Portal | Manuals | References | Downloads | Info | Programs | JCLs | Master the Mainframes
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Usergroups Profile Log in to check your private messages Log in
 

 

Datasets too big to be migrated

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> JCL & VSAM
View previous topic :: :: View next topic  
Author Message
GarciaRontani

New User


Joined: 04 Dec 2007
Posts: 12
Location: Argentina

PostPosted: Tue Nov 22, 2011 11:53 pm    Post subject: Datasets too big to be migrated
Reply with quote

Hi Everyone, We are having this issue on one of our customers and we are trying to get a workaround solution for it that would not imply the customer to perform it's own backup/recovery in case this files were to be needed again some day.


I have datasets larger than 1,000,000 Tracks (PS Files) and more than 2 years old. After taking a look at Primary Space Management we jump into the conclusion that HSM cannot handle the migration of such monster files and that's the reason it hasn't migrated them automatically before.

Has anyone faced this problem before? Which solution did you provide??


Thanks for taking your time reading this.
Back to top
View user's profile Send private message

expat

Global Moderator


Joined: 14 Mar 2007
Posts: 8593
Location: Back in jolly old England

PostPosted: Tue Nov 22, 2011 11:57 pm    Post subject:
Reply with quote

Easy peasy .............................

make sure that a HSM backup exists for the dataset and then use
Code:
 HMIG 'dataset name' ML2
Back to top
View user's profile Send private message
GarciaRontani

New User


Joined: 04 Dec 2007
Posts: 12
Location: Argentina

PostPosted: Wed Nov 23, 2011 12:38 am    Post subject:
Reply with quote

Our current version of zOS Limits the number of tapes HSM can handle to 40. Unfortunately we cannot go for that.. Also defining larger scratch tapes cannot be contemplated since we need to act quite fast.. Quite the dilemma
Back to top
View user's profile Send private message
dick scherrer

Site Director


Joined: 23 Nov 2006
Posts: 19270
Location: Inside the Matrix

PostPosted: Wed Nov 23, 2011 1:51 am    Post subject:
Reply with quote

Hello,

Quote:
Quite the dilemma
Or quite poor direction/management.

If the organization wants to support so few hsm tape volumes and does not want to use the high capacity volumes currently available, i suspect you need to do a one-time backup from the dasd to "tape" (i'd use the highest capacity you have or even upgrade so there is a new pool of high density media available). Over time the requirement will probably not diminish.
Back to top
View user's profile Send private message
Pedro

Senior Member


Joined: 01 Sep 2006
Posts: 2038
Location: Silicon Valley

PostPosted: Wed Nov 23, 2011 4:19 am    Post subject: Reply to: Datasets too big to be migrated
Reply with quote

How are the datasets used? Can the user of the data use a concatenation of smaller datasets?
Back to top
View user's profile Send private message
expat

Global Moderator


Joined: 14 Mar 2007
Posts: 8593
Location: Back in jolly old England

PostPosted: Wed Nov 23, 2011 12:58 pm    Post subject:
Reply with quote

GarciaRontani wrote:
Our current version of zOS Limits the number of tapes HSM can handle to 40.

Huh, I've been running HSM since the dawn of z/OS 1.2 and have never met this condition. Please explain. Which z/OS are you running.
Back to top
View user's profile Send private message
Pete Wilson

Active User


Joined: 31 Dec 2009
Posts: 440
Location: London

PostPosted: Thu Nov 24, 2011 10:14 pm    Post subject:
Reply with quote

Yes, there a limit on the size of files able migrate. Have seen it a number of times in recent years. Might be some limit on an OCDS record or something that links the tapes together.
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 -> JCL & VSAM All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
This topic is locked: you cannot edit posts or make replies. SDSF multiple spool datasets extracte... PJAlarcon CLIST & REXX 1 Fri Apr 21, 2017 10:50 pm
No new posts Edit large number of datasets (QSAM) zh_lad TSO/ISPF 3 Tue Apr 04, 2017 6:08 pm
No new posts DUMP DATASETS VS TRACE DATASETS! lind sh CICS 4 Tue Dec 06, 2016 11:31 pm
No new posts Single COPY CICS TS datasets and when... Kyle Carroll CICS 2 Tue Oct 11, 2016 9:47 pm
No new posts How to change dataset attributes of m... ignich7 JCL & VSAM 3 Thu Jul 21, 2016 9:17 pm


Facebook
Back to Top
 
Mainframe Wiki | Forum Rules | Bookmarks | Subscriptions | FAQ | Tutorials | Contact Us