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Transcript of IDMSPLEX Paris 24 juin 2003.
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IDMSPLEXIDMSPLEX
Paris 24 juin 2003
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Implementing and Implementing and
Monitoring Shared CacheMonitoring Shared Cache
in a SysPlex Environmentin a SysPlex Environment
Philippe Jacqmin (Formula OpenSoft)
Jan Rabaut (Schlumberger)
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ABSTRACTABSTRACT 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.
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AgendaAgendaWhat is Shared Cache ?Why use Shared Cache ?DEXIA IDMS Transaction ServersWhich Central versions and
Databases ?
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AgendaAgenda How to implement Shared Cache ?
– Operating system commands– IDMS commands
How to monitor Shared Cache ? Statistics Implementation
– Planning– Real Life
Conclusions
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What is Shared Cache ?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
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Why use Shared Cache ?Why use Shared Cache ? Eliminate ‘phantom’ broken chains and
outdated dataLocal buffers *pages* are invalidated when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
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DEXIA DEXIA TRANSACTION SERVERSTRANSACTION SERVERS
P Z
T V26
P CPUAMFR2
T Y S
G V25 V19
T CPUC CPUFMFR5 MFR1
U Q A B
A V17 V01 V02
T CPUD CPUD CPUFMFR4 MFR4 MFR1
P R F D E I J K N P
R V18 V4 V6 V5 V8 V10 V11 V14 V16
D CPUC CPUP CPUP CPUP CPUP CPUB CPUP CPUP
MFR5 MFR2 MFR2 MFR2 MFR2 MFR1 MFR2 MFR2
G C U V
T V3 V21 V22
U CPUC CPUD CPUFMFR5 MFR4 MFR1
DDLDMLDDLDCLOD
DDLSEC
DDLCATDDLCATLOD
DDLCATX
SYSUSER
SYSDIRL
DCCATLDCCAT DCCATX
SECDD
DCDML DCLOG DCRUNSYSTEM
CATSYS
DCLOD
DCDML DCLOD
SYSMSG DCMSG
DDLDMLDDLDCLODDDLDCLOGDDLDCRUN
DDLDMLDDLDCLOD
DDLDCMSG
APPLDICT DCDML DCLOD
DDLSEC
DDLCATDDLCATLOD
DDLCATX
SYSUSER
SYSDIRL
DCCATLDCCAT DCCATX
SECDD
DCDML DCLOG DCRUNSYSTEM
CATSYS
DCLOD
DCDML DCLOD
SYSMSG DCMSG
DDLDMLDDLDCLODDDLDCLOGDDLDCRUN
DDLDMLDDLDCLOD
DDLDCMSG
APPLDICT DCDML DCLOD
ENV Base Runtime
DDLSEC
DDLCATDDLCATLOD
DDLCATX
SYSUSER
SYSDIRL
DCCATLDCCAT DCCATX
SECDD
DCDML DCLOG DCRUNSYSTEM
CATSYS
DCLOD
DCDML DCLOD
SYSMSG DCMSG
DDLDMLDDLDCLODDDLDCLOGDDLDCRUN
DDLDMLDDLDCLOD
DDLDCMSG
APPLDICT DCDML DCLOD DDLDMLDDLDCLOD
DDLSEC
DDLCATDDLCATLOD
DDLCATX
SYSUSER
SYSDIRL
DCCATLDCCAT DCCATX
SECDD
DCDML DCLOG DCRUNSYSTEM
CATSYS
DCLOD
DCDML DCLOD
SYSMSG DCMSG
DDLDMLDDLDCLODDDLDCLOGDDLDCRUN
DDLDMLDDLDCLOD
DDLDCMSG
APPLDICT DCDML DCLOD
USERDBUSERDB
USERDBUSERDB
USERDBUSERDB
USERDBUSERDB
USERDBUSERDB
ENV Base RuntimeENV Base Runtime
T O T
S V15 V20
T CPUC CPUCMFR5 MFR5
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Which Central Versions and Which Central Versions and Databases ?Databases ?
