U41117-J-Z125-7-76
Contents
4.1.3
System administrator activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
4.1.3.1
Adding a logical volume group . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.1.3.2
Adding a physical volume group . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.1.3.3
Adding logical volumes to a logical volume group . . . . . . . . . . . . . . . . . . 66
4.1.3.4
Adding physical volumes to a physical volume group . . . . . . . . . . . . . . . . 67
4.1.3.5
Assigning an LVG to a PVG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
4.1.3.6
Removing an assignment between an LVG and a PVG . . . . . . . . . . . . . . . 67
4.1.3.7
Changing logical volumes to another group . . . . . . . . . . . . . . . . . . . . . 68
4.1.3.8
Removing logical volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
4.1.3.9
Removing logical volume groups . . . . . . . . . . . . . . . . . . . . . . . . . . 68
4.1.3.10
Removing physical volumes from a physical volume group . . . . . . . . . . . . . 69
4.1.3.11
Removing physical volume groups . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.2
Cache management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
4.3
Dual Save . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
4.3.1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
4.3.2
System administrator activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
4.3.2.1
Assigning a logical volume group to two physical volume groups . . . . . . . . . . 72
4.3.2.2
Removing a Dual Save assignment . . . . . . . . . . . . . . . . . . . . . . . . . 72
4.4
Reorganization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
4.4.1
Why do we need reorganization? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
4.4.2
How is a physical volume reorganized? . . . . . . . . . . . . . . . . . . . . . . . . . 74
4.4.3
When is a reorganization performed? . . . . . . . . . . . . . . . . . . . . . . . . . . 75
4.4.4
Which physical volume is selected for reorganization? . . . . . . . . . . . . . . . . . 76
4.4.5
Own physical volumes for reorganization backup . . . . . . . . . . . . . . . . . . . . 78
4.4.6
Starting the reorganization of a physical volume . . . . . . . . . . . . . . . . . . . . 78
4.4.7
Configuration parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
4.5
Cleaning physical drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
4.6
Synchronization of the system time using NTP . . . . . . . . . . . . . . . . . . . 82
5
Operating and monitoring CentricStor . . . . . . . . . . . . . . . . . . . . . . . . 83
5.1
Technical design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
5.1.1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
5.1.2
Principles of operation of GXCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
5.1.3
Monitoring structure within a CentricStor ISP . . . . . . . . . . . . . . . . . . . . . . 87
5.1.4
Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
5.2
Operator configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
5.2.1
Basic configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
5.2.2
Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Summary of Contents for CentricStor V3.1D
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