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Bug in IDS 11+ sysadmin:alertcleanup function fix

Updated June 2020

Fixed in IDS 12.10.xC6 and 14.10: https://www.ibm.com/support/pages/apar/IT09329

Abstract

Bug in IDS 11: This article describes a bug in a function provided with IBM Informix Dynamic Server (IDS) which could result in disk space being filled. We have reported this to IBM who have assigned defect number (APAR) IT09329. Meanwhile, you can fix your system using code provided below.

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Bug in IDS 11+ sysadmin:alertcleanup function fix2020-08-14T13:21:15+01:00

Little known IDS commands: onsecurity

Abstract

Continuing the series of lesser known IDS commands lurking in the bin directory of your Informix installation directory, today we’re looking at onsecurity. It is very important to keep your database server and associated files secure; as well as keeping your data safe, later versions of IDS will refuse to start should the base ownership and permissions be too insecure. If your installation has been moved or copied, or other files or directories been added over time, IDS may not be running in the most secure environment. Shipped with IDS since version 11.50.FC4, the onsecurity utility can check a given directory path is secure, report on any issues found, and can even generate a script to remedy the situation.

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Automatic management of range interval tables

Abstract

Range interval tables can save disk space. If for instance, you wish to keep just a week’s worth of transactions, in order to save disk space perhaps, then it is quite straightforward to use a range interval fragmented table, and whenever you wish you can almost instantly purge any unwanted data by using the DROP or DETACH clause in the ALTER FRAGMENT statement. In any release prior to v12.10 this would have to done manually, as it were (albeit via a cron job perhaps), but now it can be managed entirely by the instance with the ‘rolling window’ functionality, as described in this article.

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Little known IDS commands: onclean

Abstract

In this series of articles we are exploring some of the lesser known, but still useful, commands hidden away in your Informix bin directory. The article explores the onclean utility. It’s often necessary to run more than one database instance on a single server. While this is a useful feature and quite easy to do with IDS, when things go wrong, it’s not always straightforward to tie each oninit binary back to a particular instance, and killing the wrong binary or shared memory segment can be disastrous. Since IDS 11, the onclean utility has been bundled with the server; this useful little program can help take some of the pain out of cleaning up an instance that has not shut down properly, killing only the relevant server processes, and dropping any attached shared memory segments.

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Is the cloud the right place for IBM Informix?

“We saw an increase in computed throughput of 42%” Read how the free version, Innovator-C edition and Workgroup edition compare in a cloud environment when being stress tested by TPC-C benchmark. “The total daily cost was less than the price of 2 cups of coffee”

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Making Microsoft SQL Linked Server and Informix work

Abstract

Microsoft SQL Server is a popular choice for consolidation of report data from multiple database products, as its Linked Server feature – which is included in the base product unlike Informix Enterprise Gateway Manager – makes it possible to access tables in heterogeneous databases within T-SQL via OLE DB. However, there are some settings required to make this work seamlessly, which are described in this article as they are not that obvious.

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AGS: Release 10 New Features Explained

Abstract

Server Studio™ & Sentinel™ — the premiere suite of integrated system management tools for IBM Informix® data servers — has been updated! The new AGS Release 10 of this industry-leading multi-platform graphical development and management environment provides DBAs and developers with an even richer collection of easy-to-use, proven tools to manage complexities of the Informix data servers’ infrastructure — from initial design and development, all the way through to production deployment and successful operational service. This article will visually explain the features, benefits and usage of AGS Release 10.

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How to use IDS on a journaling file system

Abstract

Most modern Linux distributions install a journaling file system, i.e., a file system that keeps track of changes, by default. While providing excellent recovery for standard file types on the disk, such journaling can be significantly detrimental for a database server. Raw devices are becoming obsolete on many distributions, as DIRECT_IO can give comparable performance. Choosing the right file filesystem and appropriate features is an important decision for a database server administrator, getting this right from the start can prevent headaches further down the line. Read on to learn more about a journaling file system:

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Locked tables: how to avoid them

Abstract

You may experience problems with some applications such as Sage Line 500 running on Informix Dynamic Server with High Availability Data Replication (HDR). When running period end or maintenance programs that recreate tables after purging some of the contents, the table may not immediately be available afterwards, creating locked tables and causing the program to crash. This article provides a work-around.

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An Introduction to the IBM License Metric Tool (ILMT)

Abstract

ILMT is an ever increasingly more important piece of software with the growth in usage of virtualized technology. This article provides a brief overview of what ILMT is, why it may be relevant and some considerations with deployment.

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