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Dynamic VSAM access

 
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harshal

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Joined: 29 Dec 2005
Posts: 21

PostPosted: Wed Sep 07, 2011 9:18 am    Post subject: Dynamic VSAM access
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Hi,

I have a query related to a Websphere application accessing VSAM files and batch jobs accessing the same VSAM files. I have a websphere application which runs some PL1 program in background when transaction is fired from the frontend. These programs allocate VSAM files and access them dynamically. At the same time, there are few batch jobs which in turn calls the same program as the websphere application and tries to allocate the same VSAM files dynamically and access it.

Now, the websphere application accesses the VSAM file in update mode whereas the batch jobs accesses them in read mode only. There is some contention caused in these two applications which causes the websphere application go down.

My question is,

Would this problem be because of dynamic access of same VSAM file by two different applications at the same time? If so, how that can be rectified. I can't change the JCL or program as they are very generic and used for many other applications.

Please suggest.
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dbzTHEdinosauer

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Joined: 20 Oct 2006
Posts: 6967
Location: porcelain throne

PostPosted: Wed Sep 07, 2011 12:12 pm    Post subject:
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what are you willing to change? how the operating system functions?

plus you don't even know why your websphere application has a problem.
suggest find the answer to this:
Quote:
There is some contention caused in these two applications which causes the websphere application go down

then come back with your request for magical solutions.
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Pete Wilson

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Joined: 31 Dec 2009
Posts: 440
Location: London

PostPosted: Wed Sep 07, 2011 7:20 pm    Post subject:
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Look up SHAREOPTIONS and ENQ/DEQ
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