try to restore a vm by nbd.
Backup was made by san tranport mode
performance is that bad on nbd .
how can i tune the performance?
NBD serves as a fallback when other transport modes are not available. The local area network (LAN) can be the production network or a dedicated backup network.
I have found that restore performance can be noticeably faster with HotAdd. Try configuring a VSA Proxy and restore using HotAdd Transport Mode.