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-Original Message-
From: hadoop hive [mailto:hadooph...@gmail.com]
Sent: 02 February 2012 12:29
To: common-user@hadoop.apache.org
Subject: Re: Reduce > copy at 0.00 MB/s
Hey ,
Can any1 help me w
Hey ,
Can any1 help me with this, i have increases the reduce slowstart to .25
but its still hangs after copy .
tell me what else i can change it to make it working fine.
regards
Vikas Srivastava
On Wed, Jan 25, 2012 at 7:45 PM, praveenesh kumar wrote:
> Yeah , I am doing it, currently its on 2
Yeah , I am doing it, currently its on 20 %, I guess I have to raise it
more.
Funny thing is, its still happening after map is 100% completed.
when map is completed, it should not wait, right. But I see it still give
same message, for some time.
Thanks,
Praveenesh
On Wed, Jan 25, 2012 at 7:29 PM,
The copy phase fetches the map outputs. It may hang for a while if
there are no newly completed map outputs to fetch yet.
You can raise your reducers' slowstart value to have it not spend so
many cycles waiting but rather start at 80-90% of map completions,
instead of default 5%. This helps your M
this problem arise after adding a node , so then i start balancer to make
it balance ,
On Wed, Jan 25, 2012 at 4:38 PM, praveenesh kumar wrote:
> @hadoophive
>
> Can you explain more by "balance the cluster" ?
>
> Thanks,
> Praveenesh
>
> On Wed, Jan 25, 2012 at 4:29 PM, hadoop hive wrote:
>
> >
@hadoophive
Can you explain more by "balance the cluster" ?
Thanks,
Praveenesh
On Wed, Jan 25, 2012 at 4:29 PM, hadoop hive wrote:
> i face the same issue but after sumtime when i balanced the cluster the
> jobs started running fine,
>
> On Wed, Jan 25, 2012 at 3:34 PM, praveenesh kumar >wrot
i face the same issue but after sumtime when i balanced the cluster the
jobs started running fine,
On Wed, Jan 25, 2012 at 3:34 PM, praveenesh kumar wrote:
> Hey,
>
> Can anyone explain me what is reduce > copy phase in the reducer section ?
> The (K,List(V)), is passed to the reducer. Is reduce
Hey,
Can anyone explain me what is reduce > copy phase in the reducer section ?
The (K,List(V)), is passed to the reducer. Is reduce > copy representing
copying of K,List(V) on the reducer from all mappers ?
I am monitoring my jobs on the cluster, using Jobtracker url.
I am seeing for most of my
