Lustre 1.6 Operations Manual

More documents

Recommendations

Info

32.5.10 llobdstat The llobdstat utility displays OST statistics. Synopsis llobdstat ost_name [interval] Description The llobdstat utility displays a line of OST statistics for a given OST at specified intervals (in seconds). Option Description ost_name Name of the OBD for which statistics are requested. interval Time interval (in seconds) after which statistics are refreshed. Example # llobdstat liane-OST0002 1 /usr/bin/llobdstat on /proc/fs/lustre/obdfilter/liane-OST0002/stats Processor counters run at 2800.189 MHz Read: 1.21431e+07, Write: 9.93363e+08, create/destroy: 24/1499, stat: 34, punch: 18 [NOTE: cx: create, dx: destroy, st: statfs, pu: punch ] Timestamp Read-delta ReadRate Write-delta WriteRate -------------------------------------------------------- 1217026053 0.00MB 0.00MB/s 0.00MB 0.00MB/s 1217026054 0.00MB 0.00MB/s 0.00MB 0.00MB/s 1217026055 0.00MB 0.00MB/s 0.00MB 0.00MB/s 1217026056 0.00MB 0.00MB/s 0.00MB 0.00MB/s 1217026057 0.00MB 0.00MB/s 0.00MB 0.00MB/s 1217026058 0.00MB 0.00MB/s 0.00MB 0.00MB/s 1217026059 0.00MB 0.00MB/s 0.00MB 0.00MB/s st:1 Files The llobdstat files are located at: /proc/fs/lustre/obdfilter//stats 32-24 Lustre 1.7 Operations Manual • August 2008
32.5.11 llstat The llstat utility displays Lustre statistics. Synopsis llstat [-c] [-g] [-i interval] stats_file Description The llstat utility displays statistics from any of the Lustre statistics files that share a common format and are updated at a specified interval (in seconds). To stop statistics printing, type CTRL-C.h Options Option Description -c Clears the statistics file. -i Specifies the interval polling period (in seconds). -g Specifies graphable output format. -h stats_file Displays help information. Specifies either the full path to a statistics file or a shorthand reference, mds or ost Chapter 32 System Configuration Utilities (man8) 32-25
Page 1 and 2:
Lustre 1.6 Operations Manual Sun M
Page 3:
Please Recycle
Page 6 and 7:
2. Understanding Lustre Networking
Page 8 and 9:
6. Configuring Lustre - Examples 6-
Page 10 and 11:
9. Configuring Quotas 9-1 9.1 Worki
Page 12 and 13:
15. Backup and Restore 15-1 15.1 Lu
Page 14 and 15:
20. LustreProc 20-1 20.1 /proc Entr
Page 16 and 17:
22. Lustre Troubleshooting Tips 22-
Page 18 and 19:
Part IV Lustre for Users 24. Free S
Page 20 and 21:
29. Lustre Programming Interfaces (
Page 22 and 23:
33. System Limits 33-1 33.1 Maximum
Page 24 and 25:
Shell Prompts Shell C shell C shell
Page 26 and 27:
xxiv Lustre 1.6 Operations Manual
Page 29:
PART I Lustre Architecture Lustre i
Page 32 and 33:
1.1 Lustre File System Lustre is a
Page 34 and 35:
1.2.4 OSTs An OSTs provide back-end
Page 36 and 37:
1.3 Files in the Lustre File System
Page 38 and 39:
1.3.1 Lustre File System and Stripi
Page 40 and 41:
1.3.3 Lustre System Capacity Lustre
Page 42 and 43:
1.5 Lustre Networking In clusters w
Page 44 and 45:
Note - Lustre does not provide redu
Page 46 and 47:
Key features of LNET include: ■
Page 49 and 50:
CHAPTER 3 Prerequisites This chapte
Page 51 and 52:
3.2 Using a Pre-Packaged Lustre Rel
Page 53 and 54:
Another option is to: 1. Install db
Page 55 and 56:
3.3.4 Choosing a Proper Kernel I/O
Page 57 and 58:
3.4 Memory Requirements This sectio
Page 59 and 60:
CHAPTER 4 Lustre Installation This
Page 61 and 62:
4.1.1 MountConf MountConf is shorth
Page 63 and 64:
Note - For detailed information on
Page 65 and 66:
Mounting Lustre on a client node $
Page 67 and 68:
We are mounting by disk label here
Page 69 and 70:
4.2.2.2 Mount with Inactive OSTs Mo
Page 71 and 72:
Client mount for foo: mount -t lust
Page 73 and 74:
$ mount -t lustre -L testfs-MDT0000
Page 75 and 76:
$ cd /tmp/kernels/linux-2.6.9 $ rm
Page 77 and 78:
Use standard RPM commands to instal
Page 79 and 80:
4.3.2.2 Liblustre The Lustre librar
Page 81 and 82:
4.4 Building a Lustre Source Tarbal
Page 83 and 84:
CHAPTER 5 Configuring the Lustre Ne
Page 85 and 86:
5.1.5 Determine Appropriate Mount P
Page 87 and 88:
Note - Depending on the Linux distr
Page 89 and 90:
live_router_check_interval, dead_ro
Page 91 and 92:
5.2.3 Downed Routers There are two
Page 93 and 94:
5.3.2 Stopping LNET Before the LNET
Page 95 and 96:
CHAPTER 6 Configuring Lustre - Exam
Page 97 and 98:
6.1.2 Lustre with Separate MGS and
Page 99 and 100:
How to Create a CSV File Five diffe
Page 101 and 102:
Linux LVM LV (Logical Volume) The C
Page 103 and 104:
The lustre_config.csv file looks li
Page 105 and 106:
Example 1: Simple Lustre configurat
Page 107 and 108:
CHAPTER 7 More Complicated Configur
Page 109 and 110:
Because megan and oscar match the f
Page 111 and 112:
7.2 Elan to TCP Routing Servers meg
Page 113 and 114:
7.3.3 Start clients For the TCP cli
Page 115 and 116:
CHAPTER 8 Failover This chapter des
Page 117 and 118:
For proper resource fencing, the He
Page 119 and 120:
8.1.5 Roles of Nodes in a Failover
Page 121 and 122:
8.4.3 Hardware Requirements for Fai
Page 123 and 124:
8.5.1.1 Configuring Heartbeat This
Page 125 and 126:
. Monitor the syslog on both nodes.
Page 127 and 128:
To get the proper syntax, run: $ st
Page 129 and 130:
8.6 Using MMP The multiple mount pr
Page 131 and 132:
8.7.2 Configuring the Hardware Hear
Page 133 and 134:
Use this procedure: 1. Create the b
Page 135 and 136:
8.7.3.2 Testing 1. Pull power from
Page 137 and 138:
CHAPTER 9 Configuring Quotas This c
Page 139 and 140:
To enable quotas automatically when
Page 141 and 142:
The lfs command now includes these
Page 143 and 144:
This sets a much smaller granularit
Page 145 and 146:
The quota_bunit_sz parameter displa
Page 147 and 148:
9.1.5.2 Quota Limits Available quot
Page 149 and 150:
Quota Event nowait_for_pending_blk_
Page 151 and 152:
CHAPTER 10 RAID This chapter descri
Page 153 and 154:
10.1.3 Understanding Double Failure
Page 155 and 156:
10.2 Insights into Disk Performance
Page 157 and 158:
OST Filesystem: RAID5 with 5 or 9 d
Page 159 and 160:
10.2.1 Sample Graphs The graphs in
Page 161 and 162:
10.2.1.2 Graphs for Read Performanc
Page 163 and 164:
10.3 Creating an External Journal W
Page 165 and 166:
CHAPTER 11 Kerberos This chapter de
Page 167 and 168:
Note - The Heimdal implementation o
Page 169 and 170:
General Installation Notes ■ ■
Page 171 and 172:
. Install the keytab. Note - There
Page 173 and 174:
# uppercase the hex nid=$(echo $nid
Page 175 and 176:
11.2.2 Types of Lustre-Kerberos Fla
Page 177 and 178:
11.2.2.3 Customized Flavor In most
