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 show that it is simple to develop efficient recovery-oriented applications using Treplica. ©2009 IEEE. 229238Amza, C., Cox, A.L., Zwaenepoel, W., Distributed versioning: Consistent replication for scaling back-end databases of dynamic content web sites (2003) MiddlewareBurrows, M., The Chubby lock service for loosely-coupled distributed systems (2006) 7th USENIX Symp. on Operating Systems Design and ImplementationCain, H.W., Rajwar, R., Marden, M., Lipasti, M.H., An architectural evaluation of Java TPC-W (2001) Proc. of 7th Int. Symp. on High-Performance Computer ArchitectureCamargos, L., Pedone, F., Weiloch, M., Sprint: A middleware for high-performance transaction processing (2007) Proc. of 2nd European Conf. on Computer SystemsChang, F., Dean, J., Ghemawat, S., Hsieh, W.C., Wallach, D.A., Burrows, M., Chandra, T., Gruber, R.E., Bigtable: A distributed storage system for structured data (2008) ACM Trans. Comput. Syst, 26 (2), pp. 1-26T. P. Council. TPC-W Specification, Feb. 2002DeCandia, G., Hastorun, D., Jampani, M., Kakulapati, G., Lakshman, A., Pilchin, A., Sivasubramanian, S., Vogels, W., Dynamo: Amazon's highly available key-value store (2007) Proc. of 21st ACM SIGOPS Symp. on Operating Systems Principles, pp. 205-220X. De7acute;fago, A. Schiper, and P. Urbán. Total order broadcast and multicast algorithms: Taxonomy and survey. ACM Comput. Surv., 36(4):372-421, 2004Durães, J., Vieira, M., Madeira, H., Dependability bench-marking of web-servers (2004) Proc. of 23rd Computer Safety, Reliability, and Security Int. Conf, pp. 297-310Elnikety, S., Dropsho, S., Pedone, F., Tashkent: Uniting durability with transaction ordering for high-performance scalable database replication (2006) Proc. of 1st European Conference on Computer Systems (EuroSys)Elnikety, S., Dropsho, S., Zwaenepoel, W., Tashkent+: Memory-aware load balancing and update filtering in replicated databases (2007) Proc. of the 2nd European Conference on Computer Systems (EuroSys)Isard, M., Autopilot: Automatic data center management (2007) Oper. Syst. Rev, 41, pp. 60-67Jiang, Y., Xue, G., You, J., Toward fault-tolerant atomic data access in mutable distributed hash tables (2006) Proc. of First Int. Multi-Symp. on Computer and Computational SciencesLamport, L., Time, Clocks, and the Ordering of Events in a Distributed System (1978) CACM, 21 (7), pp. 558-565Lamport, L., The part-time parliament (1998) ACM Trans. Comput. Syst, 16 (2), pp. 133-169Lamport, L., Paxos, F., (2006) Distrib. Comput, 19 (2), pp. 79-103. , OctLiang, W., Kemme, B., Online recovery in cluster databases (2008) EDBT '08: Proceedings of the 11th international conference on Extending database technology, pp. 121-132. , New York, NY, USA, ACMMacCormick, J., Murphy, N., Najork, M., Thekkath, C.A., Zhou, L., Boxwood: Abstractions as the foundation for storage infrastructure (2004) Proc. of 6th USENIX Symp. on Operating Systems Design and ImplementationManassiev, K., Amza, C., Scaling and continuous availability in database server clusters through multiversion replication (2007) Int. Conf. on Dependable Systems and NetworksOstell, J., Databases of discovery (2005) Queue, 3 (3), pp. 40-48Saito, Y., Frolund, S., Veitch, A., Merchant, A., Spence, S., Fab: Building distributed enterprise disk arrays from commodity components (2004) SIGPLAN Not, 39 (11). , 48-58Vieira, G.M.D., Buzato, L.E., Treplica: Ubiquitous replication (2008) Proc. of 26th Brazilian Symp. on Computer Networks and Distributed SystemsWu, S., Kemme, B., Postgres-R (SI): Combining Replica Control with Concurrency Control Based on Snapshot Isolation (2005) Data Engineering, 2005. ICDE 2005. Proceedings. 21st International Conference on, pp. 422-433