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Valutato. / 5. Basato su recensioni clienti
Creating and modifying file systems5–32
5. Select the service and then select the preferred server for the service.
Repeat this step for each service where you want to change the preferred server. When you have
made your changes, press the Return key without selecting a service.
6. Restart the file system, as shown in the following example:
sfs> start filesystem data
7. When the file system restarts, the client nodes can remount the file system. If a client node fails to
remount the file system, reboot the client node.
5.6.3 Modifying service mount options
Underlying the OST and MDS services on the Lustre file systems, there are ldiskfs file systems. When an
OST or MDS service starts, it mounts the underlying ldiskfs file system so that it can access the data. You
can specify mount options on these file systems to determine what happens when the file systems are
mounted.
In HP SFS Version 2.2, the extents and the mballoc mount options are supported for OST services:
• Enabling the extents option on file systems underlying OST services improves file system
performance; for this reason, the default when creating a file system is to enable this option on OST
services. Do not set this mount option on MDS services.
• The setting for the mballoc option is determined by the file I/O pattern specified for the file system.
Do not change the setting for the mballoc option on an existing file system.
The acl and user_xattrs options may be set for MDS services:
• The acl option must be enabled if Access Control Lists (ACLs) are to be used when the file system is
mounted on client nodes.
• The user_xattrs option must be enabled if extended attributes are to be used when the file system
is mounted.
HP recommends that you enable the ACL functionality on your HP SFS file systems, unless your system is
running in Portals compatibility mode.
CAUTION: If your system is running in Portals compatibility mode, do not enable the acl option or the
user_xattrs option on a file system. Client nodes will not be able to successfully mount a file system that
has these options enabled while the system is running in Portals compatibility mode.
Changing mount options can have irreversible effects on file systems. HP recommends that you do not
experiment with changing mount options unless specifically requested to do so by your HP Customer Support
representative.
To specify mount options, perform the following steps:
1. Unmount the file system on all client nodes.
2. Stop the file system as shown in the following example, where the data file is system is stopped:
sfs> stop filesystem data
Do not proceed to the next step (running the modify filesystem command) until the file system is
stopped; the file system is stopped when all of the file system services are in the stopped or down
state. See Section 3.7 for more information on the stop filesystem command.
- System User Guide 1
- Version 2.2 1
- Contents 3
- 4 Viewing system information 4
- A CLI commands 9
- About this guide 11
- HP SFS documentation 12
- Documentation conventions 12
- Naming conventions 13
- For more information 13
- Providing feedback 13
- Safety considerations 15
- 1Overview 17
- 1.1 Product overview 18
- 1.1.2 Overview of HP SFS 19
- 1.1.3 HP SFS configurations 20
- 1.1.3.2 Storage 21
- 1.1.3.3 Network connections 23
- 1.1.3.3.2 Management network 24
- 1.3 Supported hardware 25
- Overview1–10 26
- 2 The sfsmgr utility 27
- 2.1 Overview 28
- 2.2 Starting the SFS CLI 28
- 2.3 Running sfsmgr commands 29
- The sfsmgr utility2–6 32
- 3 Operating the system 33
- 3.1 Booting the system 34
- 3.2 Shutting down the system 36
- 3.3 Booting a server 36
- 3.4 Booting multiple servers 37
- 3.7 Stopping a file system 39
- 3.8 Starting a file system 40
- 3.11 Managing licenses 47
- 3.12 Managing remote access 53
- 3.12.3 Viewing authorizations 55
- 4Viewing system information 57
- 4.4 Viewing LUN information 67
