Toast Lab has one technical paper accepted by the 44th IEEE International Conference on Computer Design (ICCD 2026). It is titled "Exitos: Reducing the Software Tax for Database Logging through a Shortcut I/O Path". It was solely done by Toast Labmates. Mr HU Yanpeng, Ms ZHU Li, and Mr YANG Yunxin are student authors of this paper. Chundong is the corresponding author.
Logging is a useful and critical technique widely used by databases. Database logging relies on file write and fsync, which have to traverse multiple software layers and pay heavy runtime tax to the underlying file system like Ext4 locating target data blocks and journaling modified file metadata. As the preallocation of storage space for a log file makes a stable file structure and avoids metadata changes, we develop Exitos, which reorganizes offset-to-block mappings per preallocated log file for quick lookup and creates a direct shortcut from database to device, bypassing almost all software layers. For non-preallocated log files, Exitos exploits Ext4’s move-extent feature to resemble a preallocationlike effect. Evaluation confirms that Exitos boosts throughput by 2.1x and 1.6x for OceanBase and MySQL, respectively.
In 2026, ICCD received over 50% more valid submissions as compared to last year, and the acceptance rate for regular (full) papers is 26% (144/549) under the double-blind reviewing policy. It will convene in Hong Kong, China during November 16-18, 2026.