Slow download speeds for google compute Windows instance

[Vishal Bhanderi]

Hello,

Currently we are running our services on AWS, we noticed that the web servers are pretty slow when users try to upload files and we are looking to move to Azure or GCE. 

I ran a simple test of downloading a 1GB file on servers in Azure, AWS and Azure. Both Amazon and GCE speeds seem to be similar. Azure is a least twice as fast for a similar spec machine. I understand that there will be variances due to location, time etc but wasn't expecting it to be this slow. Is there something I've missed? From what I read Google compute is meant to be much faster for I/O than AWS.

Test file used:

http://ipv4.download.thinkbroadband.com/1GB.zip

Windows 2016

n1-standard-1 (1 vCPU, 3.75 GB memory) - similar spec machines used for all Cloud instances

us-central1-c

GCE/AWS ~8 mins

Azure ~3 mins

Any advice on where I am going wrong would be great.

Vishal

[Mani Gandham]

> pretty slow when users try to upload files

Users uploading depends entirely on their internet connection and distance to the server. All the major cloud providers have plenty of bandwidth so that won't be the limitation.

Are all the VMs you tried in the same region? AWS doesn't have a central region in the US. You also need more standardized testing than a random file hosted by a service that isn't really designed for high speed throughput and is bound by whatever internet conditions might be happening.

Google does have the fastest networking available for all of it's VMs (although there are per-core egress caps and this also covers any persistent disk I/O since that uses the network). More info here: https://cloud.google.com/compute/docs/networks-and-firewalls#egress_throughput_caps

1 core = 2 gbits/sec = 250MB/sec of bandwidth so it should be plenty. I tried this file on a server in us-central-1b and it downloaded in less than a minute.