Continuous Integration, Continuous Quality, Continuous Delivery
DB2 for z/OS: Continuous Delivery of New Features 12 Continuous Delivery June 2017.pdf · DB2 for...
-
Upload
truongnhan -
Category
Documents
-
view
225 -
download
0
Transcript of DB2 for z/OS: Continuous Delivery of New Features 12 Continuous Delivery June 2017.pdf · DB2 for...
DB2 for z/OS:
Continuous Delivery of
New Features
Chris Crone – DE DB2 Development
Presented by Mark Rader
WSC: DB2 for z/OS
© 2017 IBM Corporation2
Agenda
Why we are changing
Migration from DB2 11 to DB2 12
New Function Activation beyond base DB2 12
Catalog Changes
New Function Activation Scenarios
Summary
Appendix
Documentation Proposal
Vendor Support
© 2017 IBM Corporation
Why we are changing
© 2017 IBM Corporation4
DB2 for z/OS Today
We deliver most of our new function in a new release ~every 3 years
DB2 is on 3 year cycle, but many of our customers are on 4 year cycles, hence the interest in skip
release migrations
We develop or retrofit a very limited number of new features in the service stream, but only if
urgent and generally low risk
Deployment of new releases is seen as a disruption by our customers
Many of our customers want new features delivered much faster
Industry and customer trend is to move away from monolithic code delivery towards continuous
delivery model
IBM is moving towards continuous delivery model
Time for us in DB2 to change
© 2017 IBM Corporation5
Proposals Considered
Faster release cycle -- DB2 vNext in 18 months
DB2 CAC customers gave this a thumbs down
• Not able to take on such a fast migration due to the cost of any version/release migration
• The migration effort would be just as large as moving to a new DB2 version
• Even the promise of skip release migration couldn’t save this proposal
Continuous release cycles
DB2 V12.1, V12.2, V12.3, …. As you order V12, you get what is available
Considerable migration/coexistence challenges and high cost of forward fits
A combination of Service only and Continuous Delivery streams
Continuous delivery on one stream
© 2017 IBM Corporation6
Strategy for DB2 for z/OS
We are dedicating ourselves to going forward on a continuous delivery model
Radical internal changes are required within DB2 for z/OS Development to do this
DB2 12 is the starting point after GA
There will be significantly higher volume of continuously delivered items
Customers will see a single maintenance stream for DB2 12
New function delivered into that stream
New function will be designed to be easily consumable
Point releases or versions will be a very rare exception
There are reasons why we might want to have a point release or new version. For instance:
• To adopt a new compiler, extend control structures, or enable an architecture level set
DB2 for z/OS Development will have relentless focus on maintaining continuous production level
reliability for you in the service stream
We will deliver new function when the quality is right, and not based on a date
© 2017 IBM Corporation7
Using Design Thinking and Sponsor Users
A key component of Design Thinking methodology
Deliver items that customers will actually adopt and people believe in
If we cannot find sponsor users then we should not be doing it
Customer input which will be more targeted than before with ESPs
Strong focus on getting the design right up front
© 2017 IBM Corporation
Migration from DB2 11 to DB2 12
© 2017 IBM Corporation9
Function Level
DB2 already has a function level that we expose to applications
The RIBRELX is exposed via various interfaces and is available to applications after a “CONNECT”
statement. For instance the following info is available after a remote connect:
Database Connection Information
Database server = DB2 z/OS 12.1.5
SQL authorization ID = SYSADM
Local database alias = DB2A
RIBRELX values is defined as VV.R.M where M is the Mod level - Since DB2 8:
• Mod Levels 1-4 have been reserved for CM (New Function not Available for DB2 12)
• Mod Levels 5-9 have been reserved for NFM (New Function Available for DB2 12)
Proposal
Extend RIBRELX
Mod levels 100, 200, 300, and 400 will be New Function not Available
Mod level 500-999 will be New Function Available
© 2017 IBM Corporation10
Migration DB2 11 DB2 12
DB2 12
Catalog
Data Sharing
Coexistence
DB2 12 New
Function Not
Available
FL(V12R1M100)
DB2 12 New
Function
availableCATMAINT
UPDATE
(DSNTIJTC)
-ACTIVATE
FUNCTION
LEVEL
(V12R1M500)
DB2 11
Catalog
DB2 12
Libraries
DB2 11
Libraries
DB2 11
NFM With SPE
1 – 2 months
1 week
Bind with APPLCOMPAT(V10R1) or APPLCOMPAT(V11R1)
Bind with APPLCOMPAT(V10R1), APPLCOMPAT(V11R1), APPLCOMPAT(V12R1M500)
Co-existence
with or
fallback to
DB2 11 is
possible
Co-existence
with or
fallback to
DB2 11 is
NOT possible
© 2017 IBM Corporation11
-ACTIVATE FUNCTION LEVEL [Knowledge Center]
Important: On successful completion of the command, all function for the specified level, and any previous
levels becomes available. For migration to DB2 12 from DB2 11, the level of V12R1M100 (new function not
available) and V12R1M500 (new function available) are the base function levels. Once V12R1M500 is
adopted, coexistence with and fallback to Version 11 are not possible. Version 11 cannot start. Use of this
command requires that the data sharing group contains no active Version 11 members.
Abbreviation:-ACTIVATE FUNCTION LEVEL(function-level)
Environment: The command can be issued from a z/OS console, a DSN session under TSO, a DB2I panel
(DB2 COMMANDS), an IMS or CICS terminal, or a program using the instrumentation facility interface (IFI).
Data sharing scope: Group
Authorization: To execute this command, you must use a privilege set of the process that includes install
SYSADM.
