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AWS in 2025: Stuff you think you know that's now wrong

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171–180 of 284 posts

Re: AWS in 2025: Stuff you think you know that's now wrong

#171

Earlier quoted context omitted.

Gateway endpoints are free. Network endpoints (which are basically AWS-managed ENIs that can tunnel through VPC boundaries) are not free. S3 can use either, and we recommend establishing VPC Gateway endpoints by default whenever you need S3 access. (Disclaimer: I work for AWS, opinions are my own.)

Why don't you have gateway endpoints for all your APIs?

The service teams don’t talk to each other…

Re: AWS in 2025: Stuff you think you know that's now wrong

#172

> You don’t have to randomize the first part of your object keys to ensure they get spread around and avoid hotspots. From my understanding, I don't think this is completely accurate. But, to be fair, AWS doesn't really document this very well. From my (informal) conversations with AWS engineers a few months ago, it works approximately like this (modulo some details I'm sure the engineers didn't really want to share)…

Yep, this is still a thing. In the past year I’ve been throttled due to hot partitions. They’ve improved the partitioning so you hit it less, but if you scale too fast you will get limited.

Hit it when building an iceberg Lakehouse using pre existing data. Using object prefixes fixed the issue.

Re: AWS in 2025: Stuff you think you know that's now wrong

#173
post #150
post #136

Earlier quoted context omitted.

They probably are an LLM and if they aren't, their higher management is pushing for them to be LLMs by 2027 at the latest.

I still get strong Hyderabad vibes from the copy/pasting plus the occasional original sentence. Perhaps they trained the LLM using that data though. (Small customer though: yearly AWS spend around 80k. Support is 10% of that.)

TAMs are super hit and miss. We’ve had great ones (hi Nick!) and not so great ones. ($7-10M/mo customer AWS spend, support is a complicated sliding scale % of that, gogo ES!). Non-ES at smaller customers has been universally useless, except at quota increases.

Re: AWS in 2025: Stuff you think you know that's now wrong

#174
post #26

> You don’t have to randomize the first part of your object keys to ensure they get spread around and avoid hotspots. As of when? According to internal support, this is still required as of 1.5 years ago.

I think there is some nuance needed here. If you ask support to partition your bucket then they will be a bit annoying if you ask for specific partition points and the first part of the prefix is not randomised. They tried to push me to refactor the bucket first to randomise the beginning of the prefix, but eventually they did it.

The auto partitioning is different. It can isolate hot prefixes on its own and can intelligently pick the partition points. Problem is the process is slow and you can be throttled for more than a day before it kicks in.

Re: AWS in 2025: Stuff you think you know that's now wrong

#175

Earlier quoted context omitted.

In terms of cost, from cheapest to most expensive: 1. Spot with autoscaling to adjust to demand and a savings plan that covers the ~75th percentile scale 2. On-demand with RIs (RIs will definitely die some day) 3. On-demand with savings-plans (More flexible but more expensive than RIs) 3. Spot 4. On-demand I definitely recommend spot instances. If you're greenfielding a new service and you're not tied to AWS, some ot…

To "me, too" this, it's not like that AWS spot instance just go "poof," they do actually warn you (my recollection is 60s in advance of the TerminateInstance call), and so a resiliency plane on top of the workloads (such as the cited Kubernetes) can make that a decided "non-event". Shout out to the reverse uptime crew, a subset of Chaos Engineering

The spot termination warnings arrive 120 seconds before termination https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/spot-ins...

Re: AWS in 2025: Stuff you think you know that's now wrong

#176
This article was a relief. I’m always a tiny bit worried Amazon will change some thing drastically and I’ll have to migrate. I’ve had an ec2 instance running since 2013. It requires effectively zero maintenance. So I am glad there were no surprises in this article. Thanks OP.

Re: AWS in 2025: Stuff you think you know that's now wrong

#177

Earlier quoted context omitted.

It's designed to be a declarative DSL, but then you have to do all sorts of filters and maps in any group of resources and suddenly you are programming in yaml with both hands tied behind your back

Yeah it’s just terrible. If Amazon knew what was good they’d just replace it with almost anything else. Heck just got all in on terraform and call it a day.

Isn’t that what CDK was for?

Re: AWS in 2025: Stuff you think you know that's now wrong

#178

Earlier quoted context omitted.

Looks like something that you could solve easily through their support, no?

Support don't talk to you unless you pay for support

Yes, they do.

https://support.aws.amazon.com/#/contacts/one-support?formId...

Re: AWS in 2025: Stuff you think you know that's now wrong

#179

Can no longer login to my AWS account, because I never set up MFA. Want to set up MFA ... login required to request device. Yes, I know, they warned us far ahead of time. But not being able to request one of their MFA devices without a login is ... sucky.

Talk to support: https://support.aws.amazon.com/#/contacts/one-support?formId...

Re: AWS in 2025: Stuff you think you know that's now wrong

#180
post #7

S3: "Block Public Access is now enabled by default on new buckets." On the one hand, this is obviously the right decision. The number of giant data breeches caused by incorrectly configured S3 buckets is enormous. But... every year or so I find myself wanting to create an S3 bucket with public read access to I can serve files out of it. And every time I need to do that I find something has changed and my old recipe d…

They'll teach you how for $250 and a certification test...
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