Data migration techniques

A computer readable medium comprising code stored thereon that, when executed, performs a method of performing data migration comprising:

• receiving, on a source data storage system from a host, first one or more registration commands;
• determining, on the source data storage system, a first host registration table including a first corresponding entry for the host, wherein the first corresponding entry identifies first one or more initiators of the host that sent the first one or more registration commands to the source data storage system;
• receiving, on a target data storage system, host information including a list of one or more hosts that are identified in the first host registration table of the source data storage system as registered on the source data storage system, wherein the list of the host information identifies the host as registered on the source data storage system, wherein data is migrated for one or more logical devices from the source data storage system to the target data storage system;
• issuing second one or more registration commands from the host to the target data storage system;
• determining, at the target data storage system in accordance with the second one or more registration commands, a second host registration table including a second corresponding entry for the host, the second corresponding entry denoting a host name for the host and second one or more initiators of the host that sent the one or more registration commands to the target data storage system, wherein the second one or more initiators of the host are different from the first one or more initiators of the host;
• determining a masking view for the host on the target data storage system, the masking view including an initiator group of the second one or more initiators of the host that sent the second one or more registration commands from the host to the target data storage system, wherein the masking view is used by the target data storage system to determine whether to service received I/O operations;
• and
• using the host information to perform verification processing that ensures hosts registered on the source data storage system have also registered on the target data storage system.

A system comprising:

• one or more processors;
• and
• one or more memories comprising code stored thereon that, when executed by at least a first of the one or more processors, performs a method of data migration comprising:
• receiving, on a source data storage system from a host, first one or more registration commands;
• determining, on the source data storage system, a first host registration table including a first corresponding entry for the host, wherein the first corresponding entry identifies first one or more initiators of the host that sent the first one or more registration commands to the source data storage system;
• receiving, on a target data storage system, host information including a list of one or more hosts that are identified in the first host registration table of the source data storage system as registered on the source data storage system, wherein the list of the host information identifies the host as registered on the source data storage system, wherein data is migrated for one or more logical devices from the source data storage system to the target data storage system;
• issuing second one or more registration commands from the host to the target data storage system;
• determining, at the target data storage system in accordance with the second one or more registration commands, a second host registration table including a second corresponding entry for the host, the second corresponding entry denoting a host name for the host and second one or more initiators of the host that sent the one or more registration commands to the target data storage system, wherein the second one or more initiators of the host are different from the first one or more initiators of the host;
• determining a masking view for the host on the target data storage system, the masking view including an initiator group of the second one or more initiators of the host that sent the second one or more registration commands from the host to the target data storage system, wherein the masking view is used by the target data storage system to determine whether to service received I/O operations;
• and
• using the host information to perform verification processing that ensures hosts registered on the source data storage system have also registered on the target data storage system.