V Workshop de Sistemas Operacionais, Belém, PA, 2008. Parabéns aos autores Eduardo Colaço (UFCG), Marcelo Iury S. Oliveira (UFCG), Alexandro Soares (UFCG), Dalton Serey Guerrero (UFCG) e Francisco Brasileiro (UFCG). Veja a seguir o resumo do artigo:
"The high churn and low bandwidth characteristics of peer-to-peer (P2P) backup systems make recovery a time consuming activity that increases system's outage. This is especially disturbing from the user perspective, because during outage the user is prevented from carrying out useful work. Nevertheless, at any given time, a user typically requires only a small fraction of her data to continue working. If the backup system is able to quickly recover such files, then the system's outage can be greatly reduced, even if a large portion of the data lost is still being recovered. In this paper, we evaluate the use of a file system working set model to support efficient recovery of a P2P backup system. By exploiting a simple LRU-like working set model, we have designed a recovery mechanism that substantially reduces outage and allows the user to return faster to work. The simulations we have performed show that even this simple model is able to reduce the outage by as much as 80%, when compared to the state-ofpractice in P2P backup recovery."