HP XP P9000 Continuous Access Journal for Mainframe Systems User Guide

ManualsBrandsHP ManualsStorageHP XP P9500 Disk Array

Contents

1 Continuous Access Journal Z overview ..........................................................8

Continuous Access Journal Z software ........................................................................................8

How Continuous Access Journal Z works.....................................................................................8

Hardware and software components...........................................................................................9

P9500 storage systems.......................................................................................................10

Main and remote control units .......................................................................................10

Pair volumes......................................................................................................................11

Journal volumes.................................................................................................................11

Journals............................................................................................................................11

Data path.........................................................................................................................12

Extended consistency groups...............................................................................................12

Remote Web Console ........................................................................................................12

Business Continuity Manager..............................................................................................12

Reference Information..............................................................................................................12

Overview of copy operations...............................................................................................12

Initial copy operation ....................................................................................................13

Update copy operation..................................................................................................13

Read and write I/O during remote copy...............................................................................13

Differential data management..............................................................................................14

S-VOL write option.............................................................................................................14

S-VOL read option.............................................................................................................14

Pair status.........................................................................................................................14

2 Requirements and specifications.................................................................16

System requirements................................................................................................................16

Business Continuity Manager specifications ...............................................................................18

Command device ..................................................................................................................20

3 Planning volumes, P9500 systems...............................................................21

Plan and design workflow .......................................................................................................21

Assessing business requirements for data recovery .....................................................................21

Determining your RPO .......................................................................................................22

Write-workload .....................................................................................................................22

Measuring write-workload...................................................................................................22

Sizing journal volumes ...........................................................................................................23

Planning journals ...................................................................................................................23

Data transfer speed considerations ..........................................................................................24

RAID group configuration ...................................................................................................24

Fibre-channel port configuration...........................................................................................25

Planning journal volumes ........................................................................................................25

Host I/O time stamp .........................................................................................................25

Planning pair volumes ............................................................................................................26

Data and journal volume specifications.................................................................................26

Duplicating VOLSERs .........................................................................................................27

Maximum number of pairs allowed .....................................................................................27

Calculating maximum number of pairs.............................................................................28

Maximum initial copy operations and priorities......................................................................29

Disaster recovery considerations ..............................................................................................30

Error reporting communications (ERC) ..................................................................................30

Sharing volumes with other P9500 software volumes...................................................................31

Planning Cnt Ac-J Z in multiple P9500s using a consistency group.................................................31

Multiple journals per RAID Manager consistency group .........................................................33

Contents 3