HP XP7 Storage - Manual (Page 4)

Establishing connections between multiple secondary systems .................................................34
Multiple journals per RAID Manager consistency group .........................................................35
Planning for previous models ...................................................................................................36
Guidelines for preparing systems for Cnt Ac-J Z .........................................................................37
System option modes .........................................................................................................37
4 Planning the data path..............................................................................40
Data path design workflow .....................................................................................................40
Sizing bandwidth ..................................................................................................................40
Five sizing strategies ..........................................................................................................40
Calculating bandwidth ......................................................................................................41
Sizing bandwidth for peak write-workload........................................................................41
Sizing bandwidth for peak rolling average write-workload..................................................43
Latency .......................................................................................................................45
Packet loss ...................................................................................................................45
Planning ports for data transfer ................................................................................................45
Port types..........................................................................................................................46
Cable length and switch requirements.......................................................................................47
Supported data path configurations .........................................................................................48
5 Using extended consistency groups.............................................................50
Overview .............................................................................................................................50
Guaranteed Consistency of Data Update Sequence................................................................50
Consistency time................................................................................................................51
Restoring data to previous time stamps after failure............................................................51
Registering journals in an EXCTG..............................................................................................51
Splitting, restoring, releasing pairs in an EXCTG ........................................................................55
Pair-split operation.............................................................................................................55
Operations for a specific journal .........................................................................................55
Removing journals from an EXCTG ...........................................................................................56
Removing all journals from an EXCTG...................................................................................56
Forcibly removing journals...................................................................................................57
Using EXCTGs with different model storage systems.....................................................................57
Restoring journals manually......................................................................................................59
6 Cnt Ac-J Z configuration operations ............................................................61
Configuration workflow ..........................................................................................................61
Defining fibre-channel port attributes ........................................................................................61
Configuring primary and secondary systems for Cnt Ac-J Z ..........................................................62
Configuring additional remote paths ........................................................................................64
Creating journals and adding journal volumes ..........................................................................64
Assigning an MP blade to a journal..........................................................................................67
7 Cnt Ac-J Z pair operations.........................................................................68
Pair operations workflow.........................................................................................................68
Checking pair status...............................................................................................................68
Creating the Cnt Ac-J Z initial copy ..........................................................................................68
Splitting Cnt Ac-J Z pairs .........................................................................................................71
Splitting mirrors .....................................................................................................................72
Creating point-in-time copies ...................................................................................................73
Resynchronizing Cnt Ac-J Z pairs ..............................................................................................74
Resynchronizing mirrors ..........................................................................................................75
Deleting Cnt Ac-J Z pairs ........................................................................................................76
Deleting pairs in a mirror ........................................................................................................77
8 Monitoring the Cnt Ac-J Z system ...............................................................79
Monitoring pair activity, status, license capacity..........................................................................79
4 Contents