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IDMSPLEX

IDMSPLEX. Paris 24 juin 2003. Implementing and Monitoring Shared Cache in a SysPlex Environment. Philippe Jacqmin (Formula OpenSoft) Jan Rabaut (Schlumberger). ABSTRACT. Shared Cache exploitation can eliminate ‘stale data’ reads and redundant I/O

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IDMSPLEX

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  1. IDMSPLEX Paris 24 juin 2003 www.formulaopensoft.com 1

  2. Implementing and Monitoring Shared Cachein a SysPlex Environment Philippe Jacqmin (Formula OpenSoft) Jan Rabaut (Schlumberger) www.formulaopensoft.com 2

  3. ABSTRACT • Shared Cache exploitation can eliminate • ‘stale data’ reads and • redundant I/O across multiple IDMS central versions. • This session will present information as to when shared cache is appropriate, how to implement, how to monitor and what to watch for. • This presentation is based upon the presenter’s recent implementation of shared cache exploitation. www.formulaopensoft.com 3

  4. Agenda • What is Shared Cache ? • Why use Shared Cache ? • DEXIA IDMS Transaction Servers • Which Central versions and Databases ? www.formulaopensoft.com 4

  5. Agenda • How to implement Shared Cache ? • Operating system commands • IDMS commands • How to monitor Shared Cache ? • Statistics • Implementation • Planning • Real Life • Conclusions www.formulaopensoft.com 5

  6. What is Shared Cache ? • An External in-memory repository of data available to multiple Central Versions across multiple LPARs via high speed fiber optics. • Exploits Parallel Sysplex Coupling Facility (XCF) • Using CA-IDMS rel 15 www.formulaopensoft.com 6

  7. Why use Shared Cache ? • Eliminate ‘phantom’ broken chains and outdated data Local buffers *pages* are invalidated when corresponding Cache Buffer page is modified • Eliminate redundant I/O Ideally any page is read only once, without regard to the number of Servers accessing the data • High Availability www.formulaopensoft.com 7

  8. ENV Base Runtime ENV Base Runtime SECDD SECDD SECDD SECDD SYSUSER SYSUSER DDLSEC DDLSEC SYSUSER SYSUSER DDLSEC DDLSEC DCCAT DCCAT DCCATL DCCATL DCCATX DCCATX DCMSG DCMSG DCCAT DCCAT DCCATL DCCATL DCCATX DCCATX DCMSG DCMSG DDLCAT DDLCATLOD DDLCATX DDLCAT DDLCATLOD DDLCATX DDLDCMSG DDLDCMSG CATSYS CATSYS SYSMSG SYSMSG DDLCAT DDLCATLOD DDLCATX DDLCAT DDLCATLOD DDLCATX DDLDCMSG DDLDCMSG CATSYS CATSYS SYSMSG SYSMSG DCDML DCDML DCLOD DCLOD DCLOG DCLOG DCRUN DCRUN USERDB DCDML DCDML DCLOD DCLOD DCLOG DCLOG DCRUN DCRUN DDLDML DDLDCLOD DDLDCLOG DDLDCRUN DDLDML DDLDCLOD DDLDCLOG DDLDCRUN DDLDML DDLDCLOD DDLDCLOG DDLDCRUN DDLDML DDLDCLOD DDLDCLOG DDLDCRUN USERDB SYSTEM SYSTEM SYSTEM SYSTEM USERDB USERDB USERDB USERDB DCDML DCDML DCLOD DCLOD USERDB DCDML DCDML DCLOD DCLOD USERDB SYSDIRL SYSDIRL SYSDIRL SYSDIRL DDLDML DDLDCLOD DDLDML DDLDCLOD USERDB DDLDML DDLDCLOD DDLDML DDLDCLOD USERDB DCDML DCDML DCLOD DCLOD DCDML DCDML DCLOD DCLOD APPLDICT APPLDICT APPLDICT APPLDICT DDLDML DDLDCLOD DDLDML DDLDCLOD DEXIA TRANSACTION SERVERS www.formulaopensoft.com 8

  9. Which Central Versions and Databases ? • Inter CV / Inter environments • Base central version • Dictionaries • Message area • Runtime central versions • Update cv : IDMSP • Retrieval cv: others www.formulaopensoft.com 9