Inter CV / Inter environments Base central version
– Dictionaries– Message area
Runtime central versions– Update cv : IDMSP– Retrieval cv: others
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TST EnvironmentTST Environment
V15
IDMSO
dictdb
V20IDMST
dloddb dcmsgDB
DB
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TST EnvironmentTST Environment
V15
IDMSO
dictdb
V20IDMST
dloddb dcmsgDB
DB
XCF
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GTU EnvironmentGTU Environment
V03
IDMSCV22
IDMSVV21
IDMSU
DB DB DBdictdb dictdb dictdb
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GTU EnvironmentGTU Environment
V03
IDMSCV22
IDMSVV21
IDMSU
DB DB DBdcmsgdloddbdictdb
XCFXCF
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PRD EnvironmentsPRD Environments
dict dict dict dict dict dict dict
V04IDMSD
V05IDMSE
V09IDMSI
DBDBDB
Data Entry Arbitrage File TRF
V16IDMSP
DB
Clients
V10IDMSJ
V11IDMSK
V14IDMSN
DB DBDB
Kredieten Clients BatchClients
V18IDMSR
dict
Base
V06IDMSF
dict
RSTU
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PRD EnvironmentsPRD Environments
XCF XCF XCF
V04IDMSD
V05IDMSE
V09IDMSI
DBDBDB
Data entry Arbitrage File trf
V16IDMSP
DB
Clients
V10IDMSJ
V11IDMSK
V14IDMSN
DB DBDB
Kredieten Clients batchClients
V18IDMSR
dict
Base
V06IDMSF
RSTU
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How to Implement Shared How to Implement Shared Cache ?Cache ?
CF Structures (z/OS)– CF List Structure– CF Lock Structure– CF Cache Structure
IDMS – Specifying Group membership– Shared Area Requirements– Enabling Datasharing
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CF StructuresCF StructuresCF 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
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CF StructuresCF StructuresCF 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
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CF StructuresCF StructuresCF 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
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IDMS definitionsIDMS 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
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IDMS definitionsIDMS definitionsEnabling 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
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IDMS definitionsIDMS definitions Specified at the segment
INCLUDE SEGMENT ESPPSGC1
DATA SHARING YES
DEFAULT SHARED CACHE IDMSCACHEPRD1
Specified at file levelINCLUDE FILE ESPPSGC1.FI-ESPPFFT1
BUFFER BUFFER-A7548
SHARED CACHE DEFAULT
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IDMS STARTUP IDMS STARTUP MESSAGESMESSAGES
Requesting lockstructure
Requesting liststructure
Connecting the cache structure
Interaction with other CV’s
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IDMS STARTUP IDMS STARTUP MESSAGES 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=CAIDMSDBDCPRD1LKIXL014I IXLCONN REQUEST FOR STRUCTURE CAIDMSDBDCPRD1LK 895 WAS SUCCESSFUL. JOBNAME: IDMSP ASID: 0046 CONNECTOR NAME: SYST0016 CFNAME: CFOM +DC215999 IXLCONN RC=0000 Reason=0000 Name=CAIDMSDBDCPRD1LIIXL014I IXLCONN REQUEST FOR STRUCTURE CAIDMSDBDCPRD1LI 909 WAS SUCCESSFUL. JOBNAME: IDMSP ASID: 0046 CONNECTOR NAME: SYST0016 CFNAME: CFOM +IDMS DC202004 V16 WARMSTART bypassed - IDMS Inactive
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IDMS STARTUP IDMS STARTUP MESSAGESMESSAGES
+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
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Monitoring shared cacheMonitoring shared cacheDCMT CommandsLSTSHAREPMDC Broadcasting CommandsPERFMON
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DCMT COMMANDSDCMT 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
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DCMT COMMANDSDCMT COMMANDSDCMT 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 Share ICVI NoPerm
NoShare NoICV
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DCMT CommandsDCMT CommandsDCMT DISPLAY DATA SHARING
– Displays information about the data sharing environment.
