Hyflow2: a high performance distributed transactional memory framework in scala
Proceedings of the 2013 International Conference on Principles and Practices of Programming on the Java Platform: Virtual Machines, Languages, and Tools
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We consider the closed nesting and checkpointing model for transactions in fault-tolerant distributed transactional memory (DTM). The closed nested model allows inner-nested transactions to be aborted (in the event of a transactional conflict) without aborting the parent transaction, while check pointing allows transactions to rollback to a previous execution state, potentially improving concurrency over flat nesting. We consider a quorum-based replicated model for fault-tolerant DTM, and present algorithms to support closed nesting and checkpointing. The algorithms use incremental validation to avoid communication overhead on commit, and ensure1-copy equivalence. Our experimental studies using a Java DTM implementation of the algorithms on micro and macro benchmarks reveal the conditions when they improve transactional throughput over flat nesting, and also their relative advantages and disadvantages.