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Staff photo Cristian Klein

Cristian Klein

Cloud architect, speaker and researcher. Father of two. Piano torturer.

Research qualifications: Docent
0000-0003-0106-3049

Contact

E-mail
cristian.klein@umu.se

Works as

Affiliation
Adjunct associate professor at Department of Computing Science
Location
MIT-huset, Umeå universitet, MIT.B.218 Umeå universitet, 901 87 Umeå

I’m a cloud architect at Elastisys and an adjunct lecturer at Umeå University. I received a PhD in 2012 from INRIA, France. I’m experienced in cloud computing, network engineering and information security. I acted variously as a consultant, practitioner, teacher and researcher. When coming out of the clouds, I work out by playing with my two daughters.

Hardware-level QoS enforcement features: technologies, use cases, and research challenges
ACM Computing Surveys
Larsson, Oliver; Metsch, Thijs; Klein, Cristian; et al.
ESTHER: application-first hardware-level QoS-enforcement for cloud native environments
2025 IEEE 18th International Conference on Cloud Computing (CLOUD), IEEE 2025 : 75-85
Larsson, Oliver; Metsch, Thijs; Klein, Cristian; et al.
FaLSE: a failure and latency-aware scheduling for mission-critical applications at the edge
The 16th IEEE International Conference on Cloud Computing Technology and Science, CloudCom2025, Shenzhen, China, November 14-16, 2025
Rasouli, Nayereh; Elmroth, Erik; Klein, Cristian
Resource management for mission-critical applications in edge computing: systematic review on recent research and open issues
ACM Computing Surveys, ACM Digital Library 2025, Vol. 58, (3)
Rasouli, Nayereh; Klein, Cristian; Elmroth, Erik
State-aware application placement in mobile edge clouds
Proceedings of the 14th international conference on cloud computing and services science, Portugal: Science and Technology Publications 2024 : 117-128
Nguyen, Chanh Le Tan; Klein, Cristian; Elmroth, Erik
Fault tolerance infrastructure for mission-critical mobile edge cloud applications
2024 IEEE/ACM 17th International Conference on Utility and Cloud Computing (UCC), IEEE 2024 : 382-388
Rasouli, Nayereh; Klein, Cristian; Elmroth, Erik
The impact of directed pod eviction on Kubernetes resource utilization
2023 IEEE international conference on service-oriented system engineering (SOSE): proceedings, IEEE 2023 : 81-90
Larsson, Oliver; Klein, Cristian; Elmroth, Erik
Breaking the vicious circle: self-adaptive microservice circuit breaking and retry
2023 IEEE international conference on cloud engineering: proceedings, IEEE Computer Society 2023 : 32-42
Saleh Sedghpour, Mohammad Reza; Garlan, David; Schmerl, Bradley; et al.
Hydragen: a microservice benchmark generator
2023 IEEE 16th international conference on cloud computing (CLOUD), IEEE 2023 : 189-200
Saleh Sedghpour, Mohammad Reza; Obeso Duque, Aleksandra; Cai, Xuejun; et al.
Message from the Technical Program Chairs: IC2E 2022
Proceedings of the IEEE International Conference on Cloud Engineering, IEEE 2022 : x-x
Bermbach, David; Krintz, Chandra; Guo, Tian; et al.
A Qualitative Evaluation of Service Mesh-based Traffic Management for Mobile Edge Cloud
22nd IEEE/ACM International Symposium on Cluster, Cloud and Internet Computing, CCGrid 2022: Proceedings, IEEE 2022 : 210-219
Obeso Duque, Aleksandra; Klein, Cristian; Feng, Jinhua; et al.
An Empirical Study of Service Mesh Traffic Management Policies for Microservices
ICPE '22: Proceedings of the 2022 ACM/SPEC on International Conference on Performance Engineering, New York: ACM Digital Library 2022 : 17-27
Saleh Sedghpour, Mohammad Reza; Klein, Cristian; Tordsson, Johan
Adaptive and Application-agnostic Caching in Service Meshes for Resilient Cloud Applications
Proceedings of the 2021 IEEE Conference on Network Softwarization: Accelerating Network Softwarization in the Cognitive Age, NetSoft 2021, IEEE 2021 : 176-180
Larsson, Lars; Tärneberg, William; Klein, Cristian; et al.
