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This new release adds support for streaming backups (removing the need for SSH connections altogether) and introduces "zero data loss" backups for PostgreSQL 9.4/9.5/9.6.
Streaming backup also makes integration with Docker easier and adds experimental support to backup of PostgreSQL on Windows systems too.
Barman is a backup and recovery manager for PostgreSQL databases that is distributed under GNU GPL 3.
I posted an article about this release on our blog: http://blog.2ndquadrant.com/the-best-barman-ever/
Information on this release are here: http://www.pgbarman.org/barman-2-0-released/