Teraspace Archives

IBM i at 35: A Walk Down Memory Lane

April 26, 2023 Alex Woodie

You may have heard that the IBM midrange platform is turning 35 this year. IBM has a number of events planned in honor of that milestone, culminating with a big birthday bash on June 21. IBM execs gave us a sneak peak of the festivities to come at this week’s POWERUp show in Denver, as well as a technical look back at exactly how we got here.

The day the AS/400 launched in 1988 was notable for several reasons. IBM i CTO Steve Will, who was just starting his distinguished engineering career at IBM, recalls lots of excitement in the …
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Guru: Searching Teraspace

March 5, 2018 Jon Paris

In my previous tip, Sorting In Teraspace, I looked at how the qsort API can be used to sequence data in ways that SortA can’t begin to approach. Now that the data is sorted, one of the things I may want to do with it is to search it. In this tip I will look at how that can be achieved using the bsearch API. The approach I will be discussing allows for partial key searches and handling the fact that such a search may result in multiple hits.

As you will see when we work through the code, …
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Guru: Sorting In Teraspace

January 29, 2018 Jon Paris

In an earlier tip, Teraspace To The Rescue, I discussed how to use teraspace in RPG to permit the storage and manipulation of data that requires more storage than RPG’s 16MB limit. In this tip I am going to discuss how such data can be sorted. Hint: SORTA won’t work!

Before I get to that though, there is one thing I should mention. In that original tip I said: “For reasons I have never understood, DEALLOC will not null your pointer. So it is a good idea to do it yourself. . . .” IBM’s Barbara Morris pointed out, …
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Guru: Teraspace To The Rescue

August 14, 2017 Jon Paris

Hey, Jon:

My team has been trying to resolve a problem for the last few weeks and they are running into several obstacles. The main one has to do with RPG restrictions for data structure length.

We use a third-party program to process transactions. In the latest version, the vendor has increased the length of the fields in the data structure that we have to pass them. After our programs were changed to accommodate this increase, the RPG program would not compile because the DS exceeds 16,733,104 bytes. The vendor has told us to use teraspace but by itself that …
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IBM i at 35: A Walk Down Memory Lane

Guru: Searching Teraspace

Guru: Sorting In Teraspace

Guru: Teraspace To The Rescue

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