Tech Lead at Cloud SQL for PostgreSQL

Building a VM-aware Clustering System to aggregate data from Storage Appliances and manage VM’s protection, relocate policies to make sure efficiency and reliability of IO/Space/Flash.

Transparent Failover: Implemented Synchronous Replication Service Group to realize zero RPO for VMs.

VM Scale-out: Built a service to use predictive algorithms (Monte Carlo, Linear regression, KMeans, LogNormal) to find out space/IOLoad/flash imbalanced appliances, then select and relocate VMs to reach overall Load Balance.

200k VM support: Split Aggregator into small aggregators to reduce lock held time and increase throughput of the message queue. Tuned and refactored thread pool to reduce threads coordination time.

Policy Stickiness: Designed a State Machine to carry over VM protection policies after VM migration.

REST API: Responsible for products’ REST API review, maintenance and version compatibility.

Two-time Tintri Hackathon Winner!

08-722 Data Structures for Application Programmers

Built a simulated appliance to hijack real-time API requests and return mapped historical phone home data.

Designed a multipath routing algorithm based on queue management, Dijkstra and BFS

Performed topology simulation and routing layer network traffic by NS2

Over 50% improvement on link delay, congestion queue length and throughput