This year, Twitter open sourced two powerful real-time analytics tools -- DistributedLog, a high-performance log service, and Heron, a distributed stream computation system.

A few weeks after Heron was open sourced, Karthik Ramasamy, engineering manager and technical lead for real-time analytics at Twitter, delivered a talk at Strata + Hadoop World in London to unveil the system and discuss:

• An overview of Heron as a micro stream engine and its architectural components
• How Twitter has been running Heron in production
• The operational experience and challenges of running Heron at scale, including a discussion of stragglers
• Heron's minimal resource usage and performance numbers

Leading up to Twitter's open sourcing of DistributedLog, software engineer and tech lead of the DistributedLog project Sijie Guo spoke at Strata + Hadoop World in San Jose to introduce the service. Key components of his talk include:

• Why Twitter built DistributedLog
• Technical decisions and challenges behind building DistributedLog
• How Twitter uses DistributedLog to support different workloads
• How Twitter runs the same software stack in multiple data centers to achieve global consistency