Issue 2 of Volume 14 of the Proceedings of the VLDB Endowment (PVLDB) is now available electronically at the VLDB website:

This issue consists of the following papers that have been accepted for the research track of VLDB 2021 in Copenhagen, Denmark in October 2020:

- Tsunami: A Learned Multi-dimensional Index for Correlated Data and Skewed Workloads
Jialin Ding, Vikram Nathan, Mohammad Alizadeh, Tim Kraska

- Jointly Optimizing Preprocessing and Inference for DNN-based Visual Analytics
Daniel Kang, Ankit Mathur, Teja Veeramacheneni, Peter Bailis, Matei Zaharia

- Permutable Compiled Queries: Dynamically Adapting Compiled Queries without Recompiling
Prashanth Menon, Amadou Ngom, Todd Mowry, Andrew Pavlo, Lin Ma

- EMOGI: Efficient Memory-access for Out-of-memory Graph-traversal In GPUs
Seung Won Min, Vikram Sharma Mailthody, Zaid Qureshi, Jinjun Xiong, Eiman Ebrahimi, Wen-Mei Hwu

- On-Off Sketch: A Fast and Accurate Sketch on Persistence
Yinda Zhang, Jinyang Li, Yutian Lei, Tong Yang, Zhetao Li, Gong Zhang, Bin Cui

- Real-Time Distance-Based Outlier Detection in Data Streams
Luan Tran, Min Mun, Cyrus Shahabi

- Seagull: An Infrastructure for Load Prediction and Optimized Resource Allocation
Olga Poppe, Tayo Amuneke, Dalitso Banda, Aritra De, Ari Green, Manon Knoertzer, Ehi Nosakhare, Karthik Rajendran, Deepak Shankargouda, Meina Wang, Alan Au, Carlo Curino, Qun Guo, Alekh Jindal, Ajay Kalhan, Morgan Oslake, Sonia Parchani, Vijay Ramani, Raj Sellappan, Saikat Sen, Sheetal Shrotri, Soundararajan Srinivasan, Ping Xia, Shize Xu, Alicia Yang, Yiwen Zhu

- On the Efficiency of K-Means Clustering: Evaluation, Optimization, and Algorithm Selection
Sheng Wang, Yuan Sun, Zhifeng Bao

- RapidMatch: A Holistic Approach to Subgraph Query Processing
Shixuan Sun, Xibo Sun, Yulin Che, Qiong Luo, Bingsheng He

- Taurus: Lightweight Parallel Logging for In-Memory Database Management Systems
Yu Xia, Xiangyao Yu, Andrew Pavlo, Srinivas Devadas

- Improving Execution Efficiency of Just-in-time Compilation based Query Processing on GPUs
Johns Paul, Bingsheng He, Shengliang Lu, Chiew Tong Lau

- PPQ-Trajectory: Spatio-temporal Qantization for Qerying in Large Trajectory Repositories
Shuang Wang, Hakan Ferhatosmanoglu

- Aggregated Deletion Propagation for Counting Conjunctive Query Answers
Xiao Hu, Shouzhuo Sun, Shweta Patwa, Debmalya Panigrahi, Sudeepa Roy

Best regards,

Thorsten Papenbrock, HPI, Germany
Hannes Muehleisen, CWI, The Netherlands
VLDB 2021 Proceedings Chairs