US 2008/0168170 A1Published application

Method for accessing distributed file system

AssigneeHitachi, Ltd.

InventorsYoji Nakatani, Masaaki Iwasaki, Yutaka Enko

Life of this patent

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Abstract

In order to access a distributed file system (DFS) of the present invention using a conventional protocol such as the one for an NFS or a CIFS without making a modification on a client side, a gateway unit for receiving a conventional protocol and performing processing in conformity the protocol is provided for a DFS server. The gateway unit emulates a directory structure in a file system such as the NFS or CIFS. When the DFS is a write-once read-many file system, update processing is converted into processing for creating a new generation file, and reference processing is converted into access to a latest generation file in a generation-managed file group. The gateway unit then accesses a DFS file via a DFS processing unit.

Claims14

Dependent claims

A storage system comprising:

a storage component for storing data of a file;
and
a gateway component receiving a first type access request from a computer in accordance with a first type protocol, sending a second type access request to the storage component in accordance with a second type protocol, and managing a relation between a file specified by a path name and a file name in accordance with the first type protocol and an ID assigned to a content of the file in accordance with the second type protocol, the path name indicating a directory including the file, the file name being a unique identifier to specify the file in the directory, and the ID being a unique identifier to specify the content of the file in the storage component,
wherein current data of a first file is stored in the storage component as a first content specified by a first ID in accordance with the second type protocol,
wherein the gateway component receives an update request from the computer in accordance with the first type protocol for the first file specified by a first path name and a first file name included in the update request, the update request instructing to update the first file by using update data,
wherein the gateway component issues a write request, in accordance with the second type protocol, to the storage component to instruct the storage component to store a second content including the update data, and
wherein a second ID different from the first ID is assigned to the second content in accordance with the second type protocol.

4 more elements

A storage system comprising:

a storage component for storing data of a file;
and
a gateway component receiving a first type access request from the computer in accordance with a first type protocol and issuing a second type access request to the storage component in accordance with a second type protocol;
wherein according to the first type protocol, a file is specified by using a path name indicating a directory including the file and a file name being a unique identifier to specify the file in the directory,
wherein according to the second type protocol, a content of the file is specified by using an ID, which is a unique identifier to specify the content in the storage component,
wherein in the storage component, current data of a first file is stored as a first content specified by a first ID in accordance with the second type protocol,
wherein from the computer, the gateway component receives an update request, in accordance with the first type protocol, to update the current data of the first file by using update data, the first file being specified by a first path name and a first file name included In the update request, and
wherein the gateway component issues a write request, in accordance with the second type protocol, to the storage component to store a second content, to which a second ID different from the first ID is assigned in accordance with the second type protocol,
wherein the second content includes the update data,

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/073,286Filed 4 Mar 2008
Priority: JP 2003-06855313 Mar 2003
Published: 10 Jul 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04L 67/06
Protocols: specially adapted for file transfer, e.g. file transfer protocol [FTP]
G06F 16/10
Information retrieval; Database structures therefor; File system structures therefor: file systems; File servers
H04L 67/1097
In which an application is distributed across nodes in the network: for distributed storage of data in networks, e.g. transport arrangements for…
H04L 69/18
Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass:…

Family

Application10/645,813Continuation · filed 20 Aug 2003
Application11/488,685Continuation · filed 19 Jul 2006
Application12/073,286Continuation
US 2004/0181605 A1Published application
US 2006/0259611 A1Published application
US 7,143,146 B2Related patent
US 7,363,352 B2Related patent
US 7,548,959 B2Related patent
US 2008/0168170 A1This patent

From the US filing history. Foreign family members aren’t listed.