Hello Ana,
I have done some more testing.
Kindly look into it.
Setup
NFS Server IP:192.168.122.127
NFS Client IP:192.168.122.125
1- Transport Viewing
# ss
Netid State Recv-Q Send-Q Local
Address:Port Peer Address:Port Process
tcp ESTAB 0 0
192.168.122.125:872 192.168.122.127:nfs
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py xprt
xprt 1: tcp, 192.168.122.127, port 0, state <CONNECTED,BOUND>, main
Source: (enoent), port 872, Requests: 2
Congestion: cur 0, win 256, Slots: min 2, max 65536
Queues: binding 0, sending 0, pending 0, backlog 0, tasks 0
Here port 0 is seen for Remote which is wrong. It should be nfs(2049).
And I guess the name is also wrong. it should not be enoent. It should be
ens3.
2- I made the NIC down on the Server. And can see call traces as in the
attached image. (taken from console so can't paste here)
3- By client I understand RPC Client and if I tune the value of
tcp_slot_table_entries I should see an increase in number of RPC Client as
I would increase parallel connection of RPC Clients.
# ./tools/rpcctl/rpcctl.py client
client 0: switch 0, xprts 1, active 1, queue 0
xprt 1: tcp, 192.168.122.127 [main]
client 3: switch 0, xprts 1, active 1, queue 0
xprt 1: tcp, 192.168.122.127 [main]
# sysctl -a | grep tcp_slot_table_entries
sunrpc.tcp_slot_table_entries = 2
[root@rrathore-upstream-sysfs nfs-utils]# sysctl -w
sunrpc.tcp_slot_table_entries=8
sunrpc.tcp_slot_table_entries = 8
[root@rrathore-upstream-sysfs nfs-utils]#
[root@rrathore-upstream-sysfs nfs-utils]# sysctl -a | grep
tcp_slot_table_entries
sunrpc.tcp_slot_table_entries = 8
[root@rrathore-upstream-sysfs nfs-utils]#
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py client
<----------------------- Change in value of tcp_slot_table_entries doesn't
seem to have an effect
client 0: switch 0, xprts 1, active 1, queue 0
xprt 1: tcp, 192.168.122.127 [main]
client 3: switch 0, xprts 1, active 1, queue 0
xprt 1: tcp, 192.168.122.127 [main]
Later I started nfs and used this server as an NFS Server, then I could see
an increase in number.
# ./tools/rpcctl/rpcctl.py client
client 0: switch 0, xprts 1, active 1, queue 0
xprt 1: tcp, 192.168.122.127 [main]
client 1: switch 1, xprts 1, active 1, queue 0
xprt 0: local, /var/run/rpcbind.sock [main]
client 2: switch 1, xprts 1, active 1, queue 0
xprt 0: local, /var/run/rpcbind.sock [main]
client 3: switch 0, xprts 1, active 1, queue 0
xprt 1: tcp, 192.168.122.127 [main]
client 4: switch 2, xprts 1, active 1, queue 0
xprt 2: local, /var/run/gssproxy.sock [main]
client 5: switch 3, xprts 1, active 1, queue 0
xprt 3: tcp, 192.168.122.29 [main]
4- I am not sure if I am making a mistake or if it's the error due to which
value is not getting set.
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py xprt
xprt 0: local, /var/run/rpcbind.sock, port 0, state <CONNECTED,BOUND>, main
Source: (enoent), port 0, Requests: 8
Congestion: cur 0, win 256, Slots: min 8, max 65536
Queues: binding 0, sending 0, pending 0, backlog 0, tasks 0
xprt 1: tcp, 192.168.122.127, port 0, state <CONNECTED,BOUND>, main
Source: (enoent), port 813, Requests: 2
Congestion: cur 0, win 256, Slots: min 2, max 65536
Queues: binding 0, sending 0, pending 0, backlog 0, tasks 0
xprt 2: local, /var/run/gssproxy.sock, port 0, state <CONNECTED,BOUND>, main
Source: (enoent), port 0, Requests: 8
Congestion: cur 0, win 256, Slots: min 8, max 65536
Queues: binding 0, sending 0, pending 0, backlog 0, tasks 0
xprt 3: tcp, 192.168.122.29, port 0, state <CONNECTED,BOUND>, main
Source: (enoent), port 0, Requests: 8
Congestion: cur 0, win 256, Slots: min 8, max 8
Queues: binding 0, sending 0, pending 0, backlog 0, tasks 0
*None of the operation work*
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py xprt set
-h
usage: rpcctl.py xprt set [-h] --id ID [--dstaddr dstaddr] [--offline]
[--online] [--remove]
options:
-h, --help show this help message and exit
--id ID Id of a specific xprt to modify
--dstaddr dstaddr New dstaddr to set
--offline Set an xprt offline
--online Set an offline xprt back online
--remove Remove an xprt
[root@rrathore-upstream-sysfs nfs-utils]#
[root@rrathore-upstream-sysfs nfs-utils]#
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py xprt set
--id 3 --offline
[Errno 22] Invalid argument
[root@rrathore-upstream-sysfs nfs-utils]#
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py xprt set
--id 3 192.168.122.29 --offline
usage: rpcctl.py [-h] {client,switch,xprt} ...
rpcctl.py: error: unrecognized arguments: 192.168.122.29
[root@rrathore-upstream-sysfs nfs-utils]#
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py xprt set
--id 3 --dstaddr 192.168.122.29 --offline
[Errno 95] Operation not supported
[root@rrathore-upstream-sysfs nfs-utils]#
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py xprt set
--id 3 --dstaddr 192.168.122.29 --online
[Errno 95] Operation not supported
[root@rrathore-upstream-sysfs nfs-utils]#
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py xprt set
--id 3 --dstaddr 192.168.122.29 --remove
[Errno 95] Operation not supported
[root@rrathore-upstream-sysfs nfs-utils]#
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py xprt set
--id 1 --dstaddr 192.168.122.127 --offline
[Errno 22] Invalid argument
[root@rrathore-upstream-sysfs nfs-utils]#
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py xprt set
--id 1 --offline
[Errno 22] Invalid argument
5-* And it's similar If I do with switch*
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py switch
switch 0: xprts 1, active 1, queue 0
xprt 1: tcp, 192.168.122.127 [main]
switch 1: xprts 1, active 1, queue 0
xprt 0: local, /var/run/rpcbind.sock [main]
switch 2: xprts 1, active 1, queue 0
xprt 2: local, /var/run/gssproxy.sock [main]
switch 3: xprts 1, active 1, queue 0
xprt 3: tcp, 192.168.122.29 [main]
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py switch
set --id 3 --dstaddr 192.168.122.30
[Errno 95] Operation not supported
[root@rrathore-upstream-sysfs nfs-utils]#
[root@rrathore-upstream-sysfs nfs-utils]# ./tools/rpcctl/rpcctl.py switch
set --id 3 --dstaddr 192.168.122.29
[Errno 95] Operation not supported
Regards,
Rahul
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Screenshot from 2022-01-29 14-52-42.png
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