Presentation of the Db2 continous delivery updates that will follow from db2 v12

1. © 2019 IBM Corporation
Db2 12 for z/OS Continuous Delivery
Update
Client Technical Professionals – peterhar@de.ibm.com
Db2 12 for z/OS – 05.03.19

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Agenda
§ What is behind continuous delivery?
§ Where is the current status?
§ What is new besides continuous delivery?

3. © 2019 IBM Corporation
What is behind continuous delivery?

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What is the motivation ?
New
functionality
Db2 for z/OS Market is demanding faster
reaction to requirements
V11 V12
3 years

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How Db2 for z/OS handles continuous delivery
§ Continuous delivery for Db2 starts after migration to V12
- Migration to V12 may still be in the future for you, but preparation for
this new concept is strongly recommended
§ New features come in with “function levels“ delivered in
the normal PTF service stream
§ Function levels are counted up consecutively
- Some day there may be a new version
§ To go to new function levels is voluntary
- Also skipping one or more function levels is possible, but consider:
• E.g. activation of level n+2 includes activation of level n as well as level n+1
- The same rule applies to catalog levels (catalog changes)
• Catalog changes are only one direction (no fallback)
§ http://ibm.biz/db2z12functionlevels

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Continuous Delivery – four levels are important
§ System level:
- Module or code level (ML)
SDSNLOAD, ...
- Catalog level (CL)
CATALOG & DIRECTORY structure
- Function level (FL)
Which new functionalities are enabled
§ Application level:
- Application compatibility level (AC)
APPLCOMPAT re-bind parameter
- Precompiler/Coprocessor
SQLLEVEL (replaces NEWFUN) in DSNHDECP

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Continuous Delivery – ideal technical picture
V12R1M100 V12R1M500 V12R1M501 VxxRyMzzz
SDSNLOAD / SDSNLINK
CATALOG & DIRECTORY
Apply PTFs and
restart DB2
V12R1M502
CATMAINT UPDATE
LEVEL
Function Level
-ACTIVATE cmd -ACTIVATE cmd ACTIVATE cmd
level
1.
2.
3.
Appl. Compat RE-BIND
APPLCOMPAT
4.

8. © 2019 IBM Corporation
Where is the current status?

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Function level V12R1M501 (or M501) – PI70535
§ New BIF LISTAGG
§ New ClientApplCompat property for data clients if data driver
packages are bound with APPLCOMPAT(V12R1M501)
- Restrictions relieved by PH08482

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New built-in function: LISTAGG
§ Introduced with function level V12R1M501
§ Syntax:
“LIST,” because it
generates a list of values
“AGG,” because it is
an aggregate function
.-ALL------.
>>-LISTAGG(-+----------+-string-expression-+--------------+-)--->
'-DISTINCT-' '-,--separator-'
>--+------------------------------------------------------+----><
| .-,---------------------. |
| V .-ASC--. | |
'-WITHIN GROUP--(--ORDER BY----sort-key--+------+--)-+-'
'-DESC-'
Removes duplicate values from list
What you want a list of
Values in list can be
separated by commas, or by
something else you specify
Optional clause – lets you
specify order of values in list

11. © 2019 IBM Corporation15
LISTAGG in action
§ Given this data:
§ This statement:
§ Yields this result:
EMPNO LASTNAME WORKDEPT
0001 THOMAS A01
0002 ROGERS B01
0003 HONG A01
0004 BARKER B01
0005 KOHL B01
EMPLOYEE table
SELECT WORKDEPT, LISTAGG(LASTNAME, ', ') WITHIN GROUP(ORDER BY LASTNAME)
AS EMPLOYEES
FROM EMPLOYEE
GROUP BY WORKDEPT;
WORKDEPT EMPLOYEES
-------------------------------
A01 HONG, THOMAS
B01 BARKER, KOHL, ROGERS
Comma-separated list of employees,
by department, in ascending last-name
order within department

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Function level V12R1M502 (or M502) – PI95511
§ Transparent data set encryption (TDE)
§ Explicit casting of numeric values to (VAR-) GRAPHIC

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Transparent dataset encryption (TDE)
§ Part of journey to pervasive encryption
- Administrative policy controls
- Application transparency – no application changes required
- Simplified encryption and reduced costs for protecting data
• Minimum HW: z196 with Central Processor Assist for Cryptographic Function
(CPACF) and Crypto Express3
• z14 includes CPACF on the chip and z14 Crypto Express6s for significant
cost reduction over z13 and previous – makes pervasive encryption feasible
- Encryption at data set level
• DFSMS encrypts data before I/O operation
- Requires Integrated Cryptographic Services Facility (ICSF) and RACF
(or equivalent) specific support
• z/OS 2.3 or z/OS 2.2 with OA50569 and OA53951

14. © 2019 IBM Corporation24
Transparent data set encryption (TDE)
z/OS data set,
e.g. Db2 cluster
KEY LABEL
ICSF
Key store
DB2DBM1
during OPEN
DFSMS assigns
the key
Decryption
during READ
Encryption
during WRITE
only during DEFINE

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Transparent data set encryption (TDE) in Db2
Encrypted data in a data set DEFINEd with KEY LABEL
only for extended format datasets
Before V12R1M502
Native z/OS options:
• RACF data set profile
• IDCAMS DEFINE
• SMS data class
With V12R1M502
New Db2 specifications
zPARM ENCRYPTION_KEYLABEL
• DEFINE new catalog/directory objects
• DEFINE new archive log data sets
SQL ALTER/CREATE with TABLE or
STOGROUP
• New option KEY LABEL
Utilities like REORG, … with
• IDCAMS DEFINE for new data sets
Display options, like:
• -DIS GROUP or REPORT utility or …
.
.
.

