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ADASTRIP

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  1. ADASTRIP Presented by Treehouse Software

  2. ADASTRIP A Utility for Extracting Large Volumes of Data from ADABAS Quickly

  3. The Problem! ? How to extract large volumes of data as efficiently as possible from our ADABAS transaction database(s) in order to populate the new Data Warehouse

  4. Special Requirements • Must have minimal or no impact on on-line database users • We already have batch window processing constraints • CPU efficient • Solution should be easy to implement and cost effective • Time limited, no programming resources

  5. What are our options? • Batch NATURAL program to extract the data and perform some extra processing • Unload, decompress, and process file using NATURAL or COBOL, etc. • COBOL direct call program • Any other options, maybe a utility

  6. Batch NATURAL Program • Too slow for millions of records being processed sequentially • Impacts on-line systems (our system is 24 hours a day, 7 days a week) • We have limitations on batch window • Can improve performance with PREFETCH or MULTI - FETCH

  7. Using ADABAS Utilities • Can be faster than Batch program reading database through MPM • Reading flat file from NATURAL or COBOL is easy to implement • Decompression may take lots of resources • May not want entire file(s) • Large work files may be needed • DBA needs to be involved in utility runs

  8. Direct Calls • May be slightly faster than NATURAL • COBOL and NATURAL batch are comparable in terms of performance • Batch window constraint, still too slow • COBOL direct calls, limited programming resources • What about the impact on the MPM?

  9. What if... • We had a utility that: • would extract the data simply, quickly, and efficiently • was parameterized • was easy to install and use • was very CPU efficient and fast to execute • didn’t impact on-line performance • produced multiple flat files for further processing with one pass of the database

  10. Introducing ADASTRIP A utility for extracting data quickly and efficiently from ADABAS databases, either direct or from the backup tapes.

  11. ADASTRIP Features • Fast, efficient extraction of multiple data files from one or more ADABAS files • One pass through backup tapes or database to extract data needed • Flat files can be input to pre-processing programs or loaded directly to the database • User-exits available for extra processing

  12. Solution • Implement ADASTRIP to extract data from the ADASAV backup tapes • All data can be extracted in one run • No impact on on-line databases • Most recent data can be merged from the latest QDUMP or PLOG • Extra processing of data can be done after extraction prior to load of database

  13. Example Production Run • Production job to populate a Relational MIS database • 100 extract files • Records extracted (as few as 75 records and as many as 5 million per file) total of approximately 15 million records extracted • Elapsed time approximately 60 minutes • CPU consumed approximately 51 seconds

  14. ADASTRIP Operations USER EXIT EXTRACT FILE 1 BACKUP EXTRACT FILE 2 ADASTRIP PARMS EXTRACT FILE N PLOG/QDUMP MORE...

  15. Uses for ADASTRIP • Extraction of the file structure (FDT) only • Normalization of PE/MUs is possible • Recovery of historical data from past backups • Creation of test data • Deferred processing of critical reports

  16. Applications of ADASTRIP • Recovery of historical data • Recovery of “lost” NATURAL programs • Export to other systems or DBMSs • Import data between ADABAS databases • Fast processing avoids ADABAS I/O • Deferred processing • Replace ADAULD

  17. Benefits of ADASTRIP • Moving sequential processing away from ADABAS reduces load • Faster processing, avoids ADABAS I/O • Deferred processing, reports can be run from data extracted from a backup • Processing on synchronized data (a backup has the data fixed at a point in time)

  18. Recovery of a NATURAL Program • ADASTRIP parameters needed: • NATSYS FILE 8 • NATSYS FIELDS LJ LK • NATSYS TEST A LJ(8).EQ.C’LOSTLIB’ • NATSYS TEST B LJ+8(8).EQ.C’PROG’ • NATSYS TEST C LJ+8(8).EQ.C’PROG2’ • NATSYS RULE A+B • NATSYS RULE A+C

  19. ADASTRIP V3Changes/Enhancements • Available in MS DOS files on a 3.5” diskette or an e-mail attachment to facilitate fast transmission of new releases, upgrades, and zaps • Support for ADABAS V7.x, and backwards compatibility with ADABAS V6.x, and V5.x • New security exit, can be called prior to accessing data • Changes to index processing • Multi-tasking read allows true parallel processing of backup tapes

  20. ADASTRIP V3Changes/Enhancements • Reductions in memory usage because of shared internal buffer pool • Increases in various limits • Enhanced selection criteria • Support for 191 PE occurrence's, 16k fields and null fields • JOINFILE utility allows files to be joined record for record on a common key • Enhanced user exit examples (e.g., data conversion to other formats) • Support for COBOL user exits

  21. Futures • Security exit to implement RACF/ACF rules • On-line generation of JCL and parameters • Further enhanced user exits • Increases in internal limits • New user exits

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