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ESSPRABHU
New User
Joined: 11 Oct 2005
Posts: 22
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one of our jobs is creating a temporary dataset with the following parameters :
DISP=(NEW,CATLG,DELETE),
UNIT=SYSDA,
SPACE=(TRK,(50,10),RLSE),
DCB=(RECFM=FB,BLKSIZE=0,LRECL=615)
But now it's required to store the dataset permanently.
with minimum changes i have to do this.
Prabhu. |
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Aaru
Senior Member
Joined: 03 Jul 2007
Posts: 1287
Location: Chennai, India
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| Quote: |
| DISP=(NEW,CATLG,DELETE), |
As per the DISP position your dataset would get catalogued if the job runs fine and get deleted if it abends.
Usually temporary dataset would have PASS specified in the DISP Position. |
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Anuj Dhawan
Superior Member
Joined: 22 Apr 2006
Posts: 6248
Location: Mumbai, India
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| ESSPRABHU wrote: |
| But now it's required to store the dataset permanently. |
Hi,
I didn't understand this, can you please repharse this sentence. Where do you want to 'store' ? What's the meaning of 'store' ? |
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murmohk1
Senior Member
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Joined: 29 Jun 2006
Posts: 1436
Location: Bangalore,India
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Prabhu,
| Quote: |
one of our jobs is creating a temporary dataset with the following parameters :
DISP=(NEW,CATLG,DELETE),
UNIT=SYSDA,
SPACE=(TRK,(50,10),RLSE),
DCB=(RECFM=FB,BLKSIZE=0,LRECL=615) |
Could you post the entire DD statement declaration. |
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silentarya
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Joined: 11 Mar 2007
Posts: 35
Location: Chennai
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| I did not understand the issue ... Howevr, If u want a permanent dataset just give a dsn name ... If the issue is something else plz write in detail ... |
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ESSPRABHU
New User
Joined: 11 Oct 2005
Posts: 22
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Hi,
Now the dataset is being stored temporarily on DASD, means after few days it is getting deleted automatically. so for the next subsequent job which access this dataset (which will run after some days), this dataset is not available.
But we want to keep the dataset permanantly without getting deleted automatically.
For that can I use the UNIT parameter as UNIT=PERMDA.
Apart from this change , what changes should I do. |
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saptagiri kintali
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Joined: 21 Sep 2007
Posts: 20
Location: chennai
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| check by giving disp=(new,keep,keep) .i think this will work. |
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Anuj Dhawan
Superior Member
Joined: 22 Apr 2006
Posts: 6248
Location: Mumbai, India
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Hi,
I do not know what is UNIT=PERMDA, can you please tell me for what this parameter is?
I know about one parameter known as Management class, which is responsible for deletion or 'storage' of some DSN.
For an SMS-managed data set (one with a storage class assigned), the system handles the migration and backup of the data set based on the attributes defined in the management class for the data set.
In many cases, the attributes defined in the management class selected by an installation-written automatic class selection (ACS) routine are sufficient for the data sets you create with DD statements. However, you can specify the name of a management class on the MGMTCLAS parameter for a new SMS-managed data set. (Note that an ACS routine can override the management class that you specify.)
The storage administrator at your installation defines the names of management classes and their attributes. To view a list of management class names and their attributes, use the Interactive Storage Management Facility (ISMF).
Examples
| Code: |
//DD8 DD DSNAME=DESIGND.PGM,DISP=(NEW,KEEP)
//DD9 DD DSNAME=DESIGNE.PGM,MGMTCLAS=MCLASA,DISP=(NEW,KEEP) |
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Anuj Dhawan
Superior Member
Joined: 22 Apr 2006
Posts: 6248
Location: Mumbai, India
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| saptagiri kintali wrote: |
| check by giving disp=(new,keep,keep) .i think this will work. |
Sure ?
Please serach for DISP parameter in some JCL manual or in the forum, I hope, you would like to suggest a new solution on next visit of this topic. |
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murmohk1
Senior Member
Joined: 29 Jun 2006
Posts: 1436
Location: Bangalore,India
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Prabhu,
| Quote: |
| In many cases, the attributes defined in the management class selected by an installation-written automatic class selection (ACS) routine are sufficient for the data sets you create with DD statements. However, you can specify the name of a management class on the MGMTCLAS parameter for a new SMS-managed data set. (Note that an ACS routine can override the management class that you specify.) |
I support Anuj. Before you apply the parameter what Anuj had suggested, speak with your local STORAGE team. There should some reason for assiging the present management class to your dataset. |
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expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8796
Location: Welsh Wales
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| Quote: |
| However, you can specify the name of a management class on the MGMTCLAS parameter for a new SMS-managed data set. (Note that an ACS routine can override the management class that you specify.) |
Too right the ACS routines can override the user specification of MGMTCLAS. Always the case in a shop where I've set up SMS.
Us storage guys ALWAYS know best - That's why we are the storage guys  |
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hemanth.nandas
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Joined: 18 Aug 2007
Posts: 120
Location: India
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Hi all,
I would like to mention you all that, Once If you mention DSN as temporary and DISP=(NEW,CATLG,DELETE), The system itself will correct the DISP parameter as PASS and thats the propety of temporary dataset, I mean logical dataset not a physical one. Hence You cannot store it or catlg it any more after job complete. Its a system controlled dataset.
Instead of temporary dataset, make it as physical I mean don't use '&' while Giving DSN. You can catlg or keep or delete it depends on requirement. |
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Anuj Dhawan
Superior Member
Joined: 22 Apr 2006
Posts: 6248
Location: Mumbai, India
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Hi Hemantha,
I got some queris to ask from your reply,
1.
| Quote: |
| Once If you mention DSN as temporary and DISP=(NEW,CATLG,DELETE), The system itself will correct the DISP parameter as PASS and thats the propety of temporary dataset |
Intresting concept, from where did you get this information, please direct me to some link. My question is, how the system distinguish between the DDs to understand that 'which DD' is meant for Temporary DSN & which is not? Please provide me some example for better understanding ?
