Changing online log data set characteristics
Because you can restart IMS (warm
start or emergency restart) with all input on SLDS, you can reallocate
the OLDSs between a shutdown (or failure) and a subsequent restart.
To restart IMS using SLDSs as
input, you must delete the PRIOLDS and SECOLDS records from the RECON
data sets.
Changing block size for the OLDS Changing the OLDS mode from single to dual You must change your OLDSDEF specification in the LOGGER section of the DFSDFxxx member in IMS.PROCLIB to change the OLDS mode from single to dual. IMS initialization requires that at least three pairs of OLDSs be available for a dual logging environment. You must also reconsider data set placement. Changing the OLDS mode from dual to single You must change your OLDSDEF specification in the LOGGER section of the DFSDFxxx member in IMS.PROCLIB to change the OLDS mode from dual to single. IMS initialization requires that at least three OLDSs be available for a single logging environment. You must also reconsider data set placement. Changing the number of OLDS buffers You must change BUFNO by changing the OLDSDEF specification for BUFNO in the LOGGER section of the DFSDFxxx member in IMS.PROCLIB to change the number of OLDS buffers. Changing space, location, or allocation of an OLDS without shutting down IMS