Rate limit on IO operations per process/user in ext4?

Question

Extended file system

Dear Khabrovites!
Since IO often becomes a bottleneck in the system, and processes are very gluttonous to the disk, it became necessary to set a speed limit for IO operations with the hard disk for the process / user.
What tools can implement such limitation?
OS: Ubuntu 12.04.3 LTS
FS: ext4
I remember exactly that about a month or two ago I met the necessary article on Habré, but now something is not found in any way (
Thanks in advance!

Answer 1

Habr: local compilation without lags
Habr: Working with KVM virtual machines. Limiting Virtual Machine Resources
Full Dive: Linux: Documentation/cgroups/blkio-controller.txt