>>-ACTIVATE-FUNCTION-LEVEL-(VxxRyMxxx)--+-------+--><|-TEST--|
© 2017 IBM Corporation12
-ACTIVATE FUNCTION LEVEL
DSN7100I -DB1A DSN7GCMD
-DB2A ACTIVATE FUNCTION LEVEL (V12R1M500)
*** BEGIN ACTIVATE FUNCTION LEVEL (V12R1M500)
FUNCTION LEVEL (V12R1M500) SUCCESSFULLY ACTIVATED
CATALOG LEVEL(V12R1M500)
CURRENT FUNCTION LEVEL(V12R1M500)
HIGHEST ACTIVATED FUNCTION LEVEL(V12R1M500)
HIGHEST POSSIBLE FUNCTION LEVEL(V12R1M500)
DSN9022I -DB2A DSNZACMD '-ACTIVATE FUNC' NORMAL COMPLETION
© 2017 IBM Corporation
New Function Activation beyond base DB2 12
© 2017 IBM Corporation14
Acronyms
Maintenance level (ML)
DB2LVL on –DIS GROUP output
Sometimes called ‘code level’
Catalog level (CL)
Result of DSNTIJCT job, aka ‘catmaint’
Function level (FL)
Result of –ACTIVATE FUNCTION LEVEL command
APPLCOMPAT level (APPLV)
Result of BIND, REBIND, or SET CURRENT APPLICATION COMPATIBILITY
© 2017 IBM Corporation15
Maintenance
Rolled in
DB2 12R1M501
New Function
available
-ACTIVATE
FUNCTION LEVEL
(V12R1M501)
DB2
V12R1M500
Catalog
DB2
V12R1M501
Libraries
DB2
V12R1M500
Libraries
DB2 12
(V12R1M500)
1 week
Bind with APPLCOMPAT V10R1, V11R1, V12R1M500
SET CURRENT APPLICATION COMPATIBILITY V10R1, V11R1, V12R1M500
Bind with APPLCOMPAT V10R1, V11R1, V12R1M500, or V12R1M501
SET CURRENT APPLICATION COMPATIBILITY V10R1, V11R1, V12R1M500, or V12R1M501
DB2 V12R1M501
New Function
Not Available
FL M501
Libraries
must remain
active
New function activation no Catalog Change
© 2017 IBM Corporation16
New function activation with Catalog Change
DB2
V12R1M502
Catalog
DB2 V12R1M502
New Function
Not Available CATMAINT
UPDATE
For
V12R1M502DB2
V12R1M501
Catalog
DB2
V12R1M502
Libraries
DB2
V12R1M501
Libraries
DB2 12
(V12R1M501)
1 week
Bind with APPLCOMPAT V10R1, V11R1, V12R1M500, V12R1M501
Bind with APPLCOMPAT V10R1, V11R1, V12R1M500, V12R1M501, or V12R1M502
DB2 12R1M502
New Function
available
-ACTIVATE
FUNCTION LEVEL
(V12R1M502)
Maintenance
Rolled in
Note that once CATMAINT has been run, all members must started at a ML that supports ML502 or above
FL M502
Libraries
must remain
active
© 2017 IBM Corporation17
New function activation with Catalog Change – Skip FLs
DB2
V12R1M505
Catalog
CATMAINT
UPDATE
For
V12R1M505DB2
V12R1M502
Catalog
DB2
V12R1M507
Libraries
DB2
V12R1M502
Libraries
DB2 12
(V12R1M502)
1 week
Bind with APPLCOMPAT V10R1, V11R1, V12R1M500 - V12R1M502
Bind with APPLCOMPAT V10R1, V11R1, V12R1M500 – V12R1M502, V12R1M503 - V12R1M507
DB2 12R1M507
New Function
available
-ACTIVATE
FUNCTION LEVEL
(V12R1M507)
Maintenance
Rolled in
Note that once CATMAINT has been run, all members must started at a ML that supports ML505 or above
FL M505
Libraries
must remain
active
FL M507
Libraries
must remain
active
© 2017 IBM Corporation18
Function activation of Previous Level (* Mode)
DB2 12R1M500*
Function
available
-ACTIVATE
FUNCTION LEVEL
(V12R1M500*)
DB2
V12R1M500
Catalog
DB2
V12R1M501
Libraries
DB2 12
(V12R1M501)
DB2 V12R1M501
New Function
Available
Bind with APPLCOMPAT V10R1, V11R1, V12R1M500, or V12R1M501
SET CURRENT APPLICATION COMPATIBILITY V10R1, V11R1, V12R1M500, or V12R1M501
Bind with APPLCOMPAT V10R1, V11R1, V12R1M500
SET CURRENT APPLICATION COMPATIBILITY V10R1, V11R1, V12R1M500
REBIND with existing APPLCOMPAT INCLUDING V12R1M501
SET CURRENT APPLICATION COMPATIBILITY up to APPLCOMPAT value
FUNCTION LEVEL M501 Libraries
must remain active
© 2017 IBM Corporation19
-ACTIVATE FUNCTION LEVEL (to a lower level)
DSN7100I -DB1A DSN7GCMD
-DB2A ACTIVATE FUNCTION LEVEL (V12R1M100)
*** BEGIN ACTIVATE FUNCTION LEVEL (V12R1M100)
FUNCTION LEVEL (V12R1M100) SUCCESSFULLY ACTIVATED
CATALOG LEVEL(V12R1M500)
CURRENT FUNCTION LEVEL(V12R1M100*)
HIGHEST ACTIVATED FUNCTION LEVEL(V12R1M500)
HIGHEST POSSIBLE FUNCTION LEVEL(V12R1M500)
DSN9022I -DB2A DSNZACMD '-ACTIVATE FUNC' NORMAL COMPLETION
© 2017 IBM Corporation20
SELECT * FROM SYSIBM.SYSLEVELUPDATES
+---------+---------+---------+---------+-----+-------------------+
|FUNCTION_|PREV_FUNC|HIGH_FUNC|CATALOG_ |OPERA|EFFECTIVE_TIME |
|LVL |TION_LV |TION_LVL |LVL |TION_| |
| | | | |TYPE | |
|---------|---------|---------|---------|-----|-------------------|
1_|V12R1M500|V12R1M100|V12R1M500|V12R1M500|M |2016-06-27 07:31:18|
2_|V12R1M100|V12R1M500|V12R1M500|V12R1M500|F |2016-07-29 14:57:43|
3_|V12R1M500|V12R1M100|V12R1M500|V12R1M500|F |2016-07-29 15:06:47|
+---------+---------+---------+---------+-----+-------------------+
+-----+------------------------------------+-------+
|EFFEC|OPERATION_TEXT |GROUP_ |
|TIVE_| |MEMBER |
|LRSN | | |
|-----|------------------------------------|-------|
1_| … |CATMAINT PROCESSING - DB2DEV | |
2_| … |-ACTIVATE FUNCTION LEVEL (V12R1M100)| |
