Exploració per autor "Cortés, Toni"
Ara es mostren els items 21-40 de 53
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Enhancing iteration performance on distributed task-based workflows
Barceló Cuerda, Alex; Queralt Calafat, Anna; Cortés, Toni (Elsevier, 2023-12)
Article
Accés restringit per política de l'editorialTask-based programming models have proven to be a robust and versatile way to approach development of applications for distributed environments. They provide natural programming patterns with high performance. However, ... -
Evaluating the effectiveness of REDCAP to recover the locality missed by today's Linux Systems
González Férez, Pilar; Piernas, Juan; Cortés, Toni (2008-10)
Comunicació de congrés
Accés obertIn order to know how different conditions influence the behavior of the RAM Enhanced Disk Cache Project (REDCAP), we have analyzed the impact of the file system and the REDCAP cache size. The results show that, for workloads ... -
Exploring the predictability of MPI messages
Freitag, Fèlix; Caubet Serrabou, Jordi; Farreras Esclusa, Montserrat; Cortés, Toni; Labarta Mancho, Jesús José (IEEE Computer Society, 2003)
Text en actes de congrés
Accés obertScalability to a large number of processes is one of the weaknesses of current MPI implementations. Standard implementations are able to scale to hundreds of nodes, but none beyond that. The main problem of current ... -
FaTLease: scalable fault-tolerant lease negotiation with Paxos
Hupfeld, Felix; Kolbeck, Björn; Stender, Jan; Högqovist, Mikael; Cortés, Toni; Marti, Jonathan; Malo, Jesús (2008-06)
Text en actes de congrés
Accés restringit per política de l'editorialA lease is a token which grants its owner exclusive access to a resource for a defined span of time. In order to be able to tolerate failures, leases need to be coordinated by distributed processes. We present FaTLease, ... -
File system scalability with highly decentralized metadata on independent storage devices
Lensing, Paul Hermann; Cortés, Toni; Hughes, Jim; Brinkmann, Andre (Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper discusses using hard drives that integrate a key-value interface and network access in the actual drive hardware (Kinetic storage platform) to supply file system functionality in a large scale environment. Taking ... -
Freezing time emulating new and faster devices with virtual machines
Bona, Luis C.E.; Elias, Alessandro; Ziviani, Andre P.; Nou, Ramon; Cortés, Toni; Alves, Marco A.Z. (Springer, 2020)
Article
Accés obertRecent proposals of emerging data storage devices make it necessary to reevaluate all levels of the storage hierarchy to optimize the software stack performance. However, these new devices are not always widely available ... -
Freezing Time: a new approach for emulating fast storage devices using VM
Bona, Luis C.E.; Elias, Alessandro; Ziviani, Andre P.; Cortés, Toni; Nou Castell, Ramon; Alves, Marco A.Z. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés
Accés obertRecently we are seeing a considerable effort from both academy and industry in proposing new technologies for storage devices. Often these devices are not readily available for evaluation and methods to allow performing ... -
Fusing storage and computing for the domain of business intelligence and analytics: research opportunities
Queralt Calafat, Anna; Marti Fraiz, Jonathan; Baars, Henning; Brinkmann, Andre; Cortés, Toni (Institute of Electrical and Electronics Engineers (IEEE), 2015)
Text en actes de congrés
Accés restringit per política de l'editorialWith the growing importance of external and shared data, the set of requirements for Business Intelligence and Analytics (BIA) is shifting. Current solutions still come with shortcomings, esp. In multi-stakeholder environments ... -
GekkoFS: A temporary burst buffer file system for HPC applications
Vef, Marc-André; Moti, Nafiseh; Süb, Tim; Tacke, Markus; Tocci, Tommaso; Nou, Ramon; Miranda Bueno, Alberto; Cortés, Toni; Brinkmann, Andre (2020-01-17)
Article
Accés obertMany scientific fields increasingly use high-performance computing (HPC) to process and analyze massive amounts of experimental data while storage systems in today’s HPC environments have to cope with new access patterns. ... -
GekkoFS: A temporary distributed file system for HPC applications
Vef, Marc-André; Moti, Nafiseh; Süb, Tim; Tocci, Tommaso; Nou Castell, Ramon; Miranda, Alberto; Cortés, Toni; Brinkmann, Andre (Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés
