Providing read committed isolation level in non-blocking ROWA database replication protocols
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Abstract
Abstract. Total order ROWA strategies are widely used in replicated protocol design. Normally, these protocols provide higher isolation guarantees like Serialisable or Snapshot Isolation but, for some applications, a more permissive isolation level like Read Committed fits better. Some centralised database management systems provide Read Committed as a default isolation level but in replicated systems it is rare to find proposals and systems supporting it. In this paper we extend the notion of Read Committed to a replicated environment, giving the necessary theoretical background to construct Read Committed ROWA database replication protocols.