x27;d need to know more about your application.
john
From: rab ra [mailto:rab...@gmail.com]
Sent: Saturday, January 25, 2014 7:29 AM
To: user@hadoop.apache.org
Subject: RE: HDFS data transfer is faster than SCP based transfer?
The input files are provided as argument to a binary being executed b
HDFS to local disk? Can you read from
> HDFS directly using the FileSystem interface?
>
> john
>
>
>
> *From:* Shekhar Sharma [mailto:shekhar2...@gmail.com]
> *Sent:* Saturday, January 25, 2014 3:44 AM
> *To:* user@hadoop.apache.org
> *Subject:* Re: HDFS data trans
Subject: Re: HDFS data transfer is faster than SCP based transfer?
We have the concept of short circuit reads which directly reads from data node
which improve read performance. Do we have similar concept like short circuit
writes
On 25 Jan 2014 16:10, "Harsh J" mailto:ha...@cl
We have the concept of short circuit reads which directly reads from data
node which improve read performance. Do we have similar concept like short
circuit writes
On 25 Jan 2014 16:10, "Harsh J" wrote:
> There's a lot of difference here, although both do use TCP underneath,
> but do note that SC
There's a lot of difference here, although both do use TCP underneath,
but do note that SCP securely encrypts data but stock HDFS
configuration does not.
You can also ask SCP to compress data transfer via the "-C" argument
btw - unsure if you already applied that pre-test - it may help show
up som
WHEN u put the data or write into HDFS, 64kb of data is written on client
side and then it is pushed through pipeline and this process continue till
64mb of data is written which is the block size defined by the client.
While on the other hand scp will try to buffer the entire data. Passing
chunks
It is not a single file. Lot of small files. Files are stored in HDFS and
map operations copies required files from hdfs. One map process running in
one node only. Each file will be about 16MB
On 24 Jan 2014 23:49, "Vinod Kumar Vavilapalli"
wrote:
> Is it a single file? Lots of files? How big are
Is it a single file? Lots of files? How big are the files? Is the copy on a
single node or are you running some kind of a MapReduce program?
+Vinod
Hortonworks Inc.
http://hortonworks.com/
On Fri, Jan 24, 2014 at 7:21 AM, rab ra wrote:
> Hi
>
> Can anyone please answer my query?
>
> -Rab
> ---
