2 .TH lnetctl 8 "2017 Jan 12" Lustre "configuration utilities"
8 .B lnetctl --list-commands
10 \fBlnetctl\fR \fB<cmd> <subcmd> [optional parameters]\fR
14 \fBlnetctl\fR is used to configure LNet parameters allowing various configuration
15 and debugging features to be accessed\.
18 \fBlnetctl\fR can be invoked in interactive mode by issuing lnetctl command\.
19 After that, commands are issued as below\.
22 To get a complete listing of available commands, type
24 at the lnetctl prompt\. To get basic help on the meaning and syntax of a command
25 type \fB<command>\fR \-\-help\.
28 For non\-interactive use the \fBlnetctl\fR utility can be invoked from the
29 command line as follows:
32 lnetctl \fIcommand\fR \fIsubcommand\fR [optional parameters]
34 .SS "LNet Initialization:"
37 \fBlnetctl lnet\fR configure [\-\-all]
38 Brings up the LNet Network Interface (NI) system\. If the \-\-all option is
39 provided it will load network interfaces defined in the modprobe files\.
40 Otherwise, it doesn\'t initialize any networks by default\.
43 \fBlnetctl lnet\fR unconfigure
44 Brings down the LNet Network Interface (NI) system including any configured
47 .SS "Network Configuration"
51 Configures a network interface either given the network name and physical
52 interface device name, or given the ip2net parameter\. Other parameters
56 \-\-net: net name (e.g. tcp0)
59 \-\-if: physical interface (e.g. eth0)
62 \-\-ip2net: specify networks based on IP address patterns
65 \-\-peer\-timeout: time to wait before declaring a peer dead (in seconds).
66 Default value for o2iblnd and socklnd is 180 seconds.
69 \-\-peer\-credits: define the max number of in\-flight messages per peer.
72 \-\-peer\-buffer\-credits: the max number of routed in\-flight messages
76 \-\-credits: The total number of in\-flight messages over a network interface.
79 \-\-cpt: The CPU partitions on which the created network interface is bound to.
80 Refer to the Lustre Manual Section "Binding Network Interface Against CPU
81 Partitions" for more details. For example to bind a Network Interface to
82 CPU partitions 0 and 1, you would specify this parameter as \-\-cpt [0,
90 Delete a network interface given the network name\.
93 \-\-net: net name (e.g. tcp0)
99 \fBlnetctl net\fR show
100 Show all currently configured network interfaces if no parameters given or filter
101 on the network name\. More details can be shown by specifying the \-\-verbose
105 \-\-net: net name (e.g. tcp0) to filter on
108 \-\-verbose: display detailed output per network
111 .SS "Peer Configuration"
113 \fBlnetctl peer\fR add
114 Configure an LNET peer with at least one supplied NID\. By default, peers are marked as multi-rail capable\. If prim_nid is not specified, the first NID in this list is assumed to be the primary NID for the peer.
118 \-\-nid: one or more peer NIDs to add to the peer\.
122 \-\-prim_nid: Primary NID of the peer\.
125 \-\-non_mr: create this peer as not Multi-Rail capable\.
130 \fBlnetctl peer\fR del
131 Delete a peer NID. The primary NID must be specified. If the removed NID is the primary NID, the peer entry will be deleted.
135 \-\-nid: one or more peer NIDs to remove from the peer\.
139 \-\-prim_nid: Primary NID of the peer\.
144 \fBlnetctl peer\fR show
145 Show configured peers. By default, lists all peers and associated NIDs.
149 \-\-nid: list of primary nids to filter on
153 \-\-verbose: Include extended statistics, including credits and counters.
158 .SS "Route Configuration"
161 \fBlnetctl route\fR add
165 \-\-net: net name (e.g. tcp0)
168 \-\-gateway: gateway nid (e.g. 10\.1\.1\.2@tcp)
171 \-\-hop: number to final destination (1 < hops < 255)
174 \-\-priority: priority of route (0 \- highest prio)
180 \fBlnetctl route\fR del
181 Delete a route specified via the network and gateway\.
184 \-\-net: net name (e.g. tcp0)
187 \-\-gateway: gateway nid (e.g. 10\.1\.1\.2@tcp)
193 \fBlnetctl route\fR show
194 Show all currently configured routes if no parameters given, or filter on
195 given parameters\. More details can be shown by specifying the \-\-verbose
199 \-\-net: net name (e.g. tcp0) to filter on
202 \-\-gateway: gateway nid (e.g. 10\.1\.1\.2@tcp) to filter on
205 \-\-hop: number to final destination (1 < hops < 255) to filter on
208 \-\-priority: priority of route (0 \- highest prio to filter on)
211 \-\-verbose: display detailed output per route
216 .SS "Routing Information"
219 \fBlnetctl routing\fR show
220 Show router buffers values as well as show the status of routing (IE: whether
221 the node is set to be a router)
224 Individual values can be set using the \fBlnetctl set\fR command\.
227 \fBlnetctl set\fR tiny_buffers \fIvalue\fR
228 Set the number of tiny buffers in the system\. This is the total number of tiny
229 buffers for all CPU partitions\.