2_| … |-ACTIVATE FUNCTION LEVEL (V12R1M500)| |
+-----+------------------------------------+-------+
© 2017 IBM Corporation21
Relationship between Maintenance and Function Level
The Function Level (FL) that a DB2 member is capable of running is directly related to the
maintenance level (ML) of that member
The FL of a DB2 Member is associated with one or more PTFs
An RSU level (monthly or quarterly) may or may not contain PTFs for one or more Function Levels
All members must be capable of supporting a FL before that FL can be activated
Each member has a FL capability – that is the code running on that member is capable of supporting a
specific FL
Maintenance is member scope – members can run code capable of supporting different FLs
FL activation is group scope
Once a FL is active, then all members joining that group must be capable of supporting that FL
It is possible to return to a previous FL
E.G. if you are a FL V12R1M506, you can return to V12R1M504* (wherever I came from). The * will
indicate that the group has previously been at a higher FL
All existing usage of a feature of a FL will continue to be allowed, but new exploitation of the previous FL
will be prevented
Returning to a previous FL will still require that all members joining a group must support the highest
activated FL ever set for the group
© 2017 IBM Corporation22
Relationship between a Function Level and APPLCOMPAT
The APPLCOMPAT Level (APPLV) of a package is directly related to the Function Level of the
group.
You may not BIND (or set in any other way) an APPLV that is higher than the current FL of the group.
APPLCOMPAT controls DML (SQL and XML), DDL, and DCL (GRANT and REVOKE) capability in an
application (Package). In order to use a function that requires a specific APPLV, the FL for the group must
be at the specific APPLV or Higher – to allow the APPLV to be specified.
The default APPLCOMPAT level for new BINDs is controlled by the zPARM (BAU)
The default APPLCOMPAT level for REBIND is the value currently in the catalog, however it can be
changed by explicitly specifying a specific value on the REBIND.
There is no (urgent) need to change an APPLCOMPAT value for an application that has already been
deployed – there should be nothing that an application that has already been tested and deployed would
need from an new APPLCOMPAT level.
© 2017 IBM Corporation23
The DB2 Catalog – new concept Catalog Level (CL)
There is usually a direct relation between the DB2 catalog and the DB2 code
Traditionally catalog and code are tightly in sync
DB2 12 migration is an example of this
• When you start DB2 12, you must run CATMAINT before doing anything else
The introduction of the FL will soften this relationship
A catalog change will not be required until the FL that requires that change is activated
A catalog change may require a FL be active before the catalog change occurs
• i.e. Preconditioning
A CL will require all members be at a level that supports the change – this is similar to FL activation.
This implementation will seem familiar to CM, ENFM and NFM in the sense that the concepts are similar
• Running with new maintenance is like running in CM – you can back the maintenance off
• Running CATMAINT prevents backing off any maintenance that is required by that CL – this is similar to ENFM in
the past (you can’t fall back)
• -ACTIVATE FUNCTION LEVEL enables usage of new function (this is similar to NFM)
© 2017 IBM Corporation24
-DISPLAY GROUP (DB2 11)
DSN7100I -DB1A DSN7GCMD
*** BEGIN DISPLAY OF GROUP(.......) CATALOG LEVEL(111)
NEW FUNCTION(X) PROTOCOL LEVEL(2)
GROUP ATTACH NAME(....)
--------------------------------------------------------------------
DB2 DB2 SYSTEM IRLM
MEMBER ID SUBSYS CMDPREF STATUS LVL NAME SUBSYS IRLMPROC
-------- --- ---- -------- -------- --- -------- ---- --------
DB1A 1 DB1A -DB1A ACTIVE 111 MVSA DJ1A DB1AIRLM
DB1B 2 DB1B -DB1B ACTIVE 111 MVSB DJ1B DB1BIRLM
DB1C 3 DB1C -DB1C ACTIVE 111 MVSC DJ1C DB1CIRLM
DB1D 4 DB1D -DB1D QUIESCED 111 MVSD DJ1D DB1DIRLM
--------------------------------------------------------------------
SCA STRUCTURE SIZE: 1024 KB, STATUS= AC, SCA IN USE: 11 %
LOCK1 STRUCTURE SIZE: 1536 KB
NUMBER LOCK ENTRIES: 262144
NUMBER LIST ENTRIES: 7353, LIST ENTRIES IN USE: 0
*** END DISPLAY OF GROUP(DSNDB10 )
DSN9022I -DB1A DSN7GCMD 'DISPLAY GROUP ' NORMAL COMPLETION
© 2017 IBM Corporation25
-DISPLAY GROUP (coexistence) – From DB2 12 member
DSN7100I -DB1A DSN7GCMD
*** BEGIN DISPLAY OF GROUP(.......) CATALOG LEVEL(V12R1M500)
CURRENT FUNCTION LEVEL(V11R1M500)
HIGHEST ACTIVATED FUNCTION LEVEL(V11R1M500)
HIGHEST POSSIBILE FUNCTION LEVEL(V11R1M500)
PROTOCOL LEVEL(2)
GROUP ATTACH NAME(....)
