Hi! We've tried to use network boot loading kernel and initramfs with http but we found this to be terribly slow. Our ~400Mb initramfs was loaded more then hour on 10Gbit/s network!
Googling around best I found was this redhat notice: https://access.redhat.com/solutions/1262653 (Installing RHEL 7 with GRUB2 HTTP is very slow or timeouts.) Although it is written there that: "It's a known issue that in heavy network traffic. The GRUB2 HTTP protocol is very slow and risks timeout failures.", I failed to find any bugreport on that. The best I found is the following bug report: http://savannah.gnu.org/bugs/?49531 but as far as I understand this should not cause such dramatic slowdown in single http connection. So is this really known? What causes this? Are there any workarounds? Relevant part of our configuration: insmod http set root='(http)' menuentry 'Gentoo Linux' { linux /kernel initrd /initramfs } -- Peter.
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