VSAM secondary extents.

Virtual Storage Access method - ESDS, KSDS, RRDS & LDS. Basic direct access method, Basic sequential -, Queued sequential -, Basic partitioned -, Indexed sequential -, Object - access method.
Post Reply
Vasundhara R
New Member
Posts: 1
Joined: Mon Feb 22, 2016 11:15 am

VSAM secondary extents.

Post by Vasundhara R »

I seek a clarification on the below job. This job defines a cluster:= like this:

Code: Select all

//CRTECLUS   EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*                             
//SYSIN    DD *                                    
  DEFINE -                                         
       CLUSTER -                                   
         ( -                                       
             NAME(THE.VSAM.CLUSTER) -                    
             LINEAR -                              
             CYL(9000 9000) -                    
             DATACLASS(DBAGDC) -                   
             VOLUMES(Z3X170 Z2D171) -              
             SHAREOPTIONS(2,3) -                     
         )                                         
/*        


When a download job run, that populates this cluster and it goes to allocate additional extents, it is allocating 540 trks. I thought it would allocate the secondary allocation of 9000 cylinders. What wrong did I guess? Please help.
User avatar
Robert Sample
Global Moderator
Global Moderator
Posts: 1885
Joined: Fri Jun 28, 2013 1:22 am
Location: Dubuque Iowa
United States of America

Re: VSAM secondary extents.

Post by Robert Sample »

Talk to your site support group. Possible reasons include (but are not limited to):
- SMS policy restricting extent size on certain volumes
- the volume only has 540 cylinders available
- storage pool limitations
Post Reply

Create an account or sign in to join the discussion

You need to be a member in order to post a reply

Create an account

Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute

Register

Sign in

Return to “SMS & VSAM and BDAM, BSAM, QSAM, BPAM, ISAM, OAM.”