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


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Re: Read namenode data from primary memory
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 <[EMAIL PROTECTED]>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 <[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
>

--
--Regards
  Sandeep Nemuri