Thanks Gao for the reply. I used the parallelism parameter with
different values like 6 and 8 but still the execution time is not
comparable with a single threaded python script. What would be the
reasonable value for the parallelism?
Best,
Habib
On 10/30/2019 1:17 PM, Zhenghua Gao wrote:
The reason might be the parallelism of your task is only 1, that's too
low.
See [1] to specify proper parallelism for your job, and the execution
time should be reduced significantly.
[1]
https://ci.apache.org/projects/flink/flink-docs-stable/dev/parallel.html
*Best Regards,*
*Zhenghua Gao*
On Tue, Oct 29, 2019 at 9:27 PM Habib Mostafaei
<ha...@inet.tu-berlin.de <mailto:ha...@inet.tu-berlin.de>> wrote:
Hi all,
I am running Flink on a standalone cluster and getting very long
execution time for the streaming queries like WordCount for a
fixed text
file. My VM runs on a Debian 10 with 16 cpu cores and 32GB of RAM. I
have a text file with size of 2GB. When I run the Flink on a
standalone
cluster, i.e., one JobManager and one taskManager with 25GB of
heapsize,
it took around two hours to finish counting this file while a simple
python script can do it in around 7 minutes. Just wondering what is
wrong with my setup. I ran the experiments on a cluster with six
taskManagers, but I still get very long execution time like 25
minutes
or so. I tried to increase the JVM heap size to have lower execution
time but it did not help. I attached the log file and the Flink
configuration file to this email.
Best,
Habib
--
Habib Mostafaei, Ph.D.
Postdoctoral researcher
TU Berlin,
FG INET, MAR 4.003
Marchstraße 23, 10587 Berlin
