Fault tolerant system shared system resource with state machine logging
First Claim
1. A file server performing file transaction operations in response to file transaction requests by the clients and including a state machine logging mechanism, comprising:
- a storage sub-system, anda control/processing sub-system includinga file system processor performing file transaction operations in response to client requests and controlling file storage operations of the storage sub-system, anda state machine logging mechanism operating concurrently and cooperative with the file system processor, includinga state machine log generator for extracting sequential state machine information defining a corresponding sequence of state machines during an execution of an operation, the sequence of state machines representing sequential states of execution of a file transaction wherein a state machine is comprised of state information including control and data values representing a state of operation of the control/processing sub-system during a corresponding step in the execution of the file transaction, whereinthe control/processing sub-system is a state machine system defined during the execution of a step in the execution of an operation by a sequential state machine defined by a state of operation of the state machine system during the step in the execution of the operation, and whereina file transaction operation is represented by a sequence of state machines wherein each state machine is defined by data and control values residing in the state machine system during existence of a state machine of the sequence, anda state machine log for storing the state machine information, wherein the state machine log generator is responsive to the restoration of operation of the file server after a failure of file server operations for reading the state machine information from the state machine log and restoring the state of execution of a file transaction.
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Accused Products
Abstract
A system and method for logging and restoring the state of execution of resource transactions in a shared system resource by logging and restoration of state machine information. Each state machine logging mechanism includes a state machine log generator for extracting state machine information and generating and storing a state machine log. The resource may include dual, concurrently operating control/processing subsystems and may include corresponding functionally integral but physically separate state machine log mirroring mechanisms for receiving and restoring mirror copies of the state machine information.
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Citations
16 Claims
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1. A file server performing file transaction operations in response to file transaction requests by the clients and including a state machine logging mechanism, comprising:
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a storage sub-system, and a control/processing sub-system including a file system processor performing file transaction operations in response to client requests and controlling file storage operations of the storage sub-system, and a state machine logging mechanism operating concurrently and cooperative with the file system processor, including a state machine log generator for extracting sequential state machine information defining a corresponding sequence of state machines during an execution of an operation, the sequence of state machines representing sequential states of execution of a file transaction wherein a state machine is comprised of state information including control and data values representing a state of operation of the control/processing sub-system during a corresponding step in the execution of the file transaction, wherein the control/processing sub-system is a state machine system defined during the execution of a step in the execution of an operation by a sequential state machine defined by a state of operation of the state machine system during the step in the execution of the operation, and wherein a file transaction operation is represented by a sequence of state machines wherein each state machine is defined by data and control values residing in the state machine system during existence of a state machine of the sequence, and a state machine log for storing the state machine information, wherein the state machine log generator is responsive to the restoration of operation of the file server after a failure of file server operations for reading the state machine information from the state machine log and restoring the state of execution of a file transaction. - View Dependent Claims (2)
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3. A file server performing file transaction operations in response to file transaction requests by the clients and including a state machine logging mechanism, comprising:
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a storage sub-system, and first and second control/processing sub-systems operating concurrently and in parallel, each including a file system processor performing file transaction operations in response to client requests directed to the first and second control/processing sub-systems and controlling file storage operations of the storage sub-system, and a state machine logging mechanism operating concurrently and cooperatively with the file system processor, including a state machine log generator for extracting state machine information defining a sequence of state machines during an execution of an operation, each state machine representing a current state of execution of a step in the execution of a file transaction by the corresponding control/processing sub-system wherein a state machine is comprised of state information including control and data values representing a state of operation of the control/processing sub-system during a corresponding step in the execution of a file transaction, wherein each control/processing sub-system is a state machine system defined during the execution of an operation by a sequence of state machines defined by states of operation of the state machine system during corresponding steps in the execution of the operation, and wherein a file transaction operation is represented by at least a sequence of state machines wherein each state machine is defined by data and control values residing in the state machine system during existence of state machine of the sequence, and a state machine log for storing the state machine information of the corresponding control/processing sub-system, wherein the state machine log generator is responsive to the restoration of operation of the file server after a failure of the corresponding control/processing sub-system for reading the state machine information from the corresponding state machine log and restoring the state of execution of a file transaction of the corresponding control/processing sub-system. - View Dependent Claims (4)
