Jul 11 - Database Trends and Applications - Managing Time Series Data with Informix... Read
31 May 11 - Smart Grid - The meter data management pitfall utilities are overlooking... Read
27 May 11 - IBM Data Management Magazine - IIUG user view: Big data, big time ( Series data, warehouse acceleration, and 4GLs )... Read
16 May 11 - Business Wire - HiT Software Announces DBMoto for Enterprise Integration, Adds Informix. Log-based Change Data Capture... Read
21 Mar 11 - Yahoo! Finance - IBM and Cable&Wireless Worldwide Announce UK Smart Energy Cloud... Read
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9 Mar 11 - DBTA - Database Administration and the Goal of Diminishing Downtime... Read
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25 Jan 11 - PR Newswire - Bank of China in the UK Works With IBM to Become a Smarter, Greener Bank... Read
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20 Sep 10 - planetIDS.com - ITG analyst paper: Cost/Benefit case for IBM Informix as compared to Microsoft SQL Server... Read
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19 May 10 - The New Blog Times - Misurare il consumo energetico: DEHEMS è pronto... Read
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17 March 2010 - Virtualization Review - ...key components of Big Blue's platform to the commercial cloud such as its WebSphere suite of application ser vers and its DB2 and Informix databases... Read
10 February 2010 - The Wall Street Journal - International Business Machines is expanding an initiative to win over students and professors on its products. How do they lure the college crowd?... Read


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IDS Forum

Re: Informix and thin provisioning

Posted By: Andreas Legner1
Date: Wednesday, 13 December 2017, at 12:12 p.m.

In Response To: Re: Informix and thin provisioning (LUIS VENTURA)

Well, there might be an easier solution for this:

before running those big updates, on sblob columns, create a new small
sbspace, modify those sblob columns to use this new sbspace, then run the
update. Your dummy sblob(s) now should reside in new sbspace and old ones
should be completely unused so you can drop them entirely.

Maybe too simple a thought ?

From: "LUIS VENTURA" <luisventurap@gmail.com>
To: ids@iiug.org
Date: 12/13/2017 06:01 PM
Subject: Re: Informix and thin provisioning [40372]
Sent by: ids-bounces@iiug.org

Hi Andreas:

Exactly, what we need is zeroing the free part of the chunks to make this
space available from the storage array point of view.

I know it could sound weird, but I know that this space won't be needed by
Informix. I'll post the full picture to help you understand the exact
situation:

- This is a test environment used to do full restores of our production
database (which actually has 9Tb of blobs)
- Once restored, we run a stored procedure which updates almost all of
these
blobs to the same binary file. Due to the smart blobs way of work this
creates
million of pointers to one file, and free the most of the sbspace area. So,

after running this procedure, we have nine sbspaces with 12Tb reserved
space
but only 300Gb of used space. At the storage array level, I can see 9Tb
occupied, as it has been used during the restore.
- At this point, I would like to return all this free space to the storage
array, as I know that this space won't be used again.

As this is a test environment, we have tried to move all the blobs to the
first sbspace to get the rest dropped and recreated after doing a dd
if=/dev/zero of=/dev/anydev, but for some reason we are not able to
completely
move all the objects (I've opened a case with Tech Support for this, as it
seems that we have some kind of orphaned blobs...)

So, as I cannot drop the chunks, I'd need a way to free this space without
dropping the chunks...

*******************************************************************************

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