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MapReduce, mail # user - Read namenode data from primary memory


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Re: Read namenode data from primary memory
Nitin Pawar 2013-05-14, 07:01
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 Tue, May 14, 2013 at 12:27 PM, Sandeep Nemuri <[EMAIL PROTECTED]>wrote:

> Withuot going to safemode can't we get the Namespace ??
>
>
> On Tue, May 14, 2013 at 12:18 PM, Ling Kun <[EMAIL PROTECTED]> wrote:
>
>> 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 2:37 PM, Aditya exalter <[EMAIL PROTECTED]>wrote:
>>
>>> Hi,
>>>
>>>      How to get the namenode data(edits and fsimage) from the main
>>> memory(RAM)
>>>
>>>
>>>
>>>
>>>
>>
>>
>> --
>> http://www.lingcc.com
>>
>
>
>
> --
> --Regards
>   Sandeep Nemuri
>

--
Nitin Pawar