Improving Data Consistency in Mobile Computing Using
Qi Lu and M. Satyanarayanan
Disconnected operation is an important technique for providing mobile access
to shared data in distributed file systems. However, data inconsistency
resulting from partitioned sharing remains a serious concern. This paper
presents a new mechanism called isolation-only transaction(IOT) that uses
serializability constraints to automatically detect read/write conflicts.
The IOT consistency model provides a set of options for automatic and manual
conflict resolution. In addition, application specific knowledge can be
incorporated to detect and resolve conflicts. To preserve upward Unix compatibility,
the IOT mechanism is provided as an optional file system facility and its
flexible interfaces allow any existing Unix application to be executed
as an IOT. This paper describes high level system design and implementation
and concludes with related work and current status.