  10. TST Environment V15 IDMSO V20 IDMST dictdb dloddb dcmsg DB DB www.formulaopensoft.com 10

  11. V15 IDMSO V20 IDMST dictdb dloddb dcmsg DB DB TST Environment XCF www.formulaopensoft.com 11

  12. dictdb dictdb dictdb DB DB DB GTU Environment V03 IDMSC V21 IDMSU V22 IDMSV www.formulaopensoft.com 12

  13. V03 IDMSC V21 IDMSU V22 IDMSV XCF XCF dictdb dloddb dcmsg DB DB DB GTU Environment www.formulaopensoft.com 13

  14. Data Entry Arbitrage File TRF Clients Kredieten Clients Clients Batch Base RSTU V18 IDMSR V06 IDMSF V04 IDMSD V05 IDMSE V09 IDMSI V16 IDMSP V10 IDMSJ V11 IDMSK V14 IDMSN DB DB DB DB DB DB DB dict dict dict dict dict dict dict dict dict PRD Environments www.formulaopensoft.com 14

  15. Data entry Arbitrage File trf Clients Kredieten Clients Clients batch Base RSTU V18 IDMSR V06 IDMSF V04 IDMSD V05 IDMSE V09 IDMSI V16 IDMSP V10 IDMSJ V11 IDMSK V14 IDMSN XCF XCF XCF DB DB DB DB DB DB DB dict PRD Environments www.formulaopensoft.com 15

  16. How to Implement Shared Cache ? • CF Structures (z/OS) • CF List Structure • CF Lock Structure • CF Cache Structure • IDMS • Specifying Group membership • Shared Area Requirements • Enabling Datasharing www.formulaopensoft.com 16

  17. CF Structures • CF List Structure • Structure name and shared files • CAIDMSgroupnameLI (CAIDMSDBDCPRD1LI) • Size = 2048 K • The size may be altered at any time using an OS command • Rebuilding the structure list -> R15 SP3 www.formulaopensoft.com 17

  18. CF Structures • CF Lock Structure • Contains • Lock Table • Record data entries (exclusive locks) • CAIDMSgroupnameLK (CAIDMSDBDCPRD1LK) • Size determined by • Lock entries (dmcl) • Members (dmcl) default 7 • Minimum 1M • Size = 8192 K www.formulaopensoft.com 18

  19. CF Structures • CF Cache Structure • At least one cache structure is needed • Dictionaries • User data • Associate each affected IDMS file with a Cache Structure (IDMSCACHEPRD1) • Size = 81920 k • Multiple files can share a single cache • Or allocate a cache for each file • Performance considerations similar to IDMS buffers www.formulaopensoft.com 19

  20. IDMS definitions • Specifying Group Membership • In SYSIDMS file: • DSGROUP = DBDCPRD1 • DCNAME = SYST0016 • Shared Area Requirements • Area/file definitions must match • Dataset names and volsers must match and unique • No overlapping page ranges across shared areas • No native vsam files www.formulaopensoft.com 20

  21. IDMS definitions • Enabling Data Sharing • Data sharing attributes (DMCL Level) ALTER DMCL GLBLDMCP DEFAULT BUFFER DEFAULT-BUFFER DBTABLE IDMSDBTP DATA SHARING DEFAULT SHARED CACHE IDMSCACHEPRD1 LOCK ENTRIES 65536 MEMBERS 7 ON CONNECTIVITY LOSS ABEND www.formulaopensoft.com 21

  22. IDMS definitions • Specified at the segment INCLUDE SEGMENT ESPPSGC1 DATA SHARING YES DEFAULT SHARED CACHE IDMSCACHEPRD1 • Specified at file level INCLUDE FILE ESPPSGC1.FI-ESPPFFT1 BUFFER BUFFER-A7548 SHARED CACHE DEFAULT www.formulaopensoft.com 22

  23. IDMS STARTUP MESSAGES • Requesting lockstructure • Requesting liststructure • Connecting the cache structure • Interaction with other CV’s www.formulaopensoft.com 23