Page 179 and 180:
11.2.2.6 Rules, Syntax and Examples
Page 181 and 182:
CHAPTER 12 Bonding This chapter des
Page 183 and 184:
# ethtool eth1 Settings for eth1: S
Page 185 and 186:
12.4 Bonding Module Parameters Bond
Page 187 and 188:
The examples below are from RedHat
Page 189 and 190:
12.5.1 Examples This is an example
Page 191 and 192:
12.6 Configuring Lustre with Bondin
Page 193 and 194:
CHAPTER 13 Upgrading Lustre The cha
Page 195 and 196:
13.2.2 Supported Upgrade Paths The
Page 197 and 198:
[root@mds1]# tunefs.lustre --mgs --
Page 199 and 200:
13.2.5 Upgrading Multiple File Syst
Page 201 and 202:
13.3 Upgrading Lustre from 1.6.3 to
Page 203 and 204:
13.4 Downgrading Lustre from 1.6.4
Page 205 and 206:
CHAPTER 14 Lustre SNMP Module The L
Page 207 and 208:
14.3 Using the Lustre SNMP Module O
Page 209 and 210:
CHAPTER 15 Backup and Restore This
Page 211 and 212:
15.1.3.1 Backing Up an MDS File To
Page 213 and 214:
3. Mount the filesystem. ■ For 2.
Page 215 and 216:
2. Format LVM volumes as Lustre tar
Page 217 and 218:
15.3.4 Restoring From Old Snapshot
Page 219 and 220:
CHAPTER 16 POSIX This chapter descr
Page 221 and 222:
7. When the system displays this pr
Page 223 and 224:
16.3 Isolating and Debugging Failur
Page 225 and 226:
If this single test is causing prob
Page 227 and 228:
CHAPTER 17 Benchmarking The benchma
Page 229 and 230:
Version 1.03 --Sequential Output--
Page 231 and 232:
17.3 IOzone Benchmark IOZone is a f
Page 233 and 234:
CHAPTER 18 Lustre Recovery This cha
Page 235 and 236:
18.2.2 MDS Failure (and Failover) R
Page 237:
PART III Lustre Tuning, Monitoring
Page 240 and 241:
19.1.1 Downloading an I/O Kit You c
Page 242 and 243:
The sgpdd_survey script must be cus
Page 244 and 245:
3. Determine the obdfilter instance
Page 246 and 247:
19.2.2.3 Output of the sbdfilter_su
Page 248 and 249:
19.3 PIOS Test Tool The PIOS test t
Page 250 and 251:
19.3.2 PIOS I/O Modes There are sev
Page 252 and 253:
Offset(o): Distance between two suc
Page 254 and 255:
19.3.4 PIOS Examples To create a 1
Page 256 and 257:
19.4.1.2 Utilities LNET self-test h
Page 258 and 259:
Note - This script can be easily ad
Page 260 and 261:
19.4.3.2 Group This section lists l
Page 262 and 263:
del_group NAME Removes a group from
Page 264 and 265:
There are only two test types: --pi
Page 266 and 267:
19.4.3.4 Other Commands This sectio
Page 268 and 269:
show_error [--session] [GROUP]|[IDs
Page 270 and 271:
20.1 /proc Entries for Lustre This
Page 272 and 273:
proc/sys/lustre/fail_loc This is th
Page 274 and 275:
20.1.3.1 Configuring Adaptive Timeo
Page 276 and 277:
Note - Changing adaptive timeouts s
Page 278 and 279:
Credits work like a semaphore. At s
Page 280 and 281:
20.2 Lustre I/O Tunables The sectio
Page 282 and 283:
20.2.2 Watching the Client RPC Stre
Page 284 and 285:
20.2.4 Client Read-Write Extents Su
Page 286 and 287:
20.2.5 Watching the OST Block I/O S
Page 288 and 289:
20.2.7 mballoc History /proc/fs/ldi
Page 290 and 291:
Number of groups scanned (grps colu
Page 292 and 293:
20.2.9 Locking /proc/fs/lustre/ldlm
Page 294 and 295:
20.3.1 RPC Information for Other OB
Page 296 and 297:
Where: Parameter Cur. Count Cur. Ra
Page 298 and 299:
20-30 Lustre 1.6 Operations Manual
Page 300 and 301:
21.1.0.1 OSS Service Thread Count T
Page 302 and 303:
21.3 Options to Format MDT and OST
Page 304 and 305:
21.3.3.3 Number of Inodes for OST F
Page 306 and 307:
21.5.3 Setting Write-Back Cache Per
Page 308 and 309:
For example, one OST per tier LUNLa
Page 310 and 311:
21.7 Lockless I/O Tunables The lock
Page 312 and 313:
22.1.2 Lustre Logs The error messag
Page 314 and 315:
22.3 Lustre Performance Tips This s
Page 316 and 317:
22.3.4 OSTs Become Read-Only If the
Page 318 and 319:
22.3.6 Changing Parameters You can
Page 320 and 321:
22.3.8 Default Striping These are t
Page 322 and 323:
22.3.12 Handling/Debugging "Bind: A
Page 324 and 325:
You may also receive this error if
Page 326 and 327:
22.3.17 Handling/Debugging "LustreE
Page 328 and 329:
22.3.22 Number of OSTs Needed for S
Page 330 and 331:
23.1 Lustre Debug Messages Each Lus
Page 332 and 333:
23.2 Tools for Lustre Debugging The
Page 334 and 335:
debug_daemon stop Completely shuts
Page 336 and 337:
4. If you already have a debug log
Page 338 and 339:
23.2.8 Adding Debugging to the Lust
Page 340 and 341:
23.3 Troubleshooting with strace Th
Page 342 and 343:
23.4.1 Determine the Lustre UUID of
Page 344 and 345:
Page 347 and 348:
CHAPTER 24 Free Space and Quotas Th
Page 349 and 350:
Examples [lin-cli1] $ lfs df UUID 1
Page 351 and 352:
CHAPTER 25 Striping and I/O Options
Page 353 and 354:
25.1.2 Disadvantages of Striping Th
Page 355 and 356:
You can also use ls -l /proc//fd/ t
Page 357 and 358:
25.3.1 Changing Striping for a Subd
Page 359 and 360:
25.4.1 Round-Robin Allocator When O
Page 361 and 362:
25.6 Other I/O Options This section
Page 363 and 364:
if (close(fd) < 0) { fprintf(stderr
Page 365 and 366:
} /* Ping all OSTs that belong to t
Page 367 and 368:
CHAPTER 26 Lustre Security This cha
Page 369 and 370:
Lustre ACL support is a system-wide
Page 371 and 372:
The root squash UID and GID can be
Page 373 and 374:
CHAPTER 27 Lustre Operating Tips Th
Page 375 and 376:
27.2 A Simple Data Migration Script
Page 377 and 378:
27.4 Failures Running a Client and
Page 379:
PART V Reference This part includes
Page 382 and 383:
28.1 lfs The lfs utility can be use
Page 384 and 385:
Options The various lfs options are
Page 386 and 387:
Option Description setstripe Create
Page 388 and 389:
Option Description help Provides br
Page 390 and 391:
$ lfs quotacheck -ug /mnt/lustre Ch
Page 392 and 393:
Options The options and description
Page 394 and 395:
Example e2fsck -n -v --mdsdb /tmp/m
Page 396 and 397:
lustre-OST0000: ******* WARNING: Fi
Page 398 and 399:
To fix dangling inodes, lfsck creat
Page 400 and 401:
Options The options and description
Page 402 and 403:
28.5 Handling Timeouts Timeouts are
Page 404 and 405:
29.1.2 Description The group upcall
Page 406 and 407:
Page 408 and 409:
Description The llapi_file_create()
Page 410 and 411: 30.1.2 llapi_file_get_stripe Use ll
Page 412 and 413: 30.1.4 llapi_quotactl Use llapi_quo
Page 414 and 415: Return Values llapi_quotactl() retu
Page 416 and 417: Important: All old (pre v.1.4.6) Lu
Page 418 and 419: ip2nets ("") is a string that lists
Page 420 and 421: The expansion is a list enclosed in
Page 422 and 423: 31.2.2 SOCKLND Kernel TCP/IP LND Th
Page 424 and 425: 31.2.3 QSW LND The QSW LND (qswlnd)
