We ran a 100-petabyte cluster with all Meltdown/Spectre mitigation turned off because there was no foreign code running on it that didn't have access to the data itself.
It's all about the threat model. Engineers at the company were considered trusted actors and they were the only ones permitted to connect. If that layer failed, there is no way cache invalidation errors would be the fastest way in.
It's all about the threat model. Engineers at the company were considered trusted actors and they were the only ones permitted to connect. If that layer failed, there is no way cache invalidation errors would be the fastest way in.