Alerting and managing data storage system port overload due to host path failures

A system comprising:

• at least one processor;
• and
• at least one memory comprising code stored thereon that, when executed, performs a method of detecting and managing target port overloads comprising:
• receiving, from a host, registration commands sent from a plurality of initiators of the host to a plurality of target ports of a data storage system, wherein each of the registration commands sent from a corresponding one of the plurality of initiators of the host includes a host name uniquely identifying the host which sent said each registration command;
• subsequent to said receiving the registration commands, determining, by the data storage system using the host name for the host included in the registration commands, that the plurality of initiators are included in a same host, the host;
• receiving I/Os from the plurality of initiators of the host at the plurality of target ports of a data storage system;
• determining a plurality of initiator workloads for the plurality of initiators;
• determining a plurality of target workloads for the plurality of target ports;
• determining, by the data storage system, that a first of the plurality initiators of the host is a failed initiator that has stopped sending I/Os to the data storage system, wherein the first initiator has a first initiator workload of the plurality of initiator workloads;
• responsive to the data storage system determining that the first initiator of the host is a failed initiator, determining, by the data storage system in accordance with the first initiator workload, a plurality of revised target workloads for the plurality of target ports;
• determining, in accordance with plurality of revised target workloads, whether any of the plurality of target ports is expected to be overloaded;
• and
• responsive to determining that at least one of the plurality of target ports is expected to be overloaded, performing at least one corrective action to alleviate or reduce an overloaded workload condition expected for the at least one target port.

A non-transitory computer readable medium comprising code stored thereon that, when executed, performs a method of detecting and managing target port overloads comprising:

• receiving, from a host, registration commands sent from a plurality of initiators of the host to a plurality of target ports of a data storage system, wherein each of the registration commands sent from a corresponding one of the plurality of initiators of the host includes a host name uniquely identifying the host which sent said each registration command;
• subsequent to said receiving the registration commands, determining, by the data storage system using the host name for the host included in the registration commands, that the plurality of initiators are included in a same host, the host;
• receiving I/Os from the plurality of initiators of the host at the plurality of target ports of a data storage system;
• determining a plurality of initiator workloads for the plurality of initiators;
• determining a plurality of target workloads for the plurality of target ports;
• determining, by the data storage system, that a first of the plurality initiators of the host is a failed initiator that has stopped sending I/Os to the data storage system, wherein the first initiator has a first initiator workload of the plurality of initiator workloads;
• responsive to the data storage system determining that the first initiator of the host is a failed initiator, determining, by the data storage system in accordance with the first initiator workload, a plurality of revised target workloads for the plurality of target ports;
• determining, in accordance with plurality of revised target workloads, whether any of the plurality of target ports is expected to be overloaded;
• and
• responsive to determining that at least one of the plurality of target ports is expected to be overloaded, performing at least one corrective action to alleviate or reduce an overloaded workload condition expected for the at least one target port.