초록 ▼

Provided is a method for implementing a file system that includes a combination of read-only and read/write parts. A file system located on a data server maintains an original copy of a data store. An “Ephemeral” file system (EFS) is created on a client computer. The data server is contacted only on

Provided is a method for implementing a file system that includes a combination of read-only and read/write parts. A file system located on a data server maintains an original copy of a data store. An “Ephemeral” file system (EFS) is created on a client computer. The data server is contacted only once for each file accessed and the copy is in an original state each time the system is mounted. Changes made to the file system by one client are not seen by other clients. The EFS maintains the file system state in memory and uses the NFS server as a backing stored for cached file data. File data for files created on the client are backed up by the client system's swapping space.

대표청구항 ▼

1. A method for the management of memory in a computing system, comprising: mounting a remote file system on a computing system;receiving an instruction to read a file of the remote file system;determining whether or not the file was created after the mounting;if determined that the file was created

1. A method for the management of memory in a computing system, comprising: mounting a remote file system on a computing system;receiving an instruction to read a file of the remote file system;determining whether or not the file was created after the mounting;if determined that the file was created after the mounting, reading the file from a memory local to the computing system; andotherwise: determining whether or not the file has been modified after the file was mounted; andif determined that the file has been modified, reading the file from the memory; andotherwise, reading the file from the remote file system. 2. The method of claim 1, further comprising: receiving, an instruction to write to the file;if determined that a copy is stored in the memory on the computing system, writing to the copy stored in the memory; andotherwise: writing a copy of the file to the memory;writing to the copy;and freeing a link to the remote file system corresponding to the file. 3. The method of claim 2, further comprising directing subsequent operations on the file to the copy of the file stored in memory. 4. The method of claim 1, further comprising: creating an object for addition in a file tree corresponding to the mounted remote file system;creating a node in the file tree corresponding to the object;assigning attributes to the object;determining whether or not the object is a directory;if the object is determined to be a directory, marking the object as a know directory; andif the object is determined not to be a directory, marking the object as a file. 5. The method of claim 1, wherein the remote file system is a Network File System (NFS). 6. The method of claim 1, wherein, when written to memory, the file is written to the swap space of the computing system. 7. The method of claim 6, wherein the remote file system is employed as a backup store for cached data associated with the remote file system. 8. A computing system with efficient memory management, comprising: a processor;a memory coupled to the processor;logic, stored on the memory and executed on the processor, for: mounting a remote file system on a computing system;receiving an instruction to read a file of the remote file system:determining whether or not the file was created after the mounting;if determined that the file was created after the mounting, reading the file from a memory local to the computing system; andotherwise: determining whether or not the file has been modified after the file was mounted; andif determined that the file has been modified, reading the file from the memory; andotherwise, reading the file from the remote file system. 9. The system of claim 8, the logic further comprising logic for: receiving an instruction to write to the file;if determined that a copy is stored in the memory on the computing system, writing to the copy stored in the memory; andotherwise; writing a copy of the file to the memory;writing to the copy;and freeing a link to the remote file system corresponding to the file. 10. The system of claim 9, further comprising logic, stored on the memory and executed on the processor, for directing subsequent operations on the file to the copy of the file stored in memory. 11. The system of claim 8, further comprising logic, stored on the memory and executed on the processor for: creating an object for addition in a file tree corresponding to the mounted remote file system;creating a node in the file tree corresponding to the object;assigning attributes to the object;determining whether or not the object is a directory;if the object is determined to be a directory, marking the object as a know directory; andif the object is determined not to be a directory, marking the object as a file. 12. The system of claim 8, wherein the remote file system is a Network File System (NFS). 13. The system of claim 8, wherein, when written to memory, the file is written to the swap space of the computing system. 14. The system, of claim 13, wherein the remote file system is employed as a backup store for cached data associated with the remote file system. 15. A computer programming product, comprising: a computer readable storage medium;logic, stored on the computer readable storage medium for execution on a processor, for: mounting a remote file system on a computing system;receiving an instruction to read a file of the remote file system;determining whether or not the file was created after the mounting;if determined that the file was created after the mounting, reading the file from a memory local to the computing system; andotherwise: determining whether or not the file has been modified after the file was mounted; andif determined that the file has been modified, reading the file from the memory; andotherwise, reading the file from the remote file system. 16. The computer programming product, of claim 15, the logic further comprising logic for: receiving an instruction to write to the file;if determined that a copy is stored in the memory on the computing system, writing to the copy stored in the memory; andotherwise: writing a copy of the file to the memory;writing to the copy:and freeing a link to the remote file system corresponding to the file. 17. The computer programming product, of claim 16, further comprising logic, stored on the memory and executed on the processor, for directing subsequent operations on the file to the copy of the file stored in memory. 18. The computer programming product, of claim 15, further comprising logic, stored on the memory and executed on the processor for: creating an object for addition in a file tree corresponding to the mounted remote file system;creating a node in the file tree corresponding to the object;assigning attributes to the object;determining whether or not the object is a directory;if the object is determined to be a directory, marking the object as a know directory; andif the object is determined not to be a directory, marking the object as a file. 19. The computer programming product of claim 15, wherein, when written to memory, the file is written to the swap space of the computing system. 20. The computer programming product, of claim 19, wherein the remote file system is employed as a backup store for cached data associated with the remote file system.