For the specification, we can find it in below documentation:
http://support.huawei.com/hedex/hdx.do?docid=EDOC1000139844&lang=en&idPath=7919749|7941815|21430818|21462748|21122033
in the part "Product Specifications --Software Specifications "
for different storage, it is different.
for example, for 5500 V3, the maximum mapping views is 4095
maximum LUN is 8192.
and it didn't mention about the 1 host group can support how many mapping views, but if there is only one host group, theoretically, it can have 4095 mapping views, however, of course, I didn't add so many in a real environment.
mapping view support how many LUNs, it is similar, theoretically it can support 8192.
and about how many host group and hosts, the answer is clear:
A host can be added to a maximum of 64 host groups. A host group can be added with a maximum of 64 hosts
we can find this specification in documentation. "Basic Storage Service Configuration Guide for Block > Managing Basic Storage Services > Managing Host Groups >adding hosts"
http://support.huawei.com/hedex/hdx.do?docid=EDOC1000139844&id=host_group_info_modify&text=Adding%252520a%252520Host&lang=en