  24. IDMS STARTUP MESSAGES +SYSIDMS parms --> ECHO=ON +SYSIDMS parms --> -- IDMSP DATA SHARING PARAMETERS +SYSIDMS parms --> DSGROUP=DBDCPRD1 +SYSIDMS parms --> DCNAME=SYST0016 +IDMS DC390009 V16 STARTING IDMS-CV/DC INITIALIZATION +IDMS DC391511 V16 Lock Manager for Warmstart initialization complete +IDMS DC202001 V16 Starting WARMSTART +DC215999 IXCJOIN RC=0000 Reason=0000 Name=DBDCPRD1 +DC215999 IXLCONN RC=0000 Reason=0000 Name=CAIDMSDBDCPRD1LK IXL014I IXLCONN REQUEST FOR STRUCTURE CAIDMSDBDCPRD1LK 895 WAS SUCCESSFUL. JOBNAME: IDMSP ASID: 0046 CONNECTOR NAME: SYST0016 CFNAME: CFOM +DC215999 IXLCONN RC=0000 Reason=0000 Name=CAIDMSDBDCPRD1LI IXL014I IXLCONN REQUEST FOR STRUCTURE CAIDMSDBDCPRD1LI 909 WAS SUCCESSFUL. JOBNAME: IDMSP ASID: 0046 CONNECTOR NAME: SYST0016 CFNAME: CFOM +IDMS DC202004 V16 WARMSTART bypassed - IDMS Inactive www.formulaopensoft.com 24

  25. IDMS STARTUP MESSAGES +IDMS DC217001 V16 T12 DSGroup DBDCPRD1 initialization completed +DC215999 IXLCONN RC=0000 Reason=0000 Name=IDMSCACHEPRD1 IXL014I IXLCONN REQUEST FOR STRUCTURE IDMSCACHEPRD1 824 WAS SUCCESSFUL. JOBNAME: IDMSP ASID: 0046 CONNECTOR NAME: IXCLO0DF0002 CFNAME: CFOM +IDMS DB347042 V16 T1092 VALIDATE Upd okay for AREA --> RKSISGC2.AR-RKSIVKR +IDMS DB347043 V16 T1092 VALIDATE says I-CV-I On for AREA --> RKSISGC2.AR-RKSIVK +IDMS DB347044 V16 T1092 SYSPLEX message sent to --> SYST0011 +IDMS DB347044 V16 T1092 SYSPLEX message sent to --> SYST0010 +IDMS DB347044 V16 T1092 SYSPLEX message sent to --> SYST0014 +IDMS DB347044 V16 T1092 SYSPLEX message sent to --> SYST0008 +IDMS DC200084 V16 T1092 RKSISGC2.AR-RKSIVKR Area Varied Update www.formulaopensoft.com 25

  26. Monitoring shared cache • DCMT Commands • LSTSHARE • PMDC • Broadcasting Commands • PERFMON www.formulaopensoft.com 26

  27. DCMT COMMANDS • DCMT DIS AREA • DCMT DIS DATA SHARING • DCMT DIS SHARED CACHE • DCMT DIS LOCK STATISTICS • Vary DATa SHAring DEFault CAche cache-name • Vary DATa SHAring ON CONnectivity LOSs ABEnd/NOAbend www.formulaopensoft.com 27

  28. DCMT COMMANDS • DCMT DISPLAY AREA • Sharability state of the area • Whether or not there is Inter-CV Interest V16 ENTER NEXT TASK CODE(PRD/IDMSP): DCMT DIS AREA ESPPSGC2.AR-PICXXXX ---------- Area ----------- Lock Lo-Page Hi-Page #Ret #Upd #Tret #Ntfy ESPPSGC2.AR-PICXXXX Upd 8220001 9684300 0 0 0 0 Stamp: 2002-05-08-15.44.22.146571 Pgrp: 56 ShareICVI NoPerm NoShare NoICV www.formulaopensoft.com 28

  29. DCMT Commands • DCMT DISPLAY DATA SHARING • Displays information about the data sharing environment. >>- DCMT -----------------------------------------------> +- broadcast-parms -+ >--- Display DAta SHaring ---------------------------->< +- SUMmary <--¦ +- XES LIst --¦ +- XES LOck --¦ +- XCF GRoup -¦ +- ALL -------+ www.formulaopensoft.com 29

