System and method for increasing write performance in a fibre channel environment

• US 6,356,944 B1
• Filed: 03/31/1997
• Issued: 03/12/2002
• Est. Priority Date: 03/31/1997
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Compaq Computer Corporation (HP Inc.)
• Inventors: McCarty, James F.
• Primary Examiner(s): Rinehart, Mark H.
• Assistant Examiner(s): KANG, PAUL H
• Application Number:
  US08/828,672
• Time in Patent Office: 1,807 Days
• Field of Search: 395/449, 395/200.29, 709/233, 709/251, 709/237, 709/226, 709/222, 709/227, 709/250, 709/232, 370/906
• US Class Current: 709/222
• CPC Class Codes: G06F 13/126 and has means for transferring I/O instructions and statuses between control unit and main processor
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/26 Special purpose or proprietary protocols or architectures network applications for proprietary or special purpose networking environments H04L67/12

Abstract

A system with a plurality of devices compatible with the Fiber Channel Protocol, with at least one initiator/originator and one target/responder. The initiator/originator is provided with the capability to send both data and command frames to the target/responder to increase write performance. The target/responder allocates a portion of its Responder-Exchange-Identifiers for the write use of the initiator/originator, which manages the use of these identifiers.

Claims

1. In a Fibre Channel (FC) communication environment, which environment inlcudes two or more originators and at least one responder, a method for transferring data from said originator to said responder, comprising steps of:

sending a write command and at least one data frame together from said two or more originators to said responder;

transmitting a status frame from said responder to said originator, wherein said status frame is provided in response to the completion of said sending step;

dynamically allocating a plurality of selected portions of a Responder-Exchange-Identifier (RX_ID) index associated with said responder, said index comprising a plurality of Responder-Exchange-Identifiers (RX_Ids), each of the plurality of selected portions of the Responder-Exchange-Identifiers being allocated to a respective originator; and

transmitting information to said originators, said information being related to said plurality of selected portions.

2. The method as recited in claim 1, wherein said transmitting step is effectuated via a portion of a payload associated with a frame provided by said responder.

3. A system for transferring data in a Fibre Channel (FC) communication environment, comprising:

two or more originators for initiating a transfer of data; and

a responder for receiving said data,

wherein said respondent dynamically allocates a plurality of selected portions of a plurality of Responder-Exchange-Identifiers for the exclusive use of said two or more originators pursuant to said transfer of said data such that said two or more originators can send command and data frames together to said responder.

4. The system as recited in claim 3, wherein said two or more originators comprise a means for managing the use of said selected portions of said plurality of Responder-Exchange-Identifiers.

5. The system as recited in claim 3, wherein said two or more originators comprise an Originator-Exchange-Identifier (OX_ID) index.

6. The system as recited in claim 5, wherein a portion of said OX_ID index is associated with said plurality of selected portions of said plurality of Responder-Exchange-Identifiers.

7. The system as recited in claim 3, wherein the use of said plurality of selected portions of said plurality of Responder-Exchange-Identifiers is managed by said originator.

8. A method for increasing write performance in a Fibre Channel Arbitrated Loop, comprising of:

dynamically allocating a plurality of selected portions of a plurality of Responder-Exchange-Identifiers in a target for the exclusive use of two or more initiators;

transmitting information to said two or more initiators, said information being related to said plurality of Responder-Exchange-Identifiers;

sending COMMAND and DATA frames together from said two or more initiators, to said target, said frames being tagged with a Responder-Exchange-Identifier belonging to said plurality of selected portions; and

transmitting a STATUS frame from said target to said two or more initiators, indicating the completion of said sending step.

9. The method as recited in claim 8, further comprising the step of associating a portion of a plurality of Originator-Exchange-Identifiers in said two or more initiators with said selected portion of said plurality of Responder-Exchange-Identifiers.

10. The method as recited in claim 8, further comprising the step of managing the use of said selected portion of said plurality of Responder-Exchange-Identifiers by said two or more initiators.

11. A method of dynamically allocating resources in a Fibre Channel environment, comprising the acts of:

(a) providing a Fibre Channel loop comprising one or more originators and two or more targets, each initiator comprising a plurality of resources;

(b) initializing the originators and the targets;

(c) determining the number of targets capable of communicating with a originator;

(d) re-initializing the loop; and

(e) allocating a portion of a Responder-Exchange-Identifier index for use by a single originator.

12. The method, as set forth in claim 11, wherein act (c) comprises the act of sending a PLOGI frame from each target to the originator, wherein the PLOGI frame comprises embedded information regarding fast write capabilities of the target.