DATA REARRANGEMENT DEVICE AND METHOD AND PROGRAM

PROBLEM TO BE SOLVED: To prevent the deterioration of the reading performance of an external application.SOLUTION: In a data rearrangement device, method and program in a division file system in which file data to be written by an external application are divided into blocks having fixed length, and...

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Bibliographic Details
Main Authors SATO KOJI, YAMAMOTO KOYO, ICHIYANAGI YOSHIMI, OIKAWA KAZUKI
Format Patent
LanguageEnglish
Japanese
Published 02.02.2015
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To prevent the deterioration of the reading performance of an external application.SOLUTION: In a data rearrangement device, method and program in a division file system in which file data to be written by an external application are divided into blocks having fixed length, and stored in servers as many as the predetermined number of the redundancy, rearrangement priority indicative of priority in data rearrangement processing for leveling the storage usage rates of the servers is applied to each block, and when data rearrangement processing is performed, the block being the object of the execution of the data rearrangement processing is selected on the basis of the applied rearrangement priority. 【課題】外部アプリケーションの読み出し性能の低下を防止する。【解決手段】外部アプリケーションが書き込むファイルデータを固定長のブロックに分割して予め定められた冗長度の数のサーバに格納する分割ファイルシステムにおけるデータ再配置装置、方法およびプログラムを提供する。サーバのストレージ使用率を平準化するためのデータ再配置処理における優先度を示す再配置優先度をブロック各々に付与しておき、データ再配置処理を行う際に、付与されている再配置優先度に基づいて、データ再配置処理を実行する対象となるブロックを選択する。【選択図】図１
Bibliography:Application Number: JP20130147463