Federated management of a plurality of metadata storage mechanisms

• US 10,353,914 B2
• Filed: 09/29/2014
• Issued: 07/16/2019
• Est. Priority Date: 09/29/2014
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Shank, Charles K.
• Primary Examiner(s): Thomas, Ashish
• Assistant Examiner(s): Ohba, Mellissa M.
• Application Number:
  US14/500,507
• Publication Number:
  US 20160092531A1
• Time in Patent Office: 1,751 Days
• CPC Class Codes: G06F 16/256 in federated or virtual databases

Abstract

Metadata is managed for different distributed federated workspaces. A distributed metadata infrastructure is provided for supporting at least two different distributed federated workspaces. The distributed metadata infrastructure monitors the at least two different distributed federated workspaces to identify common metadata between the at least two different distributed federated workspaces. The distributed metadata infrastructure presents a consistent view of the common metadata.

Claims

1. A system comprising a central system for managing metadata for different distributed federated workspaces, the central system coupled to a remote system, the central system comprising:

a memory; and

a processor coupled to the memory, wherein the processor performs operations, the operations comprising;

generating classes to represent information required by the central system;

for each class, defining attributes and associations of interest;

for each class, selecting an identity attribute to serve as an element in an identity string for instances of the class;

defining an identity ordering among the classes;

concatenating an identity to a predecessor identity in an ordered identity definition to determine identity for an object of a class in the central system, wherein in response to determining by the remote system that a class in the remote system is intended to be shared with the central system, determining a class in the central system such that a semantic equivalence relationship holds between the class in the remote system and the determined class in the central system, wherein the semantic equivalence relationship holds if a selected identity attribute in the class of the remote system is semantically compatible with an identity attribute previously defined for the determined class in the central system, wherein a plurality of remote objects in the remote system are mapped to a single object in the central system based on holding of semantic equivalence relationships via the remote system determining a class Y in the central system such that Map(X) that represents a semantic equivalence relationship between classes in two or more models holds for a class X to be shared with the central system, wherein a metadata source tool cannot be modified to write directly to a workspace of the remote system, and wherein the workspace of the remote system is configured to enable monitoring of a change in metadata of the remote system; and

importing the metadata of the remote system to the central system in response to a change detected in the metadata of the remote system, by using semantic equivalence relationships, and wherein the metadata of the remote system includes additional information specific to the remote system in comparison to the central system.

2. The system of claim 1, wherein at least two different distributed federated workspaces are disjoint.

3. The system of claim 1, wherein a monitoring of at least two different distributed federated workspaces to identify common metadata between the at least two different distributed federated workspaces utilizes a persistence layer in a workspace to achieve metadata liveness.

4. The system of claim 3, wherein the persistence layer is used at an edge, and wherein the persistence layer that is used at the edge is maintained in a cloud computing environment.

5. The system of claim 4, the operations further comprising:

utilizing a universally unique identifier (UUID) to uniquely reference an object common to the at least two different distributed federated workspaces.

6. The system of claim 5, wherein a workspace in the at least two different distributed federated workspaces has objects selected from a group consisting of documents, files, directories, videos, communities, and applications.

7. The system of claim 1, wherein the remote system has a more granular representation than the central system.

8. The system of claim 7, wherein the remote system uniformly maps an identity in the central system to an identity in the remote system by using a local function in the remote system.

9. The system of claim 1, wherein the remote system performs operations to perform:

create classes to represent information; and

for each class X, define attributes and associations of interest.

10. The system of claim 9, wherein the remote system performs further operations to perform:

for each class X select an attribute to serve as an element i in an identity string I for instances of the class, wherein if class X is mapped such that Map(X) equals Y then a selected identity attribute i is semantically compatible with an identity attribute previously defined for Y;

define an identity ordering amongst classes;

define an identity I for any object of a particular class to be an identity i concatenated to Pred(i) that is a predecessor identity of i in an ordered identity definition; and

if I_remote represents an identity of a class X in the remote system where there exists an Y in the central system such that Y equals maps(X), wherein if I_remote equals Covers(I_central) then a plurality of remote objects are mapped to and represented by a single object in the central system, wherein Covers (I) represents a group of non empty subsets of an identity I, such that an union of the non empty subsets contains set I with no duplicates.

11. A computer program product for managing metadata for different distributed federated workspaces, the computer program product comprising:

a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code configured to perform operations on a processor, the operations comprising;

generating classes to represent information required by a central system, wherein the central system is coupled to a remote system;

for each class, defining attributes and associations of interest;

for each class, selecting an identity attribute to serve as an element in an identity string for instances of the class;

defining an identity ordering among the classes; and

concatenating an identity to a predecessor identity in an ordered identity definition to determine identity for an object of a class in the central system, wherein in response to determining by the remote system that a class in the remote system is intended to be shared with the central system, determining a class in the central system such that a semantic equivalence relationship holds between the class in the remote system and the determined class in the central system, wherein the semantic equivalence relationship holds if a selected identity attribute in the class of the remote system is semantically compatible with an identity attribute previously defined for the determined class in the central system, wherein a plurality of remote objects in the remote system are mapped to a single object in the central system based on holding of semantic equivalence relationships via the remote system determining a class Y in the central system such that Map(X) that represents a semantic equivalence relationship between classes in two or more models holds for a class X to be shared with the central system, wherein a metadata source tool cannot be modified to write directly to a workspace of the remote system, and wherein the workspace of the remote system is configured to enable monitoring of a change in metadata of the remote system; and

importing the metadata of the remote system to the central system in response to a change detected in the metadata of the remote system, by using semantic equivalence relationships, and wherein the metadata of the remote system includes additional information specific to the remote system in comparison to the central system.

12. The computer program product of claim 11, wherein at least two different distributed federated workspaces are disjoint.

13. The computer program product of claim 11, wherein a monitoring of at least two different distributed federated workspaces to identify common metadata between the at least two different distributed federated workspaces utilizes a persistence layer in a workspace to achieve metadata liveness.

14. The computer program product of claim 13, wherein the persistence layer is used at an edge, and wherein the persistence layer that is used at the edge is maintained in a cloud computing environment.

15. The computer program product of claim 14, the operations further comprising:

utilizing a universally unique identifier (UUID) to uniquely reference an object common to the at least two different distributed federated workspaces.

16. The computer program product of claim 11, wherein the remote system has a more granular representation than the central system.

17. The computer program product of claim 16, wherein the remote system uniformly maps an identity in the central system to an identity in the remote system by using a local function in the remote system.

18. The computer program product of claim 11, wherein the remote system performs operations to perform:

create classes to represent information; and

for each class X, define attributes and associations of interest.

19. The computer program product of claim 18, wherein the remote system performs further operations to perform:

for each class X select an attribute to serve as an element i in an identity string I for instances of the class, wherein if class X is mapped such that Map(X) equals Y then a selected identity attribute i is semantically compatible with an identity attribute previously defined for Y;

define an identity ordering amongst classes;

define an identity I for any object of a particular class to be an identity i concatenated to Pred(i) that is a predecessor identity of i in an ordered identity definition; and

if I_remote represents an identity of a class X in the remote system where there exists an Y in the central system such that Y equals Map(X), wherein if I_remote equals Covers(I_central) then a plurality of remote objects are mapped to and represented by a single object in the central system, wherein Covers (I) represents a group of non empty subsets of an identity I, such that an union of the non empty subsets contains set I with no duplicates.