Question & Answer
Question
An optimization of Sterling Connect:Direct for z/OS transfers has been done using the following values: COMPRESS EXT=(CMP=1 WIN=14 MEM=1) The files that are transferred can vary in size from small KB to 150GB. The transfers are done on a z/OS system with the destination being z/OS or Unix. As there now a 10GB line, are these parameters still the best ones to perform these transfers?
Answer
The previously used Extended Compression values have been chosen to perform the best compression of the data as possible, which is usually the case when line bandwidth is limited. However CMP=1 and
MEM=1 means that Sterling Connect:Direct for z/OS will use a lot more CPU and memory to perform this
compression:
COMPRESS EXT=(CMP=1 WIN=14 MEM=1)
As you now have a 10GB line and based on the sizes of files mentioned, it is recommended that you revert to using the default level of compression. This is because the difference in transfer time between a file compressed with the current settings and a file compressed with default settings would be negligible, but the savings in CPU and Memory consumption would be quite significant.
COMPRESS EXT This would use the default settings.
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Document Information
Modified date:
17 December 2019
UID
swg21976904