+ IoImpl& set_disk(resource::DiskImpl* disk);
+ IoImpl& set_host(s4u::Host* host);
+ s4u::Host* get_host() const { return host_; }
+ IoImpl& set_dst_disk(resource::DiskImpl* disk);
+ IoImpl& set_dst_host(s4u::Host* host);
+ s4u::Host* get_dst_host() const { return dst_host_; }
+
+ IoImpl& update_sharing_penalty(double sharing_penalty);