As part of best practice & optimization, my site support has asked me to place files that are larger than 1000 CYLs in SILO. When I asked them how to use it. He informed me to use UNIT=SILO. I am not sure on what specific condition it has to be used.
I searched manuals and also in google to get information on SILO in mainframe. Couldn't get much info. I have seen in production environment that UNIT=SILO is used to take backup of files.
My query is , whether it has any performance improvement when compared to TAPE. I couldnot visualize how it is better than other TAPE or others. Please clarify this when you have time.
UNIT=SILO
Moderators: Frank Yaeger, DikDude, Moderator Group
Check with your storage people - they know how SILO is set up in your shop and for what it is to be used. But one would assume that whoever said "do this" has already checked it out so all you have to do is implement it. Which means clarifying with that group when to use that unit "type".
Regards
Nic
Nic
There should be some standard that explains how to use this UNIT= value.
Most places the SILOs are automated tape libraries to be used for large files that do not need to be online (i.e. vsam, database, libraries, etc).
You will need to find out if SILO is for dasd or something else.
As Nic mentioned, you need to work with your storage management people.
If the storage magement people (who "knows these things") provided the direction, suggest you try to run an IEFBR14 to allocate a dataset with UNIt=SILO.
Most places the SILOs are automated tape libraries to be used for large files that do not need to be online (i.e. vsam, database, libraries, etc).
You will need to find out if SILO is for dasd or something else.
As Nic mentioned, you need to work with your storage management people.
If the storage magement people (who "knows these things") provided the direction, suggest you try to run an IEFBR14 to allocate a dataset with UNIt=SILO.
Last edited by DikDude on Tue May 07, 2013 11:08 pm, edited 1 time in total.
Have a good one
Site support is saying that it has been used for storage reduction.
I tried allocating a dataset using IEFBR14 with UNIT=SILO. Job went fine. I could not find the datase in =3.4 options. Its saying that no dataset names are found.
But, dataset with same name and with UNIT=SYSDA is cataloged using IEFBR14. Its strange for me. Could you please clarify if anything I am failing to understand wrt the way SMS works.
I tried allocating a dataset using IEFBR14 with UNIT=SILO. Job went fine. I could not find the datase in =3.4 options. Its saying that no dataset names are found.
But, dataset with same name and with UNIT=SYSDA is cataloged using IEFBR14. Its strange for me. Could you please clarify if anything I am failing to understand wrt the way SMS works.
Last edited by diwz on Fri Apr 26, 2013 11:20 am, edited 1 time in total.
Below is the JCL that used
Code: Select all
//STEP01 EXEC PGM=IEFBR14
//SYSPRINT DD SYSOUT=*
//SYSUDUMP DD SYSOUT=*
//ABNLTERM DD SYSOUT=*
//NEWDD DD DSN=Z332107.UNIT.SILO.TEST4,
// DISP=(NEW,CATLG),
// UNIT=SILO,
// DCB=(LRECL=80,RECFM=F,BLKSIZE=0,DSORG=PS),
// SPACE=(CYL,(1,1),RLSE),
// LABEL=(1,SL,,,EXPDT=99000)
//*
FREE TUTORIALS
Tutorials
Free tutorials from mainframegurukul
- JCL Tutorial
Covers all important JCL concepts. - Cobol Tutorial
This tutorials covers all Cobol Topics from STRING to COMP-3. - DB2 Tutorial
DB2 Tutorial focuses on DB2 COBOL Programming. - SORT Tutorial
This Tutorial covers all important aspects of DFSORT with examples - CICS Tutorial
This CICS tutorial covers CICS concepts and CICS Basics, CICS COBOL Programming.
Interview
Mainframe Interview questions
- Cobol Interview Questions
50+ Interview Questions - JCL Interview Questions
50+ Interview Questions - DB2 Interview Questions
100+ Interview Questions - CICS Interview Questions
70+ Interview Questions - VSAM Interview Questions
27 Interview Questions
Other References
Mainframe Tools and others
- XPEDITER Reference
Explains how we can debug a program - FILEAID Reference
Explains how to browse , edit and delete datasets - Change Man Reference
Quick Start tutorial on Changeman - Abend Reference
Important Abend codes explained - FaceBook Page
MainframeGurukul FaceBook Page - LinkedIn Page
MainframeGurkul Linkedin Page