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From Harsh J <ha...@cloudera.com>
Subject Re: Backup NameNode metadata in HA configuration
Date Tue, 04 Feb 2014 02:00:43 GMT
Hi,

You'll ideally just need the latest
fsimage file, which includes the whole check pointed namespace, so
"hdfs dfsadmin -fetch" is appropriate.

On Tue, Feb 4, 2014 at 3:02 AM, Ivan Tretyakov
<itretyakov@griddynamics.com> wrote:
> Does anybody can comment 'copying NN metadata directory' vs 'hdfs dfsadmin
> -fetch', using NN HA configuration?
>
>
> On Fri, Jan 31, 2014 at 8:26 PM, Ivan Tretyakov
> <itretyakov@griddynamics.com> wrote:
>>
>> Hi!
>>
>> We are using following version of Hadoop software: 2.0.0-cdh4.1.1.
>>
>> HDFS HA configuration is applied.
>>
>> I would like to ask if there are any difference or possible side effects
>> of backing up namenode data directory.
>>
>> It is ok to just copy NN data directory from active NN to another host,
>> what about standby NN?
>> Or it may NN metadate can be in inconsistent state?
>> Is there any advantages of using "hdfs dfsadmin -fetch <file>" command?
>>
>> --
>> Best Regards
>> Ivan Tretyakov
>>
>> Deployment Engineer
>> Grid Dynamics
>> +7 812 640 38 76
>> Skype: ivan.v.tretyakov
>> www.griddynamics.com
>> itretyakov@griddynamics.com
>
>
>
>
> --
> Best Regards
> Ivan Tretyakov
>
> Deployment Engineer
> Grid Dynamics
> +7 812 640 38 76
> Skype: ivan.v.tretyakov
> www.griddynamics.com
> itretyakov@griddynamics.com



-- 
Harsh J

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