Extended addressability and RLS are (AFAIK) both supported for the HSMCDS.
There are caveats.

HTH,

-----Original Message-----
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of 
Feller, Paul
Sent: Tuesday, December 18, 2018 12:09 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Multi-volume HSM MCDS [EXTERNAL]

Based on what I've read the MCDS technically can only be on one volume.  Now 
you can have up to 4 MCDS datasets in the HSM configuration.  Each dataset can 
only be on 1 volume.  In our shop we have 4 MCDS datasets defined to HSM and 
each is on its own volume.  We have several lpars sharing the HSM environment 
and yes we use RLS to help control things.

From an IBM manual:
When a control data set is defined on one volume, it is defined as a VSAM KSDS 
cluster.  When the control data set is defined on two to four volumes, it is 
defined on each volume as a unique VSAM KSDS cluster.  DFSMShsm can manage the 
control data set even if it consists of several VSAM clusters.  Based on your 
calculations for the space required to define your control data set, you 
determine the number of volumes that are required and, therefore, the number of 
required clusters.  The MCDS and BCDS may each be on more than one volume; the 
OCDS can be on only one volume.


Thanks..

Paul Feller
AGT Mainframe Technical Support

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf 
Of Hervey Martinez
Sent: Tuesday, December 18, 2018 11:51 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Multi-volume HSM MCDS [EXTERNAL]

The MCDS is taking up a full mod-9 and it is growing.

I'm looking at expanding the file to be multi-volume and wondering if this can 
be done without converting CDS to RLS?  Done some searches but don't really 
come up with anything.

How would this be expanded to multi-volume. Would the definition just be, let's 
say 20,000 cylinders and make sure there are two mod9 volumes available?

One option would be to move it to a Mod-27 but not sure if such a volume is 
available at our DR site.

Anybody have any ideas?

----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions, send email to 
lists...@listserv.ua.edu with the message: INFO IBM-MAIN

----------------------------------------------------------------------
Please note:  This message originated outside your organization. Please use 
caution when opening links or attachments.

----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions, send email to 
lists...@listserv.ua.edu with the message: INFO IBM-MAIN
::DISCLAIMER::
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
The contents of this e-mail and any attachment(s) are confidential and intended 
for the named recipient(s) only. E-mail transmission is not guaranteed to be 
secure or error-free as information could be intercepted, corrupted, lost, 
destroyed, arrive late or incomplete, or may contain viruses in transmission. 
The e mail and its contents (with or without referred errors) shall therefore 
not attach any liability on the originator or HCL or its affiliates. Views or 
opinions, if any, presented in this email are solely those of the author and 
may not necessarily reflect the views or opinions of HCL or its affiliates. Any 
form of reproduction, dissemination, copying, disclosure, modification, 
distribution and / or publication of this message without the prior written 
consent of authorized representative of HCL is strictly prohibited. If you have 
received this email in error please delete it and notify the sender 
immediately. Before opening any email and/or attachments, please check them for 
viruses and other defects.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN

Reply via email to