I would assume from your question that you are trying to improve the performance of your VSAM batch applications. If you are then you should compare the following products as well. Peformance Solution - EMC Veloci-Raptor - Dino Software
All of the above products provide the same facilities as Mainview Batch Optimizer. You should also activate IBM's System Managed Buffering which is implemented via a Dataclass in ISMF. Suggest you define a Dataclass called SMB and set column 40 rec access bias to SYSTEM in ISMF. Then any VSAM files that are defined with a Dataclass of SMB will automatically invoke System Managed Buffering. However, all of the above products do not do dynamic bufferring. In other words if the application is accessing a VSAM file sequentially and hence using NSR buffering and the application changes the access to direct reads none of the above products detect that the access has changed and do not provide a larger number of index buffers and fewer data buffers. You should also consider IAM from Innovation. You will find that this product does in fact do true dynamic buffering. I have been benchmarking IAM vs VSAM for over 20 years and to date IAM has always outperformed VSAM in batch no matter whether you use System Managed Buffering, Batch LSR or products like Mainview Batch Optimizer. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