-----------------------------------------------------------------------
DB2 DB2 SYSTEM IRLM
MEMBER ID SUBSYS CMDPREF STATUS LVL NAME SUBSYS IRLMPROC
-------- --- ---- -------- -------- ------ -------- ---- --------
DB1A 1 DB1A -DB1A ACTIVE 121500 MVSA DJ1A DB1AIRLM
DB1B 2 DB1B -DB1B ACTIVE 121500 MVSB DJ1B DB1BIRLM
DB1C 3 DB1C -DB1C ACTIVE 121500 MVSC DJ1C DB1CIRLM
DB1D 4 DB1D -DB1D QUIESCED 111500 MVSD DJ1D DB1DIRLM
-----------------------------------------------------------------------
SCA STRUCTURE SIZE: 1024 KB, STATUS= AC, SCA IN USE: 11 %
LOCK1 STRUCTURE SIZE: 1536 KB
NUMBER LOCK ENTRIES: 262144
NUMBER LIST ENTRIES: 7353, LIST ENTRIES IN USE: 0
*** END DISPLAY OF GROUP(DSNDB10 )
DSN9022I -DB1A DSN7GCMD 'DISPLAY GROUP ' NORMAL COMPLETION
Maintenance
level (ML)
Catalog
level
(CL)
Function
level (FL)
© 2017 IBM Corporation26
-DISPLAY GROUP (new function not available)
DSN7100I -DB1A DSN7GCMD
*** BEGIN DISPLAY OF GROUP(.......) CATALOG LEVEL(V12R1M500)
CURRENT FUNCTION LEVEL(V12R1M100)
HIGHEST ACTIVATED FUNCTION LEVEL(V12R1M100)
HIGHEST POSSIBILE FUNCTION LEVEL(V12R1M500)
PROTOCOL LEVEL(2)
GROUP ATTACH NAME(....)
-----------------------------------------------------------------------
DB2 DB2 SYSTEM IRLM
MEMBER ID SUBSYS CMDPREF STATUS LVL NAME SUBSYS IRLMPROC
-------- --- ---- -------- -------- ------ -------- ---- --------
DB1A 1 DB1A -DB1A ACTIVE 121500 MVSA DJ1A DB1AIRLM
DB1B 2 DB1B -DB1B ACTIVE 121500 MVSB DJ1B DB1BIRLM
DB1C 3 DB1C -DB1C ACTIVE 121503 MVSC DJ1C DB1CIRLM
DB1D 6 DB1D -DB1D ACTIVE 121503 MVSD DJ1D DB1DIRLM
-----------------------------------------------------------------------
SCA STRUCTURE SIZE: 1024 KB, STATUS= AC, SCA IN USE: 11 %
LOCK1 STRUCTURE SIZE: 1536 KB
NUMBER LOCK ENTRIES: 262144
NUMBER LIST ENTRIES: 7353, LIST ENTRIES IN USE: 0
*** END DISPLAY OF GROUP(DSNDB10 )
DSN9022I -DB1A DSN7GCMD 'DISPLAY GROUP ' NORMAL COMPLETION
Maintenance
level (ML)
Catalog
level
(CL)
Function
level (FL)
© 2017 IBM Corporation27
-DISPLAY GROUP (New Function Active – but backed off to M502)
DSN7100I -DB1A DSN7GCMD
*** BEGIN DISPLAY OF GROUP(.......) CATALOG LEVEL(V12R1M501)
CURRENT FUNCTION LEVEL(V12R1M502*)
HIGHEST ACTIVATED FUNCTION LEVEL(V12R1M503)
HIGHEST POSSIBILE FUNCTION LEVEL(V12R1M505)
PROTOCOL LEVEL(2)
GROUP ATTACH NAME(....)
-----------------------------------------------------------------------
DB2 DB2 SYSTEM IRLM
MEMBER ID SUBSYS CMDPREF STATUS LVL NAME SUBSYS IRLMPROC
-------- --- ---- -------- -------- ------ -------- ---- --------
DB1A 1 DB1A -DB1A ACTIVE 121505 MVSA DJ1A DB1AIRLM
DB1B 2 DB1B -DB1B ACTIVE 121505 MVSB DJ1B DB1BIRLM
DB1C 3 DB1C -DB1C ACTIVE 121505 MVSC DJ1C DB1CIRLM
DB1D 4 DB1D -DB1D ACTIVE 121507 MVSD DJ1D DB1DIRLM
-----------------------------------------------------------------------
SCA STRUCTURE SIZE: 1024 KB, STATUS= AC, SCA IN USE: 11 %
LOCK1 STRUCTURE SIZE: 1536 KB
NUMBER LOCK ENTRIES: 262144
NUMBER LIST ENTRIES: 7353, LIST ENTRIES IN USE: 0
*** END DISPLAY OF GROUP(DSNDB10 )
DSN9022I -DB1A DSN7GCMD 'DISPLAY GROUP ' NORMAL COMPLETION
© 2017 IBM Corporation28
-DISPLAY GROUP (after catmaint)
DSN7100I -DB1A DSN7GCMD
*** BEGIN DISPLAY OF GROUP(.......) CATALOG LEVEL(V12R1M506)
CURRENT FUNCTION LEVEL(V12R1M502*)
HIGHEST ACTIVATED FUNCTION LEVEL(V12R1M503)
HIGHEST POSSIBILE FUNCTION LEVEL(V12R1M507)
PROTOCOL LEVEL(2)
GROUP ATTACH NAME(....)