Service mesh circuit breaker: From panic button to performance management tool
HAOC '21: Proceedings of the 1st Workshop on High Availability and Observability of Cloud Systems, Association for Computing Machinery (ACM) 2021 : 4-10
Saleh Sedghpour, Mohammad Reza; Klein, Cristian; Tordsson, Johan
Decentralized Kubernetes Federation Control Plane
2020 IEEE/ACM 13TH INTERNATIONAL CONFERENCE ON UTILITY AND CLOUD COMPUTING (UCC 2020), IEEE 2020 : 354-359
Larsson, Lars; Gustafsson, Harald; Klein, Cristian; et al.
Impact of etcd deployment on Kubernetes, Istio, and application performance
Software, practice & experience, John Wiley & Sons 2020, Vol. 50, (10) : 1986-2007
Larsson, Lars; Tarneberg, William; Klein, Cristian; et al.
Elasticity Control for Latency-IntolerantMobile Edge Applications
The Fifth ACM/IEEE Symposium on Edge Computing, Virtual, November 11-13, 2020, Institute of Electrical and Electronics Engineers (IEEE) 2020 : 70-83
Nguyen, Chanh Le Tan; Klein, Cristian; Elmroth, Erik
Security-Performance Trade-offs of Kubernetes Container Runtimes
2020 28th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS), IEEE 2020 : 1-4
Viktorsson, William; Klein, Cristian; Tordsson, Johan
Quality-Elasticity: Improved Resource Utilization, Throughput, and Response Times Via Adjusting Output Quality to Current Operating Conditions
2019 IEEE International Conference on Autonomic Computing (ICAC), IEEE 2019 : 52-62
Larsson, Lars; Tärneberg, William; Klein, Cristian; et al.
Multivariate LSTM-Based Location-Aware Workload Prediction for Edge Data Centers
Proceedings, 19th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing, IEEE 2019 : 341-350
Nguyen, Chanh; Klein, Cristian; Elmroth, Erik
Why Cloud Applications Are not Ready for the Edge (yet)
Proceedings of the 4th ACM/IEEE Symposium on Edge Computing, IEEE 2019 : 250-263
Nguyen, Chanh Le Tan; Mehta, Amardeep; Klein, Cristian; et al.
Virtualization techniques compared: performance, resource, and power usage overheads in clouds
ICPE 2018 - Proceedings of the 2018 ACM/SPEC International Conference on Performance Engineering, ACM Digital Library 2018 : 145-156
Kostentinos Tesfatsion, Selome; Klein, Cristian; Tordsson, Johan
Brownout(CC): Cascaded Control for Bounding the Response Times of Cloud Applications
2018 ANNUAL AMERICAN CONTROL CONFERENCE (ACC), IEEE 2018 : 3354-3361
Nylander, Tommi; Klein, Cristian; Arzen, Karl-Erik; et al.
Virtualization Techniques Compared: Performance, Resource, and Power Usage Overheads in Clouds
ACM/SPEC Internation Conference on Performance Engineering (ICPE)
Tesfatsion, Selome Kostentinos; Klein, Cristian; Tordsson, Johan
Control Strategies for Self-Adaptive Software Systems
ACM Transactions on Autonomous and Adaptive Systems, Vol. 11, (4)
Filieri, Antonio; Maggio, Martina; Angelopoulos, Konstantinos; et al.
KPI-agnostic Control for Fine-Grained Vertical Elasticity
2017 17TH IEEE/ACM INTERNATIONAL SYMPOSIUM ON CLUSTER, CLOUD AND GRID COMPUTING (CCGRID), IEEE 2017 : 589-598
Lakew, Ewnetu Bayuh; Papadopoulos, Alessandro Vittorio; Maggio, Martina; et al.
Location-aware load prediction in edge data centers
2017 Second International Conference on Fog and Mobile Edge Computing (FMEC), IEEE 2017 : 25-31
Nguyen, Chanh Le Tan; Klein, Cristian; Elmroth, Erik
Incentivizing Self-Capping to Increase Cloud Utilization
Proceedings of the 2017 Symposium on Cloud Computing (SOCC '17), Association for Computing Machinery (ACM) 2017 : 52-65
Shahrad, Mohammad; Klein, Cristian; Zheng, Liang; et al.
Retrofitting Admission Control in an Internet-Scale Application
Report / UMINF, 16.17
Chaudhry, Tanmay; Doblander, Christoph; Dammer, Anatol; et al.
Retrofitting Admission Control in an Internet-Scale Application
UMINF Report, 16.17
Chaudhry, Tanmay; Doblander, Christoph; Dammer, Anatol; et al.
High performance fault-tolerance for clouds
2015 IEEE Symposium on Computers and Communication (ISCC), IEEE 2016 : 251-257
