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5/
Problems (4):
- reliable UDP multicast: AWS seems not to support UDP multicast, while GC does not. Anyway what's the expected packet loss?
- security: spectre attacks, data hosted on 3rd party, ...
- #crypto is growing. When next bull run? How to ensure 10x/100x scalability
6/
Path to metal 
Our infra team has outstanding experience in secure, god wrath resistant, deployments, so we discussed a lot about pros and cons.
Here are the 2 cons summarized:
- hardware decay
- physical hosts maintenance (trips to datacenter, hardware expertise, ...)
7/
Benefit (1):
- the entire infra behavior is predictable
- RAID enabled historical sharded data-warehouses kick asses
- KYD, KYM and KYC 
: Know Your Disk, Know your Mem and Know Your CPU
- dedicated switches and firewalls, back to back connectivity for core servers
8/ Benefit (2): - reliable UDP multicast - bare-metal Linux installs - you're the only one using your CPU (see spectre-like attacks) - colocation services offering
Out of curiosity, what provider do you use for the bare metal?
We rented our own cabinets in a datacenter and bought our own servers
I've always been a fan of dedicated servers but the cost2efficiency equation usually doesn't make sense for the most part.. the latency and routing also adds another layer of problems to the issue which is why I switched to GC personally.. Anyway good job!
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