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Status Not under consideration
Workspace CICS Transaction Server for z/OS
Categories Runtime
Created by Guest
Created on Jul 5, 2012

RELATED IDEAS

Shared TS offload capability

Currently Cics allows for shared temp storage in the coupling facility. This is good,
but if the CF Structure is not large enough a full condition is reached and the structure
must be re-sized. This involved offloading the data, resizing it, then reloading it. To
perform this the cics region must be down. We can not afford to do that since we run a
7x24x365 operation.
It would be nice if the structure had an OFFLOAD feature where if the TEMPSTOR in the CF
becomes full or reaches a predetermined threshold, offloading will occurr - making room for
more data. Even though this will slowdown the region, it will be much better than loosing
the region. The User (US) will then schedule an outtage window when the structure can be
re-sized at the our convenience.

Idea priority Medium
  • Guest
    Reply
    |     Oct 5, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Transaction Processing
    Product - CICS Transaction Server

    For recording keeping, the previous attributes were:
    Brand - WebSphere
    Product family - Transaction Processing
    Product - CICS Transaction Server

  • Guest
    Reply
    |     Oct 29, 2014

    Automatic alter for the Shared |TS server is supported, but it can actually be harmful, and we therefore do not promote its use very strongly.

    For example if automatic alter for size is enabled, this has the nasty side-effect of allowing the coupling facility to make the structure SMALLER if it needs more space for other structures and the current structure is not being fully used. This has in the past allowed another structure to steal space from a pool at off-peak times, causing it to run out of space later. There are ways to get round this, for example by manually increasing the minimum size and refreshing the policy if an automatic increase in size has occurred, to prevent it being reversed later by the system during a quiet period, but they are not very convenient.

    Instead, we would recommend monitoring the server warning messages (which can be set to be issued at a different threshold if required) and taking operator action to adjust the size if necessary. This could presumably be implemented using automated operations procedures if the customer wishes to handle size increases automatically, with the advantage that the size is then completely under installation control.

  • Guest
    Reply
    |     Nov 2, 2012

    We have a problem too if we have to increase the maxqueue parameter: we need to pass the following command: SETXCF FORCE,STRUCTURE,STRNAME(DFHXQLS_xxxx) when the cics are down

  • Guest
    Reply
    |     Jul 6, 2012

    This is a candidate for a future release

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