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0 pointsoutworlder8y ago0 comments

Whatever GCP has is rock-solid and often superior to AWS.

For example: when AWS encounters non-catastrophic issues with their hypervisor, you are on the hook for moving the instances away (meaning stop-start, or termination and relaunch for instance store). Depending on the instance type, this can cause service disruption.

GCP will transparently migrate the VM while it is running for you. You never see it, you customers don't either.

Same for networking: if you use their "premium" network, you can have anycast IPs to the closest POP, which will route traffic on Google's Network, not the open internet. AWS does not have anything close to this, the closest is multi-region VPC peering, without the fancy routing.

AWS offers more features though, which could be important if you require them.

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stephengillie8y ago· 2 in thread

> GCP will transparently migrate the VM while it is running for you. You never see it, you customers don't either.

This is just hot-migration between hosts. It "stuns" a VM for a fraction of a second - very high performance databases and videogame servers will sometimes notice, while everything else just sees a spot of lag and keeps going.

AWS are an odd cloud vendor who don't support many common cloud features:

- No hot migrate between hosts.

- No hot-add RAM or CPU.

- No memory-state snapshot, only disk snapshot.

- No arbitrary CPU or RAM quantities, only "t-shirt" sizes - can't build servers in "nonsensical" configurations like 12 CPUs and 1GB RAM, or 1 CPU and 128 GB RAM.

This is on top of having arbitrary separators in their data centers, so they send you strange messages about having to delete and rebuild your servers in the same data center. AWS may think it's cute to sell different "areas" in their data center, but the way to have redundancy for servers in AWS us-east-1 is to have servers Azure US West 2 or GCP us-central-1.

Like early iOS in the smartphone space, AWS are dominant in the VM space through marketing, not features.

cthalupa8y ago

>AWS may think it's cute to sell different "areas" in their data center

https://aws.amazon.com/about-aws/global-infrastructure/

From re:invent presentations, we know that even availability zones might be made up of multiple datacenters. In 2014, James Hamilton's presentation said that one of the AZs in us-east-1 had 6 separate datacenters.

I don't think it's really accurate to say AWS is selling us different 'areas of a datacenter' when we know that AZs are not only not sharing a datacenter, but might be multiple datacenters themselves.

stephengillie8y ago

From a certain point of view, it's Amazon using different terminology - what others call a data center, they call an AZ...or even a subset of an AZ, and we'll never know exactly - nor the capacity of each[0]. And what they call a data center, others call a region.

[0] When a server class is "sold out" in a region, you can't start your server - but there's no indication of this anywhere until you try to start your server. Other cloud providers auto-rebalance VMs to make space - using AWS is sometimes more like using physical servers than VMs - maybe moreso with paravirtualization.

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ti_ranger8y ago

> Whatever GCP has is rock-solid and often superior to AWS.

A number of global outages in various network-related APIs or features on GCP in the past year says otherwise. I don't think there has been any global or even multi-region outage at AWS in many many years, the biggest recent outage for S3 in one region (us-east-1) impacted the internet more than any of the (~3) global outages at GCP and some other recent ones at Azure.

> For example: when AWS encounters non-catastrophic issues with their hypervisor, you are on the hook for moving the instances away (meaning stop-start, or termination and relaunch for instance store).

Apparently this is only for older instance types.

> GCP will transparently migrate the VM while it is running for you. You never see it, you customers don't either.

If you never see it from GCP, how do you know AWS doesn't do it for more recent instance types?

> Same for networking: if you use their "premium" network, you can have anycast IPs to the closest POP, which will route traffic on Google's Network, not the open internet.

There may be good reasons for this ...

sudhirj8y ago

The AWS equivalent of Anycast / closest region is to route all traffic through Cloudfront. That way users enter the AWS fiber within 50ms (sometimes 5ms) and have SSL terminated there as well. Only works for HTTP(S) traffic, though, not general networking.

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