Fujitsu Corporation

Daisuke Ninomiya

Naoki Hashimoto

Ryo Matsumura

Takaki Ozawa

Kazuhiro Taniguchi

Toshirou Ono

Masahiro Higuchi

Masaki Nishigaki

Takashi Tokuda

Junji Kawai

Yutaka Koyama

A server system includes a primary server, at least one synchronous backup server, and at least one asynchronous backup server. The primary server includes a first processor. The at least one synchronous backup server, each includes a second processor configured to back up data of the primary server in a synchronous manner. The at least one asynchronous backup server, each includes a third processor configured to back up data of the primary server in an asynchronous manner. The first processor is configured to control each of one or more of the at least one asynchronous backup server to operate as a synchronous backup server when a number of the at least one synchronous backup server decreases due to a failure in at least one server included in the server system.

Server system and method of switching server

A disclosed data structure of a phrase tree includes, as data of each node in the phrase tree, a data block including a first area for holding a code for a character or a character string, a second area for holding, for each character that will be used, an appearance sequential number of a second character that appears next to the character or the character string, and a third area for holding, according to the appearance sequential number, a number of appearances or a code corresponding to a character string comprising the character or the character string and the second character when the number of appearances exceeds a threshold.

Code processing technique

Growing community of inventors

Kobe, Japan

Daisuke Ninomiya