RDF/IMP, IMPX, and ZLT System Management Manual

Contents

HP NonStop RDF/IMP, IMPX, and ZLT System Management Manual—524388-002

5. Managing RDF

Running RDFSCAN 4-13

Command Syntax for Starting an RDFSCAN Session 4-13

Using RDFSCAN 4-14

Using RDFSCAN Commands 4-15

Requesting Online Help 4-15

Performing Routine Operational Tasks 4-17

Displaying Current Configuration Parameters and Operating Statistics 4-18

Changing Configuration Parameters 4-22

Reading Log Messages 4-23

5. Managing RDF

Recovering From File System Errors 5-1

Handling Disk Space Problems 5-5

Responding to Operational Failures 5-5

Communications Line Failures 5-6

Processor Failures 5-6

TMF Audited Volume Crash 5-9

TMF Subsystem Crash 5-9

TMF File Recovery Operations 5-11

Stopping RDF 5-11

Stopping RDF by Stopping TMF 5-11

Stopping RDF From the Primary System 5-13

Stopping RDF From the Backup System 5-14

Restarting RDF 5-15

Carrying Out a Planned Switchover 5-15

Standard Configurations for Switchover 5-15

Reciprocal Configurations 5-16

Takeover Operations 5-18

The RDF Takeover Operation 5-18

Preparing for Takeover Processing 5-19

Issuing the TAKEOVER Command 5-19

Monitoring Takeover Outcome 5-20

Takeover Failure 5-21

Takeover and File Recovery 5-21

Checking Exception Files for Uncommitted Transactions 5-22

Preparing for Application Processing on the Backup System 5-22

Restoring the Primary System 5-23

Reading the Backup Database 5-24

Access to Backup Databases in a Consistent State 5-25