Page 426 and 427: 31.2.5 VIB LND The VIB LND is conne
Page 428 and 429: 31.2.6 OpenIB LND The OpenIB LND is
Page 430 and 431: ME/MD Queue Length The ptllnd uses
Page 432 and 433: 31.2.8 Portals LND (Catamount) The
Page 434 and 435: 31.2.9 MX LND MXLND supports a numb
Page 436 and 437: 31-22 Lustre 1.6 Operations Manual
Page 438 and 439: 32.1 mkfs.lustre The mkfs.lustre ut
Page 440 and 441: Option Description --stripe-count-h
Page 442 and 443: Option Description --index=index Fo
Page 444 and 445: 32.3 lctl The lctl utility is used
Page 446 and 447: Device Operations Option Descriptio
Page 448 and 449: Options Use the following options t
Page 450 and 451: 32.4 mount.lustre The mount.lustre
Page 452 and 453: In addition to the standard mount o
Page 454 and 455: Options Option Description -b inode
Page 456 and 457: offset_stats The client offset_stat
Page 458 and 459: 32.5.8 Fast e2fsck Using the uninit
Page 462 and 463: Example To monitor /proc/fs/lustre/
Page 464 and 465: LNET self-test includes two user ut
Page 466 and 467: 32.5.14 routerstat The routerstat u
Page 468 and 469: 33.2 Maximum Stripe Size For a 32-b
Page 470 and 471: 33.9 MDS Space Consumption A single
Page 472 and 473: 33-6 Lustre 1.6 Operations Manual
Page 474 and 475: Modules LNET acceptor accept_port a
Page 476 and 477: VIB LND service_number arp_retries
Page 478 and 479: A-6 Lustre 1.6 Operations Manual
Page 480 and 481: Administrator Tasks Build Install n
Page 482 and 483: Manual Version Date Details of Edit
Page 488 and 489: C-8 Lustre 1.6 Operations Manual
Page 490 and 491: Can I run Lustre in a heterogeneous
Page 492 and 493: How do I abort recovery? Why would
Page 494 and 495: Filesystem refuses to mount because
Page 496 and 497: Is it possible to change the IP add
Page 498 and 499: Can I change the striping of a file
Page 500 and 501: How do I resize an MDS / OST filesy
Page 502 and 503: 1. Make a mountpoint for the mkdir
Page 504 and 505: How do I control multiple services
Page 506 and 507: Note - CluManager requires two 10M
Page 508 and 509: 1. Try: lconf --cleanup --force 2.
Page 510 and 511:
The following computation is used t
Page 512 and 513:
Example 2: Servers have two tcp net
Page 514 and 515:
If you determine the LAST_ID file o
Page 516 and 517:
Information on the Socket LND (sock
Page 518 and 519:
What should I do if I suspect devic
Page 520 and 521:
In most cases, running e2fsck -fp $
Page 522 and 523:
What operations take place in Lustr
Page 524 and 525:
What is the Lustre data path? On th
Page 526 and 527:
D-38 Lustre 1.6 Operations Manual
Page 528 and 529:
Completion Callback Configlog Confi
Page 530 and 531:
GSS Group Sweeping Scheduling. A di
Page 532 and 533:
LOV LOV descriptor Lustre Lustre cl
Page 534 and 535:
opencache Orphan objects Orphan han
Page 536 and 537:
S Storage Object API Storage Object
Page 538 and 539:
Glossary-12 Lustre 1.6 Operations M
Page 540 and 541:
failover, 4-10 filesystem name, 4-8
Page 542 and 543:
Lustre building, 4-18 building a ta
Page 544 and 545:
Q QSW LND, 31-10 Quadrics Elan, 2-2
Page 546:
Index-8 Lustre 1.6 Operations Manua
show all

Lustre 1.6 Operations Manual

Create successful ePaper yourself

Delete template?

Save as template?