Method, electronic device and computer program product for dual-processor storage system
In accordance with certain techniques, at a first processor of a dual-processor storage system, a change in an initial logical unit corresponding to a storage area in a physical storage device of the storage system is detected. Based on the change in the initial logical unit, a plurality of update operations to be performed on a mapped logical unit driver mapping a plurality of initial logical units including the initial logical unit to a plurality of mapped logical units are determined. An indication of the plurality of update operations is sent to a second processor of the storage system, to cause the second processor to perform the plurality of update operations on a peer mapped logical unit driver associated with the mapped logical unit driver.
1. A computer-implemented method, comprising:
detecting, at a first processor of a dual-processor storage system, a change in an initial logical unit corresponding to a storage area in a physical storage device of the storage system;
determining, based on the change in the initial logical unit, a plurality of update operations to be performed on a mapped logical unit driver mapping a plurality of initial logical units including the initial logical unit to a plurality of mapped logical units; and
sending an indication of the plurality of update operations to a second processor of the storage system, to cause the second processor to perform the plurality of update operations on a peer mapped logical unit driver associated with the mapped logical unit driver;
wherein determining the plurality of update operations to be performed on the mapped logical unit driver comprises:
determining a pool to which the initial logical unit belongs;
determining a plurality of mapped logical unit objects in the pool; and
determining the plurality of update operations based on the plurality of mapped logical unit objects.
2. The method of claim 1 , wherein detecting the change in the initial logical unit comprises:
determining that at least one of a state or an attribute of the initial logical unit changes.
3. The method of claim 1 , wherein determining the plurality of update operations based on the plurality of mapped logical unit objects comprises:
for each of the plurality of mapped logical unit objects,
indicating the change in the initial logical unit to an object manager at the first processor; and
determining, by the object manager, an update operation to be performed on the mapped logical unit object.
4. The method of claim 1 , wherein determining the plurality of update operations based on the plurality of mapped logical unit objects comprises:
indicating the change in the initial logical unit to a plurality of object managers at the first processor corresponding to the plurality of mapped logical unit objects; and
determining, by the plurality of object managers, update operations to be performed on the mapped logical unit objects respectively.
5. The method of claim 1 , wherein sending the indication of the plurality of update operations to the second processor of the storage system comprises:
sending the indication to the second processor in response to the plurality of update operations being committed in one transaction.
6. The method of claim 1 , wherein sending the indication of the plurality of update operations to the second processor of the storage system comprises:
sending, by a pool manager at the first processor, to the second processor the indication including an identifier of a pool object corresponding to a pool to which the initial logical unit belongs.
7. An electronic device, comprising:
at least two processors; and
at least one memory including computer program instructions, the at least one memory and the computer program instructions configured, with a first processor of the at least two processors, to cause the electronic device to:
detect, at the first processor, a change in an initial logical unit corresponding to a storage area in a physical storage device of a storage system;
determine, based on the change in the initial logical unit, a plurality of update operations to be performed on a mapped logical unit driver mapping a plurality of initial logical units including the initial logical unit to a plurality of mapped logical units; and
send an indication of the plurality of update operations to a second processor of the storage system, to cause the second processor to perform the plurality of update operations on a peer mapped logical unit driver associated with the mapped logical unit driver;
wherein the at least one memory and the computer program instructions are further configured, with the first processor, to cause the electronic device to:
determine a pool to which the initial logical unit belongs;
determine a plurality of mapped logical unit objects in the pool; and
determine the plurality of update operations based on the plurality of mapped logical unit objects.
8. The electronic device of claim 7 , wherein the at least one memory and the computer program instructions are further configured, with the first processor, to cause the electronic device to:
determine that at least one of a state or an attribute of the initial logical unit changes.
9. The electronic device of claim 7 , wherein the at least one memory and the computer program instructions are further configured, with the first processor, to cause the electronic device to:
for each of the plurality of mapped logical unit objects,
indicate the change in the initial logical unit to an object manager at the first processor; and
determine, by the object manager, an update operation to be performed on the mapped logical unit object.
10. The electronic device of claim 7 , wherein the at least one memory and the computer program instructions are further configured, with the first processor, to cause the electronic device to:
indicate the change in the initial logical unit to a plurality of object managers at the first processor corresponding to the plurality of mapped logical unit objects; and
determine, by the plurality of object managers, update operations to be performed on the mapped logical unit objects respectively.
11. The electronic device of claim 7 , wherein the at least one memory and the computer program instructions are further configured, with the first processor, to cause the electronic device to:
send the indication to the second processor in response to the plurality of update operations being committed in one transaction.
12. The electronic device of claim 7 , wherein the at least one memory and the computer program instructions are further configured, with the first processor, to cause the electronic device to:
send, by a pool manager at the first processor, to the second processor the indication including an identifier of a pool object corresponding to a pool to which the initial logical unit is belongs.
13. A computer program product having a non-transitory computer readable medium which stores a set of instructions to operate a dual-processor storage system; the set of instructions, when carried out by computerized circuitry, causing the computerized circuitry to perform a method of:
detecting, at a first processor of the dual-processor storage system, a change in an initial logical unit corresponding to a storage area in a physical storage device of the dual-processor storage system;
determining, based on the change in the initial logical unit, a plurality of update operations to be performed on a mapped logical unit driver mapping a plurality of initial logical units including the initial logical unit to a plurality of mapped logical units; and
sending an indication of the plurality of update operations to a second processor of the dual-processor storage system, to cause the second processor to perform the plurality of update operations on a peer mapped logical unit driver associated with the mapped logical unit driver;
wherein determining the plurality of update operations to be performed on the mapped logical unit driver comprises:
determining a pool to which the initial logical unit belongs;
determining a plurality of mapped logical unit objects in the pool; and
determining the plurality of update operations based on the plurality of mapped logical unit objects.
14. The computer program product of claim 13 , wherein detecting the change in the initial logical unit comprises:
determining that at least one of a state or an attribute of the initial logical unit changes.
15. The computer program product of claim 13 , wherein determining the plurality of update operations based on the plurality of mapped logical unit objects comprises:
for each of the plurality of mapped logical unit objects,
indicating the change in the initial logical unit to an object manager at the first processor; and
determining, by the object manager, an update operation to be performed on the mapped logical unit object.
16. The computer program product of claim 13 , wherein determining the plurality of update operations based on the plurality of mapped logical unit objects comprises:
indicating the change in the initial logical unit to a plurality of object managers at the first processor corresponding to the plurality of mapped logical unit objects; and
determining, by the plurality of object managers, update operations to be performed on the mapped logical unit objects respectively.
17. The computer program product of claim 13 , wherein sending the indication of the plurality of update operations to the second processor of the storage system comprises:
sending the indication to the second processor in response to the plurality of update operations being committed in one transaction.
18. The computer program product of claim 13 , wherein sending the indication of the plurality of update operations to the second processor of the storage system comprises:
sending, by a pool manager at the first processor, to the second processor the indication including an identifier of a pool object corresponding to a pool to which the initial logical unit belongs.