PLANET got accepted at SIGMOD 2014
The Brown Data Management Group has the following paper in SIGMOD:
- PLANET: making progress with commit processing in unpredictable environments
Latency unpredictability in a database system can come from many factors, such as load spikes in the workload, inter-query interactions from consolidation, or communication costs in cloud computing or geo-replication. High variance and high latency environments make developing interactive applications difficult, because transactions may take too long to complete, or fail unexpectedly. We propose Predictive Latency-Aware NEtworked Transactions (PLANET), a new transaction programming model and underlying system support to address this issue. The model exposes the internal progress of the transaction, provides opportunities for ap- plication callbacks, and incorporates commit likelihood prediction to enable good user experience even in the presence of significant transaction delays. The mechanisms underlying PLANET can be used for admission control, thus improving overall performance in high contention situations. In the SIGMOD 2014 paper “PLANET: Making Progress with Commit Processing in Unpredictable Environments”, we present this new transaction programming model, demonstrate its expressiveness via several use cases, and evaluate its performance using a strongly consistent geo-replicated database across five data centers.