I second the suggestion for IAM. It is a great product that will
significantly improve your performance over VSAM.
Joel Wolpert
Performance and Capacity Planning consultant
WEBSITE: www.perfconsultant.com
----- Original Message -----
From: "Robert Matthews" <robert.matthe...@bigpond.com>
Newsgroups: bit.listserv.ibm-main
To: <IBM-MAIN@bama.ua.edu>
Sent: Tuesday, September 29, 2009 2:21 AM
Subject: Re: Mainview Batch Optimizer
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.
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