Compaq ProLiant 6400R Compaq Parallel Database Cluster Model PDC/05000 for Ora - Page 89

RAID Planning for the MA8000/EMA12000 Storage Subsystem

Get Compaq ProLiant 6400R PDF manuals and user guides View all Compaq ProLiant 6400R manuals
Add to My Manuals
Save this manual to your list of manuals

Page 89 highlights

Cluster Planning 4-15 RAID Planning for the MA8000/EMA12000 Storage Subsystem Storage subsystem performance is one of the most important aspects of tuning database cluster servers for optimal performance. Efforts to plan, configure, and tune a PDC/O5000 cluster should focus on getting the most out of each disk drive and having an appropriate number of shared storage drives in the cluster. When properly configured, the I/O subsystem should not be the limiting factor in overall cluster performance. RAID technology provides cluster servers with more consistent performance, higher levels of fault tolerance, and easier fault recovery than non-RAID systems. RAID uses redundant information stored on different disks to ensure that the cluster can survive the loss of any disk in the array without affecting the availability of data to users. RAID also uses the technique of striping, which involves partitioning each drive's storage space into units ranging from a sector (512 bytes) up to several megabytes. The stripes of all the disks are interleaved and addressed in order. In this cluster, each node is connected to shared storage disk drive arrays that are housed in MA8000/EMA12000 Storage Subsystem disk enclosures. When planning the amount of shared storage for your cluster, you must consider the following: I The number of shared storage subsystems (MA8000/EMA12000 Storage Subsystems) you intend to install in the PDC/O5000 cluster. You install dedicated shared storage subsystems to each redundant FC-AL or redundant Fibre Channel Fabric in your cluster. You cannot share storage subsystems between redundant FC-ALs or between redundant Fibre Channel Fabrics The greater the number of redundant FC-ALs or redundant Fibre Channel Fabrics present, the more storage subsystems you can install in cluster. I The number of redundant FC-ALs or redundant Fibre Channel Fabrics allowed in a cluster, in turn, depends upon the maximum number of host adapters that can be installed in the ProLiant server model you will be using. Refer to the server documentation for this information. I The appropriate number of shared storage subsystems in a cluster is determined by the performance requirements of your cluster. Refer to "Planning Shared Storage Components for Redundant Fibre Channel Fabrics" and "Planning Shared Storage Components for Redundant Fibre Channel Arbitrated Loops" in this chapter for more information.

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
Cluster Planning
4-15
RAID Planning for the MA8000/EMA12000
Storage Subsystem
Storage subsystem performance is one of the most important aspects of tuning
database cluster servers for optimal performance. Efforts to plan, configure,
and tune a PDC/O5000 cluster should focus on getting the most out of each
disk drive and having an appropriate number of shared storage drives in the
cluster. When properly configured, the I/O subsystem should not be the
limiting factor in overall cluster performance.
RAID technology provides cluster servers with more consistent performance,
higher levels of fault tolerance, and easier fault recovery than non-RAID
systems. RAID uses redundant information stored on different disks to ensure
that the cluster can survive the loss of any disk in the array without affecting
the availability of data to users.
RAID also uses the technique of
striping
, which involves partitioning each
drive
’
s storage space into units ranging from a sector (512 bytes) up to several
megabytes. The stripes of all the disks are interleaved and addressed in order.
In this cluster, each node is connected to shared storage disk drive arrays that
are housed in MA8000/EMA12000 Storage Subsystem disk enclosures. When
planning the amount of shared storage for your cluster, you must consider the
following:
■
The number of shared storage subsystems (MA8000/EMA12000
Storage Subsystems) you intend to install in the PDC/O5000 cluster.
You install dedicated shared storage subsystems to each redundant
FC-AL or redundant Fibre Channel Fabric in your cluster. You cannot
share storage subsystems between redundant FC-ALs or between
redundant Fibre Channel Fabrics The greater the number of redundant
FC-ALs or redundant Fibre Channel Fabrics present, the more storage
subsystems you can install in cluster.
■
The number of redundant FC-ALs or redundant Fibre Channel Fabrics
allowed in a cluster, in turn, depends upon the maximum number of host
adapters that can be installed in the ProLiant server model you will be
using. Refer to the server documentation for this information.
■
The appropriate number of shared storage subsystems in a cluster is
determined by the performance requirements of your cluster.
Refer to
“
Planning Shared Storage Components for Redundant Fibre Channel
Fabrics
”
and
“
Planning Shared Storage Components for Redundant Fibre
Channel Arbitrated Loops
”
in this chapter for more information.