Kyriazis, Dimosthenis; Anagnostopoulos, Vasileios; Arcangeli, Andrea; et al.
How beneficial are intermediate layer Data Centers in Mobile Edge Networks?
2016 IEEE 1st International Workshops on Foundations and Applications of Self-* Systems : 222-229
Mehta, Amardeep; Tärneberg, William; Klein, Cristian; et al.
Control-based load-balancing techniques: Analysis and performance evaluation via a randomized optimization approach
Control Engineering Practice, Elsevier 2016, Vol. 52 : 24-34
Papadopoulos, Alessandro Vittorio; Klein, Cristian; Maggio, Martina; et al.
Performance-Based Service Differentiation in Clouds
2015 15th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGrid), IEEE conference proceedings 2015 : 505-514
Lakew, Ewnetu B.; Klein, Cristian; Hernandez-Rodriguez, Francisco; et al.
Control-theoretical load-balancing for cloud applications with brownout
2014 IEEE 53RD ANNUAL CONFERENCE ON DECISION AND CONTROL (CDC) : 5320-5327
Durango, Jonas; Dellkrantz, Manfred; Maggio, Martina; et al.
Brownout: Building More Robust Cloud Applications
36th International Conference on Software Engineering (ICSE 2014), ACM Digital Library 2014 : 700-711
Klein, Cristian; Maggio, Martina; Årzén, Karl-Erik; et al.
Improving Cloud Service Resilience using Brownout-Aware Load-Balancing
2014 IEEE 33rd International Symposium On Reliable Distributed Systems (SRDS), IEEE Computer Society 2014 : 31-40
Klein, Cristian; Papadopoulos, Alessandro Vittorio; Dellkrantz, Manfred; et al.
Towards faster response time models for vertical elasticity
2014 IEEE/ACM 7TH INTERNATIONAL CONFERENCE ON UTILITY AND CLOUD COMPUTING (UCC) : 560-565
Lakew, Ewnetu Bayuh; Cristian, Klein; Francisco, Hernandez-Rodriguez; et al.
Control strategies for predictable brownouts in cloud computing
Proceedings of the 19th World Congress, The International Federation of Automatic Control, Elsevier 2014 : 689-694
Maggio, Martina; Klein, Cristian; Årzén, Karl-Erik
The straw that broke the camel’s back: safe cloud overbooking with application brownout
2014 International Conference on Cloud and Autonomic Computing (ICCAC 2014), IEEE Press 2014 : 151-160
Tomás, Luis; Klein, Cristian; Tordsson, Johan; et al.
Resource Management Architecture for Fair Scheduling of Optional Computations
2013 Eighth International Conference on P2P, Parallel, Grid, Cloud and Internet Computing: 3PGCIC 2013, IEEE Computer Society 2013 : 113-120
Camillo, Frédéric; Caron, Eddy; Guivarch, Ronan; et al.
Resource management for service level aware cloud applications
IEEE Computer Society 2013
Klein, Cristian; Maggio, Martina; Årzén, Karl-Erik; et al.
Introducing Service-level Awareness in the Cloud
Lund University Open Access 2013
Klein, Cristian; Maggio, Martina; Årzén, Karl-Erik; et al.
Introducing Service-level Awareness in the Cloud
Proceedings of the 4th annual Symposium on Cloud Computing
Klein, Cristian; Maggio, Martina; Årzén, Karl-Erik; et al.
Decentralized Kubernetes Federation Control Plane
Larsson, Lars; Gustafsson, Harald; Klein, Cristian; et al.
Towards Soft Circuit Breaking in Service Meshes via Application-agnostic Caching
Larsson, Lars; Tärneberg, William; Klein, Cristian; et al.
Artifact evaluation for distributed systems: current practices and beyond
Saleh Sedghpour, Mohammad Reza; Papadopoulos, Alessandro Vittorio; Klein, Cristian; et al.
View publications in DiVA

Research groups

Research leaders
Autonomous Distributed Systems Lab

Research projects

1 August 2023 until 31 July 2027
Arbitrating QoS Factors for Mission Critical Applications at the Edge of the Network
1 September 2022 until 31 August 2026
Intelligent Service Mesh for an Autonomous Network-Compute Fabric
1 September 2018 until 31 August 2021
Management Beyond the Edge
1 January 2016 until 31 December 2020
Autonomous Cloud Management
1 January 2016 until 31 December 2020
Mobility-aware Resource Management for Mobile Edge Clouds

I teach at the intersection of cloud computing and information security.