Accés obertWe present GekkoFS, a temporary, highly-scalable burst buffer file system which has been specifically optimized for new access patterns of data-intensive High-Performance Computing (HPC) applications. The file system ... -
HetFS: A heterogeneous file system for everyone
Koloventzos, Georgios; Nou Castell, Ramon; Miranda, Alberto; Cortés, Toni (Springer, 2017)
Text en actes de congrés
Accés obertStorage devices have been getting more and more diverse during the last decade. The advent of SSDs made it painfully clear that rotating devices, such as HDDs or magnetic tapes, were lacking in regards to response time. ... -
Improving I/O performance through an in-kernel disk simulator
González Férez, Pilar; Piernas Canovas, Juan; Cortés, Toni (2016-10-01)
Article
Accés obertThis paper presents two mechanisms that can significantly improve the I/O performance of both hard and solid-state drives for read operations: KDSim and REDCAP. KDSim is an in-kernel disk simulator that provides a framework ... -
Improving OpenStack Swift interaction with the I/O stack to enable software defined storage
Nou Castell, Ramon; Miranda, Alberto; Siquier, Marc; Cortés, Toni (Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés
Accés obertThis paper analyses how OpenStack Swift, a distributed object storage service for a globally used middleware, interacts with the I/O subsystem through the Operating System. This interaction, which seems organised and clean ... -
IOStack: Software-Defined Object Storage
Gracia-Tinedo, Raúl; García-López, Pedro; Sánchez-Artigas, Marc; Sampé, Josep; Moatti, Yosef; Rom, Eran; Naor, Dalit; Nou Castell, Ramon; Cortés, Toni; Oppermann, William; Michiardi, Pietro (Institute of Electrical and Electronics Engineers (IEEE), 2016-05-05)
Article
Accés obertThe complexity and scale of today’s cloud storage systems is growing fast. In response to these challenges, Software- Defined Storage (SDS) has recently become a prime candidate to simplify storage management in the ... -
Measuring TCP bandwidth on top of a Gigabit and Myrinet network
Costa Prats, Juan José; Bueno Hedo, Javier; Martorell Bofill, Xavier; Cortés, Toni (2009)
Report de recerca
Accés obertIn this article we measure the bandwidth achieved by the TCP protocol on top of a Gigabit and Myrinet network. We have created a synthetic benchmark, consisting on a server and a client that both produce and consume data, ... -
Performance impacts with reliable parallel file systems at exascale level
Nou Castell, Ramon; Miranda, Alberto; Cortés, Toni (Springer, 2015)
Text en actes de congrés
Accés restringit per política de l'editorialThe introduction of Exascale storage into production systems will lead to an increase on the number of storage servers needed by parallel file systems. In this scenario, parallel file system designers should move from the ... -
Predicting access to persistent objects through static code analysis
Touma, Rizkallah; Queralt Calafat, Anna; Cortés, Toni; Pérez Hernandez, María S. (Springer, 2017)
Text en actes de congrés
Accés obertIn this paper, we present a fully-automatic, high-accuracy approach to predict access to persistent objects through static code analysis of object-oriented applications. The most widely-used previous technique uses a simple ... -
Predicting MPI buffer addresses.
Freitag, Fèlix; Farreras Esclusa, Montserrat; Cortés, Toni; Labarta Mancho, Jesús José (Springer, 2004)
Comunicació de congrés
Accés obertCommunication latencies have been identified as one of the performance limiting factors of message passing applications in clusters of workstations/multiprocessors. On the receiver side, message-copying operations contribute ... -
PyCOMPSs: Parallel computational workflows in Python
Tejedor, Enric; Becerra Fontal, Yolanda; Alomar, Guillem; Queralt Calafat, Anna; Badia Sala, Rosa Maria; Torres Viñals, Jordi; Cortés, Toni; Labarta Mancho, Jesús José (2017-01-01)
Article
Accés obertThe use of the Python programming language for scientific computing has been gaining momentum in the last years. The fact that it is compact and readable and its complete set of scientific libraries are two important ... -
Reliable and randomized data distribution strategies for large scale storage systems
Miranda Bueno, Alberto; Effert, S.; Kang, Y.; Miller, E.L.; Brinkmann, A.; Cortés, Toni (2011)
Text en actes de congrés
Accés obertThe ever-growing amount of data requires highly scalable storage solutions. The most flexible approach is to use storage pools that can be expanded and scaled down by adding or removing storage devices. To make this approach ...