Licensing

[Brian K. White]

On 6/28/2014 7:02 PM, Jean-Pierre A. Radley wrote:
> Mike Schwartz propounded (on Sat, Jun 28, 2014 at 09:48:00AM -0500):
> |
> | >> Fp, in the days of smaller drives, allowed for adding key/data extents to
> | the same or different drives.  Today with the larger drive capacity, the
> | only time one would want to do this is when the file size is nearing the 2GB
> | limit on a 32bit OS.
> | >>
> | >> I don't recall exactly what the naming convention is for these extents.
> |
> | > Yea, please explain what extents is.
> | >
> | > Thanks, Mike
> |
> |
> |       At this point you will have a CUST file that has (roughly) a
> | 1-Gigabyte "key" segment and a 1-Gigabyte "data" segment in it, but the file
> | will contain all the data from your original CUST database and it willlook
> | and operate exactly like your original CUST file did.
> |
> | Hope this doesn't confuse you further...
>
>
> Well, it confused me, a bit...
>
> Mike, you took a database with a key file but a zero-length data file
> and moved about half the key files's fields into the data file.  If you
> reached an OS-imposed 2GB limit in the key file, sure, you would now
> reach the 2GB limit on either the key file or the data file,
>
> But that's not what I ever understood by extents.  FilePro can generate
> (in addition to key and data) keyx1 &datax1, keyx2 & datax2, keyx3 &
> datax3. Instead of hitting a 2GB limit on on a single file, you will be
> limited to 2GB on any one of the eight files, filePro sees the database
> with such extents as having a big virtual concatenated key file (and if
> present, a concatenated data file).

Exactly.

> You need to have additional filesystems to exploit this capability.

We use extents without any extra filesystems.

Or are you just saying the automatic creation only works on separate 
filesystems?

It may be that fp will do something a little more automatic like you
described, automatically creating x2 & x3 if x1 exists and there are 
extra filesystems listed in PFSOMETHINGOROTHER> I've never tried it. But 
we just have one fs and we create the x files ourselves and it works.

And I believe I was wrong about going up to x9. x3 only.

-- 
bkw