Using an IOS it is possible to configure a archive that is held in RAM or configation changes writen to flash:

Configuration:

conf t
!
archive
 log config
  logging enable
  logging size 1000
  hidekeys
!
end
wr

Show archive configuration commands hold in the memory:

R1# show archive log config all

On a NX-OS device an archive is not needed to be configured. The command to show the configuration archive:

R2#show accounting log | i configure