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From Greg Hogan <c...@greghogan.com>
Subject Re: S3 checkpointing in AWS in Frankfurt
Date Wed, 23 Nov 2016 15:29:14 GMT
Hi Jonathan,

Which S3 storage class are you using? Do you have a breakdown of the S3
costs as storage / API calls / early deletes / data transfer?

Greg

On Wed, Nov 23, 2016 at 2:52 AM, Jonathan Share <jon.share@gmail.com> wrote:

> Hi,
>
> I'm interested in hearing if anyone else has experience with using Amazon
> S3 as a state backend in the Frankfurt region. For political reasons we've
> been asked to keep all European data in Amazon's Frankfurt region. This
> causes a problem as the S3 endpoint in Frankfurt requires the use of AWS
> Signature Version 4 "This new Region supports only Signature Version 4"
> [1] and this doesn't appear to work with the Hadoop version that Flink is
> built against [2].
>
> After some hacking we have managed to create a docker image with a build
> of Flink 1.2 master, copying over jar files from the hadoop
> 3.0.0-alpha1 package and this appears to work, for the most part but we
> still suffer from some classpath problems (conflicts between AWS API used
> in hadoop and those we want to use in out streams for interacting with
> Kinesis) and the whole thing feels a little fragile. Has anyone else tried
> this? Is there a simpler solution?
>
> As a follow-up question, we saw that with checkpointing on three
> relatively simple streams set to 1 second, our S3 costs were higher than
> the EC2 costs for our entire infrastructure. This seems slightly
> disproportionate. For now we have reduced checkpointing interval to 10
> seconds and that has greatly improved the cost projections graphed via
> Amazon Cloud Watch, but I'm interested in hearing other peoples experience
> with this. Is that the kind of billing level we can expect or is this a
> symptom of a mis-configuration? Is this a setup others are using? As we are
> using Kinesis as the source for all streams I don't see a huge risk with
> larger checkpoint intervals and our Sinks are designed to mostly tolerate
> duplicates (some improvements can be made).
>
> Thanks in advance
> Jonathan
>
>
> [1] https://aws.amazon.com/blogs/aws/aws-region-germany/
> [2] https://issues.apache.org/jira/browse/HADOOP-13324
>

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