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Posted to hdfs-user@hadoop.apache.org by ch huang <ju...@gmail.com> on 2013/08/16 10:33:13 UTC
question about data block replicator number
hi,all:
if i have three data node, and data block replicator number is 2, one of
data node failed,so it's data block on it will move to another alive DN,the
replicator still be
3 ,what if the failed DN recover ,the replicator will become 4?
Re: question about data block replicator number
Posted by Jitendra Yadav <je...@gmail.com>.
Yup that's the responsibility of namenode to control under and over
replicated blocks automatically, However you can you balancer script any
time.
Thanks
On Fri, Aug 16, 2013 at 2:09 PM, bharath vissapragada <
bharathvissapragada1990@gmail.com> wrote:
> No, namenode deletes over-replicated blocks after some time.!
>
>
> On Fri, Aug 16, 2013 at 2:03 PM, ch huang <ju...@gmail.com> wrote:
>
>> hi,all:
>> if i have three data node, and data block replicator number is 2, one of
>> data node failed,so it's data block on it will move to another alive DN,the
>> replicator still be
>> 3 ,what if the failed DN recover ,the replicator will become 4?
>>
>
>
Re: question about data block replicator number
Posted by Jitendra Yadav <je...@gmail.com>.
Yup that's the responsibility of namenode to control under and over
replicated blocks automatically, However you can you balancer script any
time.
Thanks
On Fri, Aug 16, 2013 at 2:09 PM, bharath vissapragada <
bharathvissapragada1990@gmail.com> wrote:
> No, namenode deletes over-replicated blocks after some time.!
>
>
> On Fri, Aug 16, 2013 at 2:03 PM, ch huang <ju...@gmail.com> wrote:
>
>> hi,all:
>> if i have three data node, and data block replicator number is 2, one of
>> data node failed,so it's data block on it will move to another alive DN,the
>> replicator still be
>> 3 ,what if the failed DN recover ,the replicator will become 4?
>>
>
>
Re: question about data block replicator number
Posted by Jitendra Yadav <je...@gmail.com>.
Yup that's the responsibility of namenode to control under and over
replicated blocks automatically, However you can you balancer script any
time.
Thanks
On Fri, Aug 16, 2013 at 2:09 PM, bharath vissapragada <
bharathvissapragada1990@gmail.com> wrote:
> No, namenode deletes over-replicated blocks after some time.!
>
>
> On Fri, Aug 16, 2013 at 2:03 PM, ch huang <ju...@gmail.com> wrote:
>
>> hi,all:
>> if i have three data node, and data block replicator number is 2, one of
>> data node failed,so it's data block on it will move to another alive DN,the
>> replicator still be
>> 3 ,what if the failed DN recover ,the replicator will become 4?
>>
>
>
Re: question about data block replicator number
Posted by Jitendra Yadav <je...@gmail.com>.
Yup that's the responsibility of namenode to control under and over
replicated blocks automatically, However you can you balancer script any
time.
Thanks
On Fri, Aug 16, 2013 at 2:09 PM, bharath vissapragada <
bharathvissapragada1990@gmail.com> wrote:
> No, namenode deletes over-replicated blocks after some time.!
>
>
> On Fri, Aug 16, 2013 at 2:03 PM, ch huang <ju...@gmail.com> wrote:
>
>> hi,all:
>> if i have three data node, and data block replicator number is 2, one of
>> data node failed,so it's data block on it will move to another alive DN,the
>> replicator still be
>> 3 ,what if the failed DN recover ,the replicator will become 4?
>>
>
>
Re: question about data block replicator number
Posted by bharath vissapragada <bh...@gmail.com>.
No, namenode deletes over-replicated blocks after some time.!
On Fri, Aug 16, 2013 at 2:03 PM, ch huang <ju...@gmail.com> wrote:
> hi,all:
> if i have three data node, and data block replicator number is 2, one of
> data node failed,so it's data block on it will move to another alive DN,the
> replicator still be
> 3 ,what if the failed DN recover ,the replicator will become 4?
>
Re: question about data block replicator number
Posted by bharath vissapragada <bh...@gmail.com>.
No, namenode deletes over-replicated blocks after some time.!
On Fri, Aug 16, 2013 at 2:03 PM, ch huang <ju...@gmail.com> wrote:
> hi,all:
> if i have three data node, and data block replicator number is 2, one of
> data node failed,so it's data block on it will move to another alive DN,the
> replicator still be
> 3 ,what if the failed DN recover ,the replicator will become 4?
>
Re: question about data block replicator number
Posted by bharath vissapragada <bh...@gmail.com>.
No, namenode deletes over-replicated blocks after some time.!
On Fri, Aug 16, 2013 at 2:03 PM, ch huang <ju...@gmail.com> wrote:
> hi,all:
> if i have three data node, and data block replicator number is 2, one of
> data node failed,so it's data block on it will move to another alive DN,the
> replicator still be
> 3 ,what if the failed DN recover ,the replicator will become 4?
>
Re: question about data block replicator number
Posted by bharath vissapragada <bh...@gmail.com>.
No, namenode deletes over-replicated blocks after some time.!
On Fri, Aug 16, 2013 at 2:03 PM, ch huang <ju...@gmail.com> wrote:
> hi,all:
> if i have three data node, and data block replicator number is 2, one of
> data node failed,so it's data block on it will move to another alive DN,the
> replicator still be
> 3 ,what if the failed DN recover ,the replicator will become 4?
>