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MapReduce >> mail # user >> Read namenode data from primary memory


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Re: Read namenode data from primary memory
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 <[EMAIL PROTECTED]>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 12:31 PM, Nitin Pawar <[EMAIL PROTECTED]>wrote:
>
>> 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
>>
>
>
>
> --
> --Regards
>   Sandeep Nemuri
>

--
Nitin Pawar