File managing method
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTakaaki Ando, Mitsunori Kori, Manabu Michishita, Takayuki Hayakawa, Keiji Yoshimura
Life of this patent
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Abstract
A file managing method includes subdividing an original file including records, each record including fields, for storing blocks, each block including fields subdivided from more than one of the records; coupling the blocks to into groups of blocks; rearranging the groups of blocks, and, after rearranging the groups of blocks, coupling the groups of blocks to each other to produce a transposed file; and accessing the fields from the transposed file, at random.
Claims15
A file managing method comprising:
- subdividing an original file including a plurality of records, each record including a plurality of fields, for storing a plurality of blocks, each block including a plurality of fields subdivided from a plurality of the records;
- coupling the blocks into groups of blocks;
- rearranging the groups of blocks, and, after rearranging the groups of blocks, coupling the groups of blocks to each other to produce a transposed file;
- and
- accessing the fields from the transposed file, at random.
A file managing method comprising:
- subdividing an original file including a plurality of records, each record including a plurality of fields, for storing a plurality of blocks, each block including a plurality of fields subdivided from a plurality of the records;
- coupling the blocks into groups of blocks;
- storing the groups of blocks in a plurality of disk apparatus for respective numbers of the groups of blocks;
- and
- accessing the respective disk apparatus in parallel to access the original file.
A file managing method comprising:
- from an original file including a plurality of records, each record including a plurality of fields, grouping respective fields for a number of records as blocks;
- coupling the blocks for each of the fields into groups of blocks;
- coupling a plurality of the groups of blocks to each other to produce a transposed file including all of the records of the original file;
- and
- utilizing the transposed file to output a selective one of the fields.
A file managing method comprising:
- from an original file including a plurality of records, each record including a plurality of fields, grouping respective fields for a number of records as blocks;
- coupling the blocks for each of the fields into groups of blocks;
- storing the groups of blocks in respective memory disk apparatus;
- and
- accessing the respective disk apparatus in parallel to output a selected field.
Dependencies are inferred from the claim text.