Lustre 1.6 Operations Manual

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16.1 Installing POSIX To install POSIX (used for testing Lustre): 1. Download all POSIX files from: http://downloads.clusterfs.com/public/tools/benchmarks/posix/ ■ ■ ■ ■ lts_vsx-pcts-1.0.1.2.tgz install.sh myscen.bld myscen.exec Caution – Do not configure or mount a Lustre filesystem yet. 2. Run the install.sh script and select /home/tet for the root directory for the test suite installation. 3. Install users and groups. Accept the defaults for the packages to be installed. 4. To avoid a bug in the installation scripts where the test directory is not created properly, create a temporary directory to hold the POSIX tests when they are built. $ mkdir -p /mnt/lustre/TESTROOT;chown vsx0.vsxg0 5. Log in as the test user. su - vsx0 6. Build the test suite, run: ../setup.sh Most of the defaults are correct, except the root directory from which to run the test sets. For this setting, specify /mnt/lustre/TESTROOT. Do NOT install pseudo languages. 16-2 Lustre 1.6 Operations Manual • September 2008
7. When the system displays this prompt: Install scripts into TESTROOT/BIN..? Do not immediately respond. Using another terminal (as stopping the script does not work), replace the files /home/tet/test_sets/scen.exec and /home/tet/test_sets/scen.bld with myscen.exec and myscen.bld (downloaded earlier). $ cp .../myscen.bld /home/tet/test_sets/scen.bld $ cp .../myscen.exec /home/tet/test_sets/scen.exec This limits the tests run only to the relevant filesystems and avoids additional hours of other tests on sockets, math, stdio, libc, shell, and so on. 8. Continue with the installation. a. Build the test sets. It proceeds to build and install all of the filesystem tests. b. Run the test sets. Even though it is running them on a local filesystem, this is a valuable baseline to compare with the behavior of Lustre. It should put the results into /home/tet/test_sets/results/0002e/journal. Rename or symlink this directory to /home/tet/test_sets/results/ext3/journal (or to the name of the local filesystem on which the test was run). Running the full test takes about five minutes. Do not re-run any failed test. Results are in a lengthy table at /home/tet/test_sets/results/report. 9. Save the test suite to run further tests on a Lustre filesystem. Tar up the tests, so that you do not have to rebuild each time. Chapter 16 POSIX 16-3
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Lustre 1.6 Operations Manual Sun M
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Please Recycle
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2. Understanding Lustre Networking
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6. Configuring Lustre - Examples 6-
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9. Configuring Quotas 9-1 9.1 Worki
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15. Backup and Restore 15-1 15.1 Lu
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20. LustreProc 20-1 20.1 /proc Entr
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22. Lustre Troubleshooting Tips 22-
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Part IV Lustre for Users 24. Free S
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29. Lustre Programming Interfaces (
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33. System Limits 33-1 33.1 Maximum
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Shell Prompts Shell C shell C shell
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xxiv Lustre 1.6 Operations Manual
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PART I Lustre Architecture Lustre i
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1.1 Lustre File System Lustre is a
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1.2.4 OSTs An OSTs provide back-end
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1.3 Files in the Lustre File System
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1.3.1 Lustre File System and Stripi
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1.3.3 Lustre System Capacity Lustre
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1.5 Lustre Networking In clusters w
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Note - Lustre does not provide redu
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Key features of LNET include: ■
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CHAPTER 3 Prerequisites This chapte
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3.2 Using a Pre-Packaged Lustre Rel
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Another option is to: 1. Install db
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3.3.4 Choosing a Proper Kernel I/O
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3.4 Memory Requirements This sectio
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CHAPTER 4 Lustre Installation This
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4.1.1 MountConf MountConf is shorth
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Note - For detailed information on
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Mounting Lustre on a client node $
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We are mounting by disk label here
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4.2.2.2 Mount with Inactive OSTs Mo
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Client mount for foo: mount -t lust
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$ mount -t lustre -L testfs-MDT0000
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$ cd /tmp/kernels/linux-2.6.9 $ rm
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Use standard RPM commands to instal
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4.3.2.2 Liblustre The Lustre librar
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4.4 Building a Lustre Source Tarbal
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CHAPTER 5 Configuring the Lustre Ne
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5.1.5 Determine Appropriate Mount P
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Note - Depending on the Linux distr
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live_router_check_interval, dead_ro
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5.2.3 Downed Routers There are two
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5.3.2 Stopping LNET Before the LNET
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CHAPTER 6 Configuring Lustre - Exam
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6.1.2 Lustre with Separate MGS and
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How to Create a CSV File Five diffe
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Linux LVM LV (Logical Volume) The C
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The lustre_config.csv file looks li
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Example 1: Simple Lustre configurat
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CHAPTER 7 More Complicated Configur
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Because megan and oscar match the f
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7.2 Elan to TCP Routing Servers meg
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7.3.3 Start clients For the TCP cli
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CHAPTER 8 Failover This chapter des
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For proper resource fencing, the He
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8.1.5 Roles of Nodes in a Failover
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8.4.3 Hardware Requirements for Fai
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8.5.1.1 Configuring Heartbeat This
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. Monitor the syslog on both nodes.