-----------------------------------------------------------------------
DB2 DB2 SYSTEM IRLM
MEMBER ID SUBSYS CMDPREF STATUS LVL NAME SUBSYS IRLMPROC
-------- --- ---- -------- -------- ------ -------- ---- --------
DB1A 1 DB1A -DB1A ACTIVE 121507 MVSA DJ1A DB1AIRLM
DB1B 2 DB1B -DB1B ACTIVE 121507 MVSB DJ1B DB1BIRLM
DB1C 3 DB1C -DB1C ACTIVE 121507 MVSC DJ1C DB1CIRLM
DB1D 4 DB1D -DB1D ACTIVE 121507 MVSD DJ1D DB1DIRLM
-----------------------------------------------------------------------
SCA STRUCTURE SIZE: 1024 KB, STATUS= AC, SCA IN USE: 11 %
LOCK1 STRUCTURE SIZE: 1536 KB
NUMBER LOCK ENTRIES: 262144
NUMBER LIST ENTRIES: 7353, LIST ENTRIES IN USE: 0
*** END DISPLAY OF GROUP(DSNDB10 )
DSN9022I -DB1A DSN7GCMD 'DISPLAY GROUP ' NORMAL COMPLETION
© 2017 IBM Corporation29
-DISPLAY GROUP (proposal for a new V or R)
DSN7100I -DB1A DSN7GCMD
*** BEGIN DISPLAY OF GROUP(.......) CATALOG LEVEL(V12R2M100)
CURRENT FUNCTION LEVEL(V12R1M502*)
HIGHEST ACTIVATED FUNCTION LEVEL(V12R1M503)
HIGHEST POSSIBILE FUNCTION LEVEL(V12R1M505)
PROTOCOL LEVEL(2)
GROUP ATTACH NAME(....)
-----------------------------------------------------------------------
DB2 DB2 SYSTEM IRLM
MEMBER ID SUBSYS CMDPREF STATUS LVL NAME SUBSYS IRLMPROC
-------- --- ---- -------- -------- ------ -------- ---- --------
DB1A 1 DB1A -DB1A ACTIVE 122100 MVSA DJ1A DB1AIRLM
DB1B 2 DB1B -DB1B ACTIVE 122100 MVSB DJ1B DB1BIRLM
DB1C 3 DB1C -DB1C ACTIVE 121505 MVSC DJ1C DB1CIRLM
DB1D 4 DB1D -DB1D ACTIVE 121507 MVSD DJ1D DB1DIRLM
-----------------------------------------------------------------------
SCA STRUCTURE SIZE: 1024 KB, STATUS= AC, SCA IN USE: 11 %
LOCK1 STRUCTURE SIZE: 1536 KB
NUMBER LOCK ENTRIES: 262144
NUMBER LIST ENTRIES: 7353, LIST ENTRIES IN USE: 0
*** END DISPLAY OF GROUP(DSNDB10 )
DSN9022I -DB1A DSN7GCMD 'DISPLAY GROUP ' NORMAL COMPLETION
© 2017 IBM Corporation30
Function Level Adoption – Best Practices
PTFs (RSUs…) are applied that may increase the Code Level (CL) of a DB2 system
After system is stable on maintenance, execute (if any) catmaint
After execution of catmaint, the system can only be started with a CL that supports the catalog
Activate Function Level
Function not related to SQL, DML, DCL syntax is available
REBIND of packages with any APPLCOMPAT would pick up optimizer enhancements
Non-stabilized dynamic SQL would pick up optimizer / other non-APPLCOMPAT related enhancements
© 2017 IBM Corporation31
APPLCOMPAT Adoption – Best Practices
After Function Level is considered stable - allow new application feature rollout.
REBIND DBA packages to allow new DDL to be utilized
REBIND application static packages with higher APPLCOMPAT to exploit DDL/DML new
functions/behaviors
REBIND dynamic packages with higher APPLCOMPAT to allow new SQL functions to be used
REBIND distributed packages (***in separate collection) to allow new SQL functions to be used
• Switch applications to use new distributed package collection
Leverage PLANMGMT extended
• REBIND SWITCH (PREVIOUS) to restore static to prior runtime structures
• REBIND SWITCH (PREVIOUS) for dynamic would restore prior APPLCOMPAT
• ***switching to prior collid for distributed dynamic would restore APPLCOMPAT
© 2017 IBM Corporation
Applications
© 2017 IBM Corporation33
Static SQL, DDL, and DCL
In DB2 11, Static SQL is controlled by APPLCOMPAT BIND option
In DB2 11, DML and DCL is controlled by CM/NFM
DB2 12 needs to take into account function levels changing more often and the need to control
applications’ use of new function across one or more function levels
In DB2 12, the APPLCOMPAT BIND option is extended to support function levels (e.g. V12R1M501)
In DB2 12, the APPLCOMPAT BIND option is extended to support DDL and DCL, in addition to DML
© 2017 IBM Corporation34
Dynamic SQL, DDL, and DCL
In DB2 11, by default, Dynamic SQL executed under the APPLCOMPAT Bind Option
Could be V10R1 or V11R1
• SET CURRENT APPLICATION COMPATIBLITY could be used to SET to V11R1 if in NFM
DB2 12 needs to take into account function levels changing more often and the need to control
applications use of new function across one or more function levels
In DB2 12 the APPLCOMPAT BIND option is extended to support function levels (e.g. V12R1M501) for
both STATIC and DYNAMIC SQL, DDL and DCL
The APPLCOMPAT BIND OPTION controls the MAX value that can be specified in SET CURRENT
APPLICATION COMPATIBILITY
An APPLCOMPAT level will remain active even if the FL is lowered to a * mode (e.g. M501->M500*)
• REBIND of the current APPLCOMPAT value is allowed even if the value exceeds the current *mode FL
• SET CURRENT APPLICATION COMPATIBILITY continues to be allowed up to the value specified on
BIND/REBIND for APPLCOMPAT
© 2017 IBM Corporation35
New Global Variables
PRODUCTID_EXT
Contains the extended product identifier of the database manager that invoked the function.
