On 2020/9/30 下午1:12, Shivam Mehra wrote:
I came across this documentation with source code for providing
network buffering to applications
https://www.nfradead.org/~tgr/libnl/doc/api/route_2qdisc_2plug_8c_source.html
<https://www.infradead.org/~tgr/libnl/doc/api/route_2qdisc_2plug_8c_source.html>.
This network-buffering helps output-commit problem when providing
fault tolerance to virtual machines. The output is buffered until an
acknowledgement arrives from the backup VM and then released to the
external world. So that backup and primary VMs seem consistent
externally. Initially developed for XEN VMM to provide fault tolerance
to VMs and I think it's now available for |QEMU| too.
Where does the script reside which does network-buffering for
checkpoints? and what are the commands to make this happen?
I want to do this network-buffering for packets originating from an
application. Is it possible to do it in the same way as above? Does it
do any damage to the host kernel? Can I get a simple working example
for this?
Hi Shivam:
I haven't gone through the qdisc you mentioned, but it depends on a
specific host network setup to work if I understand correctly.
Qemu support a native HA (COLO) which has a buffer filter.
Cc Chen for more information.
Thanks