>>- DCMT ----------------------------------------------->
+- broadcast-parms -+
>--- Display DAta SHaring ----------------------------><
+- SUMmary <--¦
+- XES LIst --¦
+- XES LOck --¦
+- XCF GRoup -¦
+- ALL -------+
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DCMT DIS DATA SHARING DCMT DIS DATA SHARING SUMSUM
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 0GROUP MEMBER SYST0011 IS ACTIVE PRIOR CV STATE: READY CURRENT CV STATE: ACTIVE LMGRPROXY RECOVERY LOCKS 0 LMGRRESOURCE RECOV. LOCKS 0GROUP MEMBER SYST0014 IS ACTIVE PRIOR CV STATE: READY CURRENT CV STATE: ACTIVE LMGRPROXY RECOVERY LOCKS 0 LMGRRESOURCE RECOV. LOCKS 0GROUP MEMBER SYST0008 IS ACTIVE PRIOR CV STATE: READY CURRENT CV STATE: ACTIVE LMGRPROXY RECOVERY LOCKS 0 LMGRRESOURCE RECOV. LOCKS 0GROUP MEMBER SYST0010 IS ACTIVE PRIOR CV STATE: READY CURRENT CV STATE: ACTIVE LMGRPROXY RECOVERY LOCKS 0 LMGRRESOURCE RECOV. LOCKS 0
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DCMT DIS DATA SHARING DCMT DIS DATA SHARING SUMSUM
Cont’dCont’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
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DCMT DIS DATA SHARING DCMT DIS DATA SHARING XES LISTXES 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 * 0AREALIST * 253 * 216 * 0 * 0 * 0FILELIST * 1046 * 414 * 0 * 0 * 0QUEUELIST * 0 * 0 * 0 * 0 * 0QUIESCELIST * 2 * 0 * 0 * 0 * 0LIST 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 * 0AreaList * 537 * 408 * 0 * 4 * 0FileList * 178 * 163 * 0 * 0 * 0QueueList * 0 * 0 * 0 * 0 * 0QuiesceList * 2 * 0 * 0 * 0 * 0List 5 * 0 * 0 * 0 * 0 * 0
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DCMT DIS DATA SHARING DCMT DIS DATA SHARING XES LOCKXES LOCK
Cont’dCont’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
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DCMT DIS DATA SHARING DCMT DIS DATA SHARING XES LOCKXES LOCK
Cont’dCont’dLock structure statistics (Obtain) (update cv) ResType * Obtains * Obt.Async * Obt.Syncf * Obt.Denied * Obt.ExceptLmgrResource * 7500639 * 90 * 0 * 0 * 0Phys.Page * 17 * 15 * 0 * 0 * 0GlobalDeadLk * 0 * 0 * 0 * 0 * 0LmgrProxy * 2190670 * 11886 * 0 * 0 * 0EnqDeq * 156 * 0 * 0 * 0 * 0AreaList * 55 * 0 * 0 * 0 * 0FileList * 346 * 0 * 0 * 0 * 0GlobalQueue * 0 * 0 * 0 * 0 * 0QuiesceList * 2 * 0 * 0 * 0 * 0
Lock structure statistics (Obtain) (retrieval cv) ResType * Obtains * Obt.Async * Obt.Syncf * Obt.Denied * Obt.ExceptLmgrResource * 10349477 * 36014 * 0 * 0 * 0Phys.Page * 6 * 1 * 0 * 0 * 0GlobalDeadLk * 0 * 0 * 0 * 0 * 0LmgrProxy * 16974022 * 430607 * 0 * 0 * 0EnqDeq * 308 * 107 * 0 * 0 * 0AreaList * 1 * 0 * 0 * 0 * 0FileList * 51 * 3 * 0 * 0 * 0GlobalQueue * 0 * 0 * 0 * 0 * 0QuiesceList * 2 * 0 * 0 * 0 * 0
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DCMT DIS DATA SHARING DCMT DIS DATA SHARING XCF GROUPXCF 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 0XCF Message statistics: MessageType * Sends * SendErrors * Receives * RecvPurged * RecvErrorsReply * 0 * 0 * 0 * 0 * 0TestMsg * 0 * 0 * 0 * 0 * 0SyncStamp * 0 * 0 * 0 * 0 * 0GlobalDeadLk * 0 * 0 * 0 * 0 * 0DCMTDCUFSEND * 0 * 0 * 0 * 0 * 0AreaFileVal * 0 * 0 * 0 * 0 * 0QueueMsg * 0 * 0 * 0 * 0 * 0ProgramMsg * 0 * 0 * 0 * 0 * 0QuiesceMsg * 0 * 0 * 0 * 0 * 0
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DCMT DIS DATA SHARING DCMT DIS DATA SHARING XCF GROUPXCF GROUP
Cont’dCont’dGroup member SYST0010 is Active Prior CV state: Ready Current CV state: Active LmgrProxy recovery locks 0 LmgrResource recov. locks 0XCF Message statistics: MessageType * Sends * SendErrors * Receives * RecvPurged * RecvErrorsReply * 0 * 0 * 0 * 0 * 0TestMsg * 0 * 0 * 0 * 0 * 0SyncStamp * 0 * 0 * 0 * 0 * 0GlobalDeadLk * 0 * 0 * 0 * 0 * 0DCMTDCUFSEND * 0 * 0 * 0 * 0 * 0AreaFileVal * 0 * 0 * 0 * 0 * 0QueueMsg * 0 * 0 * 0 * 0 * 0ProgramMsg * 0 * 0 * 0 * 0 * 0QuiesceMsg * 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 0XCF Message statistics: Reply * 0 * 0 * 0 * 0 * 0TestMsg * 0 * 0 * 0 * 0 * 0SyncStamp * 0 * 0 * 0 * 0 * 0GlobalDeadLk * 0 * 0 * 0 * 0 * 0DCMTDCUFSEND * 0 * 0 * 0 * 0 * 0AreaFileVal * 0 * 0 * 0 * 0 * 0QueueMsg * 0 * 0 * 0 * 0 * 0ProgramMsg * 0 * 0 * 0 * 0 * 0QuiesceMsg * 0 * 0 * 0 * 0 * 0
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DCMT DIS SHARED CACHEDCMT 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
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DCMT DIS LOCK DCMT DIS LOCK STATISTICSSTATISTICS
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.
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DCMT DIS LOCK DCMT DIS LOCK STATISTICSSTATISTICS
Cont’dCont’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
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DCMT DIS LOCK DCMT DIS LOCK STATISTICSSTATISTICS
Cont’dCont’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
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DCMT DIS LOCK DCMT DIS LOCK STATISTICSSTATISTICS
Cont’dCont’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
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LSTSHARELSTSHARE 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
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LSTSHARELSTSHAREV16 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:
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VARY DATA SHARING 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 fileThe file must be deallocated
Changing the shared cache for a fileSpecifies 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
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DCMT VARY DATA DCMT VARY DATA SHARINGSHARING
>>-- DCMT Vary --- DAta SHAring ---- DEFault Cache -- cache-name -------------><
+- DSG ----------++- ON CONnectivity LOSs --- ABEnd ----¦
+- NOAbend --+
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DCMT VARY DATA DCMT VARY DATA SHARINGSHARING
Cont’dCont’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 #NtfyESPPSGC2.AR-PICXXXX Ret 1788001 1830000 0 0 0 0 Stamp: 2001-10-22-16.42.02.737471 Pgrp: 56 NoShare NoICVI NoPerm
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PMDCPMDCCACHE 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 *** *************** ******** ******** ******** ******** ********
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BROADCASTING BROADCASTING COMMANDSCOMMANDS
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
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BROADCASTING BROADCASTING COMMANDSCOMMANDS
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
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BROADCASTING BROADCASTING COMMANDSCOMMANDS
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 #NtfyESPPSGC2.AR-PICXXXX Ret 8220001 9684300 0 0 0 0 Stamp: 2002-05-08-15.44.22.146571 Pgrp: 56 Share ICVI NoPerm
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PERFMONPERFMON Collects and report information
associated with the data sharing group Available through the interval monitor Sysplex menu PF23
– DBGroup detail/history– Data sharing lock detail/history– Date sharing member detail/history– Shared Cache detail/history– Data sharing list detail/history
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Third party softwareThird party softwareJournal layout changedAll third party software which uses
IDMS journals must be adaptedEZ-Reorg (cogito) rel 5.4 tape
c10401PMDC
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STATISTICSSTATISTICSCPU usage + 18% Mips growth # TransactionsStorageResourcesI/O
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STATISTICS STATISTICS CPU USAGECPU USAGE
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STATISTICS STATISTICS MIPS GROWTHMIPS GROWTH
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STATISTICS STATISTICS # TRANSACTIONS# TRANSACTIONS
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STATISTICS STATISTICS I/OI/O
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Mips per month IDMSP Mips per month IDMSP 0800 to 1700 weekdays0800 to 1700 weekdays
Month Open Days
MIPS by day
% of all Periods
growth month to date
growth year to
date
% total workload
March 2002 20 42.20 80.52% 1.03 -64.81 35.79%
April 2002 21 50.70 77.96% 8.50 -58.73 31.79%
May 2002 19 66.14 75.23% 15.45 -55.24 39.46%
June 2002 20 54.06 80.78% -12.08 -90.49 35.22%
July 2002 23 53.08 83.47% -0.98 21.31 32.29%
August 2002 21 53.30 81.24% -10.56 15.19 31.70%
September 2002
21 48.18 80.24% -5.12 9.30 29.02%
October 2002 23 46.09 81.45% -2.09 -5.48 28.30%
November 2002
19 59.82 69.04% 13.73 17.10 35.94%
December 2002 20 55.46 71.35% -4.36 10.03 34.85%
January 2003 22 52.29 80.01% -3.17 5.47 35.55%
February 2003
20 55.37 78.78% 3.08 5.84 35.55%
March 2003 21 62.07 79.29% 6.71 11.31 37.89%
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Mips per month IDMSK Mips per month IDMSK 0800 to 1700 weekdays0800 to 1700 weekdays
Month Open Days
MIPS by day
% of all Periods
growth month to date
growth year to
date
% total workload
March 2002 20 36.42 57.25% 2.88 36.29 30.89%
April 2002 21 69.01 64.01% 32.59 59.71 43.27%
May 2002 19 65.81 55.41% -3.19 41.01 39.26%
June 2002 20 62.10 58.78% -3.72 31.97 40.46%
July 2002 23 74.97 63.52% 12.87 57.20 45.61%
August 2002 21 78.70 62.43% 3.73 59.84 46.81%
September 2002
21 76.18 64.05% -18.51 50.17 45.89%
October 2002 23 74.15 67.14% -2.03 48.50 45.54%
November 2002
19 67.28 59.22% -6.87 43.94 40.42%
December 2002 20 64.50 59.90% -2.77 34.55 40.54%
January 2003 22 57.53 62.58% -6.98 22.54 39.11%
February 2003
20 59.97 66.16% 2.44 19.61 38.51%
March 2003 21 59.49 67.45% -0.48 15.67 36.31%
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PLANNINGPLANNING Scope of XCF project Learning (continuing process) Prerequisites Implementation of IDMS Rel 15
– Base install 1 month– Propagation 2 months– Stabilisation 1 month
Implementation of Shared Cache technology– Base install 1 month– Propagation to all environments 2 months
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REAL LIFEREAL LIFE Scope of XCF project Learning process Implementation of IDMS Rel 15
– Base install 2 months– Propagation 3 months– Stabilisation 1,5 months
Implementation of Shared Cache– Base Install 2 months– Propagation to all environments 5 months
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FUTURE DEVELOPMENTFUTURE DEVELOPMENT Production dictionaries sharing not yet
finished Rebuild XCF (idms rel 15 sp 3) Homogeneous groups (IDMSP’/IDMSJ’) NOR, TOR and AOR technology Hot backup, Flash Copy Dynamic routing (DBGROUP)
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SysPlex Project SummarySysPlex Project Summary Progressive approach
(Read, Mread,Update/Mread,Mupdate/Mread) No more stale data Less dictionaries High Availability (24/24) Skill requirements – Tuning follow-up New approach for DBA maintenance
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Side by SideSide by SideDBMS
RDBMS
TP
APPC – LU6.2
4GL
Repository
Tuning Tool
Batch Report
Modelling Tool
Add-on Tools
Installation (SMP)
DB2
CICS
CICS
‘VisualGen’
‘Catalog’
TMON CICS/DB2
Cobol write
MEGA
BMC
MVS Group
IDMS
IDMS/SQL
IDMS/DC
IDMS/DC
IDMS/ADS
IDMS/IDD
IDMS/PERFMON
IDMS/Culprit
IDMS/Schemaplus
IDMS/Tools
IDMS/Group
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What can Formula OpenSoft offer you?What can Formula OpenSoft offer you?
High level IDMS expertise (SysPlex, LE, Tuning,...)
Add-on IDMS – ODBC, JDBC from CrossAccess (Relational on Legacy)
– Z/Services from InnerAccess IDMS, CICS, IMS Transformers using SOAP and WDSL Publish MF applications within ASP, JSP, … OCA-MQSeries, OCA-TCP/IP, OCA-Commit, OCA-Syslink,
OCA-DB2.
ProActive SQL and INDEXES Optimisations– ORACLE, UDB, MS-SQL Server, Sybase
AUTOMON/CICS and more at www.formulaopensoft.com