1 .TH lctl 1 "2003 Oct 8" Lustre "configuration utilities"
3 lctl \- Low level Lustre filesystem configuration utility
8 .B lctl --device <devno> <command [args]>
12 is used to directly control Lustre via an ioctl interface, allowing
13 various configuration, maintenance, and debugging features to be accessed.
16 can be invoked in interactive mode by issuing lctl command. After that, commands are issued as below. The most common commands in lctl are
35 To get a complete listing of available commands, type
37 at the lctl prompt. To get basic help on the meaning and syntax of a
41 . Command completion is activated with the TAB key, and command history is available via the up- and down-arrow keys.
43 For non-interactive use, one uses the second invocation, which runs command after connecting to the device.
45 .SS Network Configuration
47 .BI network " <up/down>|<tcp/elan/myrinet>"
48 Start or stop LNET, or select a network type for other
53 Print all Network Identifiers on the local node. LNET must be running.
55 .BI which_nid " <nidlist>"
56 From a list of nids for a remote node, show which interface communication
60 Check LNET connectivity via an LNET ping. This will use the fabric
61 appropriate to the specified NID.
64 Print the network interface information for a given
69 Print the known peers for a given
74 Print all the connected remote NIDs for a given
79 This command should print active transmits, and it is only used for elan network type.
82 Print the complete routing table.
86 .BI device " <devname> "
87 This will select the specified OBD device. All other commands depend on the device being set.
90 Show all the local Lustre OBDs. AKA
95 .BI conf_param " <device> <parameter>"
96 Set a permanent configuration parameter for any device via the MGS. This
97 command must be run on the MGS node.
100 Reactivate an import after deactivating, below.
103 Deactivate an import, in particular meaning do not assign new file stripes
104 to an OSC. This command should be used on the OSC in the MDT LOV
105 corresponding to a failed OST device, to prevent further attempts at
106 communication with the failed OST.
109 Abort the recovery process on a restarting MDT or OST device
111 .SS Virtual Block Device Operation
112 Lustre is able to emulate a virtual block device upon regular file. It is necessary to be used when you are trying to setup a swap space via file.
114 .BI blockdev_attach " <file name> <device node>"
115 Attach the lustre regular file to a block device. If the device node is not existent, lctl will create it \- it is recommended to create it by lctl since the emulator uses a dynamical major number.
117 .BI blockdev_detach " <device node>"
118 Detach the virtual block device.
120 .BI blockdev_info " <device node>"
121 Acquire which lustre file was attached to the device node.
126 Start and stop the debug daemon, and control the output filename and size.
128 .BI debug_kernel " [file] [raw]"
129 Dump the kernel debug buffer to stdout or file.
131 .BI debug_file " <input> [output]"
132 Convert kernel-dumped debug log from binary to plain text format.
135 Clear the kernel debug buffer.
138 Insert marker text in the kernel debug buffer.
140 .BI filter " <subsystem id/debug mask>"
141 Filter kernel debug messages by subsystem or mask.
143 .BI show " <subsystem id/debug mask>"
144 Show specific type of messages.
146 .BI debug_list " <subs/types>"
147 List all the subsystem and debug types.
149 .BI modules " <path>"
150 Provide gdb-friendly module information.
153 The following options can be used to invoke lctl.
156 The device to be used for the operation. This can be specified by name or
160 .B --ignore_errors | ignore_errors
161 Ignore errors during script processing
167 0 UP mgc MGC192.168.0.20@tcp bfbb24e3-7deb-2ffa-eab0-44dffe00f692 5
168 1 UP ost OSS OSS_uuid 3
169 2 UP obdfilter testfs-OST0000 testfs-OST0000_UUID 3
172 Debug log: 87 lines, 87 kept, 0 dropped.
176 # lctl conf_param testfs-MDT0000 sys.timeout=40
179 Please report all bugs to Sun Microsystems, Inc. http://bugzilla.lustre.org/
184 filesystem package and is available from Sun Microsystems, Inc.
186 http://www.sun.com/software/products/lustre/index.xml
190 .BR mount.lustre (8),