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5. A system resource performing system resource operations in response to requests by the clients and including a state machine logging mechanism, comprising:
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a system resource-sub-system, and a control/processing sub-system including a resource control processor performing system resource operations in response to client requests and controlling operations of the system resource sub-system, and a state machine logging mechanism operating concurrently and cooperatively with the control/processing sub-system, including a state machine log generator for extracting state machine information defining a sequence of state machines during an execution of an operation, each state machine representing a current state of execution of a corresponding step in the execution of a system resource operation wherein a state machine is comprised of state information including control and data values representing a state of operation of the control/processing sub-system during a corresponding step in the execution in the system resource operation, wherein the control/processing sub-system is a state machine system defined during the execution of an operation by a sequence of state machines defined by corresponding states of operation of the state machine system during corresponding steps in the execution of the operation, and wherein a resource operation is represented by a sequence of state machines wherein each state machine is defined by data and control values residing in the state machine system during existence of a state machine of the sequence, and a state machine log for storing the state machine information, wherein the state machine log generator is responsive to the restoration of operation of the system resource after a failure of system resource operations for reading the state machine information from the state machine log and restoring the state of execution of a system resource operation. - View Dependent Claims (6)
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7. A system resource performing system resource operations in response to system resource requests by the clients and including a state machine logging mechanism, comprising:
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a system resource sub-system, and first and second control/processing sub-systems operating concurrently and in parallel, each including a system processor performing system resource operations in response to client requests directed to the first and second control/processing sub-systems and controlling operations of the system resource sub-system, and a state machine logging mechanism operating concurrently and cooperatively with the control/processing sub-system, including a state machine log generator for extracting state machine information defining a sequence of state machines during an execution of an operation, each state machine representing a state of execution of a corresponding step in the execution of a system resource operation of the corresponding control/processing sub-system wherein a state machine is comprised of state information including control and data values representing a state of operation of the control/processing sub-system during the corresponding step in the execution of the system resource operation, wherein each control/processing sub-system is a state machine system defined during the execution of an operation by a sequence of state machines defined by a state of operation of the state machine system during a step in the execution of the operation, and wherein a system resource operation is represented by a sequence of state machines wherein each state machine is defined by data and control values residing in the state machine system during existence of a state machine of the sequence of state machines, and a state machine log for storing the state machine information of the corresponding control/processing sub-system, wherein the state machine log generator is responsive to the restoration of operation of the system resource after a failure of the corresponding control/processing sub-system for reading the state machine information from the corresponding state machine log and restoring the state of execution of a system resource operation of the corresponding control/processing sub-system. - View Dependent Claims (8)
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9. A state machine logging mechanism for use in a system resource performing system resource operations in response to requests by the clients, the system resource including a system resource sub-system and a control/processing sub-system including a resource control processor performing system resource operations in response to client requests and controlling operations of the system resource sub-system, the state machine logging mechanism comprising:
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a state machine log generator operating concurrently and cooperatively with the control/processing sub-system for extracting state machine information defining a sequence of state machines during an execution of an operation, state machine representing a current state of execution of a step in the execution of a system resource operation wherein a state machine is comprised of state information including control and data values representing a state of operation of the control/processing sub-system during execution of the corresponding step in the execution of the system resource operation, and a state machine log for storing the state machine information, wherein the state machine log generator is responsive to the restoration of operation of the system resource after a failure of system resource operations for reading the state machine information from the state machine log and restoring the state of execution of a system resource operation wherein the control/processing sub-system is a state machine system defined during the execution of an operation by a sequence of state machines defined by corresponding states of operation of the state machine system during a step in the execution of the operation, and wherein a file transaction operation is represented by a sequence of state machines wherein each state machine is defined by data and control values residing in the state machine system during existence of the corresponding state machine of the sequence of state machines. - View Dependent Claims (10)
