Storing and retrieving mutable objects

1. A method for execution by one or more processing modules of one or more computing devices of a dispersed storage network (DSN), the method comprises:

identifying, by a dispersed storage module, a data object to access within a DSN vault, where the DSN vault includes a virtual memory block associated with a portion of an overall namespace of the DSN;

identifying, by a dispersed storage module, a vault ID based on the data object and the DSN vault, where the vault ID identifies a vault of the DSN associated with a data object requesting entity;

obtaining, by a dispersed storage module, an object ID based on the data object, where the object ID is retrieved from a DSN index lookup based on a data name and performing a deterministic function on the data name;

selecting, by a dispersed storage module, one or more generation IDs based on generation status, where the generation status is at least based on accessing a generation utilization list of a registry to identify a fullness level associated with each potential one of the one or more generation IDs for the DSN vault;

for each of the one or more generation IDs, generating, by a dispersed storage module, at least one set of slice names using the vault ID, the generation ID, and the object ID; and

for each set of slice names, generating, by a dispersed storage module, a set of slice access requests that includes the set of slice names; and

accessing, by a dispersed storage module, DSN storage units utilizing the set of slice access requests; and

wherein the accessing may further be based on a request type wherein, for a read request type, slice access responses are received, and favorable slice access responses decoded using a dispersed storage error coding function to reproduce one or more data segments of data and, for a write request type, storage of the data object is confirmed when receiving a write threshold number of favorable slice access responses from the DSN for each data segment of a plurality of data segments of the data.

2. The method of claim 1 , wherein the dispersed storage module identifies a data object access request within a dispersed storage network (DSN).

3. The method of claim 2 wherein the identifying a data object to access within a DSN is based on receiving the data object access request that includes one or more of: a data name, a requester identifier (ID), a vault ID, an object ID, a source name, or data.

4. The method of claim 1 , wherein the identifying a vault ID is based on an ID lookup based on a data name.

5. The method of claim 1 , wherein the identifying a vault ID is based on a data object requester ID.

6. The method of claim 1 , wherein the obtaining further includes obtaining the object ID based on one or more of: a request type, data, receiving the object ID, or a data name.

7. The method of claim 1 , wherein the generation status further indicates availability of one or more generation IDs.

8. The method of claim 1 , wherein the fullness level indicates full or not full.

9. The method of claim 1 , wherein the selecting further includes selecting the generation IDs based on one or more of: a request type and the generation status.

10. The method of claim 1 , wherein the selecting, for a read request, includes selecting each of the generation IDs associated with a generation status that indicates that a generation is full and selects a generation ID that is one greater than a largest generation ID of one or more generation IDs that are full, if any.

11. The method of claim 1 , wherein the selecting, for a write request, selecting a lowest generation ID associated with a generation that is not full.

12. The method of claim 1 , wherein the generating, for a write request, includes a set of slice names and includes a set of encoded data slices that are encoded, using a dispersed storage error coding function, from a corresponding data segment of the data.

13. The method of claim 1 , wherein the generating, for a read request, the processing module includes a set of slice names.

14. The method of claim 1 , wherein the accessing includes outputting the set of slice access requests to the DSN.

15. A computing device of a group of computing devices of a dispersed storage network (DSN), the computing device comprises:

an interface;

a local memory; and

a dispersed storage module operably coupled to the interface and the local memory, wherein the processing module functions to:

identify a data object to access within a DSN vault, where the DSN vault includes a virtual memory block associated with a portion of an overall namespace of the DSN;

identify a vault ID based on the data object and the DSN vault, where the vault ID identifies a vault of the DSN associated with a data object requesting entity;

obtain an object ID based on the data object, where the object ID is retrieved from a DSN index lookup based on a data name and performing a deterministic function on the data name;

select at least one or more generation IDs based on generation status, where the generation status is at least based on accessing a generation utilization list of a registry to identify a fullness level associated with each potential one of the one or more generation IDs for the DSN vault;

for each of the one or more generation IDs, generate at least one set of slice names using the vault ID, the generation ID, and the object ID; and

for each set of slice names, generate a set of slice access requests that includes the set of slice names; and

access DSN storage units utilizing the set of slice access requests, and

wherein the access may further be based on a request type wherein, for a read request type, slice access responses are received, and favorable slice access responses decoded using a dispersed storage error coding function to reproduce one or more data segments of the data and, for a write request type, storage of the data object is confirmed when receiving a write threshold number of favorable slice access responses from the DSN for each data segment of a plurality of data segments of the data.

16. A method for execution by one or more processing modules of one or more computing devices of a dispersed storage network (DSN), the method comprises:

receiving, by a dispersed storage module, a data name for retrieval from DSN storage units;

identifying, by a dispersed storage module, a data object based on the data name to access within a DSN vault, where the DSN vault includes a virtual memory block associated with a portion of an overall namespace of the DSN;

identifying, by a dispersed storage module, a vault ID based on the data object and the DSN vault, where the vault ID identifies a vault of the DSN associated with a data object requesting entity;

obtaining, by a dispersed storage module, an object ID based on the data object, where the object ID is retrieved from a DSN index lookup based on a data name and performing a deterministic function on the data name;

selecting, by a dispersed storage module, each generation of the DSN vault that is full for a corresponding source name and a next generation of the DSN vault after a last full generation, where a DSN vault is full at least based on accessing a generation utilization list of a registry to identify a fullness level associated with each potential generation IDs for the DSN vault;

for each generation of the DSN vault selected, generating, by a dispersed storage module, at least one set of slice names using the vault ID, a generation ID, and the object ID; and

for each set of slice names, generating, by a dispersed storage module, a set of slice access requests to read slices that includes the set of slice names; and

outputting, by a dispersed storage module, the slice access requests to a DS (dispersed storage) unit set;

receiving, by a dispersed storage module, at least a decode threshold of the set of slices; and

decoding, by a dispersed storage module, the received slices to produce the data object.