Nitin,
You have the whole bunch of problems to answer/resolve
Let me have some research first, then we can discuss the problem...
Thank you !
Leonid
On Tue, May 14, 2013 at 12:43 AM, Nitin Pawar wrote:
> if you want to use savenamespace then yes.
>
> Normally to have a backup copy of the F
If you're looking to tail the metadata changes for analysis purposes,
there's a more pluggable approach available in 2.x versions.
If you're looking to backup the metadata outside of NameNode, I'd
suggest ditching such an approach and using 2.x's HA HDFS mode
instead.
On Tue, May 14, 2013 at 12:0
if you want to use savenamespace then yes.
Normally to have a backup copy of the FSImage, previously there was a
secondary namenode and now there is checkpoint NN. SNN was deprecated but
later it was undeprecated
the sole purpose of checkpoint NN is to have an rolling copy of the NN
based on inte
What is the reason?
Could you explain in more details, what do you want to accomplish?
Leonid.
On Tue, May 14, 2013 at 12:27 AM, Sandeep Nemuri wrote:
> Done Lets say 8hrs !!
> now every 8hrs do we need to go into safemode ?
>
>
> On Tue, May 14, 2013 at 12:53 PM, Nitin Pawar wrote:
>
>> every
Done Lets say 8hrs !!
now every 8hrs do we need to go into safemode ?
On Tue, May 14, 2013 at 12:53 PM, Nitin Pawar wrote:
> every 5 minutes seems too much.
>
> why not do a daily or say 8 hours basis
>
>
> On Tue, May 14, 2013 at 12:51 PM, Sandeep Nemuri wrote:
>
>> I Agree with you Nitin ..
>>
every 5 minutes seems too much.
why not do a daily or say 8 hours basis
On Tue, May 14, 2013 at 12:51 PM, Sandeep Nemuri wrote:
> I Agree with you Nitin ..
> My Requirement is i want to copy the edits and fsimage from memory for
> every 5mins. How does this works ?
>
>
> On Tue, May 14, 2013 at
I Agree with you Nitin ..
My Requirement is i want to copy the edits and fsimage from memory for
every 5mins. How does this works ?
On Tue, May 14, 2013 at 12:31 PM, Nitin Pawar wrote:
> if you do not put namenode in safemode that means your namenode can still
> accept request to write or delete
if you do not put namenode in safemode that means your namenode can still
accept request to write or delete files from hdfs. This may cause your
snapshot to be a problematic in case you want to restore from it. Safemode
is just an ensuring point that you have a standstill image to snapshot.
On
Withuot going to safemode can't we get the Namespace ??
On Tue, May 14, 2013 at 12:18 PM, Ling Kun wrote:
> Hi Aditya:
>This command line may help you:
>
> hadoop dfsadmin --saveNamespace
>
> you should firstly perform it in safe mode.
>
> The corresponding design and implemen
Hi Aditya:
This command line may help you:
hadoop dfsadmin --saveNamespace
you should firstly perform it in safe mode.
The corresponding design and implementation is described here:
https://issues.apache.org/jira/browse/HADOOP-4826
yours,
Ling Kun
On Tue, May 14, 2013 at 2:
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