@techreport{TR-IC-08-34,
  number = {IC-08-34},
  author = {Gustavo  M.  D. Vieira and Willy Zwaenepoel and Luiz
                  E. Buzato}, 
  title = {Dynamic Content Web Applications: Crash, Failover, and
                  Recovery Analysis},
  month = {December},
  year = {2008}, 
  institution = {Institute of Computing, University of Campinas},
  note = {In English, 21 pages.
    \par\selectlanguage{english}\textbf{Abstract}
      This  work  assesses  how  crashes  and  recoveries  affect  the
      performance  of a  replicated dynamic  content  web application.
      RobustStore  is  the  result  of  retrofitting  TPC-W's  on-line
      bookstore  with Treplica, a  middleware for  building dependable
      applications. Implementations of Paxos and Fast Paxos are at the
      core of Treplica's efficient and programmer friendly support for
      replication and  recovery.  The TPC-W  benchmark, augmented with
      faultloads and  dependability measures, is used  to evaluate the
      behaviour  of RobustStore.   Experiments  apply faultloads  that
      cause sequential and  concurrent replica crashes.  RobustStore's
      performance drops by less than 13\% during the recovery from two
      simultaneous  replica  crashes.  When  subject  to an  identical
      faultload and  a shopping workload, a  five replicas RobustStore
      maintains an accuracy of 99.999\%.  Our results display not only
      good performance, total autonomy and uninterrupted availability,
      they also  indicate that Treplica simplifies  the programming of
      application recovery, a great  benefit for programmers of highly
      available applications.
  }
}