Efficient Logging and Replication Techniques for Comprehensive Data Protection

Mariner is an iSCSI-based storage system that is de­ signed to provide comprehensive data protection on com­ modity ATA disk and Gigabit Ethernet technologies while offering the same performance as those without any such protection. In particular, Mariner supports continuous data protection (CDP) that allows every disk update within a time window to be undoable, and 10caUremote mirroring to guard data against machine/site failures. To minimize the performance overhead associated with CD?, Mariner employs a modified track-based logging technique that uni­ fies the long-term logging requiredfor CDP and short-term logging for low-latency disk writes. This new logging tech­ nique strikes an optimal balance among log space utiliza­ tion, disk write latency, and ease of historical data access. To reduce the performance penalty ofphysical data repli­ cation used in 10caUremote mirroring, Mariner features a modified two-phase commit protocol that in turn is built on top ofa novel transp...

• Type: Conference
• Year: 2007
• Where: MSS
• Authors: Maohua Lu, Shibiao Lin, Tzi-cker Chiueh
• Keywords: Ata Disks, Data Protection, Internet Technology, Mariner, MSS 2007