2.
| Quote: |
| Hence You cannot store it or catlg it any more after job complete |
I never tried to 'store' a DSN in CATALoGue, (actually, I know to make an 'entry' of DSN in CATALoGue & can can just direct the system to do so) Please let me know that how do you do that?
3.
| Quote: |
| Instead of temporary dataset, make it as physical I mean don't use '&' while Giving DSN |
What's the definition of temporary & physical here ? I'm confused..  |
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martin9
Active User
Joined: 01 Mar 2006
Posts: 290
Location: Basel, Switzerland
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Hi together,
the file is always stored with this DISP...
but instead of giving a full qualified dataset name on the dd-statement,
it gets a system generated dataset name.
therefore give a full qualified dataset name, and
if you do not have any cleanup process for "old" files,
it will keep on disk. otherwise store it on a tape.
regards,
Martin9 |
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hemanth.nandas
Active User
Joined: 18 Aug 2007
Posts: 120
Location: India
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Hi Anju,
Sorry for late reply, I had some work so i couldn'y able reply.
| Quote: |
| Intresting concept, from where did you get this information, please direct me to some link. My question is, how the system distinguish between the DDs to understand that 'which DD' is meant for Temporary DSN & which is not? Please provide me some example for better understanding ? |
I am afraid of with your question, Since My mind was asking question to you DON'T YOU KNOW HOW TO CODE TEMPORARY DATASET?
Its Ok, If you code '&&' in DSNAME, then system generates n treat as temporary dataset.
Just try in your system, I mean try with some job like this,
| Code: |
| // DD DSN=&&TEMP,DISP=(NEW,CATLG,DELETE) |
Then look in job spool, Paste the message here, Then I will Tell you the link ;-)
| Quote: |
| I never tried to 'store' a DSN in CATALoGue, (actually, I know to make an 'entry' of DSN in CATALoGue & can can just direct the system to do so) Please let me know that how do you do that? |
Please look into my statement, I had said that becuase of If you are going to create a dataset means what? As I know, storing it somewhere(?)(I mean store it in tape drive or in disk(DASD)) and then make the entry in catlg for that somewhere(?). So that system will search for it.
If you don't want to make entry in catlg, how you will code in JCL?, I.e. KEEP(as per JCL)(means don't make entry in catlg but store it!!) Since without storing it somewhere how system will look for Dataset, becuase dataset itself a File(?).
| Quote: |
| What's the definition of temporary & physical here ? I'm confused.. |
I suggest you to read JCL concept on Temporary Dataset......  |
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murmohk1
Senior Member
Joined: 29 Jun 2006
Posts: 1436
Location: Bangalore,India
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Hemanth,
| Quote: |
If you don't want to make entry in catlg, how you will code in JCL?, I.e. KEEP(as per JCL)(means don't make entry in catlg but store it!!)
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Where did you get this? I thought UNCATLG is used for not making entry into catlog (uncatlog). |
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ofer71
Global Moderator
Joined: 27 Dec 2005
Posts: 2358
Location: Israel
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KEEP is the same as CATLG for new SMS-managed datasets.
O. |
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martin9
Active User
Joined: 01 Mar 2006
Posts: 290
Location: Basel, Switzerland
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Hy Kumar,
each file (i.e. dataset) will be stored on disk (dasd),
no matter if temporary or permanent.
if you choose temporary, then the system generates an ugly
long dataset name by itself.
therefore of this name, you can actually nomore access the file.
temporary datasets are useful if you need the file in that specific
job stream only. you can PASS it with the DISP from one step to
another within your job.
but just think, it might be useful in case of any error, to look
into the file for its contents, therefore give a full qualified dataset
name... :-)
regards,
martin9 |
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hemanth.nandas
Active User
Joined: 18 Aug 2007
Posts: 120
Location: India
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Hi All,
| Quote: |
| Where did you get this? I thought UNCATLG is used for not making entry into catlog (uncatlog). |
UNCATLG is used to uncatalog an created dataset not for new dataset, and ofcourse you can use it but system will treat it as KEEP only.
If in your case, What does KEEP mean?
| Quote: |
KEEP is the same as CATLG for new SMS-managed datasets.
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I don't know about NEW SMS-managed datasets, Could you please direct me some link to learn NEW SMS-managed dataset?
| Quote: |
each file (i.e. dataset) will be stored on disk (dasd),
no matter if temporary or permanent. |
Then how could you store dataset in Tape drive? Can't we store it on tape drive?
| Quote: |
if you choose temporary, then the system generates an ugly
long dataset name by itself. |
Martin, Thanks for giving excellent answer in this regard.. Keep a top.. 
| Quote: |
but just think, it might be useful in case of any error, to look
into the file for its contents, therefore give a full qualified dataset
name... :-) |
Will it work for temporary dataset? Please justify it.. I am not aware of it if it so.......
I request you all that to read entire post from beginning and post your reply accordingly..
Thanks & Regards |
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enrico-sorichetti
Superior Member
Joined: 14 Mar 2007
Posts: 10886
Location: italy
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martin9
Active User
Joined: 01 Mar 2006
Posts: 290
Location: Basel, Switzerland
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hy enrico,
there are always to many follow ups...
it is not necessary to know the solution,
it is just necessary to know, which book to
read. autodidactics are not given to everybody... :-)
anyway you will find everything veryx easily in the internet,
you know, i know, just let the forum also know...
saluti a tutti...
martin9 |
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