Analysis of a Transaction System with Checkpointing, Failures and Rollback

Kumar, L; Misra, M; Mitrani, I

doi:10.1007/3-540-46029-2_21

Analysis of a Transaction System with Checkpointing, Failures and Rollback

Lookup NU author(s): Emeritus Professor Isi Mitrani

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Abstract

We consider a system where transactions are processed by a single server subject to faults and recovery. A checkpoint is attempted after a fixed number of transactions have been completed, and takes some time to establish. The occurrence of a fault causes a rollback to the last checkpoint, after which all intervening transactions are reprocessed. The system is modelled by a two-dimensional Markov process with one unbounded variable (the number of transactions in the queue), and one bounded variable (the number of transactions processed since the last checkpoint). The joint steady-state distribution of the process, and hence the performance measures of interest, is found by two different methods: generating functions and spectral expansion. The problem of determining the optimal checkpointing parameter is considered.