Negative Dependency

sprikitik · Posted: Wed May 23, 2012 8:49 pm

Hi,

I have 2 jobs job1 and job2. There's a negative dependency between the two jobs. My question is what if job1 abended? will Job2 run?

Thanks!

dick scherrer · Posted: Wed May 23, 2012 8:55 pm

Hello,

What does "negative dependency" mean to you? It is not a term with which i'm familiar.

dbzTHEdinosauer · Posted: Wed May 23, 2012 8:58 pm

my dad used to tell me that our relationship was that of a negative dependency

Pandora-Box · Posted: Wed May 23, 2012 9:15 pm

Are you trying to say negative dependency mean job2 will execute when job1 ends with anything else apart from acceptable return codes

sprikitik · Posted: Wed May 23, 2012 9:38 pm

Pandora-Box · Posted: Wed May 23, 2012 9:41 pm

Sprik,

You never answered my question or to others

Please explain negative dependency

dick scherrer · Posted: Wed May 23, 2012 9:43 pm

Hello,

And also mention which scheduling software is being used.

Pandora-Box · Posted: Wed May 23, 2012 11:42 pm

or Did you mean Job1 and Job2 wont execute together by calling it as negative Dependency

Nic Clouston · Posted: Wed May 23, 2012 11:49 pm

what is the relationship between the two jobs? If 'none' (negative) then WHAT are you prattling on about?

kratos86 · Posted: Thu May 24, 2012 3:53 pm

vasanthz · Posted: Thu May 24, 2012 4:32 pm

Kratos,
Is 'mutually exclusive' jobs called as negative dependency in some shops? Just wanted to know

Robert Sample · Posted: Thu May 24, 2012 4:48 pm

I think either your site has its own terms, or you are making up the term "negative dependency". From the CA-7 Primer manual, Glossary:

David Robinson · Active User Joined: 21 Dec 2011 Posts: 199 Location: UK

"Negative dependency" is a CA7 term (or was, I haven't worked with it for a few years) that is a mechanism to prevent two jobs running together. There is no dependency between them in the sense that either one must run first. They simply cannot run together.

As to the TS's question, I cannot remember what happens in that case if one job abends. In TWS there is a similar concept called "special resources" and you have the option of specifying whether the resource is freed or not in the event of an abend. So for example, if the resource was a tape drive there would be no reason why a second job couldn't start to use it after one failed. But if it was a database that may have been corrupted, you would most likely want to recover it first.

Pandora-Box · Posted: Thu May 24, 2012 5:08 pm

I would try to understand what happens in the Jobs and proceed further

Rohit Umarjikar · Posted: Thu May 24, 2012 6:47 pm

In my shop we also use negative dependecy, its like if job1 is running then job2 will wait to complete it and vice versa. This is to avoid any contentions.

Anuj Dhawan · Posted: Thu May 24, 2012 7:23 pm

AFAIK, Negative Dependency refers to mutually exclusivity between two or more Jobs. This is checked when a job is in the READY Queue and not submitted if a negative dependency job is running.

If you're a CA7 developer, you can define a negative dependency by prefixing the predecessor Job name with a /. It is recommended that a negative dependency definition be applied to both (or all) jobs in the set to ensure that this applies regardless of which job enters the Queue/s first.

Pandora-Box · Posted: Sat May 26, 2012 6:21 pm

Sprik,

You never answered my question or to others

Please explain negative dependency

vasanthz · Posted: Sat May 26, 2012 8:43 pm

Pandora-Box · Posted: Sat May 26, 2012 9:11 pm

I got that Vasanthz wonder why my post repeated

Nic Clouston · Posted: Sat May 26, 2012 9:21 pm

Doesn't matter if the post was repeated - it is still relevant as the topic starter (TS) has not confirmend if they are using CA7 or not so we do NOT know if the definition posted is the required one or not.

vasanthz · Posted: Sat May 26, 2012 9:43 pm

Apologies if that sounded in a different tone.
I was just trying to support the TS.

Pandora-Box · Posted: Sat May 26, 2012 9:56 pm