  30. DCMT DIS DATA SHARING SUM • Display summary information about the system’s data sharing group. SUMmary is the default if no option is specified *** DISPLAY DATA SHARING REQUEST *** GROUP NAME DBDCPRD1 DEFAULT CACHE IDMSCACHEPRD1 ON CONNECTIVITY LOSS ABEND GROUP MEMBER SYST0016 IS ACTIVE PRIOR CV STATE: READY CURRENT CV STATE: ACTIVE LMGRPROXY RECOVERY LOCKS 0 LMGRRESOURCE RECOV. LOCKS 0 GROUP MEMBER SYST0011 IS ACTIVE PRIOR CV STATE: READY CURRENT CV STATE: ACTIVE LMGRPROXY RECOVERY LOCKS 0 LMGRRESOURCE RECOV. LOCKS 0 GROUP MEMBER SYST0014 IS ACTIVE PRIOR CV STATE: READY CURRENT CV STATE: ACTIVE LMGRPROXY RECOVERY LOCKS 0 LMGRRESOURCE RECOV. LOCKS 0 GROUP MEMBER SYST0008 IS ACTIVE PRIOR CV STATE: READY CURRENT CV STATE: ACTIVE LMGRPROXY RECOVERY LOCKS 0 LMGRRESOURCE RECOV. LOCKS 0 GROUP MEMBER SYST0010 IS ACTIVE PRIOR CV STATE: READY CURRENT CV STATE: ACTIVE LMGRPROXY RECOVERY LOCKS 0 LMGRRESOURCE RECOV. LOCKS 0 www.formulaopensoft.com 30

  31. DCMT DIS DATA SHARING SUMCont’d STRUCTURE CAIDMSDBDCPRD1LI TYPE LIST ACTUAL SIZE (K) 2048 CONNECT ID 2 STRUCTURE CAIDMSDBDCPRD1LK TYPE LOCK ACTUAL SIZE (K) 8192 CONNECT ID 2 LOCK ENTRIES 65536 MAX. CONNECTIONS 7 RECORD DATA ENTRY INFORMATION: MAXIMUM NUMBER 47757 NR OF TIMES SOS 0 CURRENTLY IN USE 33 HELD BY THIS CV 33 HWM 33 FREEABLE BY THIS CV 28 www.formulaopensoft.com 31

  32. DCMT DIS DATA SHARING XES LIST • Display information about the coupling facility list structure associated with this system’s data sharing group *** DISPLAY DATA SHARING REQUEST *** STRUCTURE CAIDMSDBDCPRD1LI TYPE LIST ACTUAL SIZE (K) 2048 CONNECT ID 2 (update cv) LIST STRUCTURE STATISTICS LIST NAME * READS * WRITES * DELETES * VERSIONERR * ERRORS LIST 0 * 0 * 0 * 0 * 0 * 0 AREALIST * 253 * 216 * 0 * 0 * 0 FILELIST * 1046 * 414 * 0 * 0 * 0 QUEUELIST * 0 * 0 * 0 * 0 * 0 QUIESCELIST * 2 * 0 * 0 * 0 * 0 LIST 5 * 0 * 0 * 0 * 0 * 0 Actual size (K) 2048 Connect id 1 (retrieval cv) List structure statistics List name * Reads * Writes * Deletes * VersionErr * Errors List 0 * 0 * 0 * 0 * 0 * 0 AreaList * 537 * 408 * 0 * 4 * 0 FileList * 178 * 163 * 0 * 0 * 0 QueueList * 0 * 0 * 0 * 0 * 0 QuiesceList * 2 * 0 * 0 * 0 * 0 List 5 * 0 * 0 * 0 * 0 * 0 www.formulaopensoft.com 32

