• On the client and on the MDS
  • lctl set_param mgc.*.dynamic_nids=1
  • lctl get_param mgc.*.dynamic_nids
    • Check the value is 1

• On the client and on the MDS
  
  • lctl set_param mgc.*.dynamic_nids=0
  • lctl get_param mgc.*.dynamic_nids
    • Check the value is 0

• Setup a file system consistent of:
  • 1 node: MGS/MDS
  • 1 node: OSS should have 2 IP addresses
  • 1 node: Client
• Mount the File System and the client
  • Use only one of the IP addresses on the OSS
• Enable the dynamic_nids feature on both the MDS and the client
• Write multiple files to the FS
• Read back the files and make sure they are correct
• unmount the OSS and remove lustre modules
• Change the OSS configuration to use the other IP address for NID
• load lustre on the OSS and re mount
• LS the file system.
  • We should get the exact same list of files
• Write more files and read them back.
  • the write/read operation should succeed

• Setup a file system consistent of:
  • 1 node: MGS/MDS
  • 2 node: OSS each with at least 1 IP address
  • 1 node: Client
• Mount the File System and the client
  • Ensure you have a shared drive between both OSS nodes
  • setup one OSS as the primary
  • mount the OSS without specifying the failover OSS NID
• Enable the dynamic_nids feature on both the MDS and the client
• Write multiple files to the FS
• Read back the files and make sure they are correct
• unmount the primary OSS and remove lustre modules
• load the lustre modules on the second OSS and mount the second OSS
• LS the file system.
  • We should get the exact same list of files
• Write more files and read them back.
  • the write/read operation should succeed

• Setup a file system consistent of:
  • 1 node: MGS/MDS
  • 1 node: OSS should have 2 IP addresses
  • 1 node: Client
• Mount the File System and the client
  • Use only one of the IP addresses on the OSS
• Disable the dynamic_nids feature on both the MDS and the client
• Write multiple files to the FS
• Read back the files and make sure they are correct
• unmount the OSS and remove lustre modules
• Change the OSS configuration to use the other IP address for NID
• load lustre on the OSS and re mount
• LS the file system.
  • the metadata might be cached on the client and the LS could work
• Writing to the FS should timeout and fail.

LU-10360-06,

LU-10360-07

• Repeat the above test twice
  • dynamic nids enabled on the MDS
    • feature should remain disabled.
  • dynamic nids enabled on the client only
    • feature should remain disabled.

test_dynamic_nids_05.py

test_dynamic_nids_04.py