Re: How can I prove ....

Posted by amir bahmanyari on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/How-can-I-prove-tp9113p9140.html

Hi Again & sorry to take your time. But am puzzled by what I cannot explain why.

The parallelism is set to 448. There are 112 tasks per TM. 

Why is Flink NOT allocating ALL 448 slots? It allocates only 1/2 of it.

I also bumped up the # buffers to equate a 2GiB in each TM & see no difference :-(

So I incremented my total-slots = 448. Kafka topic also has 448 partitions.

Why am I having such a bad luck with this!!!!!!!??? LOL!!

Thanks for your attention Aljoscha.

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From: amir bahmanyari <[hidden email]>
To: Aljoscha Krettek <[hidden email]>; User <[hidden email]>
Sent: Thursday, September 22, 2016 10:10 AM
Subject: Re: How can I prove ....

Hi Again, following is from the dashboard while wverything is supposedlt running.

No real-time change in send/received/#of records...but one node is definitely producing a *.out file...

And all TMs are reporting in their *.log files. And the process will eventually end , but very slow.

Thanks again Aljoscha.

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From: amir bahmanyari <[hidden email]>
To: Aljoscha Krettek <[hidden email]>; User <[hidden email]>
Sent: Thursday, September 22, 2016 9:16 AM
Subject: Re: How can I prove ....

Thanks Aljoscha,

Thats why I am wondering about this. I dont see send/receive columns change at all....just 0's all the time.

The only thing that changes is time stamp.

Is this an indication that the nodes in the cluster are not participating in execution of the data?

Thanks again.

Amir-

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From: Aljoscha Krettek <[hidden email]>
To: amir bahmanyari <[hidden email]>; User <[hidden email]>
Sent: Thursday, September 22, 2016 5:01 AM
Subject: Re: How can I prove ....

Hi,

depending on the data source you might not be able to stress CPU/MEM because the source might be to slow. As long as you see the numbers increasing in the Flink Dashboard for all operators you should be good.

Cheers,

Aljoscha

On Thu, 22 Sep 2016 at 00:26 amir bahmanyari <[hidden email]> wrote:

That all nodes in a Flink Cluster are involved simultaneously in processing the data?

Programmatically, graphically...

I need to stress CPU , MEM and all resources to their max.

How can I guarantee this is happening in Flink Cluster?

Out of 4 nodes, this is the highest resource usage I see from "top"...

Everything else is not even close...

t

op - 22:22:45 up 41 days,  2:39,  1 user,  load average: 1.76, 1.55, 1.28

Tasks: 344 total,   1 running, 343 sleeping,   0 stopped,   0 zombie

%Cpu(s):  5.4 us,  1.0 sy,  0.0 ni, 93.5 id,  0.1 wa,  0.0 hi,  0.0 si,  0.0 st

KiB Mem:  11551564+total, 65702020 used, 49813632 free,   115072 buffers

KiB Swap:        0 total,        0 used,        0 free.  3148420 cached Mem

I am pretty sure I can push FlinkRunner to way more extent than this....

And thats where true realistic perf numbers start showing up.

Thanks+regards,

Amir-