Method and apparatus for controlling a computational storage processor

A method of controlling a computational storage system, the computational storage system including a first computational storage processor (CSP) connected to a first host and a second CSP that is remote to the first CSP, the first CSP comprising a plurality of first submission queues (SQs), a plurality of first computational storage functions (CSFs), a first CSF controller, and a first CSP controller, and the second CSP comprising a plurality of second SQs, a plurality of second CSFs, a second CSF controller and a second CSP controller, wherein the first CSF controller is connected to the second CSF controller via a network, the method comprising:

• receiving at one of the plurality of the first SQs of the first CSP, a first submission queue entry (SQE) written by the first host and directed to the first CSF controller;
• directing the first SQE to the first CSF controller;
• determining, by the first CSF controller, that one of the second CSFs included on the second CSP is configured to perform an operation associated with the first SQE;
• directing, by the first CSF controller, the first SQE to the second CSF controller included on the second CSP;
• determining, by the secondary CSF controller, for each of one or more operations associated with the first SQE, a CSF of the plurality of second CSFs configured to perform that operation;
• generating, by the second CSF controller, one or more secondary SQEs based on the first SQE, wherein each of the one or more secondary SQEs relates to one of the one or more operations associated with the first SQE and is directed to the determined one of the plurality of second CSFs configured to perform that operation;
• writing, by the second CSF controller, the one or more secondary SQEs to one of the plurality of second SQs;
• directing each of the one or more secondary SQEs to the associated one of the plurality of second CSFs that the secondary SQE is directed to;
• for each of the one or more secondary SQEs, performing, by the associated one of the plurality of second CSFs, an operation associated the secondary SQE.

A computational storage processor (CSP) connected to a host, the CSP comprising:

• a plurality of submission queues (SQs);
• a plurality of computational storage functions (CSFs);
• a CSF controller;
• and
• a CSP controller;
• wherein the CSP controller is configured to direct to the CSF controller a first submission queue entry (SQE) that is written to a first one of the plurality of SQs and is directed to the CSF controller;
• wherein the CSF controller is configured to:
• determine, for each of one or more operations associated with the first SQE, a CSF of the plurality of CSFs configured to perform that operation;
• generate one or more secondary SQEs based on the first SQE, wherein the one or more secondary SQEs are not included in the first SQE and each of the one or more secondary SQEs relates to one of the one or more operations associated with the first SQE and is directed the determined one of the CSFs;
• and
• write the one or more secondary SQEs to a second one of the plurality of SQs;
• and
• wherein the CSP controller is further configured to direct each of the one or more secondary SQEs to the associated one of the CSFs that the secondary SQE is directed to such that, for each one the one or more secondary SQEs, the associated one of the CSFs performs the operation associated the secondary SQE.

A computational storage system comprising:

• a first computational storage processor (CSP) connected to a first host, the first CSP comprising:
• a plurality of first submission queues (SQs);
• a plurality of first computational storage functions (CSFs);
• a first CSF controller;
• and
• a first CSP controller;
• and
• a second CSP that is remote to the first CSP, the second CSP comprising:
• a plurality of second SQs;
• a plurality of second CSFs;
• a second CSF controller;
• and
• a second CSP controller, wherein the first CSF controller is connected to the second CSF controller via a network;
• wherein the first CSP controller is configured to direct to the first CSF controller a first submission queue entry (SQE) written by the first host to one of the plurality of first SQs and is directed to the first CSF controller;
• wherein the first CSF controller is configured to:
• determine that one of the second CSFs included on the second CSP is configured to perform an operation associated with the first SQE;
• and
• direct the first SQE to the second CSF controller included on the second CSP;
• wherein the second CSF controller is configured to:
• determine, for each of one or more operations associated with the first SQE, a CSF of the plurality of second CSFs configured to perform that operation;
• generate one or more secondary SQEs based on the first SQE, wherein each of the one or more secondary SQEs relates to one of the one or more operations associated with the first SQE and is directed to the determined one of the plurality of second CSFs configured to perform that operation;
• and
• write the one or more secondary SQEs to one of the plurality of second SQs;
• wherein the second CSP controller is configured to direct each of the one or more secondary SQEs to the associated one of the plurality of second CSFs that the secondary SQE is directed to such that, for each of the one or more secondary SQEs, the associated one of the plurality of second CSFs perform the operation associated the secondary SQE.