The format of the extended product identifier values is pppvvrrmmm, where ppp is a 3- letter product code (such as
DSN for DB2®), vv is the version, rr is the release, and mmm is the modification level (such as '100', '500', '501'). For
example, DSN1201500 identifies DB2 12 after the activation of DB2 12 new function (function level 500 or higher).
CATALOG_LEVEL
Contains the level of the current catalog level.
The format of the catalog level values is VvvRrMmmm, where vv is the version, r is the release, and mmm is the
modification level (such as '100', '500', '501'). For example, V12R1M500 identifies DB2 12 after the activation of DB2
12 new function (function level 500 or higher).
DEFAULT_SQLLEVEL
Contains the value of the default value of the SQLLEVEL SQL processing option (DECPSQLLV).
The format of the default SQL level values is V10R1, V11R1, or VvvRrMmmm, where vv is the version, r is the
release, and mmm is the modification level (such as '100', '500', '501'). For example, V12R1M500 identifies DB2 12
after the activation of DB2 12 new function.
DB2 V11 can query the new built-in global variables. Their values will be:
SYSIBM.PRODUCTID_EXT: DSN111500
SYSIBM.CATALOGLEVEL: V12R1M500
SYSIBM.DEFAULT_SQLLEVEL: NULL
© 2017 IBM Corporation
IBM Data Server Drivers
- ODBC/CLI
- JDBC
© 2017 IBM Corporation37
New client property to control new function - clientApplCompat
Any level of DB2 Connect drivers should work with DB2 V12, both before and after new function is
activated with no behavior change.
Data server clients and drivers must be at the following levels to exploit DB2 for z/OS function-level
application compatibility of V12R1M501 or greater:
IBM® Data Server Driver for JDBC and SQLJ: Versions 3.72 and 4.22, or later
Other IBM data server clients and drivers: DB2 for Linux, UNIX, and Windows Version 11.1 Modification 1
Fix Pack, or later
clientApplCompat lets you control the capability of the client when updated drivers ship changes to
enable new sever capability. You might what specific control of driver capability when:
DB2 client driver introduces new behavior currently not controlled by DB2 application compatibility
Change needs to be controlled at the application level to ensure compatibility with new behavior
clientApplCompat V12R1M500 is required to access DB2 12 Server capability shipped after GA at
function levels beyond DB2 V12R1M500.
© 2017 IBM Corporation38
Driver Level clientApplCompat
setting
APPLCOMPAT
setting***
Application Capability
V10.5 FP2(-)
V11
V11 FP1(+)
n/a
n/a
not provided
V10R1
V11R1
V12R1M100
V12R1M500
Applications may exploit DB2 10 functionality
Applications may exploit DB2 11 functionality
Applications may exploit DB2 11 functionality
Applications may exploit DB2 V12R1M500 functionality
V10.5 FP2(-)
V11
V11 FP1(+)
n/a
n/a
not provided
V12R1M501 –
V12R1M5xx
SQLCODE -30025
Function Level V12R1M501 has a dependency on
clientApplCompat being set
V11 FP1(+) V12R1M500
To Exploit function
level V12R1M501
and beyond,
clientApplCompat
must be set
V10R1
V11R1
V11R1M100
V12R1M501
V12R1M5xx –
V12R1M5(zz-1)
Applications may exploit DB2 10 functionality
Applications may exploit DB2 11 functionality
Applications may exploit DB2 11 functionality
Applications may exploit DB2 V12R1M501 functionality
Applications may exploit DB2 V12R1M5xx functionality
Applications may exploit DB2 V12R1M5(zz-1)
functionality
V11 FP1(+) V12R1M501(+) V12R1M500 SQLCODE -30025
clientApplCompat must not exceed the server
APPLCOMPAT setting
Vyy Fpy ### V12R1M5zz V12R1M5zz Applications may exploit DB2 V12R1M5zz functionality
Future function that requires new DRDA data flow
***This is the APPLCOMPAT setting for the IBM Data Server Driver Packages specified by the collection id ### Hypothetical future Driver fixpack needed to support a DB2 for z/OS server change at FL V12R1M5zz
clientApplCompat relationship to DB2 APPLCOMPAT
© 2017 IBM Corporation39
Data Server Drivers - Pre DB2 11 FP1*
DB2
V12R1M100
-ACTIVATE NEW
FUNCTION
(V12R1M501)
No change in client behavior
Server Capability is limited to APPLCOMPAT(V12R1M500)
DB2
V12R1M501
Libraries
DB2
V12R1M500
Catalog
DB2
V12R1M500
Bind with APPLCOMPAT V10R1, V11R1, V12R1M100
SET CURRENT APPLICATION COMPATIBILITY V10R1, V11R1, V12R1M100
Bind with APPLCOMPAT V10R1, V11R1, V12R1M100, V12R1M500
SET CURRENT APPLICATION COMPATIBILITY V10R1, V11R1, V12R1M100, V12R1M500
*Including any any Data Server Driver post DB2 11 FP1 if clientApplCompat = V12R1M500 is not specified
-ACTIVATE NEW
FUNCTION
(V12R1M500)DB2
V12R1M501
FL M501
Libraries
must remain
active
© 2017 IBM Corporation40
Data Server Drivers - DB2 11 FP1(+)
DB2
V12R1M100
-ACTIVATE NEW
FUNCTION
(V12R1M501)
No change in client behavior – No need to change clientApplcompat until a new DRDA flow is required
DB2
V12R1M501
Libraries
DB2
V12R1M500
Catalog
DB2
V12R1M500
Bind with APPLCOMPAT V10R1, V11R1, V12R1M100
SET CURRENT APPLICATION COMPATIBILITY V10R1, V11R1, V12R1M100
Bind with APPLCOMPAT V10R1, V11R1, V12R1M100, V12R1M500
SET CURRENT APPLICATION COMPATIBILITY V10R1, V11R1, V12R1M100, V12R1M500
Run DSNTIJLC or
DSNTIJLR JOB to
BIND COPY CLIENT PACKAGES
setting COLLECTION and
APPLCOMPAT TO “V12R1M500”
Bind with APPLCOMPAT V10R1, V11R1, V12R1M100, V12R1M500, V12R1M501
SET CURRENT APPLICATION COMPATIBILITY V10R1, V11R1, V12R1M100, V12R1M500, V12R1M501
-ACTIVATE NEW
FUNCTION
(V12R1M500)DB2
V12R1M501
FL M501
Libraries
must remain
active
© 2017 IBM Corporation41
clientApplCompat – control of future function
DB2 12 only allows the new client behavior to control behavior when the APPLCOMPAT package
at the server supports that level of client server function.
