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Turns out, in case of a fail-over to another box, only the *BLKSF gets copied over - the files already have to have been brought over somehow into the UDFS on the fail-over box. I don't know more - did a search at www.iseries.ibm.com/support (improved search) on "user defined file system" and found this in "More technical information", I think.

Vern

At 10:56 AM 4/30/2004, you wrote:
Hi, Richard

A UDFS is the only way to get IFS files into another ASP. The root is always ASP 1. So that's one reason.

I can also see advantages if you have varying search paths, with a mounting point for the UDFS in each, so you'd unmount from one and mount to the other. Maybe ;-)

I don't think a UDFS is accessible until you mount it. Could be wrong. It's a *BLKSF (block special file). I mounted one and put an obect into it at the mount point. The attributes of the *BLKSF did not change.

Make any sense?

Vern

At 09:39 AM 4/30/2004, you wrote:
Hello All,

I have a question on the UDFS (User Defined File System) for the AS/400
and iSeries.

Why would I want to use a UDFS as opposed to putting PC files directly
into IFS directories ?

Does it speed up file backup by putting PC files into a simulated disk ASP
and then treating the UDFS object as a single object just like the
Integrated PC Server (FSIOP/IPCS/IXS or whatever it's called today) would.
It's a nice concept, but I need some confirmation on what the advantages
are.

The iSeries documentation on the UDFS and where it's best used are very
sketchy.

>From my initial testing it seems more cumbersome because you have to
create the UDFS and make sure it's mounted before use.

Any input would be appreciated.

Regards,
Richard Schoen
RJS Software Systems Inc.
"The AS/400 and iSeries Report and Data Delivery Experts"
Email: richard@xxxxxxxxxxxxxxx
Web Site: http://www.rjssoftware.com


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