Using an 'Alias' for a cluster?

wcorsar · New User Joined: 15 Jul 2006 Posts: 6 Location: Florida

I'm trying to see if there is a way to use and 'alias' for a KSDS file. I have a very large file that I need to have various people access from different areas. Rather then making copies, I was hoping to allow all to access the same file but with a different high-level qualified.

I looked into the PATH option as it says you can specify either the AIX or the cluster. Though when I try it on the cluster, I get an invalid related object error. I don't know if I'd have to build a separate AIX for each? Or just 1 and multiple PATH's? The key position should stay the same so an AIX seems redundant.

If anyone has any ideas on how to accomplish this, I'd really appreciate it.

wcorsar · New User Joined: 15 Jul 2006 Posts: 6 Location: Florida

I think I found out my problem. It may have to do with some RACF restrictions and high-level qualifiers here at my installation. I tried the PATH to a CLUSTER again with the same HLQ and it worked so there's something in the names I was using. I look into it some more.

Thanks anyway folks! If you have other suggestions, Iamb happy to hear them.

dick scherrer · Posted: Tue Mar 16, 2010 2:59 am

Hello,

I suspect i'm confused, but how will multiple "names" help with the problem of too many concurrent users?

Robert Sample · Posted: Tue Mar 16, 2010 3:11 am

How are people getting to the file? Batch programs? CICS?

What do you call "very large"?

How many people need simultaneous access? Are these people doing reads only or are there multiple people doing reads and writes at the same time?

What is the update pattern for the file? And how often is it reorganized?

Pete Wilson · Posted: Wed Jul 14, 2010 7:04 pm

I think you can have an alias, without an AIX, similar to NONVSAM aliases. I think the alias name would have to be in the same usercatalog as the base cluster though.

DEF ALIAS(NAME(alias.name) REL(cluster.name)

While accessing the cluster from either the base cluster name or alias I think it would be ENQ'd on the base cluster name so not sure if it would be any use for multi-access.

expat · Posted: Wed Jul 14, 2010 7:10 pm

What are the values specified for SHR

Are we talking CICS & batch simultaneous.

Any information would be greatly appreciated.

PeterHolland · Posted: Wed Jul 14, 2010 10:55 pm

Define ALIAS is for NONVSAM or USER CATALOG objects, so
RELATE(entryname) is the name of the entry (the user catalog entryname or the non-VSAM data set name) for which the alias is defined.

Its all in the manuals, so why ask this question?

dbzTHEdinosauer · Posted: Wed Jul 14, 2010 11:04 pm

PeterHolland · Posted: Thu Jul 15, 2010 8:45 am

Sure Dick,

so we have to be thankfull i guess.

Pete Wilson · Posted: Tue Jul 20, 2010 8:26 pm

It's not ALIAS its the PATH option:

e.g.

DEFINE PATH -
(NAME(A..DSNAME.PATH1) -
PATHENTRY(A.DSNAME.BASE.CLUSTER))

which means you can access the base through the path, no AIX required.