Purpose
This document describes the UDSP feature from the user perspective. The document will cover all Intended use cases, list expected behaviour and potential issues for each.
...
Preferred Gateway For Source Net
| UDSP | Behaviour |
|---|
| On PeerB, designate Gateway1 as preferred on tcp2 | All sends from PeerB use Gateway1 |
| Code Block |
|---|
lnetctl udsp add --src tcp2 --rte 192.168.122.102@tcp
lnetctl udsp show
udsp:
- idx: 0
src: tcp2
dst: NA
rte: 192.168.122.102@tcp |
| Use "lnetctl stats show" on Gateway1 and Gateway2. On every send from PeerB to PeerA, "route_count" should increase only on Gateway1. On PeerB, Gateway1 should be listed as preferred for every nid on tcp2: | Code Block |
|---|
lnetctl net show -v 4
net:
- net type: lo
local NI(s):
- nid: 0@lo
status: up
statistics:
send_count: 0
recv_count: 0
drop_count: 0
udsp info:
net priority: -1
nid priority: -1
sent_stats:
put: 0
get: 0
reply: 0
ack: 0
hello: 0
received_stats:
put: 0
get: 0
reply: 0
ack: 0
hello: 0
dropped_stats:
put: 0
get: 0
reply: 0
ack: 0
hello: 0
health stats:
health value: 0
interrupts: 0
dropped: 0
aborted: 0
no route: 0
timeouts: 0
error: 0
tunables:
peer_timeout: 0
peer_credits: 0
peer_buffer_credits: 0
credits: 0
dev cpt: 0
tcp bonding: 0
CPT: "[0]"
- net type: tcp2
local NI(s):
- nid: 192.168.122.110@tcp2
status: up
interfaces:
0: eth0
statistics:
send_count: 319
recv_count: 319
drop_count: 0
udsp info:
net priority: -1
nid priority: -1
Preferred gateway NIDs:
NID-0: 192.168.122.102@tcp
sent_stats:
put: 3
get: 316
reply: 0
ack: 0
hello: 0
received_stats:
put: 0
get: 3
reply: 313
ack: 3
hello: 0
dropped_stats:
put: 0
get: 0
reply: 0
ack: 0
hello: 0
health stats:
health value: 1000
interrupts: 0
dropped: 0
aborted: 0
no route: 0
timeouts: 0
error: 0
tunables:
peer_timeout: 180
peer_credits: 8
peer_buffer_credits: 0
credits: 256
dev cpt: -1
tcp bonding: 0
CPT: "[0]"
- nid: 192.168.122.253@tcp2
status: up
interfaces:
0: eth1
statistics:
send_count: 319
recv_count: 319
drop_count: 0
udsp info:
net priority: -1
nid priority: -1
Preferred gateway NIDs:
NID-0: 192.168.122.102@tcp
sent_stats:
put: 17
get: 302
reply: 0
ack: 0
hello: 0
received_stats:
put: 15
get: 2
reply: 300
ack: 2
hello: 0
dropped_stats:
put: 0
get: 0
reply: 0
ack: 0
hello: 0
health stats:
health value: 1000
interrupts: 0
dropped: 0
aborted: 0
no route: 0
timeouts: 0
error: 0
tunables:
peer_timeout: 180
peer_credits: 8
peer_buffer_credits: 0
credits: 256
dev cpt: -1
tcp bonding: 0
CPT: "[0]" |
|
Preferred Gateway For Source NID
...
Preferred Gateway For Destination NID
| UDSP | Behaviour |
|---|
On PeerB, add UDSP that gives one of the PeerA nids highest priority On PeerB, designate Gateway1 as preferred for the same PeerA nid. | All sends from PeerB go to the prioritized nid of PeerA through the preferred gateway |
| Code Block |
|---|
lnetctl udsp add --dst 192.168.122.103@tcp
lnetctl udsp add --dst 192.168.122.103@tcp --rte 192.168.122.102@tcp
lnetctl udsp show
udsp:
- idx: 0
src: NA
dst: 192.168.122.103@tcp
rte: NA
action:
priority: 0
- idx: 1
src: NA
dst: 192.168.122.103@tcp
rte: 192.168.122.102@tcp |
| Use "lnetctl stats show" on Gateway1 and Gateway2. On every send from PeerB to PeerA, "route_count" should increase only on Gateway1. On PeerA "send_count" and "recv_count" should increase only for the prioritised nid. On PeerB, Gateway1 should be listed as preferred for the specified nid of PeerA on tcp:
PeerB: | Code Block |
|---|
lnetctl peer show -v 4
>>>>
- nid: 192.168.122.103@tcp
udsp info:
net priority: -1
nid priority: 0
Preferred gateway NIDs:
NID-0: 192.168.122.102@tcp
<<<< |
|
Preferred Gateway For Destination Net
| UDSP | Behaviour |
|---|
On PeerB, designate Gateway1 as preferred for tcp remote network | The preferred gateway for tcp is used for all traffic |
| Code Block |
|---|
lnetctl udsp add --dst tcp --rte 192.168.122.102@tcp
lnetctl udsp show
udsp:
- idx: 0
src: NA
dst: tcp
rte: 192.168.122.102@tcp |
| Use "lnetctl stats show" on Gateway1 and Gateway2. On every send from PeerB to PeerA, "route_count" should increase only on Gateway1. On PeerB, Gateway1 should be listed as preferred for every nid on tcp:
PeerB: | Code Block |
|---|
lnetctl peer show -v 4
>>>>
- nid: 192.168.122.103@tcp
udsp info:
net priority: -1
nid priority: -1
Preferred gateway NIDs:
NID-0: 192.168.122.102@tcp
<<<<<
>>>>>
- nid: 192.168.122.154@tcp
udsp info:
net priority: -1
nid priority: -1
Preferred gateway NIDs:
NID-0: 192.168.122.102@tcp
<<<< |
|
