METHOD, APPARATUS, PROGRAM AND SYSTEM FOR MIGRATING NAS SYSTEM
First Claim
1. A file migration method of an information system including a first NAS system, a second NAS system, and a computer for reading and writing a plurality of files stored in the first NAS system,wherein the file migration method of the information system includes file migration processing, and file migration termination processing to be executed after the execution of the file migration processing;
- wherein the file migration processing comprises;
a step of acquiring and storing first attribute information including file names and update time information concerning a plurality of files stored in a designated directory of the first NAS system;
a step of acquiring and storing second attribute information including file names and update time information concerning a plurality of files stored in the second NAS system;
a step of identifying a file to be copied from the first NAS system to the second NAS system based on the difference between the stored first attribute information and second attribute information, and a prescribed rule concerning the update time information of the first attribute information; and
a step of copying the identified file from the first NAS system to the second NAS system; and
wherein the file migration termination processing comprises;
a step of acquiring and storing third attribute information including file names and update time information concerning a plurality of files to be stored in a designated directory of the first NAS system;
a step of acquiring and storing fourth attribute information including file names and update time information concerning a plurality of files stored in the second NAS system based on the file migration processing; and
a step of identifying and copying a file to be copied from the first NAS system to the second NAS system based on the difference between the stored third attribute information and fourth attribute information.
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Accused Products
Abstract
In a state where the migration source NAS apparatus is continuously operated, a migration processing program confirms the update date and time of files stored in the migration source NAS apparatus, and migrates only the files that were not updated from a specific time to the start date and time of migration processing. Or, the migration processing program migrates the files stored in the migration source NAS apparatus sequentially from the oldest file. The migration performance is calculated based on the capacity and migration time of the migrated files, and the time required for migrating the non-migrated files is calculated based on the size and migration performance of the non-migrated files.
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Citations
19 Claims
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1. A file migration method of an information system including a first NAS system, a second NAS system, and a computer for reading and writing a plurality of files stored in the first NAS system,
wherein the file migration method of the information system includes file migration processing, and file migration termination processing to be executed after the execution of the file migration processing; -
wherein the file migration processing comprises; a step of acquiring and storing first attribute information including file names and update time information concerning a plurality of files stored in a designated directory of the first NAS system; a step of acquiring and storing second attribute information including file names and update time information concerning a plurality of files stored in the second NAS system; a step of identifying a file to be copied from the first NAS system to the second NAS system based on the difference between the stored first attribute information and second attribute information, and a prescribed rule concerning the update time information of the first attribute information; and a step of copying the identified file from the first NAS system to the second NAS system; and wherein the file migration termination processing comprises; a step of acquiring and storing third attribute information including file names and update time information concerning a plurality of files to be stored in a designated directory of the first NAS system; a step of acquiring and storing fourth attribute information including file names and update time information concerning a plurality of files stored in the second NAS system based on the file migration processing; and a step of identifying and copying a file to be copied from the first NAS system to the second NAS system based on the difference between the stored third attribute information and fourth attribute information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A migration computer coupled to a first NAS system coupled to a computer, and a second NAS system, for migrating a plurality of files stored in a designated directory and below of the first NAS system to the second NAS system, comprising:
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a processor; an I/O port; and a storage area; wherein the storage area further stores; first attribute information including file names and update time information concerning a plurality of files to be stored in a designated directory of the first NAS system; second attribute information including file names and update time information concerning a plurality of files stored in the second NAS system; and a program for causing the processor to identify a file to be copied from the first NAS system to the second NAS system based on the difference between the stored first attribute information and second attribute information, and a prescribed rule concerning the update time information of the first attribute information, and copy the file identified with the I/O port. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A program of a migration computer,
wherein the program causes the migration computer to: -
acquire and store first attribute information including file names and update time information concerning a plurality of files to be stored in a designated directory of a first NAS system coupled to the migration computer; acquire and store second attribute information including file names and update time information concerning a plurality of files stored in the second NAS system coupled to the migration computer; identify a file to be copied from the first NAS system to the second NAS system based on the difference between the stored first attribute information and second attribute information, and a prescribed rule concerning the update time information of the first attribute information; copy the identified file from the first NAS system to the second NAS system; and acquire and store third attribute information including file names and update time information concerning a plurality of files to be stored in a designated directory of the first NAS system; acquire and store fourth attribute information including file names and update time information concerning a plurality of files stored in the second NAS system; and identify and copy one or more files to be copied from the first NAS system to the second NAS system based on the difference between the stored third attribute information and fourth attribute information. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification