VSAM for EVER, por Alvaro Salla
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O documento discute o papel do VSAM em aplicações bancárias e de cartões de crédito, e afirma que o VSAM não é usado em aplicativos do Tribunal de Contas da União. Também fornece conselhos sobre organização de dados, desempenho e funções do VSAM.
![VSAM Modern Roles (Once declared an unburied cadaver together with: Cobol, tape, batch processing, maiframe itself. Cui bono?) ,[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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VSAM for EVER, por Alvaro Salla
- 1. Proibida cópia ou divulgação sem permissão escrita do CMG Brasil. VSAM for Ever Our MVS mature audience for Ever: “Cambridge University geneticist Aubrey de Grey believes it will soon extend dramatically to 1,000 years our life spam. He thinks that the first person to live such might be 60 already “
- 4. Many commercial applications together with his good friend CICS (that sometimes cheats with DB2).
- 5. Atesto para os devidos fins que o VSAM (código honesto) não é usado pelos aplicativos do TCU para medir o custo do DNIT, CONAB, Ministério da Agricultura e assemelhados. Proibida cópia ou divulgação sem permissão escrita do CMG Brasil.
- 6. Choosing best organization for your data Quais os pro- cessos de recovery? Qual a melhor organização? Como garantir boa performance? E quais funções
- 10. Ignore IMBED, REPLICATE, KEYRANGE, ORDERED.
- 11. DFSMS Data Set Separationbycontroller
- 14. More than 255 extents for SMS-managed VSAM data sets:
- 15. Sequential: 16 per volume.
- 17. PDS: 16,
- 18. PDSE: 123.
- 19. Non-system-managed VSAM up to 255 per component and per stripe. If System-managed limit removed if DC has extent constraint removal.
- 21. MAXIMUMVOLUME COUNT, VOLUMES BE ADDED DYNAMICALLY TO A VSAM DATA SET WITHOUT MANUAL INTERVENTION AND WITHOUT TAKING DOWN THE APPLICATION.
- 23. REORG OR NOT REORG?
- 25. Option for CF cache structure for all data or write only
- 26. RLS CF cache structure support for system-managed duplexing and rebuild.
- 27. Data buffer pools may be allocated above the bar
- 28. VSAM RLS DIAG command to find latch contentions
- 30. SMF performance data of RLS usage of 64-bit data buffers
- 31. Command (TERMINATESERVER) for a faster SMSVSAM AS,
- 32. Health Checks for VSAM RLS: indicating latch contention and a single point of failure (SPOF) in the SHCDS.
- 35. SMB retry capability for Direct Option (DO) access bias.
- 36. SMB support for AIX® files.
- 37. Limit the SMB buffer size for DO at data Class SMS construct. It avoids to have up to 20% of all data in data buffers.
- 39. Data striping and multi-layering for all VSAM data sets.
- 40. VSAM data striping support for data sets with REUSE attribute.
- 41. Data Striping Proibida cópia ou divulgação sem permissão escrita do CMG Brasil.
- 43. Trap for data component and Trace enhancements.