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133
CHAPTER
5
Staging
Staging is the process of copying file data from nearline or offline storage back to
online storage.
This chapter describes the Sun StorageTek SAM file staging capabilities. It contains
the following sections:
■ “About the stager.cmd File” on page 133
■ “Prioritizing Preview Requests” on page 140
■ “Calculating Total Preview Request Priority” on page 144
■ “Setting Up a Preview Request Priority Scheme” on page 144
About the stager.cmd File
You can use the stager.cmd file to specify the stager’s behavior. The full path name
to this file is /etc/opt/SUNWsamfs/stager.cmd. The default behavior of the
stager is as follows:
■ The stager attempts to use all the drives in the library to stage files.
■ The stage buffer size is determined by the media type, and the stage buffer is not
locked.
■ No log file is written.
■ Up to 1000 stage requests can be active at any one time.
The stager.cmd file enables you to specify directives to override the default
behaviors. You can configure the stager to stage files immediately, to never stage
files, to specify partial staging, and to specify other staging actions. The never-stage
capability can be used, for example, by applications that randomly access small
records from large files; when this is enabled, the data is accessed directly from the
archive media without staging the file online.
- Sun StorageTek 1
- Storage Archive Manager (SAM) 1
- Archive Configuration and 1
- Administration Guide 1
- Contents 3
- Contents v 5
- ▼ To Load a Cartridge 31 5
- ▼ To Unload a Cartridge 32 5
- Contents vii 7
- ▼ To Enable Disk Archiving 95 7
- Contents ix 9
- Tables xvii 17
- ■ Solaris 10 19
- How This Book Is Organized 20
- Using UNIX Commands 20
- Shell Prompts 21
- Typographic Conventions 21
- Related Documentation 22
- Third-Party Web Sites 23
- Licensing 24
- Installation Assistance 24
- Sun Welcomes Your Comments 24
- Overview 25
- Storage Devices 27
- Sun SAM-Remote Software 28
- Sun Cluster (HA-SAM) 28
- File System Manager 29
- Accounts 30
- Assigning Privilege Levels 31
- System Manager 33
- Using Automated Libraries and 35
- Manually Loaded Drives 35
- Automated Library Operations 36
- To Manually Load a Cartridge 39
- Labeling a Cartridge 40
- To Audit a Volume 41
- Arguments for auditslot(1M) 42
- Using a Cleaning Cartridge 43
- # chmed +C 50:77 44
- # chmed –count 20 50:77 44
- Arguments for chmed(1M) 45
- To Clean a Tape Drive 46
- Tape Drive Auto-Cleaning 46
- To Clear Media Errors 47
- Exporting Cartridges 49
- Arguments for samexport(1M) 53
- To Enable Load Notification 54
- To Load a Cartridge 55
- To Unload a Cartridge 56
- To View a Library Catalog 56
- Archiving 57
- Archiver Daemons 58
- Archive Sets 58
- Archiving Operations 59
- Chapter 3 Archiving 37 61
- Continuous Archiving 62
- Scanned Archiving 62
- Chapter 3 Archiving 39 63
- Chapter 3 Archiving 41 65
- Chapter 3 Archiving 43 67
- Sample Default Output 68
- Chapter 3 Archiving 45 69
- TABLE 3-1 69
- Data Verification 70
- About the archiver.cmd File 71
- The archiver.cmd File 72
- Chapter 3 Archiving 49 73
- TABLE 3-2 73
- Example archiver.cmd File 74
- Using Archiver Directives 75
- Global Archiving Directives 76
- Chapter 3 Archiving 53 77
- Used for Archiving 78
- Chapter 3 Archiving 55 79
- TABLE 3-6 79
- Chapter 3 Archiving 57 81
- Consolidation 83
- File System Directives 85
- Assigning Archive Sets 86
- Chapter 3 Archiving 63 87
- TABLE 3-9 87
- TABLE 3-10 88
- -name regex 89
- Examples 90
- 1 1s 91
- -release attribute 92
- -stage attribute 92
- file systems are archived 93
- allfiles 93
- Archive Copy Directives 94
- Setting the Archive Age 95
- file system is made after 4 96
- 1 4h 96
- Archive Set Copy Parameters 97
- -archmax target-size 98
- -bufsize=buffer-size 98
- -drivemax max-size 99
- -drivemin min-size 99
- -drives number 99
- < 20 gigabytes 1 100
