Difference and relations between hosts and mappings

0

Differences and relations between hosts and mappings:
FAQ-What Are the Differences and Relations Between Hosts and Mappings

Other related questions:
Difference between the V3 storage host and mapping
A host is the virtual host created on the ISM interface and can be regarded as a logical application server. By configuring an initiator, you can establish connections between the virtual host and physical application server. Mapping is the relationship established between a host and a created LUN for an application server to use the storage space provided by a storage device.

For V3 series unified storage V300R001, how can I query the mapping relationship between LUNs and hosts?
For V3 series unified storage systems V300R001, you can obtain the information about LUNs and its mapped hosts from the mapping view. You can identify the corresponding relationship between storage systems' hosts and their connected application servers in the live network through parameters such as host names and host operating systems. You are advised to use a host name that is easy for you to recognize the host's corresponding application server. For details about how to view mapping views, see Viewing Mapping View Information.

Difference between reinstalling a host and restoring a cluster
If some nodes (non-management nodes) in a cluster are faulty, you can reinstall the hosts, and restore the cluster after the new nodes are installed. If the installation directory of a cluster node (non-management node) is deleted by mistake, you can use the cluster restoration function to restore it. Reinstallation and restoration of non-management nodes are supported.

Differences between bit transparent mapping and MAC transparent mapping
Bit transparent mapping (11.1G): 10GE LAN client-side signals are mapped into OTU2e signals by increasing the OTU frame frequency. This mapping method guarantees a desired FEC coding gain and correction capability. However, this method generates a line rate of 11.1 Gbit/s, which is higher than the standard rate of OTU2 signals. MAC transparent mapping (10.7G): 10GE LAN client-side signals are encapsulated using the GFP-F method and are mapped into OTU2 signals using 10GE MAC frames. This mapping method guarantees a desired FEC coding gain and correction capability and generates a line rate of 10.71 Gbit/s. Bit transparent mapping (10.7G): 10GE LAN client-side signals are mapped into OTU2e signals by occupying some FEC areas of standard OTU frames. This method makes some FEC areas be occupied to transmit signals, which weakens the FEC/AFEC coding gain and error correction capability. As a result, the rate of line-side signals is 10.71 Gbit/s.

What is the difference between NAT server and static NAT
The difference between the NAT server and static NAT is as follows: The NAT server changes only the address but not the port number when an internal device accesses the external network. The device enabled with static NAT changes the IP address and port number when an internal device accesses the external network.

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top