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To get the proper syntax, run: $ st
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8.6 Using MMP The multiple mount pr
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8.7.2 Configuring the Hardware Hear
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Use this procedure: 1. Create the b
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8.7.3.2 Testing 1. Pull power from
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CHAPTER 9 Configuring Quotas This c
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To enable quotas automatically when
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The lfs command now includes these
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This sets a much smaller granularit
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The quota_bunit_sz parameter displa
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9.1.5.2 Quota Limits Available quot
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Quota Event nowait_for_pending_blk_
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CHAPTER 10 RAID This chapter descri
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10.1.3 Understanding Double Failure
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10.2 Insights into Disk Performance
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OST Filesystem: RAID5 with 5 or 9 d
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10.2.1 Sample Graphs The graphs in
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10.2.1.2 Graphs for Read Performanc
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10.3 Creating an External Journal W
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CHAPTER 11 Kerberos This chapter de
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Note - The Heimdal implementation o
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Page 171 and 172: . Install the keytab. Note - There
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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
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Page 223 and 224: 16.3 Isolating and Debugging Failur
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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
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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
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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
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20.1 /proc Entries for Lustre This
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proc/sys/lustre/fail_loc This is th
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20.1.3.1 Configuring Adaptive Timeo
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Note - Changing adaptive timeouts s
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Credits work like a semaphore. At s
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20.2 Lustre I/O Tunables The sectio
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20.2.2 Watching the Client RPC Stre
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20.2.4 Client Read-Write Extents Su
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20.2.5 Watching the OST Block I/O S
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20.2.7 mballoc History /proc/fs/ldi
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Number of groups scanned (grps colu
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20.2.9 Locking /proc/fs/lustre/ldlm
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20.3.1 RPC Information for Other OB
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Where: Parameter Cur. Count Cur. Ra
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20-30 Lustre 1.6 Operations Manual
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21.1.0.1 OSS Service Thread Count T
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21.3 Options to Format MDT and OST
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21.3.3.3 Number of Inodes for OST F
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21.5.3 Setting Write-Back Cache Per
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For example, one OST per tier LUNLa
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21.7 Lockless I/O Tunables The lock
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22.1.2 Lustre Logs The error messag
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22.3 Lustre Performance Tips This s
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22.3.4 OSTs Become Read-Only If the
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22.3.6 Changing Parameters You can
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22.3.8 Default Striping These are t
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22.3.12 Handling/Debugging "Bind: A
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You may also receive this error if
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22.3.17 Handling/Debugging "LustreE
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22.3.22 Number of OSTs Needed for S
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23.1 Lustre Debug Messages Each Lus
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23.2 Tools for Lustre Debugging The
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debug_daemon stop Completely shuts
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4. If you already have a debug log
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23.2.8 Adding Debugging to the Lust
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23.3 Troubleshooting with strace Th
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23.4.1 Determine the Lustre UUID of
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CHAPTER 24 Free Space and Quotas Th
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Examples [lin-cli1] $ lfs df UUID 1
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CHAPTER 25 Striping and I/O Options
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25.1.2 Disadvantages of Striping Th
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You can also use ls -l /proc//fd/ t
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25.3.1 Changing Striping for a Subd
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25.4.1 Round-Robin Allocator When O
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25.6 Other I/O Options This section
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if (close(fd) < 0) { fprintf(stderr
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} /* Ping all OSTs that belong to t
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CHAPTER 26 Lustre Security This cha
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Lustre ACL support is a system-wide
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The root squash UID and GID can be
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CHAPTER 27 Lustre Operating Tips Th
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27.2 A Simple Data Migration Script
