Red Hat GLOBAL FILE SYSTEM 4.7 Guide de l'utilisateur télécharger pdf (Page 102)

Troubleshooting7–6

7.2.5 Troubleshooting stalled mount operations

If a mount operation stalls, you can troubleshoot the problem on the HP SFS system. Refer to Chapter 9 of

the HP StorageWorks Scalable File Share System User Guide (specifically the Troubleshooting client mount

failures section) for more information.

7.3 O p e r a t i o n a l i s s u e s

This section deals with issues that may arise when client nodes are accessing data on Lustre file systems. The

section is organized as follows:

• A find search executes on the global file system on all client nodes (Section 7.3.1)

• Investigating file system problems (Section 7.3.2)

• Reset client nodes after an LBUG error (Section 7.3.3)

• Access to a file system hangs (Section 7.3.4)

• Access to a file hangs (ldlm_namespace_cleanup() messages) (Section 7.3.5)

• Troubleshooting a dual Gigabit Ethernet interconnect (Section 7.3.6)

7.3.1 A find search executes on the global file system on all client nodes

If a find command executes on the global file system on all client nodes simultaneously, it may be because

the slocate package is installed on client nodes. See Section 2.2.3.4 or Section 3.3.4.5 for instructions

on how to configure the slocate package to prevent this problem.

7.3.2 Investigating file system problems

This section provides some useful tips for investigating and solving potential problems with file systems.

To determine how a file is striped across OST services, enter the command shown in the following example,

where the file is called scratch:

# lfs getstripe scratch

OBDS:

0: OST_south2_UUID

1: OST_south2_2_UUID

2: OST_south2_3_UUID

3: OST_south2_4_UUID

./scratch

obdidx objid objid group

1 2 0x2 0

You cannot change the striping configuration on an existing file; however, you can recreate a file and

change the striping configuration on the new file.

To recreate a file with a new striping configuration, perform the following steps:

1. Use the cp command to copy the incorrectly striped file to a new file name, as shown in the following

example, where the incorrectly striped file is called scratch:

# cp scratch scratch.new

# lfs getstripe scratch.new

OBDS:

0: ost1_UUID

1: ost2_UUID

2: ost3_UUID

3: ost4_UUID

./scratch.new

1 2 ... 97 98 99 100 101 102 103 104 105 106 107 ... 133 134

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