Appears to be a file format?

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Post #266,146

8/28/06 4:55:12 PM

Appears to be a file format?

Not sure why a file format would make that big a difference in TP.

Post #266,152

8/28/06 4:59:40 PM

My (limited) understanding

In the client server world, applications use a DB engine -- Oracle, SQL Server, Postgres -- which is itself an app that stores data on a filesystem. In the MF world, the app and data are pretty much considered the same thing -- some of the frame guys here talk about "the Foo database" when in fact they mean the entire set of data and all code for accessing it. In that environment, the "filesystem" has as much impact on performance as the DB engine and its associated tuning parameters.

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Post #266,153

by Another Scott

8/28/06 5:07:00 PM

Wasn't that supposed to be one of the magical things about

... the [link|http://en.wikipedia.org/wiki/AS/400|AS/400] OS/400 combo? That is, the DB is intimately tied to the OS and the hardware in ways that Oracle and the like, built on top of the OS, weren't.

If that's the case, then I still wonder where the greybeard in the original post is coming from.

Cheers,
Scott.

Post #266,161

8/28/06 5:27:58 PM

Maybe the 400 was bringing that from the frame world ...

... down to the midrange world. If so, that would support what I was told.

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Post #266,179

8/28/06 6:31:12 PM

Yup "DB2/400" IS the filesystem.

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Post #266,187

8/28/06 6:59:14 PM

As an interesting side note

there are APIs available on warp that let you do the same thing; you can take a physical disk and write a program that will access it directly. You have to create the disk structures yourself, but you can (reportedly) get incredible performance out of the system by doing this.

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Post #266,191

8/28/06 7:15:52 PM

So, explain what "Oracle's Raw Disk Access" is?

Exactly the same DAMN thing. Well, not really but close enough that the miniscule advantage isn't really worth the cost.

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So what's UFAM? - (drewk) - (18) - Aug. 28, 2006, 12:04:21 PM EDT

you sure he said ufam? - (boxley) - (8) - Aug. 28, 2006, 02:49:15 PM EDT

google UFAM mainframe - (drewk) - (7) - Aug. 28, 2006, 02:54:07 PM EDT

Appears to be a file format? - (ChrisR) - (6) - Aug. 28, 2006, 04:55:12 PM EDT

My (limited) understanding - (drewk) - (5) - Aug. 28, 2006, 04:59:40 PM EDT

Wasn't that supposed to be one of the magical things about - (Another Scott) - (4) - Aug. 28, 2006, 05:07:00 PM EDT

Maybe the 400 was bringing that from the frame world ... - (drewk) - Aug. 28, 2006, 05:27:58 PM EDT

Yup "DB2/400" IS the filesystem. -NT - (imric) - (2) - Aug. 28, 2006, 06:31:12 PM EDT

As an interesting side note - (jake123) - (1) - Aug. 28, 2006, 06:59:14 PM EDT

So, explain what "Oracle's Raw Disk Access" is? - (folkert) - Aug. 28, 2006, 07:15:52 PM EDT

Clueless - (broomberg) - Aug. 28, 2006, 03:45:19 PM EDT

Please have the grey beards define UFAM for you. - (folkert) - (2) - Aug. 28, 2006, 05:12:02 PM EDT

So? (Playing devil's advocate) - (drewk) - (1) - Aug. 28, 2006, 05:27:08 PM EDT

HAHA. - (folkert) - Aug. 28, 2006, 07:12:59 PM EDT

Any real definition of UFAM? - (folkert) - (1) - Aug. 29, 2006, 02:23:29 PM EDT

I don't have a dog in that fight - (drewk) - Aug. 29, 2006, 02:27:22 PM EDT

And my MF guru's response: - (broomberg) - (2) - Aug. 29, 2006, 07:21:31 PM EDT

First link on Google seemed to be referencing it - (drewk) - (1) - Aug. 29, 2006, 08:01:56 PM EDT

And when you ask - (broomberg) - Aug. 29, 2006, 08:45:14 PM EDT

Oops. Wrong hat.
74 ms