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27.4 Failures Running a Client and
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PART V Reference This part includes
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28.1 lfs The lfs utility can be use
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Options The various lfs options are
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Option Description setstripe Create
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Option Description help Provides br
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$ lfs quotacheck -ug /mnt/lustre Ch
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Options The options and description
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Example e2fsck -n -v --mdsdb /tmp/m
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lustre-OST0000: ******* WARNING: Fi
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To fix dangling inodes, lfsck creat
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Options The options and description
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28.5 Handling Timeouts Timeouts are
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29.1.2 Description The group upcall
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Description The llapi_file_create()
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30.1.2 llapi_file_get_stripe Use ll
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30.1.4 llapi_quotactl Use llapi_quo
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Return Values llapi_quotactl() retu
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Important: All old (pre v.1.4.6) Lu
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ip2nets ("") is a string that lists
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The expansion is a list enclosed in
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31.2.2 SOCKLND Kernel TCP/IP LND Th
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31.2.3 QSW LND The QSW LND (qswlnd)
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31.2.5 VIB LND The VIB LND is conne
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31.2.6 OpenIB LND The OpenIB LND is
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ME/MD Queue Length The ptllnd uses
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31.2.8 Portals LND (Catamount) The
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31.2.9 MX LND MXLND supports a numb
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32.1 mkfs.lustre The mkfs.lustre ut
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Option Description --stripe-count-h
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Option Description --index=index Fo
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32.3 lctl The lctl utility is used
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Device Operations Option Descriptio
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Options Use the following options t
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32.4 mount.lustre The mount.lustre
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In addition to the standard mount o
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Options Option Description -b inode
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offset_stats The client offset_stat
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32.5.8 Fast e2fsck Using the uninit
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32.5.10 llobdstat The llobdstat uti
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Example To monitor /proc/fs/lustre/
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LNET self-test includes two user ut
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32.5.14 routerstat The routerstat u
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33.2 Maximum Stripe Size For a 32-b
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33.9 MDS Space Consumption A single
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Modules LNET acceptor accept_port a
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VIB LND service_number arp_retries
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A-6 Lustre 1.6 Operations Manual
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Administrator Tasks Build Install n
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Manual Version Date Details of Edit
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C-8 Lustre 1.6 Operations Manual
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Can I run Lustre in a heterogeneous
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How do I abort recovery? Why would
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Filesystem refuses to mount because
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Is it possible to change the IP add
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Can I change the striping of a file
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How do I resize an MDS / OST filesy
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1. Make a mountpoint for the mkdir
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How do I control multiple services
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Note - CluManager requires two 10M
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1. Try: lconf --cleanup --force 2.
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The following computation is used t
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Example 2: Servers have two tcp net
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If you determine the LAST_ID file o
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Information on the Socket LND (sock
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What should I do if I suspect devic
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In most cases, running e2fsck -fp $
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What operations take place in Lustr
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What is the Lustre data path? On th
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D-38 Lustre 1.6 Operations Manual
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Completion Callback Configlog Confi
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GSS Group Sweeping Scheduling. A di
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LOV LOV descriptor Lustre Lustre cl
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opencache Orphan objects Orphan han
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S Storage Object API Storage Object
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Glossary-12 Lustre 1.6 Operations M
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failover, 4-10 filesystem name, 4-8
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Lustre building, 4-18 building a ta
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Q QSW LND, 31-10 Quadrics Elan, 2-2
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Index-8 Lustre 1.6 Operations Manua
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