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From Leonid Fedotov <lfedo...@hortonworks.com>
Subject Re: Read namenode data from primary memory
Date Tue, 14 May 2013 07:43:31 GMT
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 <nhsandeep6@gmail.com>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 <nitinpawar432@gmail.com>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 <nhsandeep6@gmail.com>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 <nitinpawar432@gmail.com>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 <nhsandeep6@gmail.com>wrote:
>>>>
>>>>> Withuot going to safemode can't we get the Namespace ??
>>>>>
>>>>>
>>>>> On Tue, May 14, 2013 at 12:18 PM, Ling Kun <lkun.erlv@gmail.com>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 <
>>>>>> adityaexalter@gmail.com> 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
>

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