  33. DCMT DIS DATA SHARING XES LOCKCont’d • Display information about the coupling facility lock structure associated with this system’s sharing group *** DISPLAY DATA SHARING REQUEST *** (update cv) Structure CAIDMSDBDCPRD1LK type LOCK Actual size (K) 8192 Connect id 4 Lock entries 65536 Max. connections 7 Record Data Entry information: Maximum number 47757 Nr of times SOS 0 Currently in use 5269 Held by this CV 5253 HWM 19436 Freeable by this CV 4729 *** DISPLAY DATA SHARING REQUEST *** (retrieval cv) Structure CAIDMSDBDCPRD1LK type LOCK Actual size (K) 8192 Connect id 1 Lock entries 65536 Max. connections 7 Record Data Entry information: Maximum number 47757 Nr of times SOS 0 Currently in use 0 Held by this CV 0 HWM 0 Freeable by this CV 0 www.formulaopensoft.com 33

  34. DCMT DIS DATA SHARING XES LOCKCont’d Lock structure statistics (Obtain) (update cv) ResType * Obtains * Obt.Async * Obt.Syncf * Obt.Denied * Obt.Except LmgrResource * 7500639 * 90 * 0 * 0 * 0 Phys.Page * 17 * 15 * 0 * 0 * 0 GlobalDeadLk * 0 * 0 * 0 * 0 * 0 LmgrProxy * 2190670 * 11886 * 0 * 0 * 0 EnqDeq * 156 * 0 * 0 * 0 * 0 AreaList * 55 * 0 * 0 * 0 * 0 FileList * 346 * 0 * 0 * 0 * 0 GlobalQueue * 0 * 0 * 0 * 0 * 0 QuiesceList * 2 * 0 * 0 * 0 * 0 Lock structure statistics (Obtain) (retrieval cv) ResType * Obtains * Obt.Async * Obt.Syncf * Obt.Denied * Obt.Except LmgrResource * 10349477 * 36014 * 0 * 0 * 0 Phys.Page * 6 * 1 * 0 * 0 * 0 GlobalDeadLk * 0 * 0 * 0 * 0 * 0 LmgrProxy * 16974022 * 430607 * 0 * 0 * 0 EnqDeq * 308 * 107 * 0 * 0 * 0 AreaList * 1 * 0 * 0 * 0 * 0 FileList * 51 * 3 * 0 * 0 * 0 GlobalQueue * 0 * 0 * 0 * 0 * 0 QuiesceList * 2 * 0 * 0 * 0 * 0 www.formulaopensoft.com 34

  35. DCMT DIS DATA SHARING XCF GROUP • Display information about the members of these system’s data sharing group and messages that have been sent between those members *** Display Data Sharing request *** Group name DBDCPRD1 Default Cache IDMSCACHEPRD1 On Connectivity Loss ABEND Group member SYST0011 is Active Prior CV state: Ready Current CV state: Active LmgrProxy recovery locks 0 LmgrResource recov. locks 0 XCF Message statistics: MessageType * Sends * SendErrors * Receives * RecvPurged * RecvErrors Reply * 0 * 0 * 0 * 0 * 0 TestMsg * 0 * 0 * 0 * 0 * 0 SyncStamp * 0 * 0 * 0 * 0 * 0 GlobalDeadLk * 0 * 0 * 0 * 0 * 0 DCMTDCUFSEND * 0 * 0 * 0 * 0 * 0 AreaFileVal * 0 * 0 * 0 * 0 * 0 QueueMsg * 0 * 0 * 0 * 0 * 0 ProgramMsg * 0 * 0 * 0 * 0 * 0 QuiesceMsg * 0 * 0 * 0 * 0 * 0 www.formulaopensoft.com 35

