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