US 12,001,396 B2
File storage and computer system
Tomoki Shimizu, Tokyo (JP)
Assigned to HITACHI, LTD., Tokyo (JP)
Filed by Hitachi, Ltd., Tokyo (JP)
Filed on Sep. 23, 2021, as Appl. No. 17/482,642.
Claims priority of application No. 2020-214067 (JP), filed on Dec. 23, 2020.
Prior Publication US 2022/0197864 A1, Jun. 23, 2022
Int. Cl. G06F 16/00 (2019.01); G06F 16/16 (2019.01); G06F 16/174 (2019.01); G06F 16/182 (2019.01); H04L 67/06 (2022.01)
CPC G06F 16/16 (2019.01) [G06F 16/1744 (2019.01); G06F 16/1827 (2019.01); H04L 67/06 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A file storage, that is coupled to a data storage storing data, and that manages a first file, wherein the data storage compresses and stores data of the first file, the file storage comprising:
a processor; and
a memory storing instructions that when executed by the processor configures the processor to:
update a part of the first file with update data,
transmit a first request to the data storage to decompress the compressed first file stored on the data storage,
create a second file, which is different than the first file, and is the updated part of the first file,
compress the second file and transmit the compressed second file to the data storage,
transmit a second request to the data storage to decompress the compressed second file,
transmit a third request to divide the decompressed first file into at least two non-updated parts, the third request including a division position of the decompressed first file,
transmit a fourth request to create an updated uncompressed file consisting of the at least two non-updated parts and the decompressed second file, and
transmit a fifth request to compress the updated uncompressed file and store in a compressed state.