JN is the journalnode. You have to use it for HA. Like zookeeper, you
need odd numbers of JN.
Anyway ZKFC is neccessary too for automatic failover.
On 2014.11.06. 9:45, Oleg Ruchovets wrote:
Our deployment is 15 data nodes and 2 NN. ZKs installed also as part
of hortonworks distributions.
Sorry for dummy question - what is JN is?
Can you please please point me on some manual wiki for installation /
configuration.
Thanks
Oleg.
On Thu, Nov 6, 2014 at 4:04 PM, Alexander Pivovarov
<[email protected] <mailto:[email protected]>> wrote:
2 boxes for 2 NNs (better dedicated boxes)
min 3 JNs
min 3 ZKs
JNs and ZKs can share boxes with other services
On Wed, Nov 5, 2014 at 11:31 PM, Oleg Ruchovets
<[email protected] <mailto:[email protected]>> wrote:
Hello.
We are using hortonwork distribution and want to evaluate HA
capabilities.
Can community please share the best practices and potential
problems?
Is it required additional hardware?
Thanks
Oleg.
