libcorosync-dev 2.3.4-0ubuntu1 (amd64 binary) in ubuntu vivid

 The corosync project is a project to implement a production quality
 "Revised BSD" licensed implementation of all core functionalities
 required by openais. The project implements cutting edge research
 on virtual synchrony to provide 100% correct operation in the face of
 failures or partitionable networks with excellent performance
 characteristics.
 .
 The Application Interface Specification is a software API and policies
 which are used to develop applications that maintain service during
 faults.
 .
 This package used to contain the Corosync development files and
 remains as a transitional package to pull the real files in.