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Increase AWS pagination size #2009

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tjamet
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@tjamet tjamet commented Mar 12, 2021

From measurements, AWS by default has pagination of 100 items per
page when listing hosted zone resources.

This increases the number of requests required to list all our zones,
and pushes a hard constraint on the rate limits.

From the experiments, it seems that on the server-side, there is a hard
limit of 300 elements per page, as per AWS documentation:
https://docs.aws.amazon.com/Route53/latest/APIReference/API_ListResourceRecordSets.html

ListResourceRecordSets returns up to 300 resource record sets at a time in ASCII order,
beginning at a position specified by the name and type elements

Hence raising the page size from 100 to 300 items would decrease by 3
the number of requests posted to Route53

We even set a higher limit so we can benefit from a lower number of
requests if ever AWS increases the hard limit of 300.

contributes to improving #1293

Checklist

  • Unit tests updated
  • End user documentation updated

I didn't find a place where to update the documentation

From measurements, AWS by default has pagination of 100 items per
page when listing hosted zone resources.

This increases the number of requests required to list all our zones,
and pushes a hard constraint on the rate limits.

From the experiments, it seems that on the server-side, there is a hard
limit of 300 elements per page, as per AWS documentation:
https://docs.aws.amazon.com/Route53/latest/APIReference/API_ListResourceRecordSets.html

> ListResourceRecordSets returns up to 300 resource record sets at a time in ASCII order,
> beginning at a position specified by the name and type elements

Hence raising the page size from 100 to 300 items would decrease by 3
the number of requests posted to Route53

We even set a higher limit so we can benefit from a lower number of
requests if ever AWS increases the hard limit of 300.
@k8s-ci-robot k8s-ci-robot added cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. size/S Denotes a PR that changes 10-29 lines, ignoring generated files. labels Mar 12, 2021
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tjamet commented Mar 12, 2021

/assign @Raffo

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@tjamet I have one comment, if addressed I'm happy to merge this.

// when less items are returned, and still paginate accordingly.
// As we are using the standard AWS client, this should already be compliant.
// Hence, ifever AWS decides to raise this limit, we will automatically reduce the pressure on rate limits
MaxItems: aws.String("1000"),
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I would prefer having this as 300 as it's the limit now.

I would also love to see a constant declared for that instead of a magic number string.

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done :D

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Raffo commented Mar 25, 2021

/approve
/lgtm

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Mar 25, 2021
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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Raffo, tjamet

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@k8s-ci-robot k8s-ci-robot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Mar 25, 2021
@k8s-ci-robot k8s-ci-robot merged commit 10d0ee1 into kubernetes-sigs:master Mar 25, 2021
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3 participants