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11. A state machine logging mechanism for use in a system resource performing system resource operations in response to system resource requests by the clients, the system resource including a system resource sub-system and first and second control/processing sub-systems, each including a system processor performing system resource operations in response to client requests directed to the first and second control/processing sub-systems and controlling operations of the system resource sub-system, the state machine logging mechanism comprising:
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in each control/processor sub-system, a state machine log generator for extracting state machine information defining a sequence of states machine during an execution of an operation, each state machine representing a state of execution of a step in the execution of a system resource operation of the corresponding control/processing sub-system wherein a state machine is comprised of state information including control and data values representing a state of operation of the control/processing sub-system during execution of the corresponding step in the execution of an operation, and a state machine log operating concurrently and cooperatively with the corresponding control/processing sub-system for storing the state machine information of the corresponding control/processing sub-system, wherein the state machine log generator is responsive to the restoration of operation of the system resource after a failure of the corresponding control/processing sub-system for reading the state machine information from the corresponding state machine log and restoring the state of execution of a system resource operation of the corresponding control/processing sub-system, wherein each control/processing sub-system is a state machine system defined during the execution of an operation by a sequence of state machines defined by a state of operation of the state machine system during a step in the execution of the operation, and wherein a file transaction operation is represented by a sequence of states machine wherein each state machine is defined by data and control values residing in the state machine system during existence of the state machine of the sequence of state machines. - View Dependent Claims (12)
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13. In a system resource performing system resource operations in response to requests by the clients, the system resource including a system resource sub-system and a control/processing sub-system including a resource control processor performing system resource operations in response to client requests and controlling operations of the system resource sub-system and including a state machine logging mechanism, a method for logging and restoring the state of execution of system resource operations, comprising the steps of:
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during each system resource operation, extracting state machine information defining a sequence of state machines during an execution of an operation, each state machine representing a current state of execution of a corresponding step in an execution of a system resource operation wherein a state machine is comprised of state information including control and data values representing a state of operation of the control/processing sub-system during the corresponding step in the execution of the system resource operation, and storing the state machine information, and upon restoration of operation of the system resource after a failure of system resource operations, reading the state machine information from the state machine log and restoring the state of execution of a system resource operation, wherein the control/processing sub-system is a state machine system defined during the execution of an operation by a sequence of state machines defined by states of operation of the state machine system during corresponding steps in the execution of the operation, and wherein a file transaction operation is represented by at least one sequential state machine wherein each state machine is defined by data and control values residing in the state machine system during existence of state machine of the sequence. - View Dependent Claims (14)
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15. In a system resource performing system resource operations in response to system resource requests by the clients, the system resource including a system resource sub-system and first and second control/processing sub-systems, each including a system processor performing system resource operations in response to client requests directed to the first and second control/processing sub-systems and controlling operations of the system resource sub-system, a method for logging and restoring the state of execution of system resource operations, comprising the steps of:
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in each control/processor sub-system, during each system resource operation, extracting state machine information defining a sequence of state machines during an execution of an operation, each state machine representing a current state of execution of a step in an execution of a system resource operation of the corresponding control/processing sub-system wherein a state machine is comprised of state information including control and data values representing a state of operation of the control/processing sub-system during a corresponding step in the execution of the system resource operation, and storing the state machine information of the corresponding control/processing sub-system, and upon restoration of operation of the system resource after a failure of the corresponding control/processing sub-system, reading the state machine information and restoring the state of execution of a system resource operation of the corresponding control/processing sub-system, wherein each control/processing sub-system is a state machine system defined during the execution of an operation by a sequence of state machines defined by corresponding states of operation of the state machine system during corresponding steps in the execution of the operation, and wherein a file transaction operation is represented by a sequence of state machines wherein each state machine is defined by data and control values residing in the state machine system during existence of a state machine of the sequence of state machines. - View Dependent Claims (16)
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Specification