Lustre 1.6 Operations Manual

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Manual Version Date Details of Edits Bug 3. Replace ‘striping pattern’ instances with ‘file layout’ 4. Update manual content re: forced umount of OST in failover case. 5. Verify URL for PIOS in manual section 19.3 PIOS test tool. 15755 15854 15955 6. Adaptive timeout documentation corrections. 16039 7. mkfs.lustre man page may contain a small error 15832 8. Missing parameters in lctl document. 13477 9. Merge Lustre debugging information. 12046 10. Need to add Lustre mount parameters to manual. 14514 11. Multi-rail LNET configuration. 14534 12. Lustre protocols and Wireshark 12161 13. Loading lnet_selftest modules. 16233 14. DRBD + Lustre performance measurements 14701 15. Many documentation errors. 13554 1.12 04/21/08 1. Additional Lustre manual content - /proc entries. 15039 2. Additional Lustre manual content - atime. 15042 3. Additional Lustre manual content - building kernels. 15047 4. Additional Lustre manual content - Lustre clients. 15048 5. Additional Lustre manual content - compilation. 15050 6. Additional Lustre manual content - Lustre configuration. 7. Additional Lustre manual content - Lustre debugging. 15051 15053 8. Additional Lustre manual content - e2fsck. 15054 9. Additional Lustre manual content - failover. 15074 10. Additional Lustre manual content - evictions. 15071 11. Additional Lustre manual content - file systems. 15079 12. Additional Lustre manual content - hardware. 15080 13. Additional Lustre manual content - kernels. 15085 14. Additional Lustre manual content - network issues. 15102 C-2 Lustre 1.6 Operations Manual • September 2008
Manual Version Date Details of Edits Bug 15. Additional Lustre manual content - Lustre performance. 15108 16. Additional Lustre manual content - quotas. 15110 17. Update the Lustre manual for heartbeat content. 15158 18. ksocklnd module parameter enable_irq_affinity now defaults to zero 19. Multiple mentions of /etc/init.d/lustre in manual. 15174 15510 20. Incorrect flag for tune2fs 15522 1.11 3/11/08 1. Updated content in Failover chapter. 12143 2. Man pages for llapi_ functions. 12043 3. DDN updates to the manual. 12173 4. DDN configuration. 12142 5. Update Lustre manual according to changes in BZ 12786. 6. Add lockless I/O tunables content to the Lustre manual. 7. Small error in LNET self-test documentation sample script. 13475 13833 14680 8. LNET self-test 10916 9. Documentation for Lustre checksumming feature. 12399 10. Ltest OSTs seeing out-of-memory condition. 11176 11. Section 7.1.3 Quota Allocation 14372 12. localflock not documented. 13141 13. Lustre group file quota does not error, allows files up to the hard limit. 13459 14. Changing the quota of a user doesn’t work. 14513 15. Documentation errors. 13554 16. Need details about old clients and new filesystems. 14696 17. Missing build instructions. 14913 18. Update ip2nets section in Lustre manual and add example shown 12382 19. Free space management 12175 Appendix C Version Log C-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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General Installation Notes ■ ■
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. Install the keytab. Note - There
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# uppercase the hex nid=$(echo $nid
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11.2.2 Types of Lustre-Kerberos Fla
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11.2.2.3 Customized Flavor In most
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11.2.2.6 Rules, Syntax and Examples
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CHAPTER 12 Bonding This chapter des
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# ethtool eth1 Settings for eth1: S
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12.4 Bonding Module Parameters Bond
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The examples below are from RedHat
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12.5.1 Examples This is an example
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12.6 Configuring Lustre with Bondin
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CHAPTER 13 Upgrading Lustre The cha
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13.2.2 Supported Upgrade Paths The
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[root@mds1]# tunefs.lustre --mgs --
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13.2.5 Upgrading Multiple File Syst
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13.3 Upgrading Lustre from 1.6.3 to
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13.4 Downgrading Lustre from 1.6.4
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CHAPTER 14 Lustre SNMP Module The L
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14.3 Using the Lustre SNMP Module O
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CHAPTER 15 Backup and Restore This
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15.1.3.1 Backing Up an MDS File To
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3. Mount the filesystem. ■ For 2.
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2. Format LVM volumes as Lustre tar
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15.3.4 Restoring From Old Snapshot
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CHAPTER 16 POSIX This chapter descr
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7. When the system displays this pr
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16.3 Isolating and Debugging Failur
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If this single test is causing prob
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CHAPTER 17 Benchmarking The benchma
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Version 1.03 --Sequential Output--
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17.3 IOzone Benchmark IOZone is a f
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CHAPTER 18 Lustre Recovery This cha
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18.2.2 MDS Failure (and Failover) R
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PART III Lustre Tuning, Monitoring
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19.1.1 Downloading an I/O Kit You c
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The sgpdd_survey script must be cus
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3. Determine the obdfilter instance
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19.2.2.3 Output of the sbdfilter_su
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19.3 PIOS Test Tool The PIOS test t
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19.3.2 PIOS I/O Modes There are sev
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Offset(o): Distance between two suc
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19.3.4 PIOS Examples To create a 1
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19.4.1.2 Utilities LNET self-test h
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Note - This script can be easily ad
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19.4.3.2 Group This section lists l
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del_group NAME Removes a group from
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There are only two test types: --pi
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19.4.3.4 Other Commands This sectio
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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
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 460 and 461: 32.5.10 llobdstat The llobdstat uti
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 484 and 485: Manual Version Date Details of Edit
Page 486 and 487: 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
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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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