  36. DCMT DIS DATA SHARING XCF GROUPCont’d Group member SYST0010 is Active Prior CV state: Ready Current CV state: Active LmgrProxy recovery locks 0 LmgrResource recov. locks 0 XCF Message statistics: MessageType * Sends * SendErrors * Receives * RecvPurged * RecvErrors Reply * 0 * 0 * 0 * 0 * 0 TestMsg * 0 * 0 * 0 * 0 * 0 SyncStamp * 0 * 0 * 0 * 0 * 0 GlobalDeadLk * 0 * 0 * 0 * 0 * 0 DCMTDCUFSEND * 0 * 0 * 0 * 0 * 0 AreaFileVal * 0 * 0 * 0 * 0 * 0 QueueMsg * 0 * 0 * 0 * 0 * 0 ProgramMsg * 0 * 0 * 0 * 0 * 0 QuiesceMsg * 0 * 0 * 0 * 0 * 0 Group member SYST0014 is Active Prior CV state: Ready Current CV state: Active LmgrProxy recovery locks 0 LmgrResource recov. locks 0 XCF Message statistics: Reply * 0 * 0 * 0 * 0 * 0 TestMsg * 0 * 0 * 0 * 0 * 0 SyncStamp * 0 * 0 * 0 * 0 * 0 GlobalDeadLk * 0 * 0 * 0 * 0 * 0 DCMTDCUFSEND * 0 * 0 * 0 * 0 * 0 AreaFileVal * 0 * 0 * 0 * 0 * 0 QueueMsg * 0 * 0 * 0 * 0 * 0 ProgramMsg * 0 * 0 * 0 * 0 * 0 QuiesceMsg * 0 * 0 * 0 * 0 * 0 www.formulaopensoft.com 36

  37. DCMT DIS SHARED CACHE • Displays information about the coupling facility cache structure *** Display SHAred CAche request *** Cache name: IDMSCACHEPRD1 Actual size (K): 81920 Status : ON Reads: 66484 Writes: 11547 File RK.IDMP.RKSIVKR1 on IDMP51 File RK.IDMP.RKSIVKR2 on IDMP51 File RK.IDMP.RKSIVKR3 on IDMP52 File RK.IDMP.RKSIVKR4 on IDMP52 File RK.IDMP.RKSIVKR5 on IDMP53 File RK.IDMP.RKSIVKR6 on IDMP53 File RK.IDMP.RKSIVKR7 on IDMP54 File RK.IDMP.RKSIWRK1 on IDMP54 File RK.IDMP.RKSISKR1 on IDMP48 File RK.IDMP.RKSISKR2 on IDMP49 File RK.IDMP.RKSISKR3 on IDMP49 File RK.IDMP.RKSIPRD1 on IDMP48 File RK.IDMP.RKSIMKR1 on IDMP38 File RK.IDMP.RKSIMIC1 on IDMP38 www.formulaopensoft.com 37

  38. DCMT DIS LOCK STATISTICS • Information about local and global locks • The ratio of global resource lock requests to local lock requests is a measure of contention for resources between members • No contention = small ratio • The ratio of the number of waits to the number of global requests is also a measure of contention. www.formulaopensoft.com 38

  39. DCMT DIS LOCK STATISTICSCont’d DCMT DISPLAY LOCK STATS *** Transaction Lock Statistics *** Local Trans Local Page Global Proxy Global Resource Lock Requests 40065499 4191977 2479022 7514843 Locks Held 56 859 19995 18 Rec Data Held 5253 0 Waits 0 34400 102 Locks Denied 12 0 0 New Contentions 2106 3 Contention Xit 4243 7 Notify Xit 1503 1 Downgrades 27 0 Releases 1467 0 Upgrade Posts 9 www.formulaopensoft.com 39

  40. DCMT DIS LOCK STATISTICSCont’d - - - - Notify/Longterm Stats - - - - Notify Longterm Share Longterm Update Acquired 13185221 0 0 Held 0 0 0 Global DBMS Activity Notifications Out In Dbkey 0 0 Area 0 0 - - - - - Proxy Management - - - - - Created Freed Reused Stolen 20003 1470 2654763 2169628 www.formulaopensoft.com 40

  41. DCMT DIS LOCK STATISTICSCont’d - - - - - Storage Management - - - - - SYSLOCKs value: 40000 # Times Ovfl # Ovfl Getstg Curr Ovfl Size Ovfl Size HWM Overall: 1 46 3456 52992 Session: 0 0 0 0 Class: 0 0 0 0 Resource: 1 46 3456 52992 XES Reqs: 0 0 0 0 Proxy: 0 0 0 0 - - - - - - Miscellaneous - - - - - - Upgrade Reqs: 8009909 In Place: 4698887 Denied: 1 Cleanup Calls: 9 Compression Calls: 391 www.formulaopensoft.com 41

