1. Introduction

The LOCKSS system is a distributed digital preservation software system developed by the LOCKSS Program, a division of the Digital Library Systems and Services department at Stanford University Libraries.

The 2.x series of the LOCKSS system stems from the LAAWS (LOCKSS Architected As Web Services) initiative, an ambitious modernization project that includes rewriting the classic LOCKSS daemon as a suite of containerized components, funded in part by a grant from the Andrew W. Mellon Foundation.

This version, LOCKSS 2.0-alpha4, is the fourth preview release on the road to LOCKSS 2.0.