MEMORY SYSTEM AND MEMORY CONTROL METHOD

• Main Authors: MASUDA NAOYUKI, YOSHIHARA TOMOHIRO, MATSUSHITA TAKAKI, TATSUMI RYOSUKE, YAMAGA YUSUKE
• Format: Patent
• Language: Chinese; English
• Published: 24.05.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention provides a storage system and a storage control method, which can change an address map in a short time even if an address is changed for duplicate data of a plurality of snapshot groups including a PVOL and an SVOL as a snapshot of the PVOL. A snapshot virtual device is prepared for each snapshot family, and a deduplication virtual device is prepared separately from the snapshot virtual device. And under the condition that the same data exists in a plurality of VOLs of the snapshot family, the storage system maps a plurality of addresses of the same data in the plurality of VOLs to the address of the snapshot virtual equipment of the snapshot family. And under the condition that duplicate data exist in the more than two snapshot virtual devices, the storage system maps more than two addresses of the duplicate data in the more than two snapshot virtual devices to addresses corresponding to the duplicate data in the duplicate removal virtual device. 本发明提供一种存储系统以及存储控制方法，分别针对包含PVOL和作为其快照的SVOL的多个快照族