Deletion indication implementation based on internal model

• US 9,864,691 B1
• Filed: 12/13/2013
• Issued: 01/09/2018
• Est. Priority Date: 12/13/2013
• Status: Active Grant

• Current Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Original Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Inventors: Chen, Jeegn, Pendergraft, James O., Speciner, Norman D., Zhao, Yue
• Primary Examiner(s): Rutz, Jared
• Assistant Examiner(s): Wu, Stephanie
• Application Number:
  US14/105,608
• Time in Patent Office: 1,488 Days
• Field of Search: None
• CPC Class Codes: G06F 12/0871 Allocation or management of cache space
• CPC Class Codes: G06F 12/0891 using clearing, invalidating or resetting means
• CPC Class Codes: G06F 16/1827 Management specifically adapted to NAS management of storage area networks [SAN] G06F3/067
• CPC Class Codes: G06F 3/0607 by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
• CPC Class Codes: G06F 3/0652 Erasing, e.g. deleting, data cleaning, moving of data to a wastebasket
• CPC Class Codes: G06F 3/0661 Format or protocol conversion arrangements
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion

Abstract

The subject disclosure is generally directed towards caching property values in a sparse cache for use in translating notifications to contain property values related to a source instance, e.g., for use in SMI-S compliant notifications (deletion indications). When a deletion indication translation needs properties that are unavailable in the current source instance, a cache is accessed to obtain the previous related property values. The deletion indication is translated based upon the related property values, and output, e.g., as a translated deletion indication to a client subscriber.

Claims

1. A method comprising:

on determining a previous property value corresponding to a resource is required for translation of a deletion indication in an event of a future deletion or modification of the resource, caching an initial property value corresponding to the resource, the cached initial property value is the previous property value to be utilized for translation of a future deletion indication to a storage management initiative specification (SMI-S) compliant deletion indication;

receiving an original deletion indication from a server upon deletion of the resource, the original deletion indication comprising a current source instance, the current source instance comprising a source value, the previous property value is not included in the current source instance;

obtaining the previous property value from the cache;

translating, by one or more processors, the original deletion indication into a translated deletion indication, the translated deletion indication is compatible with the SMI-S based upon the previous property value and the source value, the translated deletion indication comprising the previous property value and the source value; and

outputting the translated deletion indication to a client to notify the client of the deletion of the resource.

2. The method of claim 1, further comprising:

on outputting the translated deletion indication to the client, deleting the previous property value for the property from the cache.

3. The method of claim 1, further comprising:

determining that the original deletion indication corresponds to an indication for which the previous property value in the cache is maintained, wherein the cache is a sparse cache maintained by an SMI-S application programming interface (API) layer;

obtaining the previous property value from the sparse cache; and

performing translation of the original deletion indication into the translated deletion indication according to the previous property value.

4. The method of claim 1, wherein outputting the translated deletion indication to the client further comprises:

sending the translated deletion indication to a plurality of client subscribers.

5. The method of claim 1, further comprising:

populating the cache with a set of initial property values during system startup, the set of initial property values comprising the previous property value.

6. The method of claim 5, wherein populating the cache further comprises:

querying a user interface (UI) services for the set of initial property values; and

caching the set of initial property values in a sparse cache.

7. The method of claim 1, further comprising:

receiving an instance creation notification, querying a UI services to obtain the initial property value related to the instance, receiving the initial property value, and populating the cache with the initial property value.

8. The method of claim 1, wherein receiving the original deletion indication comprises:

communicating with a services layer for connecting with underlying storage-related components associated with the server; and

receiving the original deletion indication by a SMI-S layer.

9. A system comprising:

one or more processors; and

a memory, the memory configured to include deletion implementation logic, the deletion implementation logic including deletion indication handling logic to translate an original deletion indication received from a server upon deletion of a resource, in which the original deletion indication contains a source instance, the one or more processors executing the deletion indication handling logic to read a sparse cache containing one or more related previous property values corresponding to the source instance, obtain the one or more related previous property values from the sparse cache;

translate the original deletion indication into a storage management initiative specification (SMI-S) compliant translated deletion indication based on the cached one or more previous property values and a value or values in the source instance; and

send the translated deletion indication to at least one subscribing client to notify the at least one subscribing client of the deletion of the resource, a previous property value in the one or more related previous property values comprising a resource-related property value that is not included in the source instance from the server providing the original deletion indication upon deletion of the resource, the translated deletion indication comprising the one or more related previous property values.

10. The system of claim 9, wherein at least part of the deletion implementation logic is incorporated into or coupled to a SMI-S application programming interface (API) layer.

11. The system of claim 10, wherein the SMI-S API layer receives the deletion indication from the server via a services layer for connecting with underlying storage-related components.

12. The system of claim 10, wherein the SMI-S API layer is configured to send the translated deletion indication to the at least one subscribing client.

13. The system of claim 9, wherein the previous property value corresponds to at least one of:

drive type data, operational status data, friendly identifier data, storage pool identifier data, remaining space data, type data, ISCSI name data, or Netbios name data.

14. The system of claim 9, wherein the deletion implementation logic further comprises:

logic configured to pre-populate the sparse cache.

15. The system of claim 9, wherein the deletion implementation logic further comprises:

logic configured to update the sparse cache based upon instance creation.

16. The system of claim 9, wherein the deletion implementation logic further comprises:

logic configured to remove the previous property value from the sparse cache.

17. One or more non-transitory machine-readable storage media having machine-executable instructions, which when executed perform steps, comprising:

receiving an original deletion indication upon deletion of a resource, the original deletion indication comprising a source instance, the source instance comprising zero or more properties;

determining whether one or more previous related property values corresponding to a resource are needed for translation of the original deletion indication into a storage management initiative specification (SMI-S) compliant deletion indication, and if so;

(i) accessing cached data to read the one or more previous related property values that correspond to the source instance, a previous property value in the one or more previous related property values comprising a resource related property value that is not included in the source instance;

(ii) translating the original deletion indication into a translated deletion indication based upon the one or more previous related property values, the translated deletion indication is compatible with the SMI-S, the translated deletion indication comprising the one or more previous related property values corresponding to the source instance; and

(iii) outputting the translated deletion indication to one or more clients to notify the one or more clients of the deletion of the resource.

18. The non-transitory machine-readable storage media of claim 17 having further machine-executable instructions comprising:

on outputting the translated deletion indication to a client, deleting the previous value for the property from a cache.

19. The non-transitory machine-readable storage media of claim 17 having further machine-executable instructions comprising:

populating a cache with one or more related property values based upon an instance creation in anticipation of a future deletion.

20. The non-transitory machine-readable storage media of claim 17 having further machine-executable instruction comprising:

outputting a non-translated deletion indication upon determining that the one or more previous related property values are not needed for the original deletion indication.