Dynamic resource profiles for clusterware-managed resources

• US 20080222642A1
• Filed: 03/08/2007
• Published: 09/11/2008
• Est. Priority Date: 03/08/2007
• Status: Active Grant

• Current Assignee: Oracle International Corporation (Oracle Corporation)
• Original Assignee: Oracle International Corporation (Oracle Corporation)
• Inventors: Srivastava, Alok K., Tellez, Juan, Khaladkar, Ashwinee B., Kumar, Gaurav, Kakarla, Sarat B.
• Granted Patent: US 8,209,417 B2
• Time in Patent Office: Days
• US Class Current: 718/104
• CPC Class Codes: G06F 9/5077 Logical partitioning of resources; Management or configuration of virtualized resources specific details on emulation or internal functioning of virtual machines G06F9/455

Abstract

Allowing for resource attributes that may change dynamically while the resource is in use, provides for dynamic changes to the manner in which such resources are managed. Management of dynamic resource attributes by clusterware involves new entry points to clusterware agent modules, through which resource-specific user-specified instructions for discovering new values for resource attributes, and for performing a user-specified action in response to the new attribute values, are invoked. A clusterware policy manager may know ahead of time that a particular resource has dynamic attributes or may be notified when a resource'"'"'s dynamic attribute has changed and, periodically or in response to the notification, request that the agent invoke the particular resource-specific instructions for discovering new values for attributes for the particular resource and/or for performing a user-specified action in response to the new attribute values. During the majority of this process, the resource remains available.

Claims

1. A method comprising performing a machine-executed operation involving instructions for clusterware management of resources that operate in a cluster of computing nodes, and wherein said instructions are instructions which, when executed by one or more processors, cause the one or more processors to perform certain steps comprising:

while said clusterware is managing a particular resource according to a first resource management behavior based on a first value of a particular attribute of said particular resource, allowing a change to said particular attribute of said particular resource from said first value to a second value; and

in response to said change to said particular attribute, said clusterware beginning to manage said particular resource according to a second resource management behavior based on said second value of said particular attribute;

wherein the machine-executed operation is at least one of (a) sending said instructions over transmission media, (b) receiving said instructions over transmission media, (c) storing said instructions onto a machine-readable storage medium, and (d) executing the instructions.

2. The method of claim 1, wherein said clusterware begins to manage said particular resource according to said second resource management behavior without stopping operation of said particular resource.

3. The method of claim 1, said certain steps further comprising:

identifying said particular attribute of said particular resource as a dynamic attribute based on a resource profile associated with said particular resource.

4. The method of claim 3, wherein said identifying comprises identifying said particular attribute as a dynamic attribute of said particular resource based on a syntactic identifier associated with said particular attribute in said resource profile.

5. The method of claim 1, said certain steps further comprising:

causing a first call to a first set of one or more instructions, wherein said first set of one or more instructions, when executed in response to said first call, cause discovery of said second value of said particular attribute of said particular resource.

6. The method of claim 5, said certain steps further comprising:

causing a second call to a second set of one or more instructions, wherein said second set of one or more instructions, when executed in response to said second call, causes performance of a user-defined action in response to discovery of said second value of said particular attribute.

7. The method of claim 6, wherein causing said second call to said second set of one or more instructions is performed in response to causing said first call to said first set of one or more instructions.

8. The method of claim 6, wherein causing said first call and causing said second call are performed by a resource policy manager of said clusterware, and wherein said first and second calls are made by an agent of said clusterware, and wherein said agent is specific to a type of resource with which said particular resource is associated.

9. The method of claim 6, wherein said particular resource is a particular type of resource, and wherein said first set of one or more instructions and said second set of one or more instructions are user-defined and specific to said particular type of resource.

10. The method of claim 6, wherein causing said first call and causing said second call are performed by a resource policy manager of said clusterware, said certain steps further comprising:

said resource policy manager evaluating one or more resource policies associated with said particular resource in view of said second value of said particular attribute; and

if evaluation of said one or more resource policies requires performance of a particular action in response to said second value of said particular attribute, then said resource policy manager causing performance of said particular action.

11. The method of claim 10, wherein said one or more resource policies comprise at least one high availability resource policy that specifies what to do in response to said particular resource failing.

