What are Amazon AWS vCPUs?

Sam Rueby Amazon Web Services 0 Comments

I was really surprised to find this. I was trying to get an idea of the difference in performance between my current m1.large instances and the new m3.large instances. First, I used to CPU-Z to see what it detected. Okay we’ve got: An Xeon E5-2650 running at a detected 1.8 Ghz 2 CPU cores with 1 thread each. Next I …

Updating GRUB in Ubuntu Amazon EC2 Instance

Sam Rueby Amazon Web Services 1 Comment

Twice now I’ve updated packages on my Ubuntu Amazon EC2 instance which is based-on the linux-ubuntu-12.04.4-x86_64-hvm-ebs AMI and have been presented with this scary message. The GRUB boot loader was previously installed to a disk that is no longer present, or whose unique identifier has changed for some reason. It is important to make sure that the installed GRUB core …