We anticipate that at some point in the future, a new server feature will require a new
clientApplCompat level.
For example let’s say a new datatype is added in DB2 12 at DB2 function level DB2 V12R1M5zz.
At that point, client-server applications wanting to exploit that new capability will need to have:
Packages bound at the server with APPLCOMPAT(V12R1M5zz)
clientApplCompat set to V12R1M5zz
A clientApplCompat that exceeds the Server APPLCOMPAT bind option for the data server driver
packages will result in:
-30025 EXECUTION FAILED BECAUSE FUNCTION NOT SUPPORTED BY THE SERVER: LOCATION
location-name PRODUCT ID product-identifier REASON reason-code (sub-code)
Although you “can” advance your clientApplCompat as you increase the APPLCOMPAT of the
data server driver packages – it will only be necessary when new client capability needs to be
exploited.
Best Practice – only change your clientApplCompat when necessary
© 2017 IBM Corporation42
SQLCA and GET DIAGNOSTIC impacts
SQL CONNECT is enhanced to return the DB2 product ID and its current and functional level of
the connected server in the generated SQLCA
Information about the server is placed in the SQLERRP and SQLERRMC fields
Information in the SQLERRP field contains the server product information• It contains the following information:
• ppp is the product identifier:
'AQT' IBM® DB2 Analytics Accelerator for z/OS
'ARI' DB2 Server for VSE & VM
'DSN' DB2 for z/OS
'JCC' IBM Data Server Driver for JDBC and SQLJ
'QSQ' DB2 for i
'SQL' DB2 for Linux, UNIX, and Windows
• vv The version identifier such as '11' for Version 11.
• rr The release identifier such as '01'.
• m The modification level.
Information in the SQLERRMC field contains the functional levels
• First token contains the functional level of the connected DB2 (e.g. ‘V12R1M506’).
Clients adding new APIs to retrieve the current DB2 functional level
© 2017 IBM Corporation43
DDF Commands and Messages
-DISPLAY LOCATION
Changed to show the functional level of each connected system
DDF Location Statistics
Changed to show the functional level of each connected system
DDF Accounting Header
Changed to show the functional level of the connected systems
© 2017 IBM Corporation44
What the Clients see after Connect
CLI introduce a new infotype SQL_DBMS_FUNCTIONLVL for SQLGetInfo api that will return the
function level/buildlevel.
JCC introduce a new getDatabaseFunctionalLevel() API driver that will return a string.
DB2 LUW returns build level (e.g. "n1604281900").
DB2 Z returns function level (e.g. "V12R1M504").
© 2017 IBM Corporation
Catalog changes
© 2017 IBM Corporation46
New catalog table SYSIBM.SYSLEVELUPDATES
A row will be inserted into this table during ACTIVATE FUNCTION LEVEL and CATMAINT UPDATE
Column name Data type Description
FUNCTION_LVL VARCHAR(10) Function level when this record is inserted
PREV_FUNCTION_LVL VARCHAR(10) Previous function level
HIGH_FUNCTION_LVL VARCHAR(10) Highest activated function level
CATALOG_LVL VARCHAR(10) Catalog level when this record is inserted
OPERATION_TYPE CHAR(1) Type of operation : ‘C’ for catalog change, ‘F for function
level, ‘M’ for maintenance update (some form of special
catmaint for instance)
EFFECTIVE_TIME TIMESTAMP(12) Time when a change in function or catalog level has
completed.
EFFECTIVE_LRSN CHAR(10) RBA (or LRSN for data sharing) at the time when a change
in function or catalog level has completed.
OPERATION_TEXT VARCHAR(256) The text of the operation.
GROUP_MEMBER VARCHAR(24) Name of the group member on which the operation was
executed.