16. © 2019 IBM Corporation29
Function level V12R1M503 (or M503) – PH00506
§ Db2 AI for z/OS (Db2ZAI) – refer to next presentations
- V1.2 only requires code level of V12R1M503
§ Replication of system-period temporal tables and generated
expression columns

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Function level V12R1M504 (or M504) – PH07672
§ Deprecated objects
§ Huffman Compression
§ Pass-through BIF (IDAA)
§ New SQL syntax for special registers and NULL predicate

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Deprecated objects (V12R1M504)
e.g. CREATE
TABLESPACE
issued by application with
APPLCOMPAT < V12R1M504
issued by application with
APPLCOMPAT >= V12R1M504
SEGSIZE n Segmented Table Space UTS – PBG
SEGSIZE 0 &
NUMPARTS p
Classic Partitioned Table
Space
UTS – PBR
SEGSIZE n &
MAXPARTITIONS p
UTS – PBG UTS – PBG
SEGSIZE n &
NUMPARTS p
UTS – PBR UTS – PBR

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Deprecated objects (APPLCOMPAT V12R1M504)
§ Classic partitioned and segmented table spaces cannot any
longer be created by applications (e.g. DSNTEP2) with
APPLCOMPAT>=V12R1M504
§ Consideration: multi-table segmented table space
- Reorg to convert it to multiple UTS PBG will come in future
- Attention: DROP of such an object requires CREATE with
APPLCOMPAT<V12R1M504 to keep existing structure
§ You can no longer do the following:
- CREATE TABLE referencing an empty classic partitioned or any
segmented/simple table space
- CREATE/ALTER TABLE … ORGANIZE BY HASH
- CREATE SYNONYM
• Use CREATE ALIAS instead

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What is new besides continuous delivery?

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Function level independent enhancements – 1
§ PH00637 – DDL and concurrent dynamic SQL
§ PI98649 – Updates to REST Services
§ PH00572 – Suppress warning messages in DSNTEP2 etc.
TOLWARN(QUIET) suppress FETCH messages
if ≥0
§ PH01728 – New DSNZPARM FLASHCOPY_XRCP
§ PH02437 – DSNB233I warning to convert to extended LRSN
§ PH03263 – New Timestamp format support
§ PH05193 – Async Cross-invalidation (XI) support
§ PH05030 – zHyperlink Write for Db2 logs
§ PH00317 – New DSNZPARM to control NOPAD default for
REORG UNLOAD EXTERNAL or DISCARD

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Function level independent enhancements – 2
§ PH02362 – DSNREXX support for SET CURRENT
APPLICATION COMPATIBILITY register
§ PH03678 – New RUNSTATS keyword for DSNZPARM
STATCLGSRT (consider also PH09074)
§ PH04336 – SQLCA in MQSeries LISTENER if SQLcode ≠ 0
§ PH06082 – RLF enhancements, e.g. monitor update activity
on the active RLF tables and automatically
refresh the in-memory RLF tables (consider also
PH07658)

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zHyperLink
§ What is the purpose:
- Make synchronous I/O operations much faster: Reduce to ~20-40µs
§ How to get it:
- z14 with zHyperLink Express adapter (FC #0431) installed
• zHyperLink Express uses optical cable
- DS888x with I/O bay planar board and firmware level 8.3
- z/OS 2.1: OA50653 + more (e.g. OA51450, ...)
- Db2:
• PI82575 (V12) / PH01123 (V11): Data base synch read I/Os
• PH05030: Log writes for Db2 active logs
• Set new ZPARM ZHYPERLINK:
• Turning off: DISABLE
• Turning on data base read: DATABASE
• Turning on log write: ACTIVELOG
• Turning on data base read & log write: ENABLE

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zHyperLink – Additional considerations
§ Eligible if
- Synchronous data base read I/O and synchronous log write I/O
• CPU will spin similar as in CF requests
- Distance between z14 and DS888x <150m
• If distance is longer, then I/O processing as usual
- Data is in the disk controller cache
§ How to plan for eligible workload:
- zBNA tool (System z Batch Network Analyzer tool) at ASCB level
- Application level via accounting class 3
§ Consider: zHyperLink write support requires zHyperWrite
support in PPRC environment

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Continuous Delivery – additional information
https://www.youtube.com/watch?v=ldHOnyJXT3M
REDP5469 Exploring IBM Db2 for z/OS Continuous Delivery