Portal | Manuals | References | Downloads | Info | Programs | JCLs | Mainframe wiki | Quick Ref
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Profile Log in to check your private messages Log in
 
File attributes like management class, data class

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> TSO/ISPF
View previous topic :: :: View next topic  
Author Message
kranthikumarb

Active User


Joined: 02 Jan 2009
Posts: 115
Location: Hyderabad

PostPosted: Fri Jan 02, 2009 10:56 am    Post subject: File attributes like management class, data class
Reply with quote

Hi, Can someone clarify the following things?

1. What is the need of Management class and data class and what do they mean actually. ( while allocating a new dataset)
2. How do we set a password to a dataset. What is the use of "Data Set Password . . (If password protected)" in dataset utility menu
3. While allocating a new dataset, we have an option to set "Expiration date". What does it do? I tried using it. I have created a pds on 1-jan-2009 and i gave the expiration date as 2-jan-2009. But the is not deleted/migrated on 2-jan-2009.

Can someone explain these? Thanks in advance
Back to top
View user's profile Send private message

gcicchet

Senior Member


Joined: 28 Jul 2006
Posts: 1703
Location: Australia

PostPosted: Fri Jan 02, 2009 11:13 am    Post subject:
Reply with quote

Hi,

1.
Code:
                      *** The DATACLAS Parameter **                           
                                                                               
     Note: This parameter is used by MVS only if SMS (System Managed           
           Storage) is installed and operational.                             
                                                                               
     The DATACLAS parameter provides the data class to be used for a           
     sequential data set, a PDS, or a VSAM data set that you are               
     creating.  The class name must be one of those pre-established by         
     the storage administrator at your site.  The data class, once             
     defined, provides attributes for the data set that were previously       
     supplied via JCL, such as DSORG, RECFM, LRECL, KEYLEN, key offset         
     SPACE values, RETPD or EXPDT, and certain VSAM SHROPTIONS.               
                                                                               
     The values derived from the DATACLAS can be overidden by the RETPD,       
     LRECL, DSORG, RECFM, KEYLEN, KEYOFF, AVGREC, SPACE, and EXPDT JCL         
     parameters if they are coded on the same DD statement.                   
                                                                               


Code:
MGMTCLAS                                                                       
                                                                               
  Description: MGMTCLAS = Management Class (JCL Keyword)                       
                                                                               
               a) A collection of management attributes, defined by the       
                  storage administrator, used to control the release of       
                  allocated but unused space; to control the retention,       
                  migration, and backup of data sets; to control the           
                  retention and backup of aggregate groups, and to control     
                  the retention, backup, and class transition of objects.     
                                                                               
               b) A policy object that users can bind to each file to         
                  specify how the server manages the file. The management     
                  class can contain a backup copy group, an archive copy       
                  group, and space management attributes. The copy groups     
                  determine how the ADSM server manages backup versions or     
                  archive copies of files. The space management attributes     
                  determine whether files are eligible for migration from     


2. I would steer clear of dataset passwords, let your security packages take care of that.

3. an expiry date just means that the dataset is not eligible to be deleted until the date has expired. Again, if it's a dasd dataset, I would refrain from using expiry dates.

Gerry
Back to top
View user's profile Send private message
Anuj Dhawan

Senior Member


Joined: 22 Apr 2006
Posts: 6258
Location: Mumbai, India

PostPosted: Fri Jan 02, 2009 12:41 pm    Post subject:
Reply with quote

Hello,

Suggest you try IBM Manuals for better understanding of these parameters. Manuals are linked via the "IBM Manuals" link on the top of this page.

By the way for DATACLAS I would like to add, DATACLAS is used primarily by storage management to classify and manage the dasd resource of the organization. This includes allocating the appropriate dasd by data/business classification, defining the migration strategy for datasets by rule to ensure space availabbility, and is often an integral part of the overall backup strategy.
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> TSO/ISPF All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts ISSUE IN copying Sequential file reco... thesumitk JCL & VSAM 2 Wed Dec 13, 2017 3:07 pm
No new posts File Tailoring -- Temporary dataset i... samzee71 CLIST & REXX 3 Fri Dec 01, 2017 3:12 am
No new posts Rexx - File tailoring samzee71 CLIST & REXX 10 Thu Nov 30, 2017 10:47 pm
No new posts Extract record for change in combinat... Trinadh DFSORT/ICETOOL 6 Thu Nov 23, 2017 3:32 pm
No new posts Fetching data from JHS as per the cur... arunsoods All Other Mainframe Topics 4 Wed Nov 22, 2017 1:54 pm

Facebook
Back to Top
 
Job Vacancies | Forum Rules | Bookmarks | Subscriptions | FAQ | Polls | Contact Us