Author: Rohit Jain

Software Engineer at Meta

RaptorX: Building a 10X Faster Presto
By James Sun, Ke Wang, Rohit Jain, Saksham Sachdev, Shixuan Fan, Bin Fan, Zhenxiao Luo & Lu Niu February 4, 2021September 21, 2023
RaptorX is an internal project name aiming to boost query latency significantly beyond what vanilla Presto is capable of. This blog post introduces the hierarchical cache work, which is the key building block for RaptorX. With the support of the cache, we are able to boost query performance by 10X. This new architecture can beat…
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Improving Presto Latencies with Alluxio Data Caching
By Rohit Jain June 16, 2020September 21, 2023
The Facebook Presto team has been collaborating with Alluxio on an open source data caching solution for Presto. This is required for multiple Facebook use-cases to improve query latency for queries that scan data from remote sources such as HDFS. We have observed significant improvements in query latencies and IO scans in our experiments. We…
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