What type of file is this?



Help for IBM's record-oriented filesystem VSAM, ESDS, KSDS, RRDS, LDS and Storage management Subsystems

What type of file is this?

Postby Javierny » Thu Mar 03, 2011 11:47 pm

Please forgive my naivety but this is the first time I am seeing a file with this kind of properties.
File Type.JPG


If you notice it has record count on the control area. If the row is repeated the record count as well as line number increases. I am sorry but I just want to understand what kind of file is this? It does not allow to be modification. The file maintains its property when copied to another using =3.3 but loses it when copied via a tool like file master or file aid.

Pardon my ignorance please and thank you for your help.
You do not have the required permissions to view the files attached to this post.
Javierny
 
Posts: 4
Joined: Thu Mar 03, 2011 11:38 pm
Has thanked: 0 time
Been thanked: 0 time

Re: What type of file is this?

 

Re: What type of file is this?

Postby MrSpock » Fri Mar 04, 2011 12:36 am

Why would you create a dataset with an LRECL of 8?
User avatar
MrSpock
Global moderator
 
Posts: 810
Joined: Wed Jun 06, 2007 9:37 pm
Location: Raleigh NC USA
Has thanked: 0 time
Been thanked: 2 times

Re: What type of file is this?

Postby Robert Sample » Fri Mar 04, 2011 12:53 am

Your best bet would be to talk to your site support group about the file. It is possible that there is security (e.g., RACF) on the original file to prevent updates that is not copied to a new file. There are other possiblities, however, so talking to your site support group is your fastest way to figure out what's going on.
Robert Sample
Global moderator
 
Posts: 3367
Joined: Sat Dec 19, 2009 8:32 pm
Location: Dubuque, Iowa, USA
Has thanked: 1 time
Been thanked: 222 times

Re: What type of file is this?

Postby Javierny » Fri Mar 04, 2011 3:23 am

Thank you for your help Bob. The problem was discovered with profile option of a file. When I opened the file it had "NUM ON STD" thats why it incremented number along with incrementing the record. Once profile was changed to 'NUM OFF' we were able to modify the file. However if we saved an came back to the file the record number was same as the record we had modified it to. In general ISPF profiles do not have NUM ON STD but in this case it did.
Javierny
 
Posts: 4
Joined: Thu Mar 03, 2011 11:38 pm
Has thanked: 0 time
Been thanked: 0 time

Re: What type of file is this?

Postby dick scherrer » Fri Mar 04, 2011 3:46 am

Hello,

Thank you for your help Bob.

Ah, Umm, Err - - That would be Robert. . . ;)

d
User avatar
dick scherrer
Global moderator
 
Posts: 6304
Joined: Sat Jun 09, 2007 8:58 am
Has thanked: 3 times
Been thanked: 91 times

Re: What type of file is this?

Postby stevexff » Fri Mar 04, 2011 2:27 pm

Why would you create a dataset with an LRECL of 8?


Well, any number of reasons really. Last week I created one with LRECL=4, on purpose. But setting the RECFM=F with BLKSIZE of 8 as described above will pretty much guarantee appalling performance...
Steve
stevexff
 
Posts: 56
Joined: Wed Nov 10, 2010 7:48 pm
Has thanked: 0 time
Been thanked: 0 time

Re: What type of file is this?

Postby Javierny » Sat Mar 05, 2011 1:04 am

stevexff wrote:
Why would you create a dataset with an LRECL of 8?


Well, any number of reasons really. Last week I created one with LRECL=4, on purpose. But setting the RECFM=F with BLKSIZE of 8 as described above will pretty much guarantee appalling performance...


Wish there was a "like" button/link here... :)
Javierny
 
Posts: 4
Joined: Thu Mar 03, 2011 11:38 pm
Has thanked: 0 time
Been thanked: 0 time


Return to VSAM/SMS

 


  • Related topics
    Replies
    Views
    Last post