Nagavamsi Ponnekanti

software engineer, Facebook

Software engineer in facebook database engineering team. Most recently worked on Online Shard Migration (OLM). Prior to that, worked on features such as online schema change (OSC) and hybrid incremental backup at Facebook.

Submitted Sessions

Facebook has a large MySQL deployment with thousands of instances. Online shard migration (OLM) is a utility for moving a logical database from one MySQL instance A (master) to another MySQL instance B (also a master) with near zero downtime. When the database is moved from one master A to another master B, it also moves from slaves of A to slaves of B.
There are at least two use cases... [read more]

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