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Posted to user@flink.apache.org by M Singh <ma...@yahoo.com> on 2019/11/24 21:50:46 UTC
Apache Flink - Throttling stream flow
Hi:
I have an Flink streaming application that invokes some other web services. However the webservices have limited throughput. So I wanted to find out if there any recommendations on how to throttle the Flink datastream so that they don't overload the downstrream services. I am using Kinesis as source and sink in my application.
Please let me know if there any hooks available in Flink, what are the patterns that can be used and what are the best practices/pitfalls for using them.
Thanks
Mans
Re: Apache Flink - Throttling stream flow
Posted by Rong Rong <wa...@gmail.com>.
Hi Mans,
is this what you are looking for [1][2]?
--
Rong
[1] https://issues.apache.org/jira/browse/FLINK-11501
[2] https://github.com/apache/flink/pull/7679
On Mon, Nov 25, 2019 at 3:29 AM M Singh <ma...@yahoo.com> wrote:
> Thanks Ciazhi & Thomas for your responses.
>
> I read the throttling example but want to see if that work with a
> distributed broker like Kinesis and how to have throttling feedback to the
> Kinesis source so that it can vary the rate without interfering with
> watermarks, etc.
>
> Thanks again
>
> Mans
>
>
> On Monday, November 25, 2019, 05:55:21 AM EST, Thomas Julian <
> thomasjulian@zoho.com> wrote:
>
>
> related
>
> https://issues.apache.org/jira/browse/FLINK-13792
>
> Regards,
> Julian.
>
>
> ---- On Mon, 25 Nov 2019 15:25:14 +0530 *Caizhi Weng
> <tsreaper96@gmail.com <ts...@gmail.com>>* wrote ----
>
> Hi,
>
> As far as I know, Flink currently doesn't have a built-in throttling
> function. You can write your own user-defined function to achieve this.
> Your function just gives out what it reads in and limits the speed it gives
> out records at the same time.
>
> If you're not familiar with user-defined functions, see
> https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/udfs.html
>
> Here is a throttling iterator example:
> https://github.com/apache/flink/blob/master/flink-examples/flink-examples-streaming/src/main/java/org/apache/flink/streaming/examples/utils/ThrottledIterator.java
>
> M Singh <ma...@yahoo.com> 于2019年11月25日周一 上午5:50写道：
>
> Hi:
>
> I have an Flink streaming application that invokes some other web
> services. However the webservices have limited throughput. So I wanted to
> find out if there any recommendations on how to throttle the Flink
> datastream so that they don't overload the downstrream services. I am
> using Kinesis as source and sink in my application.
>
> Please let me know if there any hooks available in Flink, what are the
> patterns that can be used and what are the best practices/pitfalls for
> using them.
>
> Thanks
>
> Mans
>
>
>
>
Re: Apache Flink - Throttling stream flow
Posted by M Singh <ma...@yahoo.com>.
Thanks Ciazhi & Thomas for your responses.
I read the throttling example but want to see if that work with a distributed broker like Kinesis and how to have throttling feedback to the Kinesis source so that it can vary the rate without interfering with watermarks, etc.
Thanks again
Mans
On Monday, November 25, 2019, 05:55:21 AM EST, Thomas Julian <th...@zoho.com> wrote:
related
https://issues.apache.org/jira/browse/FLINK-13792
Regards,
Julian.
---- On Mon, 25 Nov 2019 15:25:14 +0530 Caizhi Weng <ts...@gmail.com> wrote ----
Hi,
As far as I know, Flink currently doesn't have a built-in throttling function. You can write your own user-defined function to achieve this. Your function just gives out what it reads in and limits the speed it gives out records at the same time.
If you're not familiar with user-defined functions, see https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/udfs.html
Here is a throttling iterator example: https://github.com/apache/flink/blob/master/flink-examples/flink-examples-streaming/src/main/java/org/apache/flink/streaming/examples/utils/ThrottledIterator.java
M Singh <ma...@yahoo.com> 于2019年11月25日周一 上午5:50写道：
Hi:
I have an Flink streaming application that invokes some other web services. However the webservices have limited throughput. So I wanted to find out if there any recommendations on how to throttle the Flink datastream so that they don't overload the downstrream services. I am using Kinesis as source and sink in my application.
Please let me know if there any hooks available in Flink, what are the patterns that can be used and what are the best practices/pitfalls for using them.
Thanks
Mans
Re: Apache Flink - Throttling stream flow
Posted by Thomas Julian <th...@zoho.com>.
related
https://issues.apache.org/jira/browse/FLINK-13792
Regards,
Julian.
---- On Mon, 25 Nov 2019 15:25:14 +0530 Caizhi Weng <ts...@gmail.com> wrote ----
Hi,
As far as I know, Flink currently doesn't have a built-in throttling function. You can write your own user-defined function to achieve this. Your function just gives out what it reads in and limits the speed it gives out records at the same time.
If you're not familiar with user-defined functions, see https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/udfs.html
Here is a throttling iterator example: https://github.com/apache/flink/blob/master/flink-examples/flink-examples-streaming/src/main/java/org/apache/flink/streaming/examples/utils/ThrottledIterator.java
M Singh <ma...@yahoo.com> 于2019年11月25日周一 上午5:50写道：
Hi:
I have an Flink streaming application that invokes some other web services. However the webservices have limited throughput. So I wanted to find out if there any recommendations on how to throttle the Flink datastream so that they don't overload the downstrream services. I am using Kinesis as source and sink in my application.
Please let me know if there any hooks available in Flink, what are the patterns that can be used and what are the best practices/pitfalls for using them.
Thanks
Mans
Re: Apache Flink - Throttling stream flow
Posted by Caizhi Weng <ts...@gmail.com>.
Hi,
As far as I know, Flink currently doesn't have a built-in throttling
function. You can write your own user-defined function to achieve this.
Your function just gives out what it reads in and limits the speed it gives
out records at the same time.
If you're not familiar with user-defined functions, see
https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/udfs.html
Here is a throttling iterator example:
https://github.com/apache/flink/blob/master/flink-examples/flink-examples-streaming/src/main/java/org/apache/flink/streaming/examples/utils/ThrottledIterator.java
M Singh <ma...@yahoo.com> 于2019年11月25日周一 上午5:50写道：
> Hi:
>
> I have an Flink streaming application that invokes some other web
> services. However the webservices have limited throughput. So I wanted to
> find out if there any recommendations on how to throttle the Flink
> datastream so that they don't overload the downstrream services. I am
> using Kinesis as source and sink in my application.
>
> Please let me know if there any hooks available in Flink, what are the
> patterns that can be used and what are the best practices/pitfalls for
> using them.
>
> Thanks
>
> Mans
>