Re: ASPs

["James W. Kilgore" <eMail@xxxxxxxxxxxxxxxxxxx>]

Dale,

There were a couple of things I remember: (V3R2)

1) you can not move an object from one ASP to another, you must copy
2) you can not create a joined logical that includes files from
different ASPs


I think that their plan for OS in one ASP and user stuff in another ASP
will perform poorly.  Mainly because of the number of accesses to system
resources would create a lot of activity on the drives of that ASP and
potentially create a bottleneck.  I think IBM created the various SAVxxx
commands and options to eliminate the above reason for creating
unnecessary ASPs.

A more practical use for a separate ASP would be for data warehousing
where the nature of the jobs against large files would impact
interactive seek times.  One ASP for short bursts of data retrieval (OS,
user programs and master files), another ASP for plowing through the
archives.

If you are not doing any data warehousing, IMO, you would be better off
with a single ASP and let the system do the load balancing.  Use
libraries to segregate high/low change entries and use that as a backup
strategy.

I can understand it from the NT guy, NT on the C drive, user data on the
D/E/F/etc. drive(s).  I do that all the time.  So that strategy works
for them.  This isn't NT.  The clients are loading a lot of the stuff
they need from their local drives.  Not from the server.  So there isn't
that much demand on the C drive.

Don't know about mainframe drive arrangement.  Maybe they do this
already.  Spread the OS on 16 raided drives so there's plenty of arms
available to handle the traffic and have the user stuff on another drive
pool.

I'm sure that you'll get about as many different answers on this are
there are active contributors to this list. ;)



D.BALE@handleman.com wrote:
> 
<<snip>>
 but I just wanted to have a clear(er) understanding from those
> on the list with ASP experience to see if there are other considerations I am
> not thinking of.  One that I'm guessing on is that recovery from a DASD
> failure that requires a restore would be much less blood-letting if the system
> were set up using ASPs.  Yes/No?
>
+---
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to MIDRANGE-L@midrange.com.
| To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com.
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---