My primary namenode has the double hardware of the secondary namenode, is a good architecture???
I would recommend using Namenode HA (High Availability) rather than a secondary namenode. However, in a HA scenario the Namenode specs would be identical which would increases your total costs.
Hope it helps, Chris
Yes ill make Namenode HA (High Availability), but the active namenode will have more hardware that the stanby namenode, will be a problem???
Well, it depends mainly on the memory of standby namenode. Imagine the following scenario: If the active namenode fails, the standby namenode takes over very quickly because it has the latest state available in memory: both the latest edit logs entries and an up-to-date block mapping. That means the RAM should be more or less the same in both namenodes.
Actually my unique master has 12 cores and 47 gb ram y new machine will have 256 ram and 12 and 20 cors, it will be ok??