  42. LSTSHARE • In house made utility • Overview of shared areas • Inter Cv Interest notification S.... Area can be Shared by multiple CV .I... Inter-CV-Interest in area ( 1 upd/1 upd or 1upd/1ret) ..D.. Defined as shared (via DMCL) (via DCMT?) ...G. Global locks should be downGraded ....Q area Quiesced www.formulaopensoft.com 42

  43. LSTSHARE V16 ENTER NEXT TASK CODE(PRD/IDMSP): lstshare sh Segment Areaname Filename Pg LowPage #Pages Psize Asiz S T Shared -------- ------------------ -------- -- -------- -------- ----- ---- - - Cache ESPPSGC1.AR-ESPPFFT SYS00239 56 9970001 20055 7548 151M U I SID.. ESPPSGC2.AR-PDOCEVT SYS00235 56 1211211 5040 7548 38M U I SID.. ESPPSGC2.AR-PICOTHX SYS00226 56 1220241 45675 7548 344M U I SID.. ESPPSGC2.AR-PICFUNK SYS00230 56 5053201 40950 7548 309M U I SID.. ESPPSGC2.AR-PESIEVT SYS00233 56 5680501 123900 7548 1.8G U I SID.. ESPPSGC2.AR-PESIEVT SYS00234 56 5804401 123900 7548 1.8G U I SID.. ESPPSGC2.AR-PPWD1XX SYS00213 56 7234201 8400 7548 63M U I SID.. ESPPSGC2.AR-PICPIEV SYS00223 56 7757521 189000 7548 1.4G U I SID.. ESPPSGC2.AR-PPNAMEX SYS00216 56 8105001 15330 7548 115M U I SID.. ESPPSGC2.AR-PPPHONX SYS00215 56 8120331 10080 7548 76M U I SID.. ESPPSGC2.AR-PPTWDXX SYS00214 56 8145801 105 7548 792K U I SID.. ESPPSGC2.AR-PICO2IX SYS00224 56 8146501 105 7548 792K U I SID.. ESPPSGC2.AR-PICPONA SYS00222 56 8158316 6720 6516 43M U I SID.. ESPPSGC2.AR-PICCOMM SYS00231 56 8166001 3675 7548 27M U I SID.. ESPPSGC2.AR-PICNTVA SYS00227 56 8170001 5565 7548 42M U I SID.. PAGE 001 - NEXT PAGE: www.formulaopensoft.com 43

  44. VARY DATA SHARING • Enabling data sharing for an area The change will be made only if the area status is OFFLINE • Enabling data sharing for a file The file must be deallocated • Changing the shared cache for a file Specifies the name or status of shared cache for all files associated with the named area. • Changing the default shared cache for a system that is member of a data sharing group www.formulaopensoft.com 44

  45. DCMT VARY DATA SHARING >>-- DCMT Vary --- DAta SHAring ---- DEFault Cache -- cache-name ------------->< +- DSG ----------++- ON CONnectivity LOSs --- ABEnd ----¦ +- NOAbend --+ www.formulaopensoft.com 45

  46. DCMT VARY DATA SHARINGCont’d • DCMT VARY AREA ESPPSGC2.AR-PICXXXX OFFLINE Segment Areaname Filename Pg LowPage #Pages Psize Asiz S T Shared -------- ------------------ -------- -- -------- -------- ----- ---- - - Cache ESPPSGC2.AR-PICXXXX SYS00010 56 1788001 42000 7548 317M O I S.DG. • DCMT VARY FILE ESPPSGC2.FI-PICXXXX1 DEALLOC • DCMT VARY AREA ESPPSGC2.AR-PICXXXX DATA SHARING OFF Segment Areaname Filename Pg LowPage #Pages Psize Asiz S T Shared -------- ------------------ -------- -- -------- -------- ----- ---- - - Cache ESPPSGC2.AR-PICXXXX SYS00010 56 1788001 42000 7548 317M O I ..DG. • DCMT VARY AREA ESPPSGC2.AR-PICXXXX SHARED CACHE NO • DCMT VARY FILE ESPPSGC2.FI-PICXXXX1 ALLOC • DCMT VARY AREA ESPPSGC2.AR-PICXXXX RET ---------- Area ----------- Lock Lo-Page Hi-Page #Ret #Upd #Tret #Ntfy ESPPSGC2.AR-PICXXXX Ret 1788001 1830000 0 0 0 0 Stamp: 2001-10-22-16.42.02.737471 Pgrp: 56 NoShare NoICVI NoPerm www.formulaopensoft.com 46

