Feature pages are design documents that developers have created while collaborating on oVirt.

Most of them are outdated, but provide historical design context.

They are not user documentation and should not be treated as such.

Documentation is available here.



Scale: Replace the use of a process pool with ioprocess written in C.


Current status

  • Target Release: 3.5
  • Status: Released in oVirt 3.5

Benefit to oVirt

The advantage of this implementation is that it’s lightweight and scalable.

Detailed Description

Currently we use a single process (‘Remote File Handler’) for each I/O request to remote storage (NFS). We want to replace the use of ‘Remote File Handler’ with ioprocess. Ioprocess is a C implementation providing a single process that can serve multiple I/O requests.


The change is planned to occur in two phases.

Phase 1: A single ioprocess will replace the existing process pool and the storage side will be exposed to the same interface and configuration, only the underlying implementation will change.

Phase 2: A single ioprocess will serve a single storage domain. Out of process interface to storage will change and expose the actual ioprocess and its new file handling functions implementation.