---snip---- 1. To place your library(s) in the LINKLIST, they must be cataloged in the Master Catalog.
-----snip------ Datasets that are not in the master catalog CAN be in the linklist. We have several. You just have to add the volser to the PROG01 coding - LNKLST ADD NAME(LNKLST00) DSN(OEM1.CACT.V11.CAILIB) VOLUME(MVS010) This dataset is in a user catalog. Linda Mooney ----- Original Message ----- From: "Rick Fochtman" <[email protected]> To: [email protected] Sent: Wednesday, June 10, 2009 5:42:51 PM GMT -08:00 US/Canada Pacific Subject: Re: dynamic allocation ------------------------------------<snip>--------------------------- >(IBM-MAIN, this is a thread that started on IMS-L, but I thought I might get >some useful discussion from IBM-MAIN as well.) > >This is puzzling to me. Are you advocating having JOBLIB/STEPLIBs that >specify every single library that your particular jobs needs to access? This >seems to me to be (no offense) nuts! I am of the total opposite inclination. >I would much prefer to have a "system search chain", as it were, that contains >all of the libraries that have load modules that need to be executed. As a >developer I, in fact, would prefer to have our application loadlib's also in >LINKLIST. The only reason I gave up on asking for that is because of the >whole "need to refresh the LLA" thing. VSE is so much simpler in this regard. > There is a "permanent search chain" that has all of the standard "load >libraries" in it. Things such as TCP/IP, DB2, DL/I, etc., as well as our >production application library. Then in your job's JCL if you wanted, say, to >execute the test version of a program which needs to call the production >version of a subroutine you need only specify an "override" library. This l! ibrary will be searched first, and if a module is not found then it will search the system search chain. > >To me LINKLIST is similar to this. But I've been told that we can't use it >for application libraries because then the LLA would need to be refreshed each >time we made a change to something in our application load library. > >Frustrating... > > -------------------------------------<unsnip>------------------------------------------ Frank, I understand your frustration, but there are some limitations that need to be kept in mind. 1. To place your library(s) in the LINKLIST, they must be cataloged in the Master Catalog. But unless the name starts with a SYS1. qualifier, it can't appear in multiple catalogs. This could be a real problem in a multiple-image environment. Do you want to maintain multiple copies of each dataset? I seriously doubt it. Maintenance headache. Much better to have it in a USERCAT, which can itself be shared across multiple images, but this precludes LINKLIST presence. (Master Catalog integrity is absolutely CRUCIAL to system availability. You can't even IPL with a corrupted MCAT, in most cases. That's why system guys get really nervous about any access other than READ to the MCAT.) 2. There's no reason that some system libraries can't be in LINKLIST. Language Environment and TCP/IP come to mind. Depending on the names, perhaps your compiler(s) as well. 3. Even in a single-image environment, it can create a hassle when your systems guys start testing a new level of the Operating System, if they've had to create a new Master Catalog. Not to mention maintenance and upgrades to OEM products. Consider this: even if you can't get all the libraries you want into LINKLIST, and thus into LLA, you can probably get them under the VLF "umbrella", improving performance. Check with your systems guys about this possibility. For the foreseeable future, JOBLIB/STEPLIB are going to be a fact of life. No getting around it. -- Rick -- Remember that if you’re not the lead dog, the view never changes. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