- 4.5 Viewing array information 69
- 4.6 Viewing event logs 72
- 4.6.1.1 Event filters 73
- 4.6.1.2 Event severity 73
- 4.6.1.3 Event facility 73
- LUNs — EVA4000 storage 88
- File system name 100
- Mount point 100
- Stripe size 100
- MDS LUNs 100
- Number of OST services 101
- Interconnects 102
- Quota options 102
- Mount options 102
- Stripe count 102
- 5.4 Operating a file system 111
- 5.7 Managing quotas 121
- command on 123
- # lfs quotacheck -ug /data 124
- 5.7.3 Checking quota limits 125
- 5.10 Deleting file systems 127
- 6.1 Verifying the system 132
- Verifying the system 6–5 135
- # ssh south3-adm hostname 150
- Sequential test 151
- Parallel test 152
- Incremental test 152
- Latency test 157
- Unidirectional bandwidth test 158
- Verifying the system 6–33 163
- 6.2 Managing email alerts 169
- 6.2.4 Default email alerts 171
- Managing email alerts 6–43 173
- 6.2.5 Modifying email alerts 174
- 6.2.6 Creating email alerts 174
- 6.2.7 Viewing email alerts 175
- 6.2.9 Deleting email alerts 176
- 6.5 Removing log files 180
- 6.6.1 Overview 181
- 6.6.2 Viewing the IML 181
- 6.6.3 Clearing the IML 181
- Configuration impact 201
- Object Storage Server 202
- Number FCA2214 DC) 204
- [root@south4 var]# raw -qa 206
- 8.2 Upgrading firmware 214
- # service cluster stop 216
- 8.3.3 Adding SFS20 arrays 222
- 8.3.4 Removing SFS20 arrays 222
- 9Troubleshooting 225
- 9.2 Server fails to boot 227
- 9.3 Server stops responding 227
- /proc/fs/lustre/mds/mds2 247
- # repair-lfsck -f scratch 250
- Troubleshooting9–34 258
- Remedial action 261
- 9.27.2.1 Recreating files 262
- 9.30 Accessing consoles 275
- 9.31.1.2 Using a Web browser 276
- 9.32 Troubleshooting licenses 277
- 9.36 System log files 288
- ACLI commands 295
- A.1 General information 296
- A.2 accept license command 297
- A.3 activate ost command 297
- A.4 boot server command 297
- A.5 configure commands 298
- A.5.2 configure server 300
- A.6 create commands 301
- A.6.3 create authorization 302
- A.6.4 create database_backup 302
- A.6.5 create filesystem 303
- A.7 deactivate ost command 304
- A.8 delete commands 304
- A.8.2 delete array 305
- A.8.3 delete attribute 305
- A.8.4 delete authorization 305
- A.9 disable commands 306
- A.9.2 disable server 307
- A.10 enable commands 308
- A.11 help command 309
- A.12 kill command command 309
- A.13 modify commands 310
- Interactive mode 311
- Scripted mode 311
- A.14 monitor command command 312
- A.15 pause filesystem command 312
- A.16 quit command 313
- A.18 scan mac command 313
- A.19 set commands 314
- A.19.2 set attribute 315
- A.19.3 set lun 316
- A.19.4 set nics 317
- A.19.5 set password 318
- A.19.6 set server 318
- A.20 show commands 319
- A.20.4 show authorization 320
- A.20.5 show commands 320
- A.20.6 show database_backups 321
- A.20.7 show filesystem 321
- A.20.8 show license 321
- A.20.9 show log 321
- Examples 322
- A.20.10 show lun 323
- A.20.11 show network 323
- A.20.12 show ost 323
- A.20.13 show server 324
- A.20.14 show support 324
- A.20.15 show system 324
- A.20.16 show version 324
- A.21 shutdown server command 325
- A.22 start filesystem command 325
- A.23 stop filesystem command 326
- A.24 syscheck command 326
- A.26 ! command 328
- B Performance figures 329
- B.1 I/O performance 330
- SFS20 storage — 250GB disks 331
- SFS20 storage — 5000GB disks 331
- B.2 Network performance 332
- B.3 SFS20 array configuration 333
- RAID5 and ADG Read Bandwidth 334
- 64 clients 336
- 128 Clients 336
- 192 clients 336
- Bandwidth vs Clients 337
- Single Client Varying OSTs 338
- 1500 MTU Average Write MB/sec 339
- 9000 MTU Average Read MB/sec 340
- C.1 EVA4000 storage examples 344
- EVA4000 storage examples C–3 345
- C.2 SFS20 storage examples 346
- SFS20 storage examples C–5 347
- D.1 RAID rebuild information 350
- E HP SFS specifications 351
- HP SFS specificationsE–4 354
- Glossary 355
- Glossary–2 356
- Glossary–3 357
- Glossary–4 358
- 9-24, 9-25 361
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