  47. PMDC CACHE ACTIVITY <?123456789> MT=0 SS=0 AT=24 (L1 -2 - C 1-66 ) SELECT CACHE ====> SCROLL ==> CSR # CACHE------NAME READS WRITES STATUS FILES# A(CACHE) 1 IDMSCACHEPRD1 1207643 795751 ON 111 2345D258 *** *************** ******** ******** ******** ******** ******** CACHE ACTIVITY <?123456789> MT=0 SS=0 AT=22 (L1 -2 - C 1-66 ) SELECT CACHE ====> SCROLL ==> CSR # CACHE------NAME READS WRITES STATUS FILES# A(CACHE) 1 IDMSCACHEPRD1 63368443 7750279 ON 53 21CB6938 *** *************** ******** ******** ******** ******** ******** CACHE ACTIVITY <?123456789> MT=0 SS=0 AT=24 (L1 -2 - C 1-66 ) SELECT CACHE ====> SCROLL ==> CSR # CACHE------NAME READS WRITES STATUS FILES# A(CACHE) 1 IDMSCACHEPRD1 47471 33616 ON 38 20C8E1B8 *** *************** ******** ******** ******** ******** ******** www.formulaopensoft.com 47

  48. BROADCASTING COMMANDS • Execute the same system task on group members • On all or a subset of group members • By issuing a single request • Supported for • All DCMT commands (except shutdown,vary dmcl,vary/display nucleus) • DCUF SHOW USER • SEND www.formulaopensoft.com 48

  49. BROADCASTING COMMANDS • Syntax >>---- DCMT ----------------------------------------------- ... ------ +- DCUF -¦ +- Broadcast --- member-name -------------¦ +- SEND -+ ¦ +-- , ----------+ ¦ +- ( -V- member-name --- ) -+ • Example V16 ENTER NEXT TASK CODE(PRD/IDMSP): DCMT BROADCAST DISPLAY AREA ESPPSGC2.AR-PICXXXX www.formulaopensoft.com 49

  50. BROADCASTING COMMANDS BROADCAST DISPLAY AREA ESPPSGC2.AR-PICXXXX ---------- Area ----------- Lock Lo-Page Hi-Page #Ret #Upd #Tret #Ntfy ESPPSGC2.AR-PICXXXX Upd 8220001 9684300 0 0 0 0 Stamp: 2002-05-08-15.44.22.146571 Pgrp: 56 Share ICVI NoPerm ===> Output from group member SYST0011 ---------- Area ----------- Lock Lo-Page Hi-Page #Ret #Upd #Tret #Ntfy ESPPSGC2.AR-PICXXXX Ret 8220001 9684300 0 0 0 0 Stamp: 2002-05-08-15.44.22.146571 Pgrp: 56 Share ICVI NoPerm ===> Output from group member SYST0010 ---------- Area ----------- Lock Lo-Page Hi-Page #Ret #Upd #Tret #Ntfy ESPPSGC2.AR-PICXXXX Ret 8220001 9684300 0 0 0 0 Stamp: 2002-05-08-15.44.22.146571 Pgrp: 56 Share ICVI NoPerm ===> Output from group member SYST0008 ---------- Area ----------- Lock Lo-Page Hi-Page #Ret #Upd #Tret #Ntfy ESPPSGC2.AR-PICXXXX Ret 8220001 9684300 0 0 0 0 Stamp: 2002-05-08-15.44.22.146571 Pgrp: 56 Share ICVI NoPerm ===> Output from group member SYST0014 ---------- Area ----------- Lock Lo-Page Hi-Page #Ret #Upd #Tret #Ntfy ESPPSGC2.AR-PICXXXX Ret 8220001 9684300 0 0 0 0 Stamp: 2002-05-08-15.44.22.146571 Pgrp: 56 Share ICVI NoPerm www.formulaopensoft.com 50

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