Processing of Read-Only Queries at a Remote Backup

Abstract:

Remote backup systems are often used to provide high data
availability. Updates are typically propagated to the backup via a
log, which decouples the backup from the primary. We show that this
decoupling can lead to efficient installation of updates in batches and
efficient processing of read-only queries, by eliminating or reducing
access conflicts between updates and queries. We present several
methods for query processing at the backup and evaluate their
performance analytically.