A fix is available
APAR status
Closed as new function.
Error description
Support for Asynchronous duplexing of CF lock structure.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All DB2 V12 users of IRLM2.3 (HIR2230) in * * data sharing SYSPLEXDS. * **************************************************************** * PROBLEM DESCRIPTION: New function : Support for asynchronous * * duplexing of CF lock structure for * * DB2 version 12. * **************************************************************** * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF * **************************************************************** A new protocol for CF Structure Duplexing of lock structures called Asynchronous CF Structure Duplexing is now available on IBM z13/z13s as a Parallel Sysplex enhancement for continuous availability solution. Asynchronous duplexing use a model where the updates to the secondary structure are performed asynchronously to the updates to the primary structure. DB2 version 12 is going to use asynchronous duplexing of the CF lock structure and requires IRLM support to exploit asynchronous duplexing protocol.
Problem conclusion
Temporary fix
Comments
This APAR provides IRLM support to use asynchronous duplexing of the CF lock structure with DB2 version 12 with PTF for PI66689. Currently, only DB2 version 12 will be exploiting this functionality via IRLM support. All earlier releases of DB2 and IMS using IRLM 2.3, are not going to support asynchronous duplexing of the CF lock structure. Asynchronous duplexing makes duplexing CF lock structures more practical, even at extended distances and provides performance advantages for duplexing the lock structures. APAR PI68378 increments function level in IRLM. A new function level 40 has been set. DB2 version 12 will require the PTFs for this APAR to connect to IRLM. If PTFs for APAR PI68378 are not available, DB2 version 12 cannot IDENTIFY to IRLM and it will fail to start. Asynchronous duplexing of the lock structure is turned OFF by default. That means, users installing the PTFs for PI68378 will need to configure the environment to setup asynchronous duplexing. It requires changing CFRM policy to add DUPLEX 'mode' option along with the lock structure duplexing enabled/allowed option. e.g. DUPLEX(ENABLED,ASYNC|ASYNCONLY) or DUPLEX(ALLOWED,ASYNC|ASYNCONLY) Please refer to XES APAR OA47796 for details on configuring the asynchronous duplexing environment. For DB2 version 12 when support for asynchronous duplexing is available, IRLM connection request to the data sharing group will turn on asynchronous duplexing of the lock structure. The lock structure will remain in asynchronous duplexing as long as all connections to it are enabled for asynchronous duplexing. If a lower version of DB2(version 11) member attempts to join the data sharing group that was using asynchronous duplexing of the lock structure, asynchronous duplexing will be stopped by MVS to allow this member to connect to the lock structure. When all DB2 version 11 members leave the data sharing group while all remaining members do support the asynchronous duplexing, disconnect of the last DB2 version 11 member will trigger switch-over back to asynchronous duplexing of the lock structure.
APAR Information
APAR number
PI68378
Reported component name
IRLM V2
Reported component ID
569516401
Reported release
230
Status
CLOSED UR1
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-08-30
Closed date
2016-10-19
Last modified date
2016-11-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI41841
Modules/Macros
DXRRL010 DXRRL109 DXRRL120 DXRRL130 DXRRL2C0 DXRRL2R0 DXRRL2R1 DXRRL2R2 DXRRL2R3 DXRRL2R4 DXRRL2T0 DXRRL2T1 DXRRL210 DXRRL220 DXRRL7C0 DXRRL7C1 DXRRL7C2 DXRRL710 DXRRL711 DXRRL712 DXRRL752 DXRRL753 DXRRL760 DXRRL770 DXRRL780 DXRRL790
Fix information
Fixed component name
IRLM V2
Fixed component ID
569516401
Applicable component levels
R230 PSY UI41841
UP16/10/28 P F610
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
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Document Information
Modified date:
02 November 2016