SYSTEM THAT MAINTAINS OBJECTS CREATED AND MODIFIED WITHIN DESIGNATED DIRECTORIES ON A PER-CLIENT BASIS IN A NETWORK FILESYSTEM

• US 20100268738A1
• Filed: 04/16/2009
• Published: 10/21/2010
• Est. Priority Date: 04/16/2009
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Hsiao, Duen-wen, Brown, William B.
• Granted Patent: US 9,524,396 B2
• Time in Patent Office: Days
• US Class Current: 707/781
• CPC Class Codes: G06F 16/10 File systems; File servers
• CPC Class Codes: G06F 16/119 Details of migration of file systems migration mechanisms in storage systems G06F3/0647
• CPC Class Codes: G06F 16/13 File access structures, e.g. distributed indices arrangements of input from, or output to, record carriers G06F3/06
• CPC Class Codes: G06F 16/18 File system types
• CPC Class Codes: G06F 16/20 of structured data, e.g. relational data
• CPC Class Codes: G06F 21/6218 to a system of files or objects, e.g. local or distributed file system or database
• 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]

Abstract

Systems that maintain objects created and modified within designated directories on a per-client basis in a network filesystem include a file server having a local processor, memory operably connected to the local processor, a filesystem including main directories loaded into the memory, and a list of operations loaded into the memory; at least one client operably connected to the server having a remote processor and memory operably connected to the remote processor; wherein the file server has designated at least one of the main directories as a per-client writable directory; and wherein the file server has exported the filesystem read-only to at least one client.

Claims

1. A method of maintaining objects created and modified within designated directories on a per-client basis in a network filesystem comprising:

providing a file server having a local processor, memory operably connected to the local processor, a filesystem including main directories loaded into the memory, and a list of operations loaded into the memory;

providing at least one client operably connected to the server having a remote processor and memory operably connected to the remote processor;

designating at least one of the main directories as a per-client writable directory;

exporting the filesystem read-only to at least one client;

responsive to a client requesting to read a file, the server determining if the file is designated to be in a per-client writable directory; and

responsive to the server determining the requested file is designated to be in a per-client writable directory, the server returning the requested file to the client from the per-client writable directory.

2. The method of claim 2, further comprising:

responsive to the server determining the requested file is not in a per-client writable directory, the server determining if the requested file is designated to be in a main directory; and

responsive to the server determining the requested file is designated to be in a main directory, the server returning the requested file to the client from the main directory.

3. The method of claim 3, further comprising responsive to the server determining the requested file is not designated to be in a main directory, the server returning an error message to the client.

4. A method of maintaining objects created and modified within designated directories on a per-client basis in a network filesystem comprising:

providing a server having a local processor, memory operably connected to the local processor, a filesystem including main directories loaded into the memory, and a list of operations loaded into the memory;

providing at least one client operably connected to the server having a remote processor and memory operably connected to the remote processor;

designating at least one of the main directories as a per-client writable directory;

exporting the filesystem read-only to at least one client;

responsive to a client requesting to write a file, the server determining if the file is designated to be in a per-client writable directory; and

responsive to the server determining the requested file is designated to be in a per-client writable directory, the server writing the requested file to the filesystem in the designated per-client writable directory.

5. The method of claim 4, further comprising:

responsive to the server determining the requested file is designated to be in a per-client writable directory, the server determining if the per-client writable directory exists; and

responsive to the server determining the per-client writable directory does not exist, the server creating a per-client writable directory in the file system before writing the requested file to the filesystem in the designated per-client writable directory.

6. The method of claim 5, further comprising responsive to the server determining the requested file is not designated to be in a per-client writable directory, the server returning an error message to the client.

7. A system that maintains objects created a modified within designated directories on a per-client basis in a network filesystem comprising:

a file server having a local processor, memory operably connected to the local processor, a filesystem including main directories loaded into the memory, and a list of operations loaded into the memory;

at least one client operably connected to the server having a remote processor and memory operably connected to the remote processor;

wherein the file server has designated at least one of the main directories as a per-client writable directory;

wherein the file server has exported the filesystem read-only to at least one client;

wherein responsive to a client requesting to read a file, the operations instruct the server to determine if the file is designated to be in a per-client writable directory; and

wherein responsive to the server determining the requested file is designated to be in a per-client writable directory, the operations instruct the server to return the requested file to the client from the per-client writable directory.

8. The system of claim 7, further comprising:

wherein responsive to the server determining the requested file is not in a per-client writable directory, the operations instruct the server to determine if the requested file is designated to be in a main directory; and

wherein responsive to the server determining the requested file is designated to be in a main directory, the operations instruct the server to return the requested file to the client from the main directory.

9. The system of claim 8, further comprising wherein responsive to the server determining the requested file is not designated to be in a main directory, the operations instructing the server to return an error message to the client.

10. A system that maintains objects created a modified within designated directories on a per-client basis in a network filesystem comprising:

a file server having a local processor, memory operably connected to the local processor, a filesystem including main directories loaded into the memory, and a list of operations loaded into the memory;

at least one client operably connected to the server having a remote processor and memory operably connected to the remote processor;

wherein the file server has designated at least one of the main directories as a per-client writable directory;

wherein the file server has exported the filesystem read-only to at least one client;

wherein responsive to a client requesting to write a file, the operations instruct the server to determine if the file is designated to be in a per-client writable directory; and

wherein responsive to the server determining the requested file is designated to be in a per-client writable directory, the operations instruct the server to write the requested file to the filesystem in the per-client writable directory.

11. The system of claim 10, further comprising:

wherein responsive to the server determining the requested file is designated to be in a per-client writable directory, the operations instruct the server to determine if the per-client writable directory exists; and

wherein responsive to the server determining the per-client writable directory does not exist, the operations instruct the server to create a per-client writable directory in the file system before writing the requested file to the filesystem in the designated per-client writable directory.

12. The system of claim 11, further comprising wherein responsive to the server determining the requested file is not designated to be in a per-client writable directory, the operations instructing the server to return an error message to the client.

13. A computer program product for maintaining objects created a modified within designated directories on a per-client basis in a network filesystem comprising:

a computer readable medium;

first program instructions to designate at least one main directory on a file server having a plurality of main directories comprising a filesystem as a per-client writable directory;

second program instructions to export the filesystem read-only to at least one client operably connected to the file server;

third program instructions for the file server to determine responsive to a client requesting to read a file if the file is designated to be in a per-client writable directory; and

fourth program instructions for the file server to return the requested file to the client from the per-client writable directory responsive to the file server determining the requested file is designated to be in a per-client writable directory.

14. The computer program product of claim 13, further comprising:

fifth program instructions for the file server to determine if the requested file is designated to be in a main directory responsive to the file server determining the requested file is not in a per-client writable directory; and

sixth program instructions for the file server to return the requested file to the client from the main directory responsive to the file server determining the requested file is designated to be in a main directory.

15. The computer program product of claim 14, further comprising seventh program instructions for the file server to return an error message to the client responsive to the file server determining the requested file is not designated to be in a main directory.