Stored Procedures

Not Supported

Views

Not Supported

System Architecture

Shared-Nothing

Indexes

Bw-Tree

As soon as the data is ingested into the system, all of the data is synchronously indexed and made durable and highly available. The internal Meta-data service, which is part of Cosmos maintains file extent locations similar to HDFS name node. It indexes all of the meta-data by using Hekaton, an in-memory database. Updates to the meta-data state is done using SQL transactions on Hekaton with the help of lock-free indexes such as Bw-Trees. The updates are propogated to other nodes by using RSL-HK rings.