- Reduces DASD Space Requirements by 30 to 70%
- Improves Online and Batch Performance by 50 to 80%
- Cuts CPU Utilization...of Major Applications
CICS and Batch applications make heavy use of keyed
indexed VSAM (KSDS) files. VSAM is a prime bottleneck to the performance
of these systems.
IAM, eliminates VSAM's (KSDS and ESDS) bottleneck by slashing I/O and CPU time.
IAM's Real Time Tuning monitors I/O activity, dynamically changing the number
of buffers and I/O chaining. IAM completely eliminates the I/O to the VSAM
IAM executes fewer instructions per record request. Batch processing times
are dramatically reduced by 50 to 80%.
IAM does not require users to make any modifications to their operating system.
IAM does not replace any operating system access methods. IAM is designed to
coexist with VSAM.
IAM with data compression takes less CPU time than VSAM and significantly less
than software compression products.
IAM's file structure and software compression technique is significantly faster
than VSAM's hardware compression, while giving comparable or better space reduction.
IAM delivers superior performance and better space savings while using less
IAM Compared to VSAM using hardware compression, on an 11GB file sequentially
reading all the records.
Many of the popular application vendors make extensive use of VSAM KSDS files.
Many of these files are excellent candidates for conversion from VSAM to IAM.
Convert your VSAM files whether they are 1GB, 4GB or 20GB, to IAM and see your
VSAM problems disappear...
- IAM reduced RMDS space requirements from 106,000 tracks
to less than 53,000 tracks.
- We converted our VSAM files to IAM without change. Now
the file is over 20GB.
- Replaced existing VSAM compression package with IAM and
saw a 50% savings in CPU time.
- IAM/AIX uses 20% to 70% less CPU time than VSAM.
- IAM/AIX performs 50% to 80% less EXCP's than VSAM.
- IAM/AIX runs in 50% to 80% less Elapsed Time than VSAM.
Alternate Index Support
allows you to convert VSAM Files with alternate indexes to
IAM files. With the IAM alternate index support, the IAM
benefits of significant performance improvements and DASD
space savings are available to more of your VSAM data sets.
As with standard IAM support there are no changes required
to application programs!
IAM took 8 min. versus 39 min. for VSAM tuned with
256,000 Random Read; 160,000 Updates, 1/2 of which required an update to the
other alternate index; 80,000 Inserts; 16,000 Deletes; 16,001 Points (start
browses) with 80,000 sequential reads (5 records read per start browse).
IAM took 7 min. versus 15 min. for VSAM tuned with LSR
This test read the file sequentially using the NONUNIQUE key alternate index.
FREE 90-Day No-Obligation Trial call 973-890-7300, e-mail firstname.lastname@example.org
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