Sciweavers

Share
COMAD
2009

Consistency of Databases on Commodity Disk Drives

11 years 2 months ago
Consistency of Databases on Commodity Disk Drives
Most database systems use ARIES-like logging and recovery scheme to recover from failures and guarantee transactional consistency. ARIES relies on the Write-Ahead Logging (WAL) protocol which requires that log records be written durably prior to the corresponding data changes. In order to enforce WAL, database systems rely on the write-through capability of the storage media. While SCSI disks that are commonly deployed in enterprise servers support write-through, commodity hard drives do not. In the past, database systems were mostly limited to enterprise servers; however, today they are being heavily deployed in large-scale internet services and personal information management systems. In order to minimize costs, these systems use commodity hard drives that have controller caches and lack write-through. These drives delay and reorder the writes thereby breaking the WAL protocol recovery is based on. Here we present a solution to enforce WAL and guarantee recoverability of the databas...
Robin Dhamankar, Hanuma Kodavalla, Vishal Kathuria
Added 09 Nov 2010
Updated 09 Nov 2010
Type Conference
Year 2009
Where COMAD
Authors Robin Dhamankar, Hanuma Kodavalla, Vishal Kathuria
Comments (0)
books