232 \fBlnetctl set\fR small_buffers \fIvalue\fR
233 Set the number of small buffers in the system\. This is the total number of
234 small buffers for all CPU partitions\.
237 \fBlnetctl set\fR large_buffers \fIvalue\fR
238 Set the number of large buffers in the system\. This is the total number of
239 large buffers for all CPU partitions\.
242 \fBlnetctl set\fR routing \fI[0, 1]\fR
243 0 value indicates to disable routing\. 1 value indicates to enable routing\.
244 When routing is disabled the values of the buffers that might have been changed
245 are not remembered, and the next time routing is enabled the default buffer
249 \fBlnetctl set\fR drop_asym_route \fI[0, 1]\fR
250 0 value indicates to accept asymmetrical route messages\. 1 value indicates to
251 drop them\. Asymmetrical route is when a message from a remote peer is coming
252 through a router that would not be used by this node to reach the remote peer\.
254 .SS "Import and Export YAML Configuration Files"
255 LNet configuration can be represented in YAML format\. A YAML configuration
256 file can be passed to the lnetctl utility via the \fBimport\fR command\. The
257 lnetctl utility will attempt to configure all elements defined in the YAML
261 Similarly the \fBexport\fR command can be used to dump all supported LNet
262 configuration to stdout\. The output can be redirected to a file\.
265 \fBlnetctl import\fR \fIFILE\fR:
269 \fBlnetctl import\fR < \fIFILE\fR
270 \fBimport\fR command uses the specified YAML configuration file to configure
271 LNet parameters defined within\. The import command by default adds the LNet
272 parameters defined in the YAML file, but this default behavior can be
273 overwritten by specifying the desired behavior\.
276 \-\-add: add configuration
279 \-\-del: delete configuration
282 \-\-show: show configuration
285 \-\-help: display this help
288 \fBlnetctl export\fR \fIFILE\fR:
292 \fBlnetctl export\fR > \fIFILE\fR
293 \fBexport\fR command dumps the supported LNet configuration in YAML format to
294 stdout, which can be redirected to a normal file\. The output of the
295 \fBimport\fR command can be used as input to the \fBexport\fR command\.
298 \-\-help: display this help
300 .SS "LNet Statistics"
307 \-> Number of messages allocated
310 \-> Maximum number of messages allocated
313 \-> Number of errors encountered
316 \-> Number of messages sent
319 \-> Number of messages received
322 \-> Number of messages routed
325 \-> Total size in bytes of messages sent
328 \-> Total size in bytes of messages received
331 \-> Total size in bytes of messages routed
334 \-> Total size in bytes of messages dropped
339 .SS "Showing Peer Credits"
342 \fBlnetctl peer_credits\fR
343 Show details on configured peer credits
352 \-> Reference count on the peer
355 \-> Maximum transmit credits
358 \-> Available transmit credits
361 \-> Available router credits
364 \-> Minimum router credits\.
369 Output a list of the commands supported by the lnetctl utility
372 .SS "Initializing LNet after load"
375 lnetctl lnet configure
378 lnetctl lnet configure \-\-all
382 .SS "Shutting down LNet"
385 lnetctl lnet unconfigure
392 lnetctl net add \-\-net tcp0 \-\-if eth0
395 lnetctl net add \-\-ip2net "tcp0(eth0) 192\.168\.0\.[2,4]; tcp0 192\.168\.0\.*;
396 o2ib0 132\.6\.[1\-3]\.[2\-8/2]"
403 lnetctl net del \-\-net tcp0
410 lnetctl net show \-\-verbose:
432 peer_buffer_credits: 0
438 \- nid: 192\.168\.205\.130@tcp1
462 peer_buffer_credits: 0
472 lnetctl route add \-\-net tcp0 \-\-gateway 10\.10\.10\.1@tcp1 \-\-hop 1
480 lnetctl route del \-\-net tcp0 \-\-gateway 10\.10\.10\.1@tcp1
487 lnetctl route show \-\-verbose
498 gateway: 192\.168\.205\.131@tcp1
504 priority: 0 state: down
569 .SS "Setting variables"
572 lnetctl set tiny_buffers 2048
575 lnetctl set small_buffers 16384
578 lnetctl set large_buffers 256
581 lnetctl set routing 1
585 .SS "Importing YAML files for configuring"
588 lnetctl import lnet\.conf
591 lnetctl import < lnet\.conf
595 .SS "Exporting LNet Configuration"
598 lnetctl export lnet\.conf
601 lnetctl export > lnet\.conf
605 .SS "Showing LNet Stats"
650 .SS "Showing peer information"
661 \- primary nid: 10\.148\.0\.8@o2ib
670 \- nid: 10\.148\.0\.8@o2ib
676 \- primary nid: 10\.148\.0\.20@o2ib
685 \- nid: 10\.148\.0\.20@o2ib
691 \- nid: 10\.148\.0\.25@o2ib