Home

Support:

ADLIB and TLIB Housekeeping

Does Access Gen (TSO) itself keep the ADLIB and the TLIB 'clean', when action blocks or models are deleted from the Host Encyclopedia or is there a special cleaning utility?

Access Gen (TSO) automatically removes action diagrams from the cache which are no longer in the encyclopedia, so the ADLIB does not contain redundant information. This is the first task that the batch utility performs before extracting any data. The TLIB library (which contains the model structure information) is not cleaned by the batch utility. However, this is initialised with each new version of Access Gen (TSO) and the data changes between releases and it is at this point and redundant members are deleted.

In CE-Edit/Access Version 5, as a first step towards improving the housekeeping and cache processing, we have introduced packing on the members of the ADLIB library. This means that after extraction from the encyclopaedia, they are packed as they are stored. If the ADLIB is currently defined as VB, the saving will be 20%. If the ADLIB is defined as FB, the saving will be 60%. Overall the best option is FB packed, although the difference between this and VB packed is only 3%.

To pack the existing members in the ADLIB, you would need to copy the members from one dataset to another using ISPF 3.3 specifying pack. There is no immediate need to do this - the packed and non-pack members can co-exist without any problems.