12. The method of claim 10, wherein causing performance of said particular action includes said causing said second call to said second set of one or more instructions.

13. The method of claim 5, wherein causing said first call to said first set of one or more instructions is performed in response to a manual change to said particular attribute of said particular resource.

14. The method of claim 5, wherein causing said first call to said first set of one or more instructions is performed in response to determining that a value is not currently set for said particular attribute of said particular resource.

15. The method of claim 5, wherein causing said first call to said first set of one or more instructions is performed in response to automatic invalidation, after a certain time interval, of a value for said particular attribute of said particular resource.

16. The method of claim 5, wherein causing said first call to said first set of one or more instructions is performed in response to expiration of a time interval specified in an attribute discovery schedule associated with said particular attribute of said particular resource.

17. The method of claim 5, said certain steps further comprising:

determining whether said particular attribute of said particular resource is specified as having a persistent value;

if determined that said particular attribute of said particular resource is specified as having a persistent value, then persistently storing said second value in a cluster configuration repository; and

if determined that said particular attribute of said particular resource is not specified as having a persistent value, then storing said second value in volatile memory.

18. The method of claim 17, said certain steps further comprising:

in response to rebooting a node in said cluster, retrieving said second value of said particular attribute of said particular resource from said cluster configuration repository; and

managing said particular resource according to said second resource management behavior.

19. The method of claim 17, said certain steps further comprising:

in response to rebooting said cluster, retrieving said second value of said particular attribute of said particular resource from said cluster configuration repository; and

managing said particular resource according to said second resource management behavior.

20. A method comprising performing a machine-executed operation involving instructions for clusterware management of dynamic resource attributes, wherein said clusterware comprises a resource policy manager that manages cluster resources, and wherein said instructions are instructions which, when executed by one or more processors, cause the one or more processors to perform certain steps comprising:

causing a first call to a first set of one or more instructions, wherein said first set of one or more instructions, when executed in response to said first call, discovers a new value of a particular attribute of a particular resource; and

causing a second call to a second set of one or more instructions, wherein said second set of one or more instructions, when executed in response to said second call, performs a user-defined action in response to said new value;

wherein the machine-executed operation is at least one of (a) sending said instructions over transmission media, (b) receiving said instructions over transmission media, (c) storing said instructions onto a machine-readable storage medium, and (d) executing the instructions.

21. A computer-readable medium storing a clusterware computer program for managing dynamic resource attributes used by a cluster of processing nodes, said computer program comprising one or more sequences of executable instructions comprising:

a policy module, which requests an agent to invoke a first set of one or more instructions, wherein said first set of one or more instructions are specific to a particular type of resource having one or more dynamic attributes; and

said agent, which invokes said first set of one or more instructions at a first entry point of said agent, wherein said first set of one or more instructions, when executed in response to said agent invoking, discovers a new value of a particular attribute of a particular resource of said particular type, and which returns said new value to said policy module in response to said request.

22. The computer-readable medium of claim 21, said one or more sequences of executable instructions further comprising:

said policy module requesting said agent to invoke a second set of one or more instructions, wherein said second set of one or more instructions are specific to said particular type of resource; and

said agent invoking said second set of one or more instructions at a second entry point of said agent, wherein said second set of one or more instructions, when executed in response to said agent invoking, performs a particular user-defined action in response to said new value.

23. The computer-readable medium of claim 21, said one or more sequences of executable instructions further comprising:

said policy module persistently storing said new value of said particular attribute in a cluster configuration repository.

24. A computer-readable medium storing a clusterware computer program for managing resources used by a cluster of processing nodes, said clusterware computer program comprising:

a first programmatic interface to a resource type-specific clusterware agent, for receiving first resource type-specific code for discovering a new value of a particular attribute of a particular resource; and

a second programmatic interface to said clusterware agent, for receiving second resource type-specific code for performing a user-defined action in response to said new value;

a first programmatic entry point to said clusterware agent, for invoking said first resource type-specific code for discovering a new value of a particular attribute of said particular resource; and

a second programmatic entry point to said clusterware agent, for invoking said second resource type-specific code for performing a user-defined action in response to said new value.