Object interface to a dispersed data storage network

• US 8,533,256 B2
• Filed: 12/29/2009
• Issued: 09/10/2013
• Est. Priority Date: 10/09/2007
• Status: Active Grant

• Current Assignee: Pure Storage, Inc.
• Original Assignee: Cleversafe Incorporated (International Business Machines Corporation)
• Inventors: Baptist, Andrew, Palthepu, Srinivas, Gladwin, S. Christopher, Dhuse, Greg, Mark, Zachary J., Thornton, Vance T., Quigley, John
• Primary Examiner(s): DINH, KHANH Q
• Application Number:
  US12/648,528
• Publication Number:
  US 20100169391A1
• Time in Patent Office: 1,351 Days
• Field of Search: 709/203, 709/220, 709/228, 714/6, 714/752
• US Class Current: 709/203
• CPC Class Codes: G06F 16/168 Details of user interfaces specifically adapted to file systems, e.g. browsing and visualisation, 2d or 3d GUIs query results presentation G06F16/156
• CPC Class Codes: G06F 16/182 Distributed file systems

Abstract

A data object interface to a dispersed data storage network is disclosed. The disclosed interface accepts read and write commands from a client computer and generates network commands that are forwarded to slice servers that form the storage component of the dispersed data storage network. The slice servers then fulfill the read and write commands.

Claims

1. A method of reading a data object from a dispersed data storage network that includes a plurality of networked computers and a plurality of slice servers, each of said plurality of slice servers storing at least one of a plurality of data slices, whereby n of said plurality of data slices are associated with said data object, and whereby m of said associated data slices are required to reconstruct said data object, and further whereby m is less than n, said method comprising the steps of:

receiving data indicative of the data object to read;

based on the data indicative of the data object to read;

accessing a root directory associated with a vault in which the data object is stored;

retrieving one or more directories listed in the root directory from the data storage network;

accessing a home directory of the one or more directories;

accessing file object metadata from the home directory, wherein the file object metadata identifies slice servers storing data slices associated with said data object;

reading m data slices from m of said slice servers; and

assembling said data object from said read data slices.

2. The method of claim 1 wherein said data indicative of the data object to read is a unique data object identifier.

3. The method of claim 1 wherein said data indicative of the data object to read is a user supplied name.

4. The method of claim 3 further comprising the step of generating a data object identifier from said user supplied name using a hashing function.

5. A computer for reading a data object from a dispersed data storage network comprising a plurality of networked computers including a plurality of slice servers, each of said plurality of slice servers storing at least one of a plurality of data slices, whereby n of said plurality of data slices are associated with said data object, and whereby m of said associated data slices are required to reconstruct said data object, and further whereby m is less than n, said computer comprising:

a network port;

a database including a plurality of information records wherein an information record of said information records identifies the data object stored by said dispersed data storage network and identifies the n data slices including data associated with said identified data object; and

a dispersed data storage application for (1) receiving data indicative of the data object to read, (2) based on the data indicative of the data object to read;

accessing a root directory associated with a vault in which the data object is stored;

retrieving one or more directories listed in the root directory from the data storage network;

accessing a home directory of the one or more directories;

accessing file object metadata from the home directory, wherein the file object metadata identifies slice servers storing data slices associated with said data object;

(3) reading m of said data slices from the identified slice servers using said network port, and (4) assembling said data object from said read data slices.

6. The computer of claim 5 wherein said data indicative of the data object to read is a unique data object identifier.

7. The computer of claim 5 wherein said data indicative of the data object to read is a user supplied name.

8. The computer of claim 7 further comprising the step of generating a data object identifier from said user supplied name using a hashing function.