File archival

Details File archival File archival

2001-04-13

2009-06-09

Woo, Isaac M (Department: 2166)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000, C707S793000

Reexamination Certificate

active

07546305

ABSTRACT:
Archival in a computer is performed by creating a process if an item to be copied is a directory, and alternatively by copying the item if the item is a file. The created process in turn recursively performs the just-described acts, e.g. the act of creating or copying, with another item located in the just-described directory. Therefore, depending on the number of directories to be copied, a corresponding number of processes may be created, which speeds up copying. A default limit on a resource available to a copy process may be set to a maximum limit for the resource, for speedy copying. Archival may be speeded up by transferring data from the file into a temporary buffer, locking the temporary buffer, and invoking a direct memory access (DMA) process. Archival may be speeded up also by checking for and eliminating the copying of circular links (such as a symbolic link that points to itself). Such a created process may send an email message if a resource at a destination is full, and wait to be restarted subsequent to sending the email message. A user that receives the email message makes appropriate arrangements (e.g. deletes files in a destination disk or loads a new disk), and therafter restarts the stopped process. On being restarted, the process recopies a file if it was in the middle of copying the file when it was stopped.

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