About me: I am a Ph.D. student in the Computer Science Department at UC Santa Barbara and a member of the Distributed Systems Lab (DSL). I work at the intersection of data management and distributed systems in the area of Global-Scale Data Management. Also, I have worked in collaboration with HP Labs and Microsoft Research in the area of data management on emerging hardware technology.

Research Statement - Teaching Statement - C.V.
2017 Invited talks: Georgia Tech, University of Illinois at Urbana–Champaign, Yale, University of Minnesota, University of California Santa Cruz, Texas A&M, University of Arizona, Buffalo, and Northeastern.

Research Statement: Data processing is the driver of the sustained growth and impact of Internet services and Big Data analytics. The global nature of users and data invites a Global-Scale Data Management paradigm. In my work, I study and build global-scale systems with a focus on providing high performance and easy-to-use database abstractions.

Looking forward, two trends in computing will increase the demand on Global-Scale Data Management drastically and will ignite a transformation of data management systems. The first trend is the emergence of Device-driven systems for autonomous applications, Internet of Things (IoT), and mobile agents (self-driving cars and robotics). The second trend is the emergence of Data-driven applications such as data science and machine learning. My ongoing work explores the opportunities and challenges in supporting the increasing demand of device-driven systems by augmenting data management systems with edge computing technology to increase and diversify resources. Also, I explore domain-specific system designs to support the complexity of emerging data-driven applications.
Click here for more about my work on global-scale data management

Projects and publications

Global-Scale Data Management: The global nature of data and users makes distributing databases and systems a natural step towards a better user experience and higher performance. Additionally, it provides higher levels of fault-tolerance. My work in this area investigate the challenges in building global-scale data management systems.

[20] COP: Planning Conflicts for Faster Parallel Transactional Machine Learning
(EDBT 2017)

[19] The Challenges of Global-scale Data Management
(SIGMOD 2016 Tutorial) [pptx]

[18] DB-Risk: The Game of Global Database Placement
(SIGMOD 2016 Demo) [demo]

[17] Minimizing Commit Latency of Transactions in Geo-Replicated Data Stores
(SIGMOD 2015)

[16] Chariots : A Scalable Shared Log for Data Management in Multi-Datacenter Cloud Environments
(EDBT 2015)

[15] Mind your Ps and Vs: A perspective on the challenges of big data management and privacy concerns
(BigComp 2015)

[14] Message Futures: Fast Commitment of Transactions in Multi-datacenter Environments.
(CIDR 2013)

[13] Low-Latency Multi-Datacenter Databases using Replicated Commits.
(VLDB 2013)

[12] Managing Geo-replicated Data in Multi-datacenters.
(Springer Databases in Networked Information Systems 2013)

[11] Serializability, not Serial: Concurrency Control and Availability in Multi-Datacenter Datastores.
(VLDB 2012)

Data processing on emerging memory technology: In collaboration with HP Labs, I worked on designing data stores for non-volatile memory architectures. I studied the implications of emerging flush-on-fail CPU technology on the durability cost of transactions. Also, as an intern in MSR Redmond I worked on the Time-Split Bw-tree (TSBw-tree) that integrates the algorithms of the Time-split B-tree within the lock-free implementation of the Bwtree.

[10] High Performance Temporal Indexing on Modern Hardware
(ICDE 2015)

[9] Procrastination Beats Prevention: Timely Sufficient Persistence for Efficient Crash Resilience
(EDBT 2015)

[8] Zero-Overhead NVM Crash Resilience.
(FAST 2015 WiP Session + Poster session)

[7] Zero-Overhead NVM Crash Resilience
(NVMW 2015)

Fair resource allocation for Wireless Mesh Networks: This project tackles the problem of unfairness in Wireless Mesh Networks, where TCP flows experience different performance characteristics depending on their location in the network. A MAC-layer solution is developed to transparently improve TCP fairness. The proposed MAC layer, called TMAC, uses a timestamp-ordering technique to achieve fairness.

[6] Fair Packet Scheduling in Wireless Mesh Networks.
(Elsevier Journal of Ad Hoc Networks 2014)

[5] MAC-Layer Protocol for TCP Fairness in Wireless Mesh Networks.
(ICCC 2012)

[4] TMAC: Timestamp-ordered MAC for CSMA/CA Wireless Mesh Networks.
(ICCCN 2011)

[3] TMAC: Timestamp-Ordered MAC Protocol for Wireless Mesh Networks.
(MS Thesis 2011)

Other work on large-scale data processing

[2] Graph Summarization for Geo-correlated Trends Detection in Social Networks
(SIGMOD 2016 Undergraduate Research Poster Competition)

[1] MaaT: Effective and scalable coordination of distributed transactions in the cloud.
(VLDB 2014)