On Saturday, October 28, 2017 3:10 AM,  Guan Junxiong wrote:

Does it mean some extra works such as:
1) showing the path topology of nvme multipath device

Isn't connection to the target suppose guide the host to the shortest and f=
astest path available path or so called most optimized path. Sysfs entry ca=
n easily store that as we store path related info over there.=20

2) daemon to implement immediate and delayed failback

This is also based on target, whenever target is ready for immediate or del=
ayed failback it will let the connect from host succeed. Until then host is=
 in reconnecting state across all path until it finds an optimized or un-op=
timized path. Why is this extra daemon needed ?
=20

4) grouping paths besides ANA

Why we cannot use NS Group here.

Would be good idea to move away from legacy way of doing things for NVME de=
vices. NVME Multipath implementation by Christoph is very simple. How about=
 not making it super complicated. =20

Best regards,
Anish