Hi,
Thanks for your response.
You mean NN will always try to maintain number of replicas as configured
even if one DN goes down and unable to come up?
Thanks
-OC
On Mon, Dec 9, 2013 at 8:18 PM, Daryn Sharp da...@yahoo-inc.com wrote:
To recover a NN, you probably want to use the HA feature.
Yes you are right. It will periodically checks the under replicated blocks
information and place those blocks on available data nodes if required.
Regards
Jitendra
On Wed, Dec 11, 2013 at 1:57 PM, oc tsdb oc.t...@gmail.com wrote:
Hi,
Thanks for your response.
You mean NN will always try
Hi,
Does NN log anywhere saying that 'one of DN is down and not reachable,so
replicating damaged DN data to another DN'?
Thanks
On Wed, Dec 11, 2013 at 2:10 PM, Jitendra Yadav
jeetuyadav200...@gmail.comwrote:
Yes you are right. It will periodically checks the under replicated blocks
Hi,
I am trying to understand,how to recover a Name node or Data node failure
in case if those nodes are unable to come up due to unexpected issues.
Is there a way to replace Name node with new name node without loosing
data.I mean new Name node should have all the data from original Name node.
To recover a NN, you probably want to use the HA feature. If not, try writing
your edits to a nfs volume in additional to the local fs.
There is no need to recover a DN. The NN compensates for a lost DN by using
the other remaining replicas to create a new replica on another DN.
Daryn
On
