Hi Genies,
I have a small doubt that hdfs read operation is parallel or sequential
process. Because from my understanding it should be parallel but if I read
"hadoop definitive guide 4" in anatomy of read it says "*Data is streamed
from the datanode back **to the client, which calls read() repeate
Hi,
I am importing data from RDBMS to hadoop using sqoop but my RDBMS data is
multi valued and contains "," special character.
So, While importing data using sqoop into hadoop ,sqoop by default it
separate the columns by using "," character. Is there any property through
which we can customize thi
There are two new counters, MAP_PHYSICAL_MEMORY_BYTES_MAX and
REDUCE_PHYSICAL_MEMORY_BYTES_MAX that give you the max value for map and
reduce respectively.
Thanks,
Miklos
On Wed, Apr 5, 2017 at 6:37 PM, Aaron Eng wrote:
> An important consideration is the difference between the RSS of the JVM
>
An important consideration is the difference between the RSS of the JVM process
vs. the used heap size. Which of those are you looking for? And also,
importantly, why/what do you plan to do with that info?
A second important consideration is the length of time you are at/around your
max RSS/ja