IBM SC34-7012-01 manuály

Ibm SC34-7012-01 Uživatelský manuál (268 strany)

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Recovery and Restart Guide

1

Contents

5

Contents v

7

What this book is about

9

Who should read this book

9

How to use this book

9

Release 1

11

Logging changes

15

The role of CICS

16

Recoverable resources

17

Emergency restart backout

18

CICS forward recovery

19

XCF/MRO partner failures

21

Units of work

25

Shunted units of work

25

Synchronization points

27

CICS recovery manager

29

Recovery

30

CICS system log

33

System activity keypoints

34

Forward recovery logs

34

Normal shutdown processing

37

First quiesce stage

37

Second quiesce stage

38

Third quiesce stage

38

Warm keypoints

39

Flushing journal buffers

40

Uncontrolled termination

42

Cataloging CICS resources

43

Global catalog

43

Local catalog

44

Warm restart

47

Emergency restart

47

Cold start

48

Dynamic RLS restart

49

Chapter 4. CICS cold start

57

Temporary storage

59

Transient data

59

Monitoring and statistics

61

Terminal control resources

61

Dump table

62

Chapter 4. CICS cold start 51

63

Chapter 5. CICS warm restart

65

Data set name blocks

66

Transactions

68

LIBRARY resources

68

Programs

68

Start requests

69

Other backout processing

74

CICS ARM processing

79

Registering with ARM

80

De-registering from ARM

80

Failing to register

81

ARM couple data sets

81

Workload policies

82

Connecting to VTAM

82

The COVR transaction

83

Server ARM processing

83

Unit of work recovery

85

Transaction backout

86

Intrapartition transient data

88

Auxiliary temporary storage

88

START requests

88

EXEC CICS CANCEL requests

90

Backout-failed recovery

91

Commit-failed recovery

95

Indoubt failure recovery

96

Cache failure support

100

Lost locks recovery

101

Transaction abend processing

104

Exit code

104

Transaction restart

105

Terminal error processing

109

Node error program (DFHZNEP)

109

End user’s standby procedures

115

Security

116

Documentation and test plans

117

About this task

119

Defining log streams to MVS

120

Defining system log streams

120

Recovery considerations

122

Activity keypointing

124

Log-tail deletion

126

Writing user-recovery data

127

Long-running transactions

128

Procedure

128

What to do next

129

Defining the log of logs

130

Log of logs failure

131

Reading log streams offline

131

Adjusting local time

132

Recovery for transactions

135

Recovery for files

137

VSAM files

137

Forward recovery

138

Backward recovery

138

BDAM files

141

The CSD data set

141

Logical recovery

144

Physical recovery

144

Recovery for Web services

148

Persistent message processing

150

SAA-compatible applications

155

Program design

155

Processing dialogs with users

156

Main storage areas

157

CICS recoverable resources

157

Terminal paging through BMS

160

Using transient data queues

160

Transaction failures

161

HANDLE ABEND commands

162

Dynamic transaction backout

162

System failures

163

START TRANSID commands

165

Implicit locking for files

166

Recoverable files

167

XRCINIT exit

173

XRCINPT exit

173

XFCBFAIL global user exit

173

XFCLDEL global user exit

174

XFCBOVER global user exit

174

XFCBOUT global user exit

174

The CICS-supplied PEP

175

Your own PEP

176

Omitting the PEP

177

Quiescing RLS data sets

179

INQUIRE DSNAME

187

INQUIRE UOWDSNFAIL

187

SHCDS LIST subcommands

188

CEMT command examples

190

A special case: lost locks

192

Overriding retained locks

192

Post-batch processing

193

Using the REPRO method

195

Rebuilding alternate indexes

198

//SYSIN DD *

200

SHCDS FRSETRR(old_dsname)

200

SHCDS FRUNBIND(old_dsname)

200

Catalog recovery

209

BWO and concurrent copy

215

BWO and backups

215

BWO requirements

216

Hardware requirements

217

How you request BWO

218

Removing BWO attributes

220

Systems administration

220

BWO processing

221

File opening

222

File closing (non-RLS mode)

224

Shutdown and restart

225

Data set backup and restore

225

VSAM access method services

226

Forward recovery logging

227

Chapter 19. Disaster recovery

235

Disaster recovery testing

236

Tier 0: no off-site data

237

Tier 1 - physical removal

237

Tier 3 - electronic vaulting

239

Tier 0–3 solutions

240

Tier 0 - 3

241

37453745

242

Tier 4–6 solutions

245

PPRC or XRC?

247

Remote Recovery Data Facility

248

Disaster recovery facilities

250

Final summary

252

Part 4. Appendixes

253

Trademarks

256

Bibliography

257

Other CICS publications

258

Accessibility

259

SC34-7012-01

266

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