Libvirt supports FD-based live migrations in the form of tunnelled
migrations. However, this isn't as performant as of now, since it
involves extra copies.ยท
This patchset proposes adding support for externally provided file
descriptors for live migration. By allowing the client to supply the
migration FD directly, the extra copy can be avoided, improving overall
migration performance.
The intent is to gather early feedback on the approach and its
feasibility. Comments, concerns, and suggestions are very welcome :)
V2:
1. Removed the approach of introducing a new FD passing API and instead
reuse the virDomainFDAssociate API along with a dummy VM on the destination
host.
2. Introduced a new virDomainMigrate parameter, VIR_MIGRATE_PARAM_FD_SET.
Tejus GK (2):
qemu: support incoming "fd" uri
qemu: add support for fd based live migrations
include/libvirt/libvirt-domain.h | 14 +++
src/qemu/qemu_driver.c | 24 +++--
src/qemu/qemu_migration.c | 174 +++++++++++++++++++++++++------
src/qemu/qemu_migration.h | 3 +
4 files changed, 178 insertions(+), 37 deletions(-)
--
2.43.7