- > 50 gigabytes 5 100
- Chapter 3 Archiving 77 101
- Specifying Recycling 102
- Chapter 3 Archiving 79 103
- Controlling Unarchiving 104
- Reserving Volumes: -reserve 105
- -reserve set users.1// 106
- Data.1// 106
- -reserve dir proj.1/p105/ 106
- -reserve user users.1/user5/ 107
- CODE EXAMPLE 3-29 108
- Archive Priorities 109
- -startsize 110
- VSN Association Directives 111
- Argument Meaning 112
- VSN Pools Directives 113
- # archiver -lv 114
- About Disk Archiving 115
- Configuration Guidelines 117
- Directives for Disk Archiving 117
- CODE EXAMPLE 3-35 118
- To Enable Disk Archiving 119
- Disk Archiving Examples 120
- Chapter 3 Archiving 97 121
- Example 2 122
- Planning Archiving Operations 123
- The Preview Queue 124
- Archiver Examples 125
- copy:1 arch_age:240 126
- Metadata 127
- Chapter 3 Archiving 105 129
- Various Media 130
- Chapter 3 Archiving 107 131
- Chapter 3 Archiving 109 133
- Optical Media 134
- Chapter 3 Archiving 111 135
- Chapter 3 Archiving 113 137
- Releasing 139
- Releaser Concepts 140
- Chapter 4 Releasing 117 141
- Chapter 4 Releasing 119 143
- TABLE 4-1 144
- About the releaser.cmd File 145
- Priority Directives 146
- Chapter 4 Releasing 123 147
- File Size 148
- Individual File Systems 149
- The no_release and 149
- Specifying Debugging 149
- Minimum Residence Time 150
- Chapter 4 Releasing 127 151
- Planning Releaser Operations 153
- Running the Releaser Manually 154
- Chapter 4 Releasing 131 155
- About the stager.cmd File 157
- # samd config 158
- Setting the Stage Buffer Size 159
- Specifying a Log File 160
- Chapter 5 Staging 137 161
- Example stager.cmd File 163
- Archive Set 163
- Prioritizing Preview Requests 164
- Global VSN and Age Directives 165
- Directives 166
- Chapter 5 Staging 143 167
- Priority 168
- Chapter 5 Staging 145 169
- # chmed +p lt. VSN 170
- # chmed -p lt. media-type 170
- from filling up. This might 171
- Recycling 173
- Chapter 6 Recycling 151 175
- Recycling Tape Libraries 176
- Library Directive 177
- Configuring the Recycler 178
- Creating a recycler.cmd File 179
- To create a recycler.cmd file 179
- Example recycler.cmd File 180
- The -mingain 60 Parameter 181
- The -ignore Parameter 181
- The -mail Parameter 181
- To Run the Recycler 182
- Chapter 6 Recycling 159 183
- Creating a recycler.sh File 184
- Editing the archiver.cmd File 185
- Parameters 187
- Using the Sun SAM-Remote 189
- Software 189
- Features 190
- Requirements 191
- Limitations 191
- Library Catalogs 193
- SAM-Remote Client 193
- Configuring the Software 195
- To Edit the mcf Files 197
- # samd stop 198
- Client Configuration File 200
- Argument Definition 203
- To Enable Archiving 204
- 0x00000000 No connection 207
- Recycling in a Sun SAM-Remote 209
- Environment—Method 1 209
- # ADIC Scalar 1000 210
- 1 4h 213
- To Recycle no-data VSNs 229
- CODE EXAMPLE 7-25 231
- Environment—Method 2 233
- Advanced Topics 235
- Before You Begin 236
- Chapter 8 Advanced Topics 213 237
- Configuration Instructions 238
- Environment 239
- Using Device Logging 241
- When to Use the Device Log 242
- Enabling the Device Log 243
- Using Removable Media Files 244
- Overflow File 245
- Using Segmented Files 246
- Disaster Recovery 247
- To Enable SEF Reporting 248
- To Generate SEF Report Output 248
- Chapter 8 Advanced Topics 225 249
- Managing the SEF Log File 251
- SEF sysevent Functionality 252
- Vendor-Specific Operational 253
- Procedures 253
- ADIC/Grau Automated Libraries 254
- To Export a Cartridge 255
- To Import a Cartridge 256
- Importing Cartridges 257
- Cleaning Drives 257
- Partitioning 257
- IBM 3494 Libraries 258
- Automated Libraries 259
- To Import Tapes 260
- Exporting Tapes 260
- Libraries 263
- Glossary 267
- Glossary 245 269
- Glossary 247 271
- Glossary 249 273
- Glossary 251 275
- Glossary 253 277
- Index 257 281
- Index 259 283
- Index 261 285
- Index 263 287
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