© 2017 IBM Corporation47
FUNCTION_LVL PREV_FUNCTION_LEVEL
HIGH_FUNCTION_LEVEL
CATALOG_LVL OPERATION_TYPE
EFFECTIVE_TIME
OPERATION_TEXT
V12R1M100 V11R1M500 V12R1M100 V12R1M500 C TIME 1 CATMAINT UPDATE UNLDDN V12R1M500
V12R1M500 V12R1M100 V12R1M500 V12R1M500 F TIME 2 ACTIVATE FUNCTION LEVEL(V12R1M500)
V12R1M503 V12R1M500 V12R1M503 V12R1M500 F TIME 3 ACTIVATE FUNCTION LEVEL(V12R1M503)
V12R1M500 V12R1M503 V12R1M503 V12R1M500 F TIME 4 ACTIVATE FUNCTION LEVEL(V12R1M500)
V12R1M500 V12R1M503 V12R1M503 V12R1M505 C TIME 5 CATMAINT UPDATE UNLDDN V12R1M505
V12R1M505 V12R1M500* V12R1M505 V12R1M505 F TIME 6 ACTIVATE FUNCTION LEVEL(V12R1M505)
New catalog table SYSIBM.SYSLEVELUPDATES
© 2017 IBM Corporation48
New Catalog Columns
Table Name Column Name Data Type Description
SYSACCELERATEDPACKAGES
SYSDYNQRY
SYSPACKCOPY
SYSPACKAGE
SYSQUERY
FNLEVEL VARCHAR(10) Function level of the
package/query at the
time the row was
inserted
SYSCONTROLS
SYSINDEXES
SYSROUTINES
SYSTABLES
REGENERATETS TIMESTAMP(12) Time when the object
was regenerated or
altered
SYSKEYS
SYSENVIRONMENT
CREATEDTS TIMESTAMP(12) Time when the row was
inserted
Listed above are the new columns which have been added in places where
we do not already have timestamp columns. We are not listing all the
existing timestamp columns that could be used with SYSLEVELUPDATES
in a similar fashion to that described on the previous slide.
© 2017 IBM Corporation49
SELECT LVU.FUNCTION_LVL, LVU.CATALOG_LVL, LVU.EFFECTIVE_TIME,LVU.OPERATION_TEXT
FROM SYSIBM.SYSTABLES AS TAB,SYSIBM.SYSLEVELUPDATES AS LVU
WHERE TAB.CREATOR = 'MY' AND TAB.NAME = 'TABLE1'AND TAB.CREATEDTS > LVU.EFFECTIVE_TIME
ORDER BY LVU.EFFECTIVE_TIME DESCFETCH FIRST 1 ROWS ONLY
Query to find the catalog level and function level when table MY.TABLE1 was created.
Query to find when function level 505 was activated.
FUNCTION_LVL CATALOG_LVL EFFECTIVE_TIME OPERATION_TEXT
V12R1M503 V12R1M500 TIME 3 ACTIVATE FUNCTION LEVEL
(V12R1M503)
SELECT …
FROM SYSLEVELUPDATES AS LVU
WHERE LVU.FUNCTION_LVL = 'V12R1M505'
FUNCTION_LVL PREV_FUNC_LVL HIGH_FUNC_LVL CATALOG_LVL EFFECTIVE_TIME
V12R1M505 V12R1M500* V12R1M505 V12R1M505 2016-04-20-12.38.03.706031000000
© 2017 IBM Corporation
Questions? ? ?
© 2017 IBM Corporation
Summary
© 2017 IBM Corporation52
Summary
Starting with DB2 12 New Function will ship in the maintenance stream (ML)
Enabling new function is controlled by use of
Catmaint (CL)
-ACTIVATE FUNCTION LEVEL (FL)
APPLCOMPAT (APPLV)
APPLCOMPAT is extended to apply to DDL, DCL, and to control IBM Data Server Driver
Packages (ODBC, JDBC, .Net, PHP, RUBY… SAP).
SYSLEVELUPDATES contains History on when system changes occurred
Documentation will change to help highlight new function
Working with Vendors to improve communication and early notification of changes, with access to
PTFs prior to general availability
Thank you!
© 2017 IBM Corporation
Appendix
© 2017 IBM Corporation
Documentation
© 2017 IBM Corporation56
Function Level Information: Table of Contents
Info about the DB2 12 product at
GA (traditional “What’s New”
information)
Info about the DB2 12 function
levels (shipped by continuous
delivery)
Topics about the available function
levels and their enhancements, with
the most recent function level on
top
Conceptual information about
continuous delivery and instructions
for activating new capabilities
© 2017 IBM Corporation57
“Available DB2 function levels” topic
Tip: Bookmark this topic
because it will be updated
every time a new DB2
function level is shipped!
This topic has links to
topics about each new
function level, with the
most recent on top.
The paragraph under
the link summarizes
what is included in the
function level
© 2017 IBM Corporation58
Info about Individual Function Levels
Title of the function level nnn topics
identifies the function level (V12R1Mnnn)
and the APAR/PTF that enables it.
The opening
paragraph
summarizes the
enhancements.
A table provides basic facts about each
function level.
Example
© 2017 IBM Corporation59
Information about Individual Function Levels (continued)
After the table of facts, you’ll find one section for each enhancement in the function level,
with a brief overview of that enhancement.
The overview will focus on Who, What, and WOW!
Each section for each enhancement
concludes with links to:• KC topics that provide more details about
the enhancement
• Other resources (white papers, webcasts,
etc.) about the enhancement
Example
© 2017 IBM Corporation60
Bitemporal support for DB2 Analytics Accelerator (V12R1M505)
Other topics that are
changed for a
function level contain
links back to the
overview of the
function level.
Details about Enhancements Example
© 2017 IBM Corporation
Vendor Continuous Delivery Process
© 2017 IBM Corporation62
Pre-Continuous Delivery Vendor Process
Version upgrades
Separate vendor program - early and regular vendor involvement and communication
Code drops starting over a year prior to ESP start
PFS roll-ups starting over a year prior to ESP start
Maintenance updates
Notification of APARs affecting modules or control blocks that vendors have indicated they are sensitive to
Regular sharing of documentation for design changes delivered in maintenance stream
Improved communications to answer ad-hoc queries and aid resolution of high impact problems
© 2017 IBM Corporation63
Vendor Continuous Delivery Support Summary
Overriding aim is ensure stability of DB2 for z/OS environments
Exploitation is desirable, but secondary concern
Help achieve this through
Improved, earlier, communication of changes
Early access to new maintenance
More consistent and timely update of serviceability information
Periodic longer-view updates
Ongoing use of improved communication channels between vendors and IBM development
In spite of these efforts, Continuous Delivery places greater responsibility upon vendors to invest in
ensuring stability and preventing regression from DB2 maintenance