IDMSPLEX Paris 24 juin 2003.

www.formulaopensoft.com 1

IDMSPLEXIDMSPLEX

Paris 24 juin 2003


Implementing and Implementing and

Monitoring Shared CacheMonitoring Shared Cache

in a SysPlex Environmentin a SysPlex Environment

Philippe Jacqmin (Formula OpenSoft)

Jan Rabaut (Schlumberger)


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.


AgendaAgendaWhat is Shared Cache ?Why use Shared Cache ?DEXIA IDMS Transaction ServersWhich Central versions and

Databases ?


AgendaAgenda How to implement Shared Cache ?

– Operating system commands– IDMS commands

How to monitor Shared Cache ? Statistics Implementation

– Planning– Real Life

Conclusions


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


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outdated dataLocal buffers *pages* are invalidated when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


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


CATSYS

DCLOD

DCDML DCLOD

SYSMSG DCMSG


DDLDMLDDLDCLOD

DDLDCMSG


ENV Base Runtime

DDLSEC

DDLCATDDLCATLOD

DDLCATX

SYSUSER

SYSDIRL

DCCATLDCCAT DCCATX

SECDD


CATSYS

DCLOD

DCDML DCLOD

SYSMSG DCMSG


DDLDMLDDLDCLOD

DDLDCMSG

APPLDICT DCDML DCLOD DDLDMLDDLDCLOD

DDLSEC

DDLCATDDLCATLOD

DDLCATX

SYSUSER

SYSDIRL

DCCATLDCCAT DCCATX

SECDD


CATSYS

DCLOD

DCDML DCLOD

SYSMSG DCMSG


DDLDMLDDLDCLOD

DDLDCMSG


USERDBUSERDB

USERDBUSERDB

USERDBUSERDB

USERDBUSERDB

USERDBUSERDB

ENV Base RuntimeENV Base Runtime

T O T

S V15 V20

T CPUC CPUCMFR5 MFR5


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


TST EnvironmentTST Environment

V15

IDMSO

dictdb

V20IDMST

dloddb dcmsgDB

DB


TST EnvironmentTST Environment

V15

IDMSO

dictdb

V20IDMST

dloddb dcmsgDB

DB

XCF


GTU EnvironmentGTU Environment

V03

IDMSCV22

IDMSVV21

IDMSU

DB DB DBdictdb dictdb dictdb


GTU EnvironmentGTU Environment

V03

IDMSCV22

IDMSVV21

IDMSU

DB DB DBdcmsgdloddbdictdb

XCFXCF


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


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


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


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


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


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


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


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


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


IDMS STARTUP IDMS STARTUP MESSAGESMESSAGES

Requesting lockstructure

Requesting liststructure

Connecting the cache structure

Interaction with other CV’s


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


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 DC200084 V16 T1092 RKSISGC2.AR-RKSIVKR Area Varied Update


Monitoring shared cacheMonitoring shared cacheDCMT CommandsLSTSHAREPMDC Broadcasting CommandsPERFMON


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


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


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 -------+


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


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


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


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


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


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


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


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


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.



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



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



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


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


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:


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


DCMT VARY DATA DCMT VARY DATA SHARINGSHARING

>>-- DCMT Vary --- DAta SHAring ---- DEFault Cache -- cache-name -------------><

+- DSG ----------++- ON CONnectivity LOSs --- ABEnd ----¦

+- NOAbend --+


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


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 *** *************** ******** ******** ******** ******** ********


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



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



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


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


Third party softwareThird party softwareJournal layout changedAll third party software which uses

IDMS journals must be adaptedEZ-Reorg (cogito) rel 5.4 tape

c10401PMDC


STATISTICSSTATISTICSCPU usage + 18% Mips growth # TransactionsStorageResourcesI/O


STATISTICS STATISTICS CPU USAGECPU USAGE


STATISTICS STATISTICS MIPS GROWTHMIPS GROWTH


STATISTICS STATISTICS # TRANSACTIONS# TRANSACTIONS


STATISTICS STATISTICS I/OI/O


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%


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%


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


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


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)


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


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


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


Questions - Réponses

Merci

Philippe Jacqmin([email protected])

IDMSPLEX Paris 24 juin 2003.

Documents

rabaut schlumberger

data high availability

multiple central versions

multiple idms central

dexia idms